text: 'use strict';
  
  Object.defineProperty(exports, '__esModule', { value: true });
  
  const beforeExpr = true;
  const startsExpr = true;
  const isLoop = true;
  const isAssign = true;
  const prefix = true;
  const postfix = true;
  class TokenType {
    constructor(label, conf = {}) {
      this.label = void 0;
      this.keyword = void 0;
      this.beforeExpr = void 0;
      this.startsExpr = void 0;
      this.rightAssociative = void 0;
      this.isLoop = void 0;
      this.isAssign = void 0;
      this.prefix = void 0;
      this.postfix = void 0;
      this.binop = void 0;
      this.updateContext = void 0;
      this.label = label;
      this.keyword = conf.keyword;
      this.beforeExpr = !!conf.beforeExpr;
      this.startsExpr = !!conf.startsExpr;
      this.rightAssociative = !!conf.rightAssociative;
      this.isLoop = !!conf.isLoop;
      this.isAssign = !!conf.isAssign;
      this.prefix = !!conf.prefix;
      this.postfix = !!conf.postfix;
      this.binop = conf.binop != null ? conf.binop : null;
      this.updateContext = null;
    }
  
  }
  const keywords$1 = new Map();
  
  function createKeyword(name, options = {}) {
    options.keyword = name;
    const token = new TokenType(name, options);
    keywords$1.set(name, token);
    return token;
  }
  
  function createBinop(name, binop) {
    return new TokenType(name, {
      beforeExpr,
      binop
    });
  }
  
  const types$1 = {
    num: new TokenType("num", {
      startsExpr
    }),
    bigint: new TokenType("bigint", {
      startsExpr
    }),
    decimal: new TokenType("decimal", {
      startsExpr
    }),
    regexp: new TokenType("regexp", {
      startsExpr
    }),
    string: new TokenType("string", {
      startsExpr
    }),
    name: new TokenType("name", {
      startsExpr
    }),
    privateName: new TokenType("#name", {
      startsExpr
    }),
    eof: new TokenType("eof"),
    bracketL: new TokenType("[", {
      beforeExpr,
      startsExpr
    }),
    bracketHashL: new TokenType("#[", {
      beforeExpr,
      startsExpr
    }),
    bracketBarL: new TokenType("[|", {
      beforeExpr,
      startsExpr
    }),
    bracketR: new TokenType("]"),
    bracketBarR: new TokenType("|]"),
    braceL: new TokenType("{", {
      beforeExpr,
      startsExpr
    }),
    braceBarL: new TokenType("{|", {
      beforeExpr,
      startsExpr
    }),
    braceHashL: new TokenType("#{", {
      beforeExpr,
      startsExpr
    }),
    braceR: new TokenType("}", {
      beforeExpr
    }),
    braceBarR: new TokenType("|}"),
    parenL: new TokenType("(", {
      beforeExpr,
      startsExpr
    }),
    parenR: new TokenType(")"),
    comma: new TokenType(",", {
      beforeExpr
    }),
    semi: new TokenType(";", {
      beforeExpr
    }),
    colon: new TokenType(":", {
      beforeExpr
    }),
    doubleColon: new TokenType("::", {
      beforeExpr
    }),
    dot: new TokenType("."),
    question: new TokenType("?", {
      beforeExpr
    }),
    questionDot: new TokenType("?."),
    arrow: new TokenType("=>", {
      beforeExpr
    }),
    template: new TokenType("template"),
    ellipsis: new TokenType("...", {
      beforeExpr
    }),
    backQuote: new TokenType("`", {
      startsExpr
    }),
    dollarBraceL: new TokenType("${", {
      beforeExpr,
      startsExpr
    }),
    at: new TokenType("@"),
    hash: new TokenType("#", {
      startsExpr
    }),
    interpreterDirective: new TokenType("#!..."),
    eq: new TokenType("=", {
      beforeExpr,
      isAssign
    }),
    assign: new TokenType("_=", {
      beforeExpr,
      isAssign
    }),
    slashAssign: new TokenType("_=", {
      beforeExpr,
      isAssign
    }),
    incDec: new TokenType("++/--", {
      prefix,
      postfix,
      startsExpr
    }),
    bang: new TokenType("!", {
      beforeExpr,
      prefix,
      startsExpr
    }),
    tilde: new TokenType("~", {
      beforeExpr,
      prefix,
      startsExpr
    }),
    pipeline: createBinop("|>", 0),
    nullishCoalescing: createBinop("??", 1),
    logicalOR: createBinop("||", 1),
    logicalAND: createBinop("&&", 2),
    bitwiseOR: createBinop("|", 3),
    bitwiseXOR: createBinop("^", 4),
    bitwiseAND: createBinop("&", 5),
    equality: createBinop("==/!=/===/!==", 6),
    relational: createBinop("</>/<=/>=", 7),
    bitShift: createBinop("<</>>/>>>", 8),
    plusMin: new TokenType("+/-", {
      beforeExpr,
      binop: 9,
      prefix,
      startsExpr
    }),
    modulo: new TokenType("%", {
      beforeExpr,
      binop: 10,
      startsExpr
    }),
    star: new TokenType("*", {
      binop: 10
    }),
    slash: createBinop("/", 10),
    exponent: new TokenType("**", {
      beforeExpr,
      binop: 11,
      rightAssociative: true
    }),
    _break: createKeyword("break"),
    _case: createKeyword("case", {
      beforeExpr
    }),
    _catch: createKeyword("catch"),
    _continue: createKeyword("continue"),
    _debugger: createKeyword("debugger"),
    _default: createKeyword("default", {
      beforeExpr
    }),
    _do: createKeyword("do", {
      isLoop,
      beforeExpr
    }),
    _else: createKeyword("else", {
      beforeExpr
    }),
    _finally: createKeyword("finally"),
    _for: createKeyword("for", {
      isLoop
    }),
    _function: createKeyword("function", {
      startsExpr
    }),
    _if: createKeyword("if"),
    _return: createKeyword("return", {
      beforeExpr
    }),
    _switch: createKeyword("switch"),
    _throw: createKeyword("throw", {
      beforeExpr,
      prefix,
      startsExpr
    }),
    _try: createKeyword("try"),
    _var: createKeyword("var"),
    _const: createKeyword("const"),
    _while: createKeyword("while", {
      isLoop
    }),
    _with: createKeyword("with"),
    _new: createKeyword("new", {
      beforeExpr,
      startsExpr
    }),
    _this: createKeyword("this", {
      startsExpr
    }),
    _super: createKeyword("super", {
      startsExpr
    }),
    _class: createKeyword("class", {
      startsExpr
    }),
    _extends: createKeyword("extends", {
      beforeExpr
    }),
    _export: createKeyword("export"),
    _import: createKeyword("import", {
      startsExpr
    }),
    _null: createKeyword("null", {
      startsExpr
    }),
    _true: createKeyword("true", {
      startsExpr
    }),
    _false: createKeyword("false", {
      startsExpr
    }),
    _in: createKeyword("in", {
      beforeExpr,
      binop: 7
    }),
    _instanceof: createKeyword("instanceof", {
      beforeExpr,
      binop: 7
    }),
    _typeof: createKeyword("typeof", {
      beforeExpr,
      prefix,
      startsExpr
    }),
    _void: createKeyword("void", {
      beforeExpr,
      prefix,
      startsExpr
    }),
    _delete: createKeyword("delete", {
      beforeExpr,
      prefix,
      startsExpr
    })
  };
  
  const lineBreak = /\r\n?|[\n\u2028\u2029]/;
  const lineBreakG = new RegExp(lineBreak.source, "g");
  function isNewLine(code) {
    switch (code) {
      case 10:
      case 13:
      case 8232:
      case 8233:
        return true;
  
      default:
        return false;
    }
  }
  const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
  function isWhitespace(code) {
    switch (code) {
      case 0x0009:
      case 0x000b:
      case 0x000c:
      case 32:
      case 160:
      case 5760:
      case 0x2000:
      case 0x2001:
      case 0x2002:
      case 0x2003:
      case 0x2004:
      case 0x2005:
      case 0x2006:
      case 0x2007:
      case 0x2008:
      case 0x2009:
      case 0x200a:
      case 0x202f:
      case 0x205f:
      case 0x3000:
      case 0xfeff:
        return true;
  
      default:
        return false;
    }
  }
  
  class Position {
    constructor(line, col) {
      this.line = void 0;
      this.column = void 0;
      this.line = line;
      this.column = col;
    }
  
  }
  class SourceLocation {
    constructor(start, end) {
      this.start = void 0;
      this.end = void 0;
      this.filename = void 0;
      this.identifierName = void 0;
      this.start = start;
      this.end = end;
    }
  
  }
  function getLineInfo(input, offset) {
    let line = 1;
    let lineStart = 0;
    let match;
    lineBreakG.lastIndex = 0;
  
    while ((match = lineBreakG.exec(input)) && match.index < offset) {
      line++;
      lineStart = lineBreakG.lastIndex;
    }
  
    return new Position(line, offset - lineStart);
  }
  
  class BaseParser {
    constructor() {
      this.sawUnambiguousESM = false;
      this.ambiguousScriptDifferentAst = false;
    }
  
    hasPlugin(name) {
      return this.plugins.has(name);
    }
  
    getPluginOption(plugin, name) {
      if (this.hasPlugin(plugin)) return this.plugins.get(plugin)[name];
    }
  
  }
  
  function setTrailingComments(node, comments) {
    if (node.trailingComments === undefined) {
      node.trailingComments = comments;
    } else {
      node.trailingComments.unshift(...comments);
    }
  }
  
  function setInnerComments(node, comments) {
    if (node.innerComments === undefined) {
      node.innerComments = comments;
    } else if (comments !== undefined) {
      node.innerComments.unshift(...comments);
    }
  }
  
  function adjustInnerComments(node, elements, commentWS) {
    let lastElement = null;
    let i = elements.length;
  
    while (lastElement === null && i > 0) {
      lastElement = elements[--i];
    }
  
    if (lastElement === null || lastElement.start > commentWS.start) {
      setInnerComments(node, commentWS.comments);
    } else {
      setTrailingComments(lastElement, commentWS.comments);
    }
  }
  
  class CommentsParser extends BaseParser {
    addComment(comment) {
      if (this.filename) comment.loc.filename = this.filename;
      this.state.comments.push(comment);
    }
  
    processComment(node) {
      const {
        commentStack
      } = this.state;
      const commentStackLength = commentStack.length;
      if (commentStackLength === 0) return;
      let i = commentStackLength - 1;
      const lastCommentWS = commentStack[i];
  
      if (lastCommentWS.start === node.end) {
        lastCommentWS.leadingNode = node;
        i--;
      }
  
      const {
        start: nodeStart
      } = node;
  
      for (; i >= 0; i--) {
        const commentWS = commentStack[i];
        const commentEnd = commentWS.end;
  
        if (commentEnd > nodeStart) {
          commentWS.containingNode = node;
          this.finalizeComment(commentWS);
          commentStack.splice(i, 1);
        } else {
          if (commentEnd === nodeStart) {
            commentWS.trailingNode = node;
          }
  
          break;
        }
      }
    }
  
    finalizeComment(commentWS) {
      const {
        comments
      } = commentWS;
  
      if (commentWS.leadingNode !== null || commentWS.trailingNode !== null) {
        if (commentWS.leadingNode !== null) {
          setTrailingComments(commentWS.leadingNode, comments);
        }
  
        if (commentWS.trailingNode !== null) {
          commentWS.trailingNode.leadingComments = comments;
        }
      } else {
        const {
          containingNode: node,
          start: commentStart
        } = commentWS;
  
        if (this.input.charCodeAt(commentStart - 1) === 44) {
          switch (node.type) {
            case "ObjectExpression":
            case "ObjectPattern":
            case "RecordExpression":
              adjustInnerComments(node, node.properties, commentWS);
              break;
  
            case "CallExpression":
            case "OptionalCallExpression":
              adjustInnerComments(node, node.arguments, commentWS);
              break;
  
            case "FunctionDeclaration":
            case "FunctionExpression":
            case "ArrowFunctionExpression":
            case "ObjectMethod":
            case "ClassMethod":
            case "ClassPrivateMethod":
              adjustInnerComments(node, node.params, commentWS);
              break;
  
            case "ArrayExpression":
            case "ArrayPattern":
            case "TupleExpression":
              adjustInnerComments(node, node.elements, commentWS);
              break;
  
            case "ExportNamedDeclaration":
            case "ImportDeclaration":
              adjustInnerComments(node, node.specifiers, commentWS);
              break;
  
            default:
              {
                setInnerComments(node, comments);
              }
          }
        } else {
          setInnerComments(node, comments);
        }
      }
    }
  
    finalizeRemainingComments() {
      const {
        commentStack
      } = this.state;
  
      for (let i = commentStack.length - 1; i >= 0; i--) {
        this.finalizeComment(commentStack[i]);
      }
  
      this.state.commentStack = [];
    }
  
    resetPreviousNodeTrailingComments(node) {
      const {
        commentStack
      } = this.state;
      const {
        length
      } = commentStack;
      if (length === 0) return;
      const commentWS = commentStack[length - 1];
  
      if (commentWS.leadingNode === node) {
        commentWS.leadingNode = null;
      }
    }
  
  }
  
  const ErrorCodes = Object.freeze({
    SyntaxError: "BABEL_PARSER_SYNTAX_ERROR",
    SourceTypeModuleError: "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED"
  });
  
  const ErrorMessages = makeErrorTemplates({
    AccessorIsGenerator: "A %0ter cannot be a generator.",
    ArgumentsInClass: "'arguments' is only allowed in functions and class methods.",
    AsyncFunctionInSingleStatementContext: "Async functions can only be declared at the top level or inside a block.",
    AwaitBindingIdentifier: "Can not use 'await' as identifier inside an async function.",
    AwaitBindingIdentifierInStaticBlock: "Can not use 'await' as identifier inside a static block.",
    AwaitExpressionFormalParameter: "'await' is not allowed in async function parameters.",
    AwaitNotInAsyncContext: "'await' is only allowed within async functions and at the top levels of modules.",
    AwaitNotInAsyncFunction: "'await' is only allowed within async functions.",
    BadGetterArity: "A 'get' accesor must not have any formal parameters.",
    BadSetterArity: "A 'set' accesor must have exactly one formal parameter.",
    BadSetterRestParameter: "A 'set' accesor function argument must not be a rest parameter.",
    ConstructorClassField: "Classes may not have a field named 'constructor'.",
    ConstructorClassPrivateField: "Classes may not have a private field named '#constructor'.",
    ConstructorIsAccessor: "Class constructor may not be an accessor.",
    ConstructorIsAsync: "Constructor can't be an async function.",
    ConstructorIsGenerator: "Constructor can't be a generator.",
    DeclarationMissingInitializer: "'%0' require an initialization value.",
    DecoratorBeforeExport: "Decorators must be placed *before* the 'export' keyword. You can set the 'decoratorsBeforeExport' option to false to use the 'export @decorator class {}' syntax.",
    DecoratorConstructor: "Decorators can't be used with a constructor. Did you mean '@dec class { ... }'?",
    DecoratorExportClass: "Using the export keyword between a decorator and a class is not allowed. Please use `export @dec class` instead.",
    DecoratorSemicolon: "Decorators must not be followed by a semicolon.",
    DecoratorStaticBlock: "Decorators can't be used with a static block.",
    DeletePrivateField: "Deleting a private field is not allowed.",
    DestructureNamedImport: "ES2015 named imports do not destructure. Use another statement for destructuring after the import.",
    DuplicateConstructor: "Duplicate constructor in the same class.",
    DuplicateDefaultExport: "Only one default export allowed per module.",
    DuplicateExport: "`%0` has already been exported. Exported identifiers must be unique.",
    DuplicateProto: "Redefinition of __proto__ property.",
    DuplicateRegExpFlags: "Duplicate regular expression flag.",
    ElementAfterRest: "Rest element must be last element.",
    EscapedCharNotAnIdentifier: "Invalid Unicode escape.",
    ExportBindingIsString: "A string literal cannot be used as an exported binding without `from`.\n- Did you mean `export { '%0' as '%1' } from 'some-module'`?",
    ExportDefaultFromAsIdentifier: "'from' is not allowed as an identifier after 'export default'.",
    ForInOfLoopInitializer: "'%0' loop variable declaration may not have an initializer.",
    ForOfAsync: "The left-hand side of a for-of loop may not be 'async'.",
    ForOfLet: "The left-hand side of a for-of loop may not start with 'let'.",
    GeneratorInSingleStatementContext: "Generators can only be declared at the top level or inside a block.",
    IllegalBreakContinue: "Unsyntactic %0.",
    IllegalLanguageModeDirective: "Illegal 'use strict' directive in function with non-simple parameter list.",
    IllegalReturn: "'return' outside of function.",
    ImportBindingIsString: 'A string literal cannot be used as an imported binding.\n- Did you mean `import { "%0" as foo }`?',
    ImportCallArgumentTrailingComma: "Trailing comma is disallowed inside import(...) arguments.",
    ImportCallArity: "`import()` requires exactly %0.",
    ImportCallNotNewExpression: "Cannot use new with import(...).",
    ImportCallSpreadArgument: "`...` is not allowed in `import()`.",
    InvalidBigIntLiteral: "Invalid BigIntLiteral.",
    InvalidCodePoint: "Code point out of bounds.",
    InvalidDecimal: "Invalid decimal.",
    InvalidDigit: "Expected number in radix %0.",
    InvalidEscapeSequence: "Bad character escape sequence.",
    InvalidEscapeSequenceTemplate: "Invalid escape sequence in template.",
    InvalidEscapedReservedWord: "Escape sequence in keyword %0.",
    InvalidIdentifier: "Invalid identifier %0.",
    InvalidLhs: "Invalid left-hand side in %0.",
    InvalidLhsBinding: "Binding invalid left-hand side in %0.",
    InvalidNumber: "Invalid number.",
    InvalidOrMissingExponent: "Floating-point numbers require a valid exponent after the 'e'.",
    InvalidOrUnexpectedToken: "Unexpected character '%0'.",
    InvalidParenthesizedAssignment: "Invalid parenthesized assignment pattern.",
    InvalidPrivateFieldResolution: "Private name #%0 is not defined.",
    InvalidPropertyBindingPattern: "Binding member expression.",
    InvalidRecordProperty: "Only properties and spread elements are allowed in record definitions.",
    InvalidRestAssignmentPattern: "Invalid rest operator's argument.",
    LabelRedeclaration: "Label '%0' is already declared.",
    LetInLexicalBinding: "'let' is not allowed to be used as a name in 'let' or 'const' declarations.",
    LineTerminatorBeforeArrow: "No line break is allowed before '=>'.",
    MalformedRegExpFlags: "Invalid regular expression flag.",
    MissingClassName: "A class name is required.",
    MissingEqInAssignment: "Only '=' operator can be used for specifying default value.",
    MissingSemicolon: "Missing semicolon.",
    MissingUnicodeEscape: "Expecting Unicode escape sequence \\uXXXX.",
    MixingCoalesceWithLogical: "Nullish coalescing operator(??) requires parens when mixing with logical operators.",
    ModuleAttributeDifferentFromType: "The only accepted module attribute is `type`.",
    ModuleAttributeInvalidValue: "Only string literals are allowed as module attribute values.",
    ModuleAttributesWithDuplicateKeys: 'Duplicate key "%0" is not allowed in module attributes.',
    ModuleExportNameHasLoneSurrogate: "An export name cannot include a lone surrogate, found '\\u%0'.",
    ModuleExportUndefined: "Export '%0' is not defined.",
    MultipleDefaultsInSwitch: "Multiple default clauses.",
    NewlineAfterThrow: "Illegal newline after throw.",
    NoCatchOrFinally: "Missing catch or finally clause.",
    NumberIdentifier: "Identifier directly after number.",
    NumericSeparatorInEscapeSequence: "Numeric separators are not allowed inside unicode escape sequences or hex escape sequences.",
    ObsoleteAwaitStar: "'await*' has been removed from the async functions proposal. Use Promise.all() instead.",
    OptionalChainingNoNew: "Constructors in/after an Optional Chain are not allowed.",
    OptionalChainingNoTemplate: "Tagged Template Literals are not allowed in optionalChain.",
    OverrideOnConstructor: "'override' modifier cannot appear on a constructor declaration.",
    ParamDupe: "Argument name clash.",
    PatternHasAccessor: "Object pattern can't contain getter or setter.",
    PatternHasMethod: "Object pattern can't contain methods.",
    PipelineBodyNoArrow: 'Unexpected arrow "=>" after pipeline body; arrow function in pipeline body must be parenthesized.',
    PipelineBodySequenceExpression: "Pipeline body may not be a comma-separated sequence expression.",
    PipelineHeadSequenceExpression: "Pipeline head should not be a comma-separated sequence expression.",
    PipelineTopicUnused: "Pipeline is in topic style but does not use topic reference.",
    PrimaryTopicNotAllowed: "Topic reference was used in a lexical context without topic binding.",
    PrimaryTopicRequiresSmartPipeline: "Primary Topic Reference found but pipelineOperator not passed 'smart' for 'proposal' option.",
    PrivateInExpectedIn: "Private names are only allowed in property accesses (`obj.#%0`) or in `in` expressions (`#%0 in obj`).",
    PrivateNameRedeclaration: "Duplicate private name #%0.",
    RecordExpressionBarIncorrectEndSyntaxType: "Record expressions ending with '|}' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'.",
    RecordExpressionBarIncorrectStartSyntaxType: "Record expressions starting with '{|' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'.",
    RecordExpressionHashIncorrectStartSyntaxType: "Record expressions starting with '#{' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'hash'.",
    RecordNoProto: "'__proto__' is not allowed in Record expressions.",
    RestTrailingComma: "Unexpected trailing comma after rest element.",
    SloppyFunction: "In non-strict mode code, functions can only be declared at top level, inside a block, or as the body of an if statement.",
    StaticPrototype: "Classes may not have static property named prototype.",
    StrictDelete: "Deleting local variable in strict mode.",
    StrictEvalArguments: "Assigning to '%0' in strict mode.",
    StrictEvalArgumentsBinding: "Binding '%0' in strict mode.",
    StrictFunction: "In strict mode code, functions can only be declared at top level or inside a block.",
    StrictNumericEscape: "The only valid numeric escape in strict mode is '\\0'.",
    StrictOctalLiteral: "Legacy octal literals are not allowed in strict mode.",
    StrictWith: "'with' in strict mode.",
    SuperNotAllowed: "`super()` is only valid inside a class constructor of a subclass. Maybe a typo in the method name ('constructor') or not extending another class?",
    SuperPrivateField: "Private fields can't be accessed on super.",
    TrailingDecorator: "Decorators must be attached to a class element.",
    TupleExpressionBarIncorrectEndSyntaxType: "Tuple expressions ending with '|]' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'.",
    TupleExpressionBarIncorrectStartSyntaxType: "Tuple expressions starting with '[|' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'.",
    TupleExpressionHashIncorrectStartSyntaxType: "Tuple expressions starting with '#[' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'hash'.",
    UnexpectedArgumentPlaceholder: "Unexpected argument placeholder.",
    UnexpectedAwaitAfterPipelineBody: 'Unexpected "await" after pipeline body; await must have parentheses in minimal proposal.',
    UnexpectedDigitAfterHash: "Unexpected digit after hash token.",
    UnexpectedImportExport: "'import' and 'export' may only appear at the top level.",
    UnexpectedKeyword: "Unexpected keyword '%0'.",
    UnexpectedLeadingDecorator: "Leading decorators must be attached to a class declaration.",
    UnexpectedLexicalDeclaration: "Lexical declaration cannot appear in a single-statement context.",
    UnexpectedNewTarget: "`new.target` can only be used in functions or class properties.",
    UnexpectedNumericSeparator: "A numeric separator is only allowed between two digits.",
    UnexpectedPrivateField: "Private names can only be used as the name of a class element (i.e. class C { #p = 42; #m() {} } )\n or a property of member expression (i.e. this.#p).",
    UnexpectedReservedWord: "Unexpected reserved word '%0'.",
    UnexpectedSuper: "'super' is only allowed in object methods and classes.",
    UnexpectedToken: "Unexpected token '%0'.",
    UnexpectedTokenUnaryExponentiation: "Illegal expression. Wrap left hand side or entire exponentiation in parentheses.",
    UnsupportedBind: "Binding should be performed on object property.",
    UnsupportedDecoratorExport: "A decorated export must export a class declaration.",
    UnsupportedDefaultExport: "Only expressions, functions or classes are allowed as the `default` export.",
    UnsupportedImport: "`import` can only be used in `import()` or `import.meta`.",
    UnsupportedMetaProperty: "The only valid meta property for %0 is %0.%1.",
    UnsupportedParameterDecorator: "Decorators cannot be used to decorate parameters.",
    UnsupportedPropertyDecorator: "Decorators cannot be used to decorate object literal properties.",
    UnsupportedSuper: "'super' can only be used with function calls (i.e. super()) or in property accesses (i.e. super.prop or super[prop]).",
    UnterminatedComment: "Unterminated comment.",
    UnterminatedRegExp: "Unterminated regular expression.",
    UnterminatedString: "Unterminated string constant.",
    UnterminatedTemplate: "Unterminated template.",
    VarRedeclaration: "Identifier '%0' has already been declared.",
    YieldBindingIdentifier: "Can not use 'yield' as identifier inside a generator.",
    YieldInParameter: "Yield expression is not allowed in formal parameters.",
    ZeroDigitNumericSeparator: "Numeric separator can not be used after leading 0."
  }, ErrorCodes.SyntaxError);
  const SourceTypeModuleErrorMessages = makeErrorTemplates({
    ImportMetaOutsideModule: `import.meta may appear only with 'sourceType: "module"'`,
    ImportOutsideModule: `'import' and 'export' may appear only with 'sourceType: "module"'`
  }, ErrorCodes.SourceTypeModuleError);
  
  function makeErrorTemplates(messages, code) {
    const templates = {};
    Object.keys(messages).forEach(reasonCode => {
      templates[reasonCode] = Object.freeze({
        code,
        reasonCode,
        template: messages[reasonCode]
      });
    });
    return Object.freeze(templates);
  }
  class ParserError extends CommentsParser {
    getLocationForPosition(pos) {
      let loc;
      if (pos === this.state.start) loc = this.state.startLoc;else if (pos === this.state.lastTokStart) loc = this.state.lastTokStartLoc;else if (pos === this.state.end) loc = this.state.endLoc;else if (pos === this.state.lastTokEnd) loc = this.state.lastTokEndLoc;else loc = getLineInfo(this.input, pos);
      return loc;
    }
  
    raise(pos, {
      code,
      reasonCode,
      template
    }, ...params) {
      return this.raiseWithData(pos, {
        code,
        reasonCode
      }, template, ...params);
    }
  
    raiseOverwrite(pos, {
      code,
      template
    }, ...params) {
      const loc = this.getLocationForPosition(pos);
      const message = template.replace(/%(\d+)/g, (_, i) => params[i]) + ` (${loc.line}:${loc.column})`;
  
      if (this.options.errorRecovery) {
        const errors = this.state.errors;
  
        for (let i = errors.length - 1; i >= 0; i--) {
          const error = errors[i];
  
          if (error.pos === pos) {
            return Object.assign(error, {
              message
            });
          } else if (error.pos < pos) {
            break;
          }
        }
      }
  
      return this._raise({
        code,
        loc,
        pos
      }, message);
    }
  
    raiseWithData(pos, data, errorTemplate, ...params) {
      const loc = this.getLocationForPosition(pos);
      const message = errorTemplate.replace(/%(\d+)/g, (_, i) => params[i]) + ` (${loc.line}:${loc.column})`;
      return this._raise(Object.assign({
        loc,
        pos
      }, data), message);
    }
  
    _raise(errorContext, message) {
      const err = new SyntaxError(message);
      Object.assign(err, errorContext);
  
      if (this.options.errorRecovery) {
        if (!this.isLookahead) this.state.errors.push(err);
        return err;
      } else {
        throw err;
      }
    }
  
  }
  
  var estree = (superClass => class extends superClass {
    parseRegExpLiteral({
      pattern,
      flags
    }) {
      let regex = null;
  
      try {
        regex = new RegExp(pattern, flags);
      } catch (e) {}
  
      const node = this.estreeParseLiteral(regex);
      node.regex = {
        pattern,
        flags
      };
      return node;
    }
  
    parseBigIntLiteral(value) {
      let bigInt;
  
      try {
        bigInt = BigInt(value);
      } catch (_unused) {
        bigInt = null;
      }
  
      const node = this.estreeParseLiteral(bigInt);
      node.bigint = String(node.value || value);
      return node;
    }
  
    parseDecimalLiteral(value) {
      const decimal = null;
      const node = this.estreeParseLiteral(decimal);
      node.decimal = String(node.value || value);
      return node;
    }
  
    estreeParseLiteral(value) {
      return this.parseLiteral(value, "Literal");
    }
  
    parseStringLiteral(value) {
      return this.estreeParseLiteral(value);
    }
  
    parseNumericLiteral(value) {
      return this.estreeParseLiteral(value);
    }
  
    parseNullLiteral() {
      return this.estreeParseLiteral(null);
    }
  
    parseBooleanLiteral(value) {
      return this.estreeParseLiteral(value);
    }
  
    directiveToStmt(directive) {
      const directiveLiteral = directive.value;
      const stmt = this.startNodeAt(directive.start, directive.loc.start);
      const expression = this.startNodeAt(directiveLiteral.start, directiveLiteral.loc.start);
      expression.value = directiveLiteral.extra.expressionValue;
      expression.raw = directiveLiteral.extra.raw;
      stmt.expression = this.finishNodeAt(expression, "Literal", directiveLiteral.end, directiveLiteral.loc.end);
      stmt.directive = directiveLiteral.extra.raw.slice(1, -1);
      return this.finishNodeAt(stmt, "ExpressionStatement", directive.end, directive.loc.end);
    }
  
    initFunction(node, isAsync) {
      super.initFunction(node, isAsync);
      node.expression = false;
    }
  
    checkDeclaration(node) {
      if (node != null && this.isObjectProperty(node)) {
        this.checkDeclaration(node.value);
      } else {
        super.checkDeclaration(node);
      }
    }
  
    getObjectOrClassMethodParams(method) {
      return method.value.params;
    }
  
    isValidDirective(stmt) {
      var _stmt$expression$extr;
  
      return stmt.type === "ExpressionStatement" && stmt.expression.type === "Literal" && typeof stmt.expression.value === "string" && !((_stmt$expression$extr = stmt.expression.extra) != null && _stmt$expression$extr.parenthesized);
    }
  
    stmtToDirective(stmt) {
      const value = stmt.expression.value;
      const directive = super.stmtToDirective(stmt);
      this.addExtra(directive.value, "expressionValue", value);
      return directive;
    }
  
    parseBlockBody(node, ...args) {
      super.parseBlockBody(node, ...args);
      const directiveStatements = node.directives.map(d => this.directiveToStmt(d));
      node.body = directiveStatements.concat(node.body);
      delete node.directives;
    }
  
    pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
      this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true);
  
      if (method.typeParameters) {
        method.value.typeParameters = method.typeParameters;
        delete method.typeParameters;
      }
  
      classBody.body.push(method);
    }
  
    parseMaybePrivateName(...args) {
      const node = super.parseMaybePrivateName(...args);
  
      if (node.type === "PrivateName" && this.getPluginOption("estree", "classFeatures")) {
        return this.convertPrivateNameToPrivateIdentifier(node);
      }
  
      return node;
    }
  
    convertPrivateNameToPrivateIdentifier(node) {
      const name = super.getPrivateNameSV(node);
      node = node;
      delete node.id;
      node.name = name;
      node.type = "PrivateIdentifier";
      return node;
    }
  
    isPrivateName(node) {
      if (!this.getPluginOption("estree", "classFeatures")) {
        return super.isPrivateName(node);
      }
  
      return node.type === "PrivateIdentifier";
    }
  
    getPrivateNameSV(node) {
      if (!this.getPluginOption("estree", "classFeatures")) {
        return super.getPrivateNameSV(node);
      }
  
      return node.name;
    }
  
    parseLiteral(value, type) {
      const node = super.parseLiteral(value, type);
      node.raw = node.extra.raw;
      delete node.extra;
      return node;
    }
  
    parseFunctionBody(node, allowExpression, isMethod = false) {
      super.parseFunctionBody(node, allowExpression, isMethod);
      node.expression = node.body.type !== "BlockStatement";
    }
  
    parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) {
      let funcNode = this.startNode();
      funcNode.kind = node.kind;
      funcNode = super.parseMethod(funcNode, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope);
      funcNode.type = "FunctionExpression";
      delete funcNode.kind;
      node.value = funcNode;
  
      if (type === "ClassPrivateMethod") {
        node.computed = false;
      }
  
      type = "MethodDefinition";
      return this.finishNode(node, type);
    }
  
    parseClassProperty(...args) {
      const propertyNode = super.parseClassProperty(...args);
  
      if (this.getPluginOption("estree", "classFeatures")) {
        propertyNode.type = "PropertyDefinition";
      }
  
      return propertyNode;
    }
  
    parseClassPrivateProperty(...args) {
      const propertyNode = super.parseClassPrivateProperty(...args);
  
      if (this.getPluginOption("estree", "classFeatures")) {
        propertyNode.type = "PropertyDefinition";
        propertyNode.computed = false;
      }
  
      return propertyNode;
    }
  
    parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) {
      const node = super.parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor);
  
      if (node) {
        node.type = "Property";
        if (node.kind === "method") node.kind = "init";
        node.shorthand = false;
      }
  
      return node;
    }
  
    parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors) {
      const node = super.parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors);
  
      if (node) {
        node.kind = "init";
        node.type = "Property";
      }
  
      return node;
    }
  
    toAssignable(node, isLHS = false) {
      if (node != null && this.isObjectProperty(node)) {
        this.toAssignable(node.value, isLHS);
        return node;
      }
  
      return super.toAssignable(node, isLHS);
    }
  
    toAssignableObjectExpressionProp(prop, ...args) {
      if (prop.kind === "get" || prop.kind === "set") {
        this.raise(prop.key.start, ErrorMessages.PatternHasAccessor);
      } else if (prop.method) {
        this.raise(prop.key.start, ErrorMessages.PatternHasMethod);
      } else {
        super.toAssignableObjectExpressionProp(prop, ...args);
      }
    }
  
    finishCallExpression(node, optional) {
      super.finishCallExpression(node, optional);
  
      if (node.callee.type === "Import") {
        node.type = "ImportExpression";
        node.source = node.arguments[0];
  
        if (this.hasPlugin("importAssertions")) {
          var _node$arguments$;
  
          node.attributes = (_node$arguments$ = node.arguments[1]) != null ? _node$arguments$ : null;
        }
  
        delete node.arguments;
        delete node.callee;
      }
  
      return node;
    }
  
    toReferencedArguments(node) {
      if (node.type === "ImportExpression") {
        return;
      }
  
      super.toReferencedArguments(node);
    }
  
    parseExport(node) {
      super.parseExport(node);
  
      switch (node.type) {
        case "ExportAllDeclaration":
          node.exported = null;
          break;
  
        case "ExportNamedDeclaration":
          if (node.specifiers.length === 1 && node.specifiers[0].type === "ExportNamespaceSpecifier") {
            node.type = "ExportAllDeclaration";
            node.exported = node.specifiers[0].exported;
            delete node.specifiers;
          }
  
          break;
      }
  
      return node;
    }
  
    parseSubscript(base, startPos, startLoc, noCalls, state) {
      const node = super.parseSubscript(base, startPos, startLoc, noCalls, state);
  
      if (state.optionalChainMember) {
        if (node.type === "OptionalMemberExpression" || node.type === "OptionalCallExpression") {
          node.type = node.type.substring(8);
        }
  
        if (state.stop) {
          const chain = this.startNodeAtNode(node);
          chain.expression = node;
          return this.finishNode(chain, "ChainExpression");
        }
      } else if (node.type === "MemberExpression" || node.type === "CallExpression") {
        node.optional = false;
      }
  
      return node;
    }
  
    hasPropertyAsPrivateName(node) {
      if (node.type === "ChainExpression") {
        node = node.expression;
      }
  
      return super.hasPropertyAsPrivateName(node);
    }
  
    isOptionalChain(node) {
      return node.type === "ChainExpression";
    }
  
    isObjectProperty(node) {
      return node.type === "Property" && node.kind === "init" && !node.method;
    }
  
    isObjectMethod(node) {
      return node.method || node.kind === "get" || node.kind === "set";
    }
  
  });
  
  class TokContext {
    constructor(token, preserveSpace) {
      this.token = void 0;
      this.preserveSpace = void 0;
      this.token = token;
      this.preserveSpace = !!preserveSpace;
    }
  
  }
  const types = {
    brace: new TokContext("{"),
    template: new TokContext("`", true)
  };
  
  types$1.braceR.updateContext = context => {
    context.pop();
  };
  
  types$1.braceL.updateContext = types$1.braceHashL.updateContext = types$1.dollarBraceL.updateContext = context => {
    context.push(types.brace);
  };
  
  types$1.backQuote.updateContext = context => {
    if (context[context.length - 1] === types.template) {
      context.pop();
    } else {
      context.push(types.template);
    }
  };
  
  let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08c7\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d04-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31bf\u31f0-\u31ff\u3400-\u4dbf\u4e00-\u9ffc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7ca\ua7f5-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab69\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
  let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b55-\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d81-\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1abf\u1ac0\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua82c\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
  const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
  const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
  nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
  const astralIdentifierStartCodes = [0, 11, 2, 25, 2, 18, 2, 1, 2, 14, 3, 13, 35, 122, 70, 52, 268, 28, 4, 48, 48, 31, 14, 29, 6, 37, 11, 29, 3, 35, 5, 7, 2, 4, 43, 157, 19, 35, 5, 35, 5, 39, 9, 51, 157, 310, 10, 21, 11, 7, 153, 5, 3, 0, 2, 43, 2, 1, 4, 0, 3, 22, 11, 22, 10, 30, 66, 18, 2, 1, 11, 21, 11, 25, 71, 55, 7, 1, 65, 0, 16, 3, 2, 2, 2, 28, 43, 28, 4, 28, 36, 7, 2, 27, 28, 53, 11, 21, 11, 18, 14, 17, 111, 72, 56, 50, 14, 50, 14, 35, 349, 41, 7, 1, 79, 28, 11, 0, 9, 21, 107, 20, 28, 22, 13, 52, 76, 44, 33, 24, 27, 35, 30, 0, 3, 0, 9, 34, 4, 0, 13, 47, 15, 3, 22, 0, 2, 0, 36, 17, 2, 24, 85, 6, 2, 0, 2, 3, 2, 14, 2, 9, 8, 46, 39, 7, 3, 1, 3, 21, 2, 6, 2, 1, 2, 4, 4, 0, 19, 0, 13, 4, 159, 52, 19, 3, 21, 2, 31, 47, 21, 1, 2, 0, 185, 46, 42, 3, 37, 47, 21, 0, 60, 42, 14, 0, 72, 26, 230, 43, 117, 63, 32, 7, 3, 0, 3, 7, 2, 1, 2, 23, 16, 0, 2, 0, 95, 7, 3, 38, 17, 0, 2, 0, 29, 0, 11, 39, 8, 0, 22, 0, 12, 45, 20, 0, 35, 56, 264, 8, 2, 36, 18, 0, 50, 29, 113, 6, 2, 1, 2, 37, 22, 0, 26, 5, 2, 1, 2, 31, 15, 0, 328, 18, 190, 0, 80, 921, 103, 110, 18, 195, 2749, 1070, 4050, 582, 8634, 568, 8, 30, 114, 29, 19, 47, 17, 3, 32, 20, 6, 18, 689, 63, 129, 74, 6, 0, 67, 12, 65, 1, 2, 0, 29, 6135, 9, 1237, 43, 8, 8952, 286, 50, 2, 18, 3, 9, 395, 2309, 106, 6, 12, 4, 8, 8, 9, 5991, 84, 2, 70, 2, 1, 3, 0, 3, 1, 3, 3, 2, 11, 2, 0, 2, 6, 2, 64, 2, 3, 3, 7, 2, 6, 2, 27, 2, 3, 2, 4, 2, 0, 4, 6, 2, 339, 3, 24, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 7, 2357, 44, 11, 6, 17, 0, 370, 43, 1301, 196, 60, 67, 8, 0, 1205, 3, 2, 26, 2, 1, 2, 0, 3, 0, 2, 9, 2, 3, 2, 0, 2, 0, 7, 0, 5, 0, 2, 0, 2, 0, 2, 2, 2, 1, 2, 0, 3, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 3, 3, 2, 6, 2, 3, 2, 3, 2, 0, 2, 9, 2, 16, 6, 2, 2, 4, 2, 16, 4421, 42717, 35, 4148, 12, 221, 3, 5761, 15, 7472, 3104, 541, 1507, 4938];
  const astralIdentifierCodes = [509, 0, 227, 0, 150, 4, 294, 9, 1368, 2, 2, 1, 6, 3, 41, 2, 5, 0, 166, 1, 574, 3, 9, 9, 370, 1, 154, 10, 176, 2, 54, 14, 32, 9, 16, 3, 46, 10, 54, 9, 7, 2, 37, 13, 2, 9, 6, 1, 45, 0, 13, 2, 49, 13, 9, 3, 2, 11, 83, 11, 7, 0, 161, 11, 6, 9, 7, 3, 56, 1, 2, 6, 3, 1, 3, 2, 10, 0, 11, 1, 3, 6, 4, 4, 193, 17, 10, 9, 5, 0, 82, 19, 13, 9, 214, 6, 3, 8, 28, 1, 83, 16, 16, 9, 82, 12, 9, 9, 84, 14, 5, 9, 243, 14, 166, 9, 71, 5, 2, 1, 3, 3, 2, 0, 2, 1, 13, 9, 120, 6, 3, 6, 4, 0, 29, 9, 41, 6, 2, 3, 9, 0, 10, 10, 47, 15, 406, 7, 2, 7, 17, 9, 57, 21, 2, 13, 123, 5, 4, 0, 2, 1, 2, 6, 2, 0, 9, 9, 49, 4, 2, 1, 2, 4, 9, 9, 330, 3, 19306, 9, 135, 4, 60, 6, 26, 9, 1014, 0, 2, 54, 8, 3, 82, 0, 12, 1, 19628, 1, 5319, 4, 4, 5, 9, 7, 3, 6, 31, 3, 149, 2, 1418, 49, 513, 54, 5, 49, 9, 0, 15, 0, 23, 4, 2, 14, 1361, 6, 2, 16, 3, 6, 2, 1, 2, 4, 262, 6, 10, 9, 419, 13, 1495, 6, 110, 6, 6, 9, 4759, 9, 787719, 239];
  
  function isInAstralSet(code, set) {
    let pos = 0x10000;
  
    for (let i = 0, length = set.length; i < length; i += 2) {
      pos += set[i];
      if (pos > code) return false;
      pos += set[i + 1];
      if (pos >= code) return true;
    }
  
    return false;
  }
  
  function isIdentifierStart(code) {
    if (code < 65) return code === 36;
    if (code <= 90) return true;
    if (code < 97) return code === 95;
    if (code <= 122) return true;
  
    if (code <= 0xffff) {
      return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code));
    }
  
    return isInAstralSet(code, astralIdentifierStartCodes);
  }
  function isIdentifierChar(code) {
    if (code < 48) return code === 36;
    if (code < 58) return true;
    if (code < 65) return false;
    if (code <= 90) return true;
    if (code < 97) return code === 95;
    if (code <= 122) return true;
  
    if (code <= 0xffff) {
      return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code));
    }
  
    return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes);
  }
  
  const reservedWords = {
    keyword: ["break", "case", "catch", "continue", "debugger", "default", "do", "else", "finally", "for", "function", "if", "return", "switch", "throw", "try", "var", "const", "while", "with", "new", "this", "super", "class", "extends", "export", "import", "null", "true", "false", "in", "instanceof", "typeof", "void", "delete"],
    strict: ["implements", "interface", "let", "package", "private", "protected", "public", "static", "yield"],
    strictBind: ["eval", "arguments"]
  };
  const keywords = new Set(reservedWords.keyword);
  const reservedWordsStrictSet = new Set(reservedWords.strict);
  const reservedWordsStrictBindSet = new Set(reservedWords.strictBind);
  function isReservedWord(word, inModule) {
    return inModule && word === "await" || word === "enum";
  }
  function isStrictReservedWord(word, inModule) {
    return isReservedWord(word, inModule) || reservedWordsStrictSet.has(word);
  }
  function isStrictBindOnlyReservedWord(word) {
    return reservedWordsStrictBindSet.has(word);
  }
  function isStrictBindReservedWord(word, inModule) {
    return isStrictReservedWord(word, inModule) || isStrictBindOnlyReservedWord(word);
  }
  function isKeyword(word) {
    return keywords.has(word);
  }
  
  function isIteratorStart(current, next) {
    return current === 64 && next === 64;
  }
  const reservedWordLikeSet = new Set(["break", "case", "catch", "continue", "debugger", "default", "do", "else", "finally", "for", "function", "if", "return", "switch", "throw", "try", "var", "const", "while", "with", "new", "this", "super", "class", "extends", "export", "import", "null", "true", "false", "in", "instanceof", "typeof", "void", "delete", "implements", "interface", "let", "package", "private", "protected", "public", "static", "yield", "eval", "arguments", "enum", "await"]);
  function canBeReservedWord(word) {
    return reservedWordLikeSet.has(word);
  }
  
  const SCOPE_OTHER = 0b000000000,
        SCOPE_PROGRAM = 0b000000001,
        SCOPE_FUNCTION = 0b000000010,
        SCOPE_ARROW = 0b000000100,
        SCOPE_SIMPLE_CATCH = 0b000001000,
        SCOPE_SUPER = 0b000010000,
        SCOPE_DIRECT_SUPER = 0b000100000,
        SCOPE_CLASS = 0b001000000,
        SCOPE_STATIC_BLOCK = 0b010000000,
        SCOPE_TS_MODULE = 0b100000000,
        SCOPE_VAR = SCOPE_PROGRAM | SCOPE_FUNCTION | SCOPE_TS_MODULE;
  const BIND_KIND_VALUE = 0b000000000001,
        BIND_KIND_TYPE = 0b000000000010,
        BIND_SCOPE_VAR = 0b000000000100,
        BIND_SCOPE_LEXICAL = 0b000000001000,
        BIND_SCOPE_FUNCTION = 0b000000010000,
        BIND_FLAGS_NONE = 0b000001000000,
        BIND_FLAGS_CLASS = 0b000010000000,
        BIND_FLAGS_TS_ENUM = 0b000100000000,
        BIND_FLAGS_TS_CONST_ENUM = 0b001000000000,
        BIND_FLAGS_TS_EXPORT_ONLY = 0b010000000000,
        BIND_FLAGS_FLOW_DECLARE_FN = 0b100000000000;
  const BIND_CLASS = BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_CLASS,
        BIND_LEXICAL = BIND_KIND_VALUE | 0 | BIND_SCOPE_LEXICAL | 0,
        BIND_VAR = BIND_KIND_VALUE | 0 | BIND_SCOPE_VAR | 0,
        BIND_FUNCTION = BIND_KIND_VALUE | 0 | BIND_SCOPE_FUNCTION | 0,
        BIND_TS_INTERFACE = 0 | BIND_KIND_TYPE | 0 | BIND_FLAGS_CLASS,
        BIND_TS_TYPE = 0 | BIND_KIND_TYPE | 0 | 0,
        BIND_TS_ENUM = BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_TS_ENUM,
        BIND_TS_AMBIENT = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY,
        BIND_NONE = 0 | 0 | 0 | BIND_FLAGS_NONE,
        BIND_OUTSIDE = BIND_KIND_VALUE | 0 | 0 | BIND_FLAGS_NONE,
        BIND_TS_CONST_ENUM = BIND_TS_ENUM | BIND_FLAGS_TS_CONST_ENUM,
        BIND_TS_NAMESPACE = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY,
        BIND_FLOW_DECLARE_FN = BIND_FLAGS_FLOW_DECLARE_FN;
  const CLASS_ELEMENT_FLAG_STATIC = 0b100,
        CLASS_ELEMENT_KIND_GETTER = 0b010,
        CLASS_ELEMENT_KIND_SETTER = 0b001,
        CLASS_ELEMENT_KIND_ACCESSOR = CLASS_ELEMENT_KIND_GETTER | CLASS_ELEMENT_KIND_SETTER;
  const CLASS_ELEMENT_STATIC_GETTER = CLASS_ELEMENT_KIND_GETTER | CLASS_ELEMENT_FLAG_STATIC,
        CLASS_ELEMENT_STATIC_SETTER = CLASS_ELEMENT_KIND_SETTER | CLASS_ELEMENT_FLAG_STATIC,
        CLASS_ELEMENT_INSTANCE_GETTER = CLASS_ELEMENT_KIND_GETTER,
        CLASS_ELEMENT_INSTANCE_SETTER = CLASS_ELEMENT_KIND_SETTER,
        CLASS_ELEMENT_OTHER = 0;
  
  class Scope {
    constructor(flags) {
      this.var = new Set();
      this.lexical = new Set();
      this.functions = new Set();
      this.flags = flags;
    }
  
  }
  class ScopeHandler {
    constructor(raise, inModule) {
      this.scopeStack = [];
      this.undefinedExports = new Map();
      this.undefinedPrivateNames = new Map();
      this.raise = raise;
      this.inModule = inModule;
    }
  
    get inFunction() {
      return (this.currentVarScopeFlags() & SCOPE_FUNCTION) > 0;
    }
  
    get allowSuper() {
      return (this.currentThisScopeFlags() & SCOPE_SUPER) > 0;
    }
  
    get allowDirectSuper() {
      return (this.currentThisScopeFlags() & SCOPE_DIRECT_SUPER) > 0;
    }
  
    get inClass() {
      return (this.currentThisScopeFlags() & SCOPE_CLASS) > 0;
    }
  
    get inClassAndNotInNonArrowFunction() {
      const flags = this.currentThisScopeFlags();
      return (flags & SCOPE_CLASS) > 0 && (flags & SCOPE_FUNCTION) === 0;
    }
  
    get inStaticBlock() {
      for (let i = this.scopeStack.length - 1;; i--) {
        const {
          flags
        } = this.scopeStack[i];
  
        if (flags & SCOPE_STATIC_BLOCK) {
          return true;
        }
  
        if (flags & (SCOPE_VAR | SCOPE_CLASS)) {
          return false;
        }
      }
    }
  
    get inNonArrowFunction() {
      return (this.currentThisScopeFlags() & SCOPE_FUNCTION) > 0;
    }
  
    get treatFunctionsAsVar() {
      return this.treatFunctionsAsVarInScope(this.currentScope());
    }
  
    createScope(flags) {
      return new Scope(flags);
    }
  
    enter(flags) {
      this.scopeStack.push(this.createScope(flags));
    }
  
    exit() {
      this.scopeStack.pop();
    }
  
    treatFunctionsAsVarInScope(scope) {
      return !!(scope.flags & SCOPE_FUNCTION || !this.inModule && scope.flags & SCOPE_PROGRAM);
    }
  
    declareName(name, bindingType, pos) {
      let scope = this.currentScope();
  
      if (bindingType & BIND_SCOPE_LEXICAL || bindingType & BIND_SCOPE_FUNCTION) {
        this.checkRedeclarationInScope(scope, name, bindingType, pos);
  
        if (bindingType & BIND_SCOPE_FUNCTION) {
          scope.functions.add(name);
        } else {
          scope.lexical.add(name);
        }
  
        if (bindingType & BIND_SCOPE_LEXICAL) {
          this.maybeExportDefined(scope, name);
        }
      } else if (bindingType & BIND_SCOPE_VAR) {
        for (let i = this.scopeStack.length - 1; i >= 0; --i) {
          scope = this.scopeStack[i];
          this.checkRedeclarationInScope(scope, name, bindingType, pos);
          scope.var.add(name);
          this.maybeExportDefined(scope, name);
          if (scope.flags & SCOPE_VAR) break;
        }
      }
  
      if (this.inModule && scope.flags & SCOPE_PROGRAM) {
        this.undefinedExports.delete(name);
      }
    }
  
    maybeExportDefined(scope, name) {
      if (this.inModule && scope.flags & SCOPE_PROGRAM) {
        this.undefinedExports.delete(name);
      }
    }
  
    checkRedeclarationInScope(scope, name, bindingType, pos) {
      if (this.isRedeclaredInScope(scope, name, bindingType)) {
        this.raise(pos, ErrorMessages.VarRedeclaration, name);
      }
    }
  
    isRedeclaredInScope(scope, name, bindingType) {
      if (!(bindingType & BIND_KIND_VALUE)) return false;
  
      if (bindingType & BIND_SCOPE_LEXICAL) {
        return scope.lexical.has(name) || scope.functions.has(name) || scope.var.has(name);
      }
  
      if (bindingType & BIND_SCOPE_FUNCTION) {
        return scope.lexical.has(name) || !this.treatFunctionsAsVarInScope(scope) && scope.var.has(name);
      }
  
      return scope.lexical.has(name) && !(scope.flags & SCOPE_SIMPLE_CATCH && scope.lexical.values().next().value === name) || !this.treatFunctionsAsVarInScope(scope) && scope.functions.has(name);
    }
  
    checkLocalExport(id) {
      const {
        name
      } = id;
      const topLevelScope = this.scopeStack[0];
  
      if (!topLevelScope.lexical.has(name) && !topLevelScope.var.has(name) && !topLevelScope.functions.has(name)) {
        this.undefinedExports.set(name, id.start);
      }
    }
  
    currentScope() {
      return this.scopeStack[this.scopeStack.length - 1];
    }
  
    currentVarScopeFlags() {
      for (let i = this.scopeStack.length - 1;; i--) {
        const {
          flags
        } = this.scopeStack[i];
  
        if (flags & SCOPE_VAR) {
          return flags;
        }
      }
    }
  
    currentThisScopeFlags() {
      for (let i = this.scopeStack.length - 1;; i--) {
        const {
          flags
        } = this.scopeStack[i];
  
        if (flags & (SCOPE_VAR | SCOPE_CLASS) && !(flags & SCOPE_ARROW)) {
          return flags;
        }
      }
    }
  
  }
  
  class FlowScope extends Scope {
    constructor(...args) {
      super(...args);
      this.declareFunctions = new Set();
    }
  
  }
  
  class FlowScopeHandler extends ScopeHandler {
    createScope(flags) {
      return new FlowScope(flags);
    }
  
    declareName(name, bindingType, pos) {
      const scope = this.currentScope();
  
      if (bindingType & BIND_FLAGS_FLOW_DECLARE_FN) {
        this.checkRedeclarationInScope(scope, name, bindingType, pos);
        this.maybeExportDefined(scope, name);
        scope.declareFunctions.add(name);
        return;
      }
  
      super.declareName(...arguments);
    }
  
    isRedeclaredInScope(scope, name, bindingType) {
      if (super.isRedeclaredInScope(...arguments)) return true;
  
      if (bindingType & BIND_FLAGS_FLOW_DECLARE_FN) {
        return !scope.declareFunctions.has(name) && (scope.lexical.has(name) || scope.functions.has(name));
      }
  
      return false;
    }
  
    checkLocalExport(id) {
      if (!this.scopeStack[0].declareFunctions.has(id.name)) {
        super.checkLocalExport(id);
      }
    }
  
  }
  
  const reservedTypes = new Set(["_", "any", "bool", "boolean", "empty", "extends", "false", "interface", "mixed", "null", "number", "static", "string", "true", "typeof", "void"]);
  const FlowErrors = makeErrorTemplates({
    AmbiguousConditionalArrow: "Ambiguous expression: wrap the arrow functions in parentheses to disambiguate.",
    AmbiguousDeclareModuleKind: "Found both `declare module.exports` and `declare export` in the same module. Modules can only have 1 since they are either an ES module or they are a CommonJS module.",
    AssignReservedType: "Cannot overwrite reserved type %0.",
    DeclareClassElement: "The `declare` modifier can only appear on class fields.",
    DeclareClassFieldInitializer: "Initializers are not allowed in fields with the `declare` modifier.",
    DuplicateDeclareModuleExports: "Duplicate `declare module.exports` statement.",
    EnumBooleanMemberNotInitialized: "Boolean enum members need to be initialized. Use either `%0 = true,` or `%0 = false,` in enum `%1`.",
    EnumDuplicateMemberName: "Enum member names need to be unique, but the name `%0` has already been used before in enum `%1`.",
    EnumInconsistentMemberValues: "Enum `%0` has inconsistent member initializers. Either use no initializers, or consistently use literals (either booleans, numbers, or strings) for all member initializers.",
    EnumInvalidExplicitType: "Enum type `%1` is not valid. Use one of `boolean`, `number`, `string`, or `symbol` in enum `%0`.",
    EnumInvalidExplicitTypeUnknownSupplied: "Supplied enum type is not valid. Use one of `boolean`, `number`, `string`, or `symbol` in enum `%0`.",
    EnumInvalidMemberInitializerPrimaryType: "Enum `%0` has type `%2`, so the initializer of `%1` needs to be a %2 literal.",
    EnumInvalidMemberInitializerSymbolType: "Symbol enum members cannot be initialized. Use `%1,` in enum `%0`.",
    EnumInvalidMemberInitializerUnknownType: "The enum member initializer for `%1` needs to be a literal (either a boolean, number, or string) in enum `%0`.",
    EnumInvalidMemberName: "Enum member names cannot start with lowercase 'a' through 'z'. Instead of using `%0`, consider using `%1`, in enum `%2`.",
    EnumNumberMemberNotInitialized: "Number enum members need to be initialized, e.g. `%1 = 1` in enum `%0`.",
    EnumStringMemberInconsistentlyInitailized: "String enum members need to consistently either all use initializers, or use no initializers, in enum `%0`.",
    GetterMayNotHaveThisParam: "A getter cannot have a `this` parameter.",
    ImportTypeShorthandOnlyInPureImport: "The `type` and `typeof` keywords on named imports can only be used on regular `import` statements. It cannot be used with `import type` or `import typeof` statements.",
    InexactInsideExact: "Explicit inexact syntax cannot appear inside an explicit exact object type.",
    InexactInsideNonObject: "Explicit inexact syntax cannot appear in class or interface definitions.",
    InexactVariance: "Explicit inexact syntax cannot have variance.",
    InvalidNonTypeImportInDeclareModule: "Imports within a `declare module` body must always be `import type` or `import typeof`.",
    MissingTypeParamDefault: "Type parameter declaration needs a default, since a preceding type parameter declaration has a default.",
    NestedDeclareModule: "`declare module` cannot be used inside another `declare module`.",
    NestedFlowComment: "Cannot have a flow comment inside another flow comment.",
    OptionalBindingPattern: "A binding pattern parameter cannot be optional in an implementation signature.",
    SetterMayNotHaveThisParam: "A setter cannot have a `this` parameter.",
    SpreadVariance: "Spread properties cannot have variance.",
    ThisParamAnnotationRequired: "A type annotation is required for the `this` parameter.",
    ThisParamBannedInConstructor: "Constructors cannot have a `this` parameter; constructors don't bind `this` like other functions.",
    ThisParamMayNotBeOptional: "The `this` parameter cannot be optional.",
    ThisParamMustBeFirst: "The `this` parameter must be the first function parameter.",
    ThisParamNoDefault: "The `this` parameter may not have a default value.",
    TypeBeforeInitializer: "Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`.",
    TypeCastInPattern: "The type cast expression is expected to be wrapped with parenthesis.",
    UnexpectedExplicitInexactInObject: "Explicit inexact syntax must appear at the end of an inexact object.",
    UnexpectedReservedType: "Unexpected reserved type %0.",
    UnexpectedReservedUnderscore: "`_` is only allowed as a type argument to call or new.",
    UnexpectedSpaceBetweenModuloChecks: "Spaces between `%` and `checks` are not allowed here.",
    UnexpectedSpreadType: "Spread operator cannot appear in class or interface definitions.",
    UnexpectedSubtractionOperand: 'Unexpected token, expected "number" or "bigint".',
    UnexpectedTokenAfterTypeParameter: "Expected an arrow function after this type parameter declaration.",
    UnexpectedTypeParameterBeforeAsyncArrowFunction: "Type parameters must come after the async keyword, e.g. instead of `<T> async () => {}`, use `async <T>() => {}`.",
    UnsupportedDeclareExportKind: "`declare export %0` is not supported. Use `%1` instead.",
    UnsupportedStatementInDeclareModule: "Only declares and type imports are allowed inside declare module.",
    UnterminatedFlowComment: "Unterminated flow-comment."
  }, ErrorCodes.SyntaxError);
  
  function isEsModuleType(bodyElement) {
    return bodyElement.type === "DeclareExportAllDeclaration" || bodyElement.type === "DeclareExportDeclaration" && (!bodyElement.declaration || bodyElement.declaration.type !== "TypeAlias" && bodyElement.declaration.type !== "InterfaceDeclaration");
  }
  
  function hasTypeImportKind(node) {
    return node.importKind === "type" || node.importKind === "typeof";
  }
  
  function isMaybeDefaultImport(state) {
    return (state.type === types$1.name || !!state.type.keyword) && state.value !== "from";
  }
  
  const exportSuggestions = {
    const: "declare export var",
    let: "declare export var",
    type: "export type",
    interface: "export interface"
  };
  
  function partition(list, test) {
    const list1 = [];
    const list2 = [];
  
    for (let i = 0; i < list.length; i++) {
      (test(list[i], i, list) ? list1 : list2).push(list[i]);
    }
  
    return [list1, list2];
  }
  
  const FLOW_PRAGMA_REGEX = /\*?\s*@((?:no)?flow)\b/;
  var flow = (superClass => class extends superClass {
    constructor(...args) {
      super(...args);
      this.flowPragma = undefined;
    }
  
    getScopeHandler() {
      return FlowScopeHandler;
    }
  
    shouldParseTypes() {
      return this.getPluginOption("flow", "all") || this.flowPragma === "flow";
    }
  
    shouldParseEnums() {
      return !!this.getPluginOption("flow", "enums");
    }
  
    finishToken(type, val) {
      if (type !== types$1.string && type !== types$1.semi && type !== types$1.interpreterDirective) {
        if (this.flowPragma === undefined) {
          this.flowPragma = null;
        }
      }
  
      return super.finishToken(type, val);
    }
  
    addComment(comment) {
      if (this.flowPragma === undefined) {
        const matches = FLOW_PRAGMA_REGEX.exec(comment.value);
  
        if (!matches) ; else if (matches[1] === "flow") {
          this.flowPragma = "flow";
        } else if (matches[1] === "noflow") {
          this.flowPragma = "noflow";
        } else {
          throw new Error("Unexpected flow pragma");
        }
      }
  
      return super.addComment(comment);
    }
  
    flowParseTypeInitialiser(tok) {
      const oldInType = this.state.inType;
      this.state.inType = true;
      this.expect(tok || types$1.colon);
      const type = this.flowParseType();
      this.state.inType = oldInType;
      return type;
    }
  
    flowParsePredicate() {
      const node = this.startNode();
      const moduloPos = this.state.start;
      this.next();
      this.expectContextual("checks");
  
      if (this.state.lastTokStart > moduloPos + 1) {
        this.raise(moduloPos, FlowErrors.UnexpectedSpaceBetweenModuloChecks);
      }
  
      if (this.eat(types$1.parenL)) {
        node.value = this.parseExpression();
        this.expect(types$1.parenR);
        return this.finishNode(node, "DeclaredPredicate");
      } else {
        return this.finishNode(node, "InferredPredicate");
      }
    }
  
    flowParseTypeAndPredicateInitialiser() {
      const oldInType = this.state.inType;
      this.state.inType = true;
      this.expect(types$1.colon);
      let type = null;
      let predicate = null;
  
      if (this.match(types$1.modulo)) {
        this.state.inType = oldInType;
        predicate = this.flowParsePredicate();
      } else {
        type = this.flowParseType();
        this.state.inType = oldInType;
  
        if (this.match(types$1.modulo)) {
          predicate = this.flowParsePredicate();
        }
      }
  
      return [type, predicate];
    }
  
    flowParseDeclareClass(node) {
      this.next();
      this.flowParseInterfaceish(node, true);
      return this.finishNode(node, "DeclareClass");
    }
  
    flowParseDeclareFunction(node) {
      this.next();
      const id = node.id = this.parseIdentifier();
      const typeNode = this.startNode();
      const typeContainer = this.startNode();
  
      if (this.isRelational("<")) {
        typeNode.typeParameters = this.flowParseTypeParameterDeclaration();
      } else {
        typeNode.typeParameters = null;
      }
  
      this.expect(types$1.parenL);
      const tmp = this.flowParseFunctionTypeParams();
      typeNode.params = tmp.params;
      typeNode.rest = tmp.rest;
      typeNode.this = tmp._this;
      this.expect(types$1.parenR);
      [typeNode.returnType, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
      typeContainer.typeAnnotation = this.finishNode(typeNode, "FunctionTypeAnnotation");
      id.typeAnnotation = this.finishNode(typeContainer, "TypeAnnotation");
      this.resetEndLocation(id);
      this.semicolon();
      this.scope.declareName(node.id.name, BIND_FLOW_DECLARE_FN, node.id.start);
      return this.finishNode(node, "DeclareFunction");
    }
  
    flowParseDeclare(node, insideModule) {
      if (this.match(types$1._class)) {
        return this.flowParseDeclareClass(node);
      } else if (this.match(types$1._function)) {
        return this.flowParseDeclareFunction(node);
      } else if (this.match(types$1._var)) {
        return this.flowParseDeclareVariable(node);
      } else if (this.eatContextual("module")) {
        if (this.match(types$1.dot)) {
          return this.flowParseDeclareModuleExports(node);
        } else {
          if (insideModule) {
            this.raise(this.state.lastTokStart, FlowErrors.NestedDeclareModule);
          }
  
          return this.flowParseDeclareModule(node);
        }
      } else if (this.isContextual("type")) {
        return this.flowParseDeclareTypeAlias(node);
      } else if (this.isContextual("opaque")) {
        return this.flowParseDeclareOpaqueType(node);
      } else if (this.isContextual("interface")) {
        return this.flowParseDeclareInterface(node);
      } else if (this.match(types$1._export)) {
        return this.flowParseDeclareExportDeclaration(node, insideModule);
      } else {
        throw this.unexpected();
      }
    }
  
    flowParseDeclareVariable(node) {
      this.next();
      node.id = this.flowParseTypeAnnotatableIdentifier(true);
      this.scope.declareName(node.id.name, BIND_VAR, node.id.start);
      this.semicolon();
      return this.finishNode(node, "DeclareVariable");
    }
  
    flowParseDeclareModule(node) {
      this.scope.enter(SCOPE_OTHER);
  
      if (this.match(types$1.string)) {
        node.id = this.parseExprAtom();
      } else {
        node.id = this.parseIdentifier();
      }
  
      const bodyNode = node.body = this.startNode();
      const body = bodyNode.body = [];
      this.expect(types$1.braceL);
  
      while (!this.match(types$1.braceR)) {
        let bodyNode = this.startNode();
  
        if (this.match(types$1._import)) {
          this.next();
  
          if (!this.isContextual("type") && !this.match(types$1._typeof)) {
            this.raise(this.state.lastTokStart, FlowErrors.InvalidNonTypeImportInDeclareModule);
          }
  
          this.parseImport(bodyNode);
        } else {
          this.expectContextual("declare", FlowErrors.UnsupportedStatementInDeclareModule);
          bodyNode = this.flowParseDeclare(bodyNode, true);
        }
  
        body.push(bodyNode);
      }
  
      this.scope.exit();
      this.expect(types$1.braceR);
      this.finishNode(bodyNode, "BlockStatement");
      let kind = null;
      let hasModuleExport = false;
      body.forEach(bodyElement => {
        if (isEsModuleType(bodyElement)) {
          if (kind === "CommonJS") {
            this.raise(bodyElement.start, FlowErrors.AmbiguousDeclareModuleKind);
          }
  
          kind = "ES";
        } else if (bodyElement.type === "DeclareModuleExports") {
          if (hasModuleExport) {
            this.raise(bodyElement.start, FlowErrors.DuplicateDeclareModuleExports);
          }
  
          if (kind === "ES") {
            this.raise(bodyElement.start, FlowErrors.AmbiguousDeclareModuleKind);
          }
  
          kind = "CommonJS";
          hasModuleExport = true;
        }
      });
      node.kind = kind || "CommonJS";
      return this.finishNode(node, "DeclareModule");
    }
  
    flowParseDeclareExportDeclaration(node, insideModule) {
      this.expect(types$1._export);
  
      if (this.eat(types$1._default)) {
        if (this.match(types$1._function) || this.match(types$1._class)) {
          node.declaration = this.flowParseDeclare(this.startNode());
        } else {
          node.declaration = this.flowParseType();
          this.semicolon();
        }
  
        node.default = true;
        return this.finishNode(node, "DeclareExportDeclaration");
      } else {
        if (this.match(types$1._const) || this.isLet() || (this.isContextual("type") || this.isContextual("interface")) && !insideModule) {
          const label = this.state.value;
          const suggestion = exportSuggestions[label];
          throw this.raise(this.state.start, FlowErrors.UnsupportedDeclareExportKind, label, suggestion);
        }
  
        if (this.match(types$1._var) || this.match(types$1._function) || this.match(types$1._class) || this.isContextual("opaque")) {
            node.declaration = this.flowParseDeclare(this.startNode());
            node.default = false;
            return this.finishNode(node, "DeclareExportDeclaration");
          } else if (this.match(types$1.star) || this.match(types$1.braceL) || this.isContextual("interface") || this.isContextual("type") || this.isContextual("opaque")) {
            node = this.parseExport(node);
  
            if (node.type === "ExportNamedDeclaration") {
              node.type = "ExportDeclaration";
              node.default = false;
              delete node.exportKind;
            }
  
            node.type = "Declare" + node.type;
            return node;
          }
      }
  
      throw this.unexpected();
    }
  
    flowParseDeclareModuleExports(node) {
      this.next();
      this.expectContextual("exports");
      node.typeAnnotation = this.flowParseTypeAnnotation();
      this.semicolon();
      return this.finishNode(node, "DeclareModuleExports");
    }
  
    flowParseDeclareTypeAlias(node) {
      this.next();
      this.flowParseTypeAlias(node);
      node.type = "DeclareTypeAlias";
      return node;
    }
  
    flowParseDeclareOpaqueType(node) {
      this.next();
      this.flowParseOpaqueType(node, true);
      node.type = "DeclareOpaqueType";
      return node;
    }
  
    flowParseDeclareInterface(node) {
      this.next();
      this.flowParseInterfaceish(node);
      return this.finishNode(node, "DeclareInterface");
    }
  
    flowParseInterfaceish(node, isClass = false) {
      node.id = this.flowParseRestrictedIdentifier(!isClass, true);
      this.scope.declareName(node.id.name, isClass ? BIND_FUNCTION : BIND_LEXICAL, node.id.start);
  
      if (this.isRelational("<")) {
        node.typeParameters = this.flowParseTypeParameterDeclaration();
      } else {
        node.typeParameters = null;
      }
  
      node.extends = [];
      node.implements = [];
      node.mixins = [];
  
      if (this.eat(types$1._extends)) {
        do {
          node.extends.push(this.flowParseInterfaceExtends());
        } while (!isClass && this.eat(types$1.comma));
      }
  
      if (this.isContextual("mixins")) {
        this.next();
  
        do {
          node.mixins.push(this.flowParseInterfaceExtends());
        } while (this.eat(types$1.comma));
      }
  
      if (this.isContextual("implements")) {
        this.next();
  
        do {
          node.implements.push(this.flowParseInterfaceExtends());
        } while (this.eat(types$1.comma));
      }
  
      node.body = this.flowParseObjectType({
        allowStatic: isClass,
        allowExact: false,
        allowSpread: false,
        allowProto: isClass,
        allowInexact: false
      });
    }
  
    flowParseInterfaceExtends() {
      const node = this.startNode();
      node.id = this.flowParseQualifiedTypeIdentifier();
  
      if (this.isRelational("<")) {
        node.typeParameters = this.flowParseTypeParameterInstantiation();
      } else {
        node.typeParameters = null;
      }
  
      return this.finishNode(node, "InterfaceExtends");
    }
  
    flowParseInterface(node) {
      this.flowParseInterfaceish(node);
      return this.finishNode(node, "InterfaceDeclaration");
    }
  
    checkNotUnderscore(word) {
      if (word === "_") {
        this.raise(this.state.start, FlowErrors.UnexpectedReservedUnderscore);
      }
    }
  
    checkReservedType(word, startLoc, declaration) {
      if (!reservedTypes.has(word)) return;
      this.raise(startLoc, declaration ? FlowErrors.AssignReservedType : FlowErrors.UnexpectedReservedType, word);
    }
  
    flowParseRestrictedIdentifier(liberal, declaration) {
      this.checkReservedType(this.state.value, this.state.start, declaration);
      return this.parseIdentifier(liberal);
    }
  
    flowParseTypeAlias(node) {
      node.id = this.flowParseRestrictedIdentifier(false, true);
      this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.start);
  
      if (this.isRelational("<")) {
        node.typeParameters = this.flowParseTypeParameterDeclaration();
      } else {
        node.typeParameters = null;
      }
  
      node.right = this.flowParseTypeInitialiser(types$1.eq);
      this.semicolon();
      return this.finishNode(node, "TypeAlias");
    }
  
    flowParseOpaqueType(node, declare) {
      this.expectContextual("type");
      node.id = this.flowParseRestrictedIdentifier(true, true);
      this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.start);
  
      if (this.isRelational("<")) {
        node.typeParameters = this.flowParseTypeParameterDeclaration();
      } else {
        node.typeParameters = null;
      }
  
      node.supertype = null;
  
      if (this.match(types$1.colon)) {
        node.supertype = this.flowParseTypeInitialiser(types$1.colon);
      }
  
      node.impltype = null;
  
      if (!declare) {
        node.impltype = this.flowParseTypeInitialiser(types$1.eq);
      }
  
      this.semicolon();
      return this.finishNode(node, "OpaqueType");
    }
  
    flowParseTypeParameter(requireDefault = false) {
      const nodeStart = this.state.start;
      const node = this.startNode();
      const variance = this.flowParseVariance();
      const ident = this.flowParseTypeAnnotatableIdentifier();
      node.name = ident.name;
      node.variance = variance;
      node.bound = ident.typeAnnotation;
  
      if (this.match(types$1.eq)) {
        this.eat(types$1.eq);
        node.default = this.flowParseType();
      } else {
        if (requireDefault) {
          this.raise(nodeStart, FlowErrors.MissingTypeParamDefault);
        }
      }
  
      return this.finishNode(node, "TypeParameter");
    }
  
    flowParseTypeParameterDeclaration() {
      const oldInType = this.state.inType;
      const node = this.startNode();
      node.params = [];
      this.state.inType = true;
  
      if (this.isRelational("<") || this.match(types$1.jsxTagStart)) {
        this.next();
      } else {
        this.unexpected();
      }
  
      let defaultRequired = false;
  
      do {
        const typeParameter = this.flowParseTypeParameter(defaultRequired);
        node.params.push(typeParameter);
  
        if (typeParameter.default) {
          defaultRequired = true;
        }
  
        if (!this.isRelational(">")) {
          this.expect(types$1.comma);
        }
      } while (!this.isRelational(">"));
  
      this.expectRelational(">");
      this.state.inType = oldInType;
      return this.finishNode(node, "TypeParameterDeclaration");
    }
  
    flowParseTypeParameterInstantiation() {
      const node = this.startNode();
      const oldInType = this.state.inType;
      node.params = [];
      this.state.inType = true;
      this.expectRelational("<");
      const oldNoAnonFunctionType = this.state.noAnonFunctionType;
      this.state.noAnonFunctionType = false;
  
      while (!this.isRelational(">")) {
        node.params.push(this.flowParseType());
  
        if (!this.isRelational(">")) {
          this.expect(types$1.comma);
        }
      }
  
      this.state.noAnonFunctionType = oldNoAnonFunctionType;
      this.expectRelational(">");
      this.state.inType = oldInType;
      return this.finishNode(node, "TypeParameterInstantiation");
    }
  
    flowParseTypeParameterInstantiationCallOrNew() {
      const node = this.startNode();
      const oldInType = this.state.inType;
      node.params = [];
      this.state.inType = true;
      this.expectRelational("<");
  
      while (!this.isRelational(">")) {
        node.params.push(this.flowParseTypeOrImplicitInstantiation());
  
        if (!this.isRelational(">")) {
          this.expect(types$1.comma);
        }
      }
  
      this.expectRelational(">");
      this.state.inType = oldInType;
      return this.finishNode(node, "TypeParameterInstantiation");
    }
  
    flowParseInterfaceType() {
      const node = this.startNode();
      this.expectContextual("interface");
      node.extends = [];
  
      if (this.eat(types$1._extends)) {
        do {
          node.extends.push(this.flowParseInterfaceExtends());
        } while (this.eat(types$1.comma));
      }
  
      node.body = this.flowParseObjectType({
        allowStatic: false,
        allowExact: false,
        allowSpread: false,
        allowProto: false,
        allowInexact: false
      });
      return this.finishNode(node, "InterfaceTypeAnnotation");
    }
  
    flowParseObjectPropertyKey() {
      return this.match(types$1.num) || this.match(types$1.string) ? this.parseExprAtom() : this.parseIdentifier(true);
    }
  
    flowParseObjectTypeIndexer(node, isStatic, variance) {
      node.static = isStatic;
  
      if (this.lookahead().type === types$1.colon) {
        node.id = this.flowParseObjectPropertyKey();
        node.key = this.flowParseTypeInitialiser();
      } else {
        node.id = null;
        node.key = this.flowParseType();
      }
  
      this.expect(types$1.bracketR);
      node.value = this.flowParseTypeInitialiser();
      node.variance = variance;
      return this.finishNode(node, "ObjectTypeIndexer");
    }
  
    flowParseObjectTypeInternalSlot(node, isStatic) {
      node.static = isStatic;
      node.id = this.flowParseObjectPropertyKey();
      this.expect(types$1.bracketR);
      this.expect(types$1.bracketR);
  
      if (this.isRelational("<") || this.match(types$1.parenL)) {
        node.method = true;
        node.optional = false;
        node.value = this.flowParseObjectTypeMethodish(this.startNodeAt(node.start, node.loc.start));
      } else {
        node.method = false;
  
        if (this.eat(types$1.question)) {
          node.optional = true;
        }
  
        node.value = this.flowParseTypeInitialiser();
      }
  
      return this.finishNode(node, "ObjectTypeInternalSlot");
    }
  
    flowParseObjectTypeMethodish(node) {
      node.params = [];
      node.rest = null;
      node.typeParameters = null;
      node.this = null;
  
      if (this.isRelational("<")) {
        node.typeParameters = this.flowParseTypeParameterDeclaration();
      }
  
      this.expect(types$1.parenL);
  
      if (this.match(types$1._this)) {
        node.this = this.flowParseFunctionTypeParam(true);
        node.this.name = null;
  
        if (!this.match(types$1.parenR)) {
          this.expect(types$1.comma);
        }
      }
  
      while (!this.match(types$1.parenR) && !this.match(types$1.ellipsis)) {
        node.params.push(this.flowParseFunctionTypeParam(false));
  
        if (!this.match(types$1.parenR)) {
          this.expect(types$1.comma);
        }
      }
  
      if (this.eat(types$1.ellipsis)) {
        node.rest = this.flowParseFunctionTypeParam(false);
      }
  
      this.expect(types$1.parenR);
      node.returnType = this.flowParseTypeInitialiser();
      return this.finishNode(node, "FunctionTypeAnnotation");
    }
  
    flowParseObjectTypeCallProperty(node, isStatic) {
      const valueNode = this.startNode();
      node.static = isStatic;
      node.value = this.flowParseObjectTypeMethodish(valueNode);
      return this.finishNode(node, "ObjectTypeCallProperty");
    }
  
    flowParseObjectType({
      allowStatic,
      allowExact,
      allowSpread,
      allowProto,
      allowInexact
    }) {
      const oldInType = this.state.inType;
      this.state.inType = true;
      const nodeStart = this.startNode();
      nodeStart.callProperties = [];
      nodeStart.properties = [];
      nodeStart.indexers = [];
      nodeStart.internalSlots = [];
      let endDelim;
      let exact;
      let inexact = false;
  
      if (allowExact && this.match(types$1.braceBarL)) {
        this.expect(types$1.braceBarL);
        endDelim = types$1.braceBarR;
        exact = true;
      } else {
        this.expect(types$1.braceL);
        endDelim = types$1.braceR;
        exact = false;
      }
  
      nodeStart.exact = exact;
  
      while (!this.match(endDelim)) {
        let isStatic = false;
        let protoStart = null;
        let inexactStart = null;
        const node = this.startNode();
  
        if (allowProto && this.isContextual("proto")) {
          const lookahead = this.lookahead();
  
          if (lookahead.type !== types$1.colon && lookahead.type !== types$1.question) {
            this.next();
            protoStart = this.state.start;
            allowStatic = false;
          }
        }
  
        if (allowStatic && this.isContextual("static")) {
          const lookahead = this.lookahead();
  
          if (lookahead.type !== types$1.colon && lookahead.type !== types$1.question) {
            this.next();
            isStatic = true;
          }
        }
  
        const variance = this.flowParseVariance();
  
        if (this.eat(types$1.bracketL)) {
          if (protoStart != null) {
            this.unexpected(protoStart);
          }
  
          if (this.eat(types$1.bracketL)) {
            if (variance) {
              this.unexpected(variance.start);
            }
  
            nodeStart.internalSlots.push(this.flowParseObjectTypeInternalSlot(node, isStatic));
          } else {
            nodeStart.indexers.push(this.flowParseObjectTypeIndexer(node, isStatic, variance));
          }
        } else if (this.match(types$1.parenL) || this.isRelational("<")) {
          if (protoStart != null) {
            this.unexpected(protoStart);
          }
  
          if (variance) {
            this.unexpected(variance.start);
          }
  
          nodeStart.callProperties.push(this.flowParseObjectTypeCallProperty(node, isStatic));
        } else {
          let kind = "init";
  
          if (this.isContextual("get") || this.isContextual("set")) {
            const lookahead = this.lookahead();
  
            if (lookahead.type === types$1.name || lookahead.type === types$1.string || lookahead.type === types$1.num) {
              kind = this.state.value;
              this.next();
            }
          }
  
          const propOrInexact = this.flowParseObjectTypeProperty(node, isStatic, protoStart, variance, kind, allowSpread, allowInexact != null ? allowInexact : !exact);
  
          if (propOrInexact === null) {
            inexact = true;
            inexactStart = this.state.lastTokStart;
          } else {
            nodeStart.properties.push(propOrInexact);
          }
        }
  
        this.flowObjectTypeSemicolon();
  
        if (inexactStart && !this.match(types$1.braceR) && !this.match(types$1.braceBarR)) {
          this.raise(inexactStart, FlowErrors.UnexpectedExplicitInexactInObject);
        }
      }
  
      this.expect(endDelim);
  
      if (allowSpread) {
        nodeStart.inexact = inexact;
      }
  
      const out = this.finishNode(nodeStart, "ObjectTypeAnnotation");
      this.state.inType = oldInType;
      return out;
    }
  
    flowParseObjectTypeProperty(node, isStatic, protoStart, variance, kind, allowSpread, allowInexact) {
      if (this.eat(types$1.ellipsis)) {
        const isInexactToken = this.match(types$1.comma) || this.match(types$1.semi) || this.match(types$1.braceR) || this.match(types$1.braceBarR);
  
        if (isInexactToken) {
          if (!allowSpread) {
            this.raise(this.state.lastTokStart, FlowErrors.InexactInsideNonObject);
          } else if (!allowInexact) {
            this.raise(this.state.lastTokStart, FlowErrors.InexactInsideExact);
          }
  
          if (variance) {
            this.raise(variance.start, FlowErrors.InexactVariance);
          }
  
          return null;
        }
  
        if (!allowSpread) {
          this.raise(this.state.lastTokStart, FlowErrors.UnexpectedSpreadType);
        }
  
        if (protoStart != null) {
          this.unexpected(protoStart);
        }
  
        if (variance) {
          this.raise(variance.start, FlowErrors.SpreadVariance);
        }
  
        node.argument = this.flowParseType();
        return this.finishNode(node, "ObjectTypeSpreadProperty");
      } else {
        node.key = this.flowParseObjectPropertyKey();
        node.static = isStatic;
        node.proto = protoStart != null;
        node.kind = kind;
        let optional = false;
  
        if (this.isRelational("<") || this.match(types$1.parenL)) {
          node.method = true;
  
          if (protoStart != null) {
            this.unexpected(protoStart);
          }
  
          if (variance) {
            this.unexpected(variance.start);
          }
  
          node.value = this.flowParseObjectTypeMethodish(this.startNodeAt(node.start, node.loc.start));
  
          if (kind === "get" || kind === "set") {
            this.flowCheckGetterSetterParams(node);
          }
  
          if (!allowSpread && node.key.name === "constructor" && node.value.this) {
            this.raise(node.value.this.start, FlowErrors.ThisParamBannedInConstructor);
          }
        } else {
          if (kind !== "init") this.unexpected();
          node.method = false;
  
          if (this.eat(types$1.question)) {
            optional = true;
          }
  
          node.value = this.flowParseTypeInitialiser();
          node.variance = variance;
        }
  
        node.optional = optional;
        return this.finishNode(node, "ObjectTypeProperty");
      }
    }
  
    flowCheckGetterSetterParams(property) {
      const paramCount = property.kind === "get" ? 0 : 1;
      const start = property.start;
      const length = property.value.params.length + (property.value.rest ? 1 : 0);
  
      if (property.value.this) {
        this.raise(property.value.this.start, property.kind === "get" ? FlowErrors.GetterMayNotHaveThisParam : FlowErrors.SetterMayNotHaveThisParam);
      }
  
      if (length !== paramCount) {
        if (property.kind === "get") {
          this.raise(start, ErrorMessages.BadGetterArity);
        } else {
          this.raise(start, ErrorMessages.BadSetterArity);
        }
      }
  
      if (property.kind === "set" && property.value.rest) {
        this.raise(start, ErrorMessages.BadSetterRestParameter);
      }
    }
  
    flowObjectTypeSemicolon() {
      if (!this.eat(types$1.semi) && !this.eat(types$1.comma) && !this.match(types$1.braceR) && !this.match(types$1.braceBarR)) {
        this.unexpected();
      }
    }
  
    flowParseQualifiedTypeIdentifier(startPos, startLoc, id) {
      startPos = startPos || this.state.start;
      startLoc = startLoc || this.state.startLoc;
      let node = id || this.flowParseRestrictedIdentifier(true);
  
      while (this.eat(types$1.dot)) {
        const node2 = this.startNodeAt(startPos, startLoc);
        node2.qualification = node;
        node2.id = this.flowParseRestrictedIdentifier(true);
        node = this.finishNode(node2, "QualifiedTypeIdentifier");
      }
  
      return node;
    }
  
    flowParseGenericType(startPos, startLoc, id) {
      const node = this.startNodeAt(startPos, startLoc);
      node.typeParameters = null;
      node.id = this.flowParseQualifiedTypeIdentifier(startPos, startLoc, id);
  
      if (this.isRelational("<")) {
        node.typeParameters = this.flowParseTypeParameterInstantiation();
      }
  
      return this.finishNode(node, "GenericTypeAnnotation");
    }
  
    flowParseTypeofType() {
      const node = this.startNode();
      this.expect(types$1._typeof);
      node.argument = this.flowParsePrimaryType();
      return this.finishNode(node, "TypeofTypeAnnotation");
    }
  
    flowParseTupleType() {
      const node = this.startNode();
      node.types = [];
      this.expect(types$1.bracketL);
  
      while (this.state.pos < this.length && !this.match(types$1.bracketR)) {
        node.types.push(this.flowParseType());
        if (this.match(types$1.bracketR)) break;
        this.expect(types$1.comma);
      }
  
      this.expect(types$1.bracketR);
      return this.finishNode(node, "TupleTypeAnnotation");
    }
  
    flowParseFunctionTypeParam(first) {
      let name = null;
      let optional = false;
      let typeAnnotation = null;
      const node = this.startNode();
      const lh = this.lookahead();
      const isThis = this.state.type === types$1._this;
  
      if (lh.type === types$1.colon || lh.type === types$1.question) {
        if (isThis && !first) {
          this.raise(node.start, FlowErrors.ThisParamMustBeFirst);
        }
  
        name = this.parseIdentifier(isThis);
  
        if (this.eat(types$1.question)) {
          optional = true;
  
          if (isThis) {
            this.raise(node.start, FlowErrors.ThisParamMayNotBeOptional);
          }
        }
  
        typeAnnotation = this.flowParseTypeInitialiser();
      } else {
        typeAnnotation = this.flowParseType();
      }
  
      node.name = name;
      node.optional = optional;
      node.typeAnnotation = typeAnnotation;
      return this.finishNode(node, "FunctionTypeParam");
    }
  
    reinterpretTypeAsFunctionTypeParam(type) {
      const node = this.startNodeAt(type.start, type.loc.start);
      node.name = null;
      node.optional = false;
      node.typeAnnotation = type;
      return this.finishNode(node, "FunctionTypeParam");
    }
  
    flowParseFunctionTypeParams(params = []) {
      let rest = null;
      let _this = null;
  
      if (this.match(types$1._this)) {
        _this = this.flowParseFunctionTypeParam(true);
        _this.name = null;
  
        if (!this.match(types$1.parenR)) {
          this.expect(types$1.comma);
        }
      }
  
      while (!this.match(types$1.parenR) && !this.match(types$1.ellipsis)) {
        params.push(this.flowParseFunctionTypeParam(false));
  
        if (!this.match(types$1.parenR)) {
          this.expect(types$1.comma);
        }
      }
  
      if (this.eat(types$1.ellipsis)) {
        rest = this.flowParseFunctionTypeParam(false);
      }
  
      return {
        params,
        rest,
        _this
      };
    }
  
    flowIdentToTypeAnnotation(startPos, startLoc, node, id) {
      switch (id.name) {
        case "any":
          return this.finishNode(node, "AnyTypeAnnotation");
  
        case "bool":
        case "boolean":
          return this.finishNode(node, "BooleanTypeAnnotation");
  
        case "mixed":
          return this.finishNode(node, "MixedTypeAnnotation");
  
        case "empty":
          return this.finishNode(node, "EmptyTypeAnnotation");
  
        case "number":
          return this.finishNode(node, "NumberTypeAnnotation");
  
        case "string":
          return this.finishNode(node, "StringTypeAnnotation");
  
        case "symbol":
          return this.finishNode(node, "SymbolTypeAnnotation");
  
        default:
          this.checkNotUnderscore(id.name);
          return this.flowParseGenericType(startPos, startLoc, id);
      }
    }
  
    flowParsePrimaryType() {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const node = this.startNode();
      let tmp;
      let type;
      let isGroupedType = false;
      const oldNoAnonFunctionType = this.state.noAnonFunctionType;
  
      switch (this.state.type) {
        case types$1.name:
          if (this.isContextual("interface")) {
            return this.flowParseInterfaceType();
          }
  
          return this.flowIdentToTypeAnnotation(startPos, startLoc, node, this.parseIdentifier());
  
        case types$1.braceL:
          return this.flowParseObjectType({
            allowStatic: false,
            allowExact: false,
            allowSpread: true,
            allowProto: false,
            allowInexact: true
          });
  
        case types$1.braceBarL:
          return this.flowParseObjectType({
            allowStatic: false,
            allowExact: true,
            allowSpread: true,
            allowProto: false,
            allowInexact: false
          });
  
        case types$1.bracketL:
          this.state.noAnonFunctionType = false;
          type = this.flowParseTupleType();
          this.state.noAnonFunctionType = oldNoAnonFunctionType;
          return type;
  
        case types$1.relational:
          if (this.state.value === "<") {
            node.typeParameters = this.flowParseTypeParameterDeclaration();
            this.expect(types$1.parenL);
            tmp = this.flowParseFunctionTypeParams();
            node.params = tmp.params;
            node.rest = tmp.rest;
            node.this = tmp._this;
            this.expect(types$1.parenR);
            this.expect(types$1.arrow);
            node.returnType = this.flowParseType();
            return this.finishNode(node, "FunctionTypeAnnotation");
          }
  
          break;
  
        case types$1.parenL:
          this.next();
  
          if (!this.match(types$1.parenR) && !this.match(types$1.ellipsis)) {
            if (this.match(types$1.name) || this.match(types$1._this)) {
              const token = this.lookahead().type;
              isGroupedType = token !== types$1.question && token !== types$1.colon;
            } else {
              isGroupedType = true;
            }
          }
  
          if (isGroupedType) {
            this.state.noAnonFunctionType = false;
            type = this.flowParseType();
            this.state.noAnonFunctionType = oldNoAnonFunctionType;
  
            if (this.state.noAnonFunctionType || !(this.match(types$1.comma) || this.match(types$1.parenR) && this.lookahead().type === types$1.arrow)) {
              this.expect(types$1.parenR);
              return type;
            } else {
              this.eat(types$1.comma);
            }
          }
  
          if (type) {
            tmp = this.flowParseFunctionTypeParams([this.reinterpretTypeAsFunctionTypeParam(type)]);
          } else {
            tmp = this.flowParseFunctionTypeParams();
          }
  
          node.params = tmp.params;
          node.rest = tmp.rest;
          node.this = tmp._this;
          this.expect(types$1.parenR);
          this.expect(types$1.arrow);
          node.returnType = this.flowParseType();
          node.typeParameters = null;
          return this.finishNode(node, "FunctionTypeAnnotation");
  
        case types$1.string:
          return this.parseLiteral(this.state.value, "StringLiteralTypeAnnotation");
  
        case types$1._true:
        case types$1._false:
          node.value = this.match(types$1._true);
          this.next();
          return this.finishNode(node, "BooleanLiteralTypeAnnotation");
  
        case types$1.plusMin:
          if (this.state.value === "-") {
            this.next();
  
            if (this.match(types$1.num)) {
              return this.parseLiteralAtNode(-this.state.value, "NumberLiteralTypeAnnotation", node);
            }
  
            if (this.match(types$1.bigint)) {
              return this.parseLiteralAtNode(-this.state.value, "BigIntLiteralTypeAnnotation", node);
            }
  
            throw this.raise(this.state.start, FlowErrors.UnexpectedSubtractionOperand);
          }
  
          throw this.unexpected();
  
        case types$1.num:
          return this.parseLiteral(this.state.value, "NumberLiteralTypeAnnotation");
  
        case types$1.bigint:
          return this.parseLiteral(this.state.value, "BigIntLiteralTypeAnnotation");
  
        case types$1._void:
          this.next();
          return this.finishNode(node, "VoidTypeAnnotation");
  
        case types$1._null:
          this.next();
          return this.finishNode(node, "NullLiteralTypeAnnotation");
  
        case types$1._this:
          this.next();
          return this.finishNode(node, "ThisTypeAnnotation");
  
        case types$1.star:
          this.next();
          return this.finishNode(node, "ExistsTypeAnnotation");
  
        default:
          if (this.state.type.keyword === "typeof") {
            return this.flowParseTypeofType();
          } else if (this.state.type.keyword) {
            const label = this.state.type.label;
            this.next();
            return super.createIdentifier(node, label);
          }
  
      }
  
      throw this.unexpected();
    }
  
    flowParsePostfixType() {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      let type = this.flowParsePrimaryType();
      let seenOptionalIndexedAccess = false;
  
      while ((this.match(types$1.bracketL) || this.match(types$1.questionDot)) && !this.canInsertSemicolon()) {
        const node = this.startNodeAt(startPos, startLoc);
        const optional = this.eat(types$1.questionDot);
        seenOptionalIndexedAccess = seenOptionalIndexedAccess || optional;
        this.expect(types$1.bracketL);
  
        if (!optional && this.match(types$1.bracketR)) {
          node.elementType = type;
          this.next();
          type = this.finishNode(node, "ArrayTypeAnnotation");
        } else {
          node.objectType = type;
          node.indexType = this.flowParseType();
          this.expect(types$1.bracketR);
  
          if (seenOptionalIndexedAccess) {
            node.optional = optional;
            type = this.finishNode(node, "OptionalIndexedAccessType");
          } else {
            type = this.finishNode(node, "IndexedAccessType");
          }
        }
      }
  
      return type;
    }
  
    flowParsePrefixType() {
      const node = this.startNode();
  
      if (this.eat(types$1.question)) {
        node.typeAnnotation = this.flowParsePrefixType();
        return this.finishNode(node, "NullableTypeAnnotation");
      } else {
        return this.flowParsePostfixType();
      }
    }
  
    flowParseAnonFunctionWithoutParens() {
      const param = this.flowParsePrefixType();
  
      if (!this.state.noAnonFunctionType && this.eat(types$1.arrow)) {
        const node = this.startNodeAt(param.start, param.loc.start);
        node.params = [this.reinterpretTypeAsFunctionTypeParam(param)];
        node.rest = null;
        node.this = null;
        node.returnType = this.flowParseType();
        node.typeParameters = null;
        return this.finishNode(node, "FunctionTypeAnnotation");
      }
  
      return param;
    }
  
    flowParseIntersectionType() {
      const node = this.startNode();
      this.eat(types$1.bitwiseAND);
      const type = this.flowParseAnonFunctionWithoutParens();
      node.types = [type];
  
      while (this.eat(types$1.bitwiseAND)) {
        node.types.push(this.flowParseAnonFunctionWithoutParens());
      }
  
      return node.types.length === 1 ? type : this.finishNode(node, "IntersectionTypeAnnotation");
    }
  
    flowParseUnionType() {
      const node = this.startNode();
      this.eat(types$1.bitwiseOR);
      const type = this.flowParseIntersectionType();
      node.types = [type];
  
      while (this.eat(types$1.bitwiseOR)) {
        node.types.push(this.flowParseIntersectionType());
      }
  
      return node.types.length === 1 ? type : this.finishNode(node, "UnionTypeAnnotation");
    }
  
    flowParseType() {
      const oldInType = this.state.inType;
      this.state.inType = true;
      const type = this.flowParseUnionType();
      this.state.inType = oldInType;
      return type;
    }
  
    flowParseTypeOrImplicitInstantiation() {
      if (this.state.type === types$1.name && this.state.value === "_") {
        const startPos = this.state.start;
        const startLoc = this.state.startLoc;
        const node = this.parseIdentifier();
        return this.flowParseGenericType(startPos, startLoc, node);
      } else {
        return this.flowParseType();
      }
    }
  
    flowParseTypeAnnotation() {
      const node = this.startNode();
      node.typeAnnotation = this.flowParseTypeInitialiser();
      return this.finishNode(node, "TypeAnnotation");
    }
  
    flowParseTypeAnnotatableIdentifier(allowPrimitiveOverride) {
      const ident = allowPrimitiveOverride ? this.parseIdentifier() : this.flowParseRestrictedIdentifier();
  
      if (this.match(types$1.colon)) {
        ident.typeAnnotation = this.flowParseTypeAnnotation();
        this.resetEndLocation(ident);
      }
  
      return ident;
    }
  
    typeCastToParameter(node) {
      node.expression.typeAnnotation = node.typeAnnotation;
      this.resetEndLocation(node.expression, node.typeAnnotation.end, node.typeAnnotation.loc.end);
      return node.expression;
    }
  
    flowParseVariance() {
      let variance = null;
  
      if (this.match(types$1.plusMin)) {
        variance = this.startNode();
  
        if (this.state.value === "+") {
          variance.kind = "plus";
        } else {
          variance.kind = "minus";
        }
  
        this.next();
        this.finishNode(variance, "Variance");
      }
  
      return variance;
    }
  
    parseFunctionBody(node, allowExpressionBody, isMethod = false) {
      if (allowExpressionBody) {
        return this.forwardNoArrowParamsConversionAt(node, () => super.parseFunctionBody(node, true, isMethod));
      }
  
      return super.parseFunctionBody(node, false, isMethod);
    }
  
    parseFunctionBodyAndFinish(node, type, isMethod = false) {
      if (this.match(types$1.colon)) {
        const typeNode = this.startNode();
        [typeNode.typeAnnotation, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
        node.returnType = typeNode.typeAnnotation ? this.finishNode(typeNode, "TypeAnnotation") : null;
      }
  
      super.parseFunctionBodyAndFinish(node, type, isMethod);
    }
  
    parseStatement(context, topLevel) {
      if (this.state.strict && this.match(types$1.name) && this.state.value === "interface") {
        const lookahead = this.lookahead();
  
        if (lookahead.type === types$1.name || isKeyword(lookahead.value)) {
          const node = this.startNode();
          this.next();
          return this.flowParseInterface(node);
        }
      } else if (this.shouldParseEnums() && this.isContextual("enum")) {
        const node = this.startNode();
        this.next();
        return this.flowParseEnumDeclaration(node);
      }
  
      const stmt = super.parseStatement(context, topLevel);
  
      if (this.flowPragma === undefined && !this.isValidDirective(stmt)) {
        this.flowPragma = null;
      }
  
      return stmt;
    }
  
    parseExpressionStatement(node, expr) {
      if (expr.type === "Identifier") {
        if (expr.name === "declare") {
          if (this.match(types$1._class) || this.match(types$1.name) || this.match(types$1._function) || this.match(types$1._var) || this.match(types$1._export)) {
            return this.flowParseDeclare(node);
          }
        } else if (this.match(types$1.name)) {
          if (expr.name === "interface") {
            return this.flowParseInterface(node);
          } else if (expr.name === "type") {
            return this.flowParseTypeAlias(node);
          } else if (expr.name === "opaque") {
            return this.flowParseOpaqueType(node, false);
          }
        }
      }
  
      return super.parseExpressionStatement(node, expr);
    }
  
    shouldParseExportDeclaration() {
      return this.isContextual("type") || this.isContextual("interface") || this.isContextual("opaque") || this.shouldParseEnums() && this.isContextual("enum") || super.shouldParseExportDeclaration();
    }
  
    isExportDefaultSpecifier() {
      if (this.match(types$1.name) && (this.state.value === "type" || this.state.value === "interface" || this.state.value === "opaque" || this.shouldParseEnums() && this.state.value === "enum")) {
        return false;
      }
  
      return super.isExportDefaultSpecifier();
    }
  
    parseExportDefaultExpression() {
      if (this.shouldParseEnums() && this.isContextual("enum")) {
        const node = this.startNode();
        this.next();
        return this.flowParseEnumDeclaration(node);
      }
  
      return super.parseExportDefaultExpression();
    }
  
    parseConditional(expr, startPos, startLoc, refExpressionErrors) {
      if (!this.match(types$1.question)) return expr;
  
      if (this.state.maybeInArrowParameters) {
        const result = this.tryParse(() => super.parseConditional(expr, startPos, startLoc));
  
        if (!result.node) {
          if (result.error) {
            super.setOptionalParametersError(refExpressionErrors, result.error);
          }
  
          return expr;
        }
  
        if (result.error) this.state = result.failState;
        return result.node;
      }
  
      this.expect(types$1.question);
      const state = this.state.clone();
      const originalNoArrowAt = this.state.noArrowAt;
      const node = this.startNodeAt(startPos, startLoc);
      let {
        consequent,
        failed
      } = this.tryParseConditionalConsequent();
      let [valid, invalid] = this.getArrowLikeExpressions(consequent);
  
      if (failed || invalid.length > 0) {
        const noArrowAt = [...originalNoArrowAt];
  
        if (invalid.length > 0) {
          this.state = state;
          this.state.noArrowAt = noArrowAt;
  
          for (let i = 0; i < invalid.length; i++) {
            noArrowAt.push(invalid[i].start);
          }
  
          ({
            consequent,
            failed
          } = this.tryParseConditionalConsequent());
          [valid, invalid] = this.getArrowLikeExpressions(consequent);
        }
  
        if (failed && valid.length > 1) {
          this.raise(state.start, FlowErrors.AmbiguousConditionalArrow);
        }
  
        if (failed && valid.length === 1) {
          this.state = state;
          this.state.noArrowAt = noArrowAt.concat(valid[0].start);
          ({
            consequent,
            failed
          } = this.tryParseConditionalConsequent());
        }
      }
  
      this.getArrowLikeExpressions(consequent, true);
      this.state.noArrowAt = originalNoArrowAt;
      this.expect(types$1.colon);
      node.test = expr;
      node.consequent = consequent;
      node.alternate = this.forwardNoArrowParamsConversionAt(node, () => this.parseMaybeAssign(undefined, undefined));
      return this.finishNode(node, "ConditionalExpression");
    }
  
    tryParseConditionalConsequent() {
      this.state.noArrowParamsConversionAt.push(this.state.start);
      const consequent = this.parseMaybeAssignAllowIn();
      const failed = !this.match(types$1.colon);
      this.state.noArrowParamsConversionAt.pop();
      return {
        consequent,
        failed
      };
    }
  
    getArrowLikeExpressions(node, disallowInvalid) {
      const stack = [node];
      const arrows = [];
  
      while (stack.length !== 0) {
        const node = stack.pop();
  
        if (node.type === "ArrowFunctionExpression") {
          if (node.typeParameters || !node.returnType) {
            this.finishArrowValidation(node);
          } else {
            arrows.push(node);
          }
  
          stack.push(node.body);
        } else if (node.type === "ConditionalExpression") {
          stack.push(node.consequent);
          stack.push(node.alternate);
        }
      }
  
      if (disallowInvalid) {
        arrows.forEach(node => this.finishArrowValidation(node));
        return [arrows, []];
      }
  
      return partition(arrows, node => node.params.every(param => this.isAssignable(param, true)));
    }
  
    finishArrowValidation(node) {
      var _node$extra;
  
      this.toAssignableList(node.params, (_node$extra = node.extra) == null ? void 0 : _node$extra.trailingComma, false);
      this.scope.enter(SCOPE_FUNCTION | SCOPE_ARROW);
      super.checkParams(node, false, true);
      this.scope.exit();
    }
  
    forwardNoArrowParamsConversionAt(node, parse) {
      let result;
  
      if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
        this.state.noArrowParamsConversionAt.push(this.state.start);
        result = parse();
        this.state.noArrowParamsConversionAt.pop();
      } else {
        result = parse();
      }
  
      return result;
    }
  
    parseParenItem(node, startPos, startLoc) {
      node = super.parseParenItem(node, startPos, startLoc);
  
      if (this.eat(types$1.question)) {
        node.optional = true;
        this.resetEndLocation(node);
      }
  
      if (this.match(types$1.colon)) {
        const typeCastNode = this.startNodeAt(startPos, startLoc);
        typeCastNode.expression = node;
        typeCastNode.typeAnnotation = this.flowParseTypeAnnotation();
        return this.finishNode(typeCastNode, "TypeCastExpression");
      }
  
      return node;
    }
  
    assertModuleNodeAllowed(node) {
      if (node.type === "ImportDeclaration" && (node.importKind === "type" || node.importKind === "typeof") || node.type === "ExportNamedDeclaration" && node.exportKind === "type" || node.type === "ExportAllDeclaration" && node.exportKind === "type") {
        return;
      }
  
      super.assertModuleNodeAllowed(node);
    }
  
    parseExport(node) {
      const decl = super.parseExport(node);
  
      if (decl.type === "ExportNamedDeclaration" || decl.type === "ExportAllDeclaration") {
        decl.exportKind = decl.exportKind || "value";
      }
  
      return decl;
    }
  
    parseExportDeclaration(node) {
      if (this.isContextual("type")) {
        node.exportKind = "type";
        const declarationNode = this.startNode();
        this.next();
  
        if (this.match(types$1.braceL)) {
          node.specifiers = this.parseExportSpecifiers();
          this.parseExportFrom(node);
          return null;
        } else {
          return this.flowParseTypeAlias(declarationNode);
        }
      } else if (this.isContextual("opaque")) {
        node.exportKind = "type";
        const declarationNode = this.startNode();
        this.next();
        return this.flowParseOpaqueType(declarationNode, false);
      } else if (this.isContextual("interface")) {
        node.exportKind = "type";
        const declarationNode = this.startNode();
        this.next();
        return this.flowParseInterface(declarationNode);
      } else if (this.shouldParseEnums() && this.isContextual("enum")) {
        node.exportKind = "value";
        const declarationNode = this.startNode();
        this.next();
        return this.flowParseEnumDeclaration(declarationNode);
      } else {
        return super.parseExportDeclaration(node);
      }
    }
  
    eatExportStar(node) {
      if (super.eatExportStar(...arguments)) return true;
  
      if (this.isContextual("type") && this.lookahead().type === types$1.star) {
        node.exportKind = "type";
        this.next();
        this.next();
        return true;
      }
  
      return false;
    }
  
    maybeParseExportNamespaceSpecifier(node) {
      const pos = this.state.start;
      const hasNamespace = super.maybeParseExportNamespaceSpecifier(node);
  
      if (hasNamespace && node.exportKind === "type") {
        this.unexpected(pos);
      }
  
      return hasNamespace;
    }
  
    parseClassId(node, isStatement, optionalId) {
      super.parseClassId(node, isStatement, optionalId);
  
      if (this.isRelational("<")) {
        node.typeParameters = this.flowParseTypeParameterDeclaration();
      }
    }
  
    parseClassMember(classBody, member, state) {
      const pos = this.state.start;
  
      if (this.isContextual("declare")) {
        if (this.parseClassMemberFromModifier(classBody, member)) {
          return;
        }
  
        member.declare = true;
      }
  
      super.parseClassMember(classBody, member, state);
  
      if (member.declare) {
        if (member.type !== "ClassProperty" && member.type !== "ClassPrivateProperty" && member.type !== "PropertyDefinition") {
            this.raise(pos, FlowErrors.DeclareClassElement);
          } else if (member.value) {
          this.raise(member.value.start, FlowErrors.DeclareClassFieldInitializer);
        }
      }
    }
  
    isIterator(word) {
      return word === "iterator" || word === "asyncIterator";
    }
  
    readIterator() {
      const word = super.readWord1();
      const fullWord = "@@" + word;
  
      if (!this.isIterator(word) || !this.state.inType) {
        this.raise(this.state.pos, ErrorMessages.InvalidIdentifier, fullWord);
      }
  
      this.finishToken(types$1.name, fullWord);
    }
  
    getTokenFromCode(code) {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (code === 123 && next === 124) {
        return this.finishOp(types$1.braceBarL, 2);
      } else if (this.state.inType && (code === 62 || code === 60)) {
        return this.finishOp(types$1.relational, 1);
      } else if (this.state.inType && code === 63) {
        if (next === 46) {
          return this.finishOp(types$1.questionDot, 2);
        }
  
        return this.finishOp(types$1.question, 1);
      } else if (isIteratorStart(code, next)) {
        this.state.pos += 2;
        return this.readIterator();
      } else {
        return super.getTokenFromCode(code);
      }
    }
  
    isAssignable(node, isBinding) {
      switch (node.type) {
        case "Identifier":
        case "ObjectPattern":
        case "ArrayPattern":
        case "AssignmentPattern":
          return true;
  
        case "ObjectExpression":
          {
            const last = node.properties.length - 1;
            return node.properties.every((prop, i) => {
              return prop.type !== "ObjectMethod" && (i === last || prop.type === "SpreadElement") && this.isAssignable(prop);
            });
          }
  
        case "ObjectProperty":
          return this.isAssignable(node.value);
  
        case "SpreadElement":
          return this.isAssignable(node.argument);
  
        case "ArrayExpression":
          return node.elements.every(element => this.isAssignable(element));
  
        case "AssignmentExpression":
          return node.operator === "=";
  
        case "ParenthesizedExpression":
        case "TypeCastExpression":
          return this.isAssignable(node.expression);
  
        case "MemberExpression":
        case "OptionalMemberExpression":
          return !isBinding;
  
        default:
          return false;
      }
    }
  
    toAssignable(node, isLHS = false) {
      if (node.type === "TypeCastExpression") {
        return super.toAssignable(this.typeCastToParameter(node), isLHS);
      } else {
        return super.toAssignable(node, isLHS);
      }
    }
  
    toAssignableList(exprList, trailingCommaPos, isLHS) {
      for (let i = 0; i < exprList.length; i++) {
        const expr = exprList[i];
  
        if ((expr == null ? void 0 : expr.type) === "TypeCastExpression") {
          exprList[i] = this.typeCastToParameter(expr);
        }
      }
  
      return super.toAssignableList(exprList, trailingCommaPos, isLHS);
    }
  
    toReferencedList(exprList, isParenthesizedExpr) {
      for (let i = 0; i < exprList.length; i++) {
        var _expr$extra;
  
        const expr = exprList[i];
  
        if (expr && expr.type === "TypeCastExpression" && !((_expr$extra = expr.extra) != null && _expr$extra.parenthesized) && (exprList.length > 1 || !isParenthesizedExpr)) {
          this.raise(expr.typeAnnotation.start, FlowErrors.TypeCastInPattern);
        }
      }
  
      return exprList;
    }
  
    parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) {
      const node = super.parseArrayLike(close, canBePattern, isTuple, refExpressionErrors);
  
      if (canBePattern && !this.state.maybeInArrowParameters) {
        this.toReferencedList(node.elements);
      }
  
      return node;
    }
  
    checkLVal(expr, ...args) {
      if (expr.type !== "TypeCastExpression") {
        return super.checkLVal(expr, ...args);
      }
    }
  
    parseClassProperty(node) {
      if (this.match(types$1.colon)) {
        node.typeAnnotation = this.flowParseTypeAnnotation();
      }
  
      return super.parseClassProperty(node);
    }
  
    parseClassPrivateProperty(node) {
      if (this.match(types$1.colon)) {
        node.typeAnnotation = this.flowParseTypeAnnotation();
      }
  
      return super.parseClassPrivateProperty(node);
    }
  
    isClassMethod() {
      return this.isRelational("<") || super.isClassMethod();
    }
  
    isClassProperty() {
      return this.match(types$1.colon) || super.isClassProperty();
    }
  
    isNonstaticConstructor(method) {
      return !this.match(types$1.colon) && super.isNonstaticConstructor(method);
    }
  
    pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
      if (method.variance) {
        this.unexpected(method.variance.start);
      }
  
      delete method.variance;
  
      if (this.isRelational("<")) {
        method.typeParameters = this.flowParseTypeParameterDeclaration();
      }
  
      super.pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper);
  
      if (method.params && isConstructor) {
        const params = method.params;
  
        if (params.length > 0 && this.isThisParam(params[0])) {
          this.raise(method.start, FlowErrors.ThisParamBannedInConstructor);
        }
      } else if (method.type === "MethodDefinition" && isConstructor && method.value.params) {
        const params = method.value.params;
  
        if (params.length > 0 && this.isThisParam(params[0])) {
          this.raise(method.start, FlowErrors.ThisParamBannedInConstructor);
        }
      }
    }
  
    pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
      if (method.variance) {
        this.unexpected(method.variance.start);
      }
  
      delete method.variance;
  
      if (this.isRelational("<")) {
        method.typeParameters = this.flowParseTypeParameterDeclaration();
      }
  
      super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync);
    }
  
    parseClassSuper(node) {
      super.parseClassSuper(node);
  
      if (node.superClass && this.isRelational("<")) {
        node.superTypeParameters = this.flowParseTypeParameterInstantiation();
      }
  
      if (this.isContextual("implements")) {
        this.next();
        const implemented = node.implements = [];
  
        do {
          const node = this.startNode();
          node.id = this.flowParseRestrictedIdentifier(true);
  
          if (this.isRelational("<")) {
            node.typeParameters = this.flowParseTypeParameterInstantiation();
          } else {
            node.typeParameters = null;
          }
  
          implemented.push(this.finishNode(node, "ClassImplements"));
        } while (this.eat(types$1.comma));
      }
    }
  
    checkGetterSetterParams(method) {
      super.checkGetterSetterParams(method);
      const params = this.getObjectOrClassMethodParams(method);
  
      if (params.length > 0) {
        const param = params[0];
  
        if (this.isThisParam(param) && method.kind === "get") {
          this.raise(param.start, FlowErrors.GetterMayNotHaveThisParam);
        } else if (this.isThisParam(param)) {
          this.raise(param.start, FlowErrors.SetterMayNotHaveThisParam);
        }
      }
    }
  
    parsePropertyName(node, isPrivateNameAllowed) {
      const variance = this.flowParseVariance();
      const key = super.parsePropertyName(node, isPrivateNameAllowed);
      node.variance = variance;
      return key;
    }
  
    parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors) {
      if (prop.variance) {
        this.unexpected(prop.variance.start);
      }
  
      delete prop.variance;
      let typeParameters;
  
      if (this.isRelational("<") && !isAccessor) {
        typeParameters = this.flowParseTypeParameterDeclaration();
        if (!this.match(types$1.parenL)) this.unexpected();
      }
  
      super.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors);
  
      if (typeParameters) {
        (prop.value || prop).typeParameters = typeParameters;
      }
    }
  
    parseAssignableListItemTypes(param) {
      if (this.eat(types$1.question)) {
        if (param.type !== "Identifier") {
          this.raise(param.start, FlowErrors.OptionalBindingPattern);
        }
  
        if (this.isThisParam(param)) {
          this.raise(param.start, FlowErrors.ThisParamMayNotBeOptional);
        }
  
        param.optional = true;
      }
  
      if (this.match(types$1.colon)) {
        param.typeAnnotation = this.flowParseTypeAnnotation();
      } else if (this.isThisParam(param)) {
        this.raise(param.start, FlowErrors.ThisParamAnnotationRequired);
      }
  
      if (this.match(types$1.eq) && this.isThisParam(param)) {
        this.raise(param.start, FlowErrors.ThisParamNoDefault);
      }
  
      this.resetEndLocation(param);
      return param;
    }
  
    parseMaybeDefault(startPos, startLoc, left) {
      const node = super.parseMaybeDefault(startPos, startLoc, left);
  
      if (node.type === "AssignmentPattern" && node.typeAnnotation && node.right.start < node.typeAnnotation.start) {
        this.raise(node.typeAnnotation.start, FlowErrors.TypeBeforeInitializer);
      }
  
      return node;
    }
  
    shouldParseDefaultImport(node) {
      if (!hasTypeImportKind(node)) {
        return super.shouldParseDefaultImport(node);
      }
  
      return isMaybeDefaultImport(this.state);
    }
  
    parseImportSpecifierLocal(node, specifier, type, contextDescription) {
      specifier.local = hasTypeImportKind(node) ? this.flowParseRestrictedIdentifier(true, true) : this.parseIdentifier();
      this.checkLVal(specifier.local, contextDescription, BIND_LEXICAL);
      node.specifiers.push(this.finishNode(specifier, type));
    }
  
    maybeParseDefaultImportSpecifier(node) {
      node.importKind = "value";
      let kind = null;
  
      if (this.match(types$1._typeof)) {
        kind = "typeof";
      } else if (this.isContextual("type")) {
        kind = "type";
      }
  
      if (kind) {
        const lh = this.lookahead();
  
        if (kind === "type" && lh.type === types$1.star) {
          this.unexpected(lh.start);
        }
  
        if (isMaybeDefaultImport(lh) || lh.type === types$1.braceL || lh.type === types$1.star) {
          this.next();
          node.importKind = kind;
        }
      }
  
      return super.maybeParseDefaultImportSpecifier(node);
    }
  
    parseImportSpecifier(node) {
      const specifier = this.startNode();
      const firstIdentIsString = this.match(types$1.string);
      const firstIdent = this.parseModuleExportName();
      let specifierTypeKind = null;
  
      if (firstIdent.type === "Identifier") {
        if (firstIdent.name === "type") {
          specifierTypeKind = "type";
        } else if (firstIdent.name === "typeof") {
          specifierTypeKind = "typeof";
        }
      }
  
      let isBinding = false;
  
      if (this.isContextual("as") && !this.isLookaheadContextual("as")) {
        const as_ident = this.parseIdentifier(true);
  
        if (specifierTypeKind !== null && !this.match(types$1.name) && !this.state.type.keyword) {
          specifier.imported = as_ident;
          specifier.importKind = specifierTypeKind;
          specifier.local = as_ident.__clone();
        } else {
          specifier.imported = firstIdent;
          specifier.importKind = null;
          specifier.local = this.parseIdentifier();
        }
      } else if (specifierTypeKind !== null && (this.match(types$1.name) || this.state.type.keyword)) {
        specifier.imported = this.parseIdentifier(true);
        specifier.importKind = specifierTypeKind;
  
        if (this.eatContextual("as")) {
          specifier.local = this.parseIdentifier();
        } else {
          isBinding = true;
          specifier.local = specifier.imported.__clone();
        }
      } else {
        if (firstIdentIsString) {
          throw this.raise(specifier.start, ErrorMessages.ImportBindingIsString, firstIdent.value);
        }
  
        isBinding = true;
        specifier.imported = firstIdent;
        specifier.importKind = null;
        specifier.local = specifier.imported.__clone();
      }
  
      const nodeIsTypeImport = hasTypeImportKind(node);
      const specifierIsTypeImport = hasTypeImportKind(specifier);
  
      if (nodeIsTypeImport && specifierIsTypeImport) {
        this.raise(specifier.start, FlowErrors.ImportTypeShorthandOnlyInPureImport);
      }
  
      if (nodeIsTypeImport || specifierIsTypeImport) {
        this.checkReservedType(specifier.local.name, specifier.local.start, true);
      }
  
      if (isBinding && !nodeIsTypeImport && !specifierIsTypeImport) {
        this.checkReservedWord(specifier.local.name, specifier.start, true, true);
      }
  
      this.checkLVal(specifier.local, "import specifier", BIND_LEXICAL);
      node.specifiers.push(this.finishNode(specifier, "ImportSpecifier"));
    }
  
    parseBindingAtom() {
      switch (this.state.type) {
        case types$1._this:
          return this.parseIdentifier(true);
  
        default:
          return super.parseBindingAtom();
      }
    }
  
    parseFunctionParams(node, allowModifiers) {
      const kind = node.kind;
  
      if (kind !== "get" && kind !== "set" && this.isRelational("<")) {
        node.typeParameters = this.flowParseTypeParameterDeclaration();
      }
  
      super.parseFunctionParams(node, allowModifiers);
    }
  
    parseVarId(decl, kind) {
      super.parseVarId(decl, kind);
  
      if (this.match(types$1.colon)) {
        decl.id.typeAnnotation = this.flowParseTypeAnnotation();
        this.resetEndLocation(decl.id);
      }
    }
  
    parseAsyncArrowFromCallExpression(node, call) {
      if (this.match(types$1.colon)) {
        const oldNoAnonFunctionType = this.state.noAnonFunctionType;
        this.state.noAnonFunctionType = true;
        node.returnType = this.flowParseTypeAnnotation();
        this.state.noAnonFunctionType = oldNoAnonFunctionType;
      }
  
      return super.parseAsyncArrowFromCallExpression(node, call);
    }
  
    shouldParseAsyncArrow() {
      return this.match(types$1.colon) || super.shouldParseAsyncArrow();
    }
  
    parseMaybeAssign(refExpressionErrors, afterLeftParse) {
      var _jsx;
  
      let state = null;
      let jsx;
  
      if (this.hasPlugin("jsx") && (this.match(types$1.jsxTagStart) || this.isRelational("<"))) {
        state = this.state.clone();
        jsx = this.tryParse(() => super.parseMaybeAssign(refExpressionErrors, afterLeftParse), state);
        if (!jsx.error) return jsx.node;
        const {
          context
        } = this.state;
        const curContext = context[context.length - 1];
  
        if (curContext === types.j_oTag) {
          context.length -= 2;
        } else if (curContext === types.j_expr) {
          context.length -= 1;
        }
      }
  
      if ((_jsx = jsx) != null && _jsx.error || this.isRelational("<")) {
        var _jsx2, _jsx3;
  
        state = state || this.state.clone();
        let typeParameters;
        const arrow = this.tryParse(abort => {
          var _arrowExpression$extr;
  
          typeParameters = this.flowParseTypeParameterDeclaration();
          const arrowExpression = this.forwardNoArrowParamsConversionAt(typeParameters, () => {
            const result = super.parseMaybeAssign(refExpressionErrors, afterLeftParse);
            this.resetStartLocationFromNode(result, typeParameters);
            return result;
          });
  
          if (arrowExpression.type !== "ArrowFunctionExpression" && (_arrowExpression$extr = arrowExpression.extra) != null && _arrowExpression$extr.parenthesized) {
            abort();
          }
  
          const expr = this.maybeUnwrapTypeCastExpression(arrowExpression);
          expr.typeParameters = typeParameters;
          this.resetStartLocationFromNode(expr, typeParameters);
          return arrowExpression;
        }, state);
        let arrowExpression = null;
  
        if (arrow.node && this.maybeUnwrapTypeCastExpression(arrow.node).type === "ArrowFunctionExpression") {
          if (!arrow.error && !arrow.aborted) {
            if (arrow.node.async) {
              this.raise(typeParameters.start, FlowErrors.UnexpectedTypeParameterBeforeAsyncArrowFunction);
            }
  
            return arrow.node;
          }
  
          arrowExpression = arrow.node;
        }
  
        if ((_jsx2 = jsx) != null && _jsx2.node) {
          this.state = jsx.failState;
          return jsx.node;
        }
  
        if (arrowExpression) {
          this.state = arrow.failState;
          return arrowExpression;
        }
  
        if ((_jsx3 = jsx) != null && _jsx3.thrown) throw jsx.error;
        if (arrow.thrown) throw arrow.error;
        throw this.raise(typeParameters.start, FlowErrors.UnexpectedTokenAfterTypeParameter);
      }
  
      return super.parseMaybeAssign(refExpressionErrors, afterLeftParse);
    }
  
    parseArrow(node) {
      if (this.match(types$1.colon)) {
        const result = this.tryParse(() => {
          const oldNoAnonFunctionType = this.state.noAnonFunctionType;
          this.state.noAnonFunctionType = true;
          const typeNode = this.startNode();
          [typeNode.typeAnnotation, node.predicate] = this.flowParseTypeAndPredicateInitialiser();
          this.state.noAnonFunctionType = oldNoAnonFunctionType;
          if (this.canInsertSemicolon()) this.unexpected();
          if (!this.match(types$1.arrow)) this.unexpected();
          return typeNode;
        });
        if (result.thrown) return null;
        if (result.error) this.state = result.failState;
        node.returnType = result.node.typeAnnotation ? this.finishNode(result.node, "TypeAnnotation") : null;
      }
  
      return super.parseArrow(node);
    }
  
    shouldParseArrow() {
      return this.match(types$1.colon) || super.shouldParseArrow();
    }
  
    setArrowFunctionParameters(node, params) {
      if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
        node.params = params;
      } else {
        super.setArrowFunctionParameters(node, params);
      }
    }
  
    checkParams(node, allowDuplicates, isArrowFunction) {
      if (isArrowFunction && this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) {
        return;
      }
  
      for (let i = 0; i < node.params.length; i++) {
        if (this.isThisParam(node.params[i]) && i > 0) {
          this.raise(node.params[i].start, FlowErrors.ThisParamMustBeFirst);
        }
      }
  
      return super.checkParams(...arguments);
    }
  
    parseParenAndDistinguishExpression(canBeArrow) {
      return super.parseParenAndDistinguishExpression(canBeArrow && this.state.noArrowAt.indexOf(this.state.start) === -1);
    }
  
    parseSubscripts(base, startPos, startLoc, noCalls) {
      if (base.type === "Identifier" && base.name === "async" && this.state.noArrowAt.indexOf(startPos) !== -1) {
        this.next();
        const node = this.startNodeAt(startPos, startLoc);
        node.callee = base;
        node.arguments = this.parseCallExpressionArguments(types$1.parenR, false);
        base = this.finishNode(node, "CallExpression");
      } else if (base.type === "Identifier" && base.name === "async" && this.isRelational("<")) {
        const state = this.state.clone();
        const arrow = this.tryParse(abort => this.parseAsyncArrowWithTypeParameters(startPos, startLoc) || abort(), state);
        if (!arrow.error && !arrow.aborted) return arrow.node;
        const result = this.tryParse(() => super.parseSubscripts(base, startPos, startLoc, noCalls), state);
        if (result.node && !result.error) return result.node;
  
        if (arrow.node) {
          this.state = arrow.failState;
          return arrow.node;
        }
  
        if (result.node) {
          this.state = result.failState;
          return result.node;
        }
  
        throw arrow.error || result.error;
      }
  
      return super.parseSubscripts(base, startPos, startLoc, noCalls);
    }
  
    parseSubscript(base, startPos, startLoc, noCalls, subscriptState) {
      if (this.match(types$1.questionDot) && this.isLookaheadToken_lt()) {
        subscriptState.optionalChainMember = true;
  
        if (noCalls) {
          subscriptState.stop = true;
          return base;
        }
  
        this.next();
        const node = this.startNodeAt(startPos, startLoc);
        node.callee = base;
        node.typeArguments = this.flowParseTypeParameterInstantiation();
        this.expect(types$1.parenL);
        node.arguments = this.parseCallExpressionArguments(types$1.parenR, false);
        node.optional = true;
        return this.finishCallExpression(node, true);
      } else if (!noCalls && this.shouldParseTypes() && this.isRelational("<")) {
        const node = this.startNodeAt(startPos, startLoc);
        node.callee = base;
        const result = this.tryParse(() => {
          node.typeArguments = this.flowParseTypeParameterInstantiationCallOrNew();
          this.expect(types$1.parenL);
          node.arguments = this.parseCallExpressionArguments(types$1.parenR, false);
          if (subscriptState.optionalChainMember) node.optional = false;
          return this.finishCallExpression(node, subscriptState.optionalChainMember);
        });
  
        if (result.node) {
          if (result.error) this.state = result.failState;
          return result.node;
        }
      }
  
      return super.parseSubscript(base, startPos, startLoc, noCalls, subscriptState);
    }
  
    parseNewArguments(node) {
      let targs = null;
  
      if (this.shouldParseTypes() && this.isRelational("<")) {
        targs = this.tryParse(() => this.flowParseTypeParameterInstantiationCallOrNew()).node;
      }
  
      node.typeArguments = targs;
      super.parseNewArguments(node);
    }
  
    parseAsyncArrowWithTypeParameters(startPos, startLoc) {
      const node = this.startNodeAt(startPos, startLoc);
      this.parseFunctionParams(node);
      if (!this.parseArrow(node)) return;
      return this.parseArrowExpression(node, undefined, true);
    }
  
    readToken_mult_modulo(code) {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (code === 42 && next === 47 && this.state.hasFlowComment) {
        this.state.hasFlowComment = false;
        this.state.pos += 2;
        this.nextToken();
        return;
      }
  
      super.readToken_mult_modulo(code);
    }
  
    readToken_pipe_amp(code) {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (code === 124 && next === 125) {
        this.finishOp(types$1.braceBarR, 2);
        return;
      }
  
      super.readToken_pipe_amp(code);
    }
  
    parseTopLevel(file, program) {
      const fileNode = super.parseTopLevel(file, program);
  
      if (this.state.hasFlowComment) {
        this.raise(this.state.pos, FlowErrors.UnterminatedFlowComment);
      }
  
      return fileNode;
    }
  
    skipBlockComment() {
      if (this.hasPlugin("flowComments") && this.skipFlowComment()) {
        if (this.state.hasFlowComment) {
          this.unexpected(null, FlowErrors.NestedFlowComment);
        }
  
        this.hasFlowCommentCompletion();
        this.state.pos += this.skipFlowComment();
        this.state.hasFlowComment = true;
        return;
      }
  
      if (this.state.hasFlowComment) {
        const end = this.input.indexOf("*-/", this.state.pos += 2);
  
        if (end === -1) {
          throw this.raise(this.state.pos - 2, ErrorMessages.UnterminatedComment);
        }
  
        this.state.pos = end + 3;
        return;
      }
  
      return super.skipBlockComment();
    }
  
    skipFlowComment() {
      const {
        pos
      } = this.state;
      let shiftToFirstNonWhiteSpace = 2;
  
      while ([32, 9].includes(this.input.charCodeAt(pos + shiftToFirstNonWhiteSpace))) {
        shiftToFirstNonWhiteSpace++;
      }
  
      const ch2 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos);
      const ch3 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos + 1);
  
      if (ch2 === 58 && ch3 === 58) {
        return shiftToFirstNonWhiteSpace + 2;
      }
  
      if (this.input.slice(shiftToFirstNonWhiteSpace + pos, shiftToFirstNonWhiteSpace + pos + 12) === "flow-include") {
        return shiftToFirstNonWhiteSpace + 12;
      }
  
      if (ch2 === 58 && ch3 !== 58) {
        return shiftToFirstNonWhiteSpace;
      }
  
      return false;
    }
  
    hasFlowCommentCompletion() {
      const end = this.input.indexOf("*/", this.state.pos);
  
      if (end === -1) {
        throw this.raise(this.state.pos, ErrorMessages.UnterminatedComment);
      }
    }
  
    flowEnumErrorBooleanMemberNotInitialized(pos, {
      enumName,
      memberName
    }) {
      this.raise(pos, FlowErrors.EnumBooleanMemberNotInitialized, memberName, enumName);
    }
  
    flowEnumErrorInvalidMemberName(pos, {
      enumName,
      memberName
    }) {
      const suggestion = memberName[0].toUpperCase() + memberName.slice(1);
      this.raise(pos, FlowErrors.EnumInvalidMemberName, memberName, suggestion, enumName);
    }
  
    flowEnumErrorDuplicateMemberName(pos, {
      enumName,
      memberName
    }) {
      this.raise(pos, FlowErrors.EnumDuplicateMemberName, memberName, enumName);
    }
  
    flowEnumErrorInconsistentMemberValues(pos, {
      enumName
    }) {
      this.raise(pos, FlowErrors.EnumInconsistentMemberValues, enumName);
    }
  
    flowEnumErrorInvalidExplicitType(pos, {
      enumName,
      suppliedType
    }) {
      return this.raise(pos, suppliedType === null ? FlowErrors.EnumInvalidExplicitTypeUnknownSupplied : FlowErrors.EnumInvalidExplicitType, enumName, suppliedType);
    }
  
    flowEnumErrorInvalidMemberInitializer(pos, {
      enumName,
      explicitType,
      memberName
    }) {
      let message = null;
  
      switch (explicitType) {
        case "boolean":
        case "number":
        case "string":
          message = FlowErrors.EnumInvalidMemberInitializerPrimaryType;
          break;
  
        case "symbol":
          message = FlowErrors.EnumInvalidMemberInitializerSymbolType;
          break;
  
        default:
          message = FlowErrors.EnumInvalidMemberInitializerUnknownType;
      }
  
      return this.raise(pos, message, enumName, memberName, explicitType);
    }
  
    flowEnumErrorNumberMemberNotInitialized(pos, {
      enumName,
      memberName
    }) {
      this.raise(pos, FlowErrors.EnumNumberMemberNotInitialized, enumName, memberName);
    }
  
    flowEnumErrorStringMemberInconsistentlyInitailized(pos, {
      enumName
    }) {
      this.raise(pos, FlowErrors.EnumStringMemberInconsistentlyInitailized, enumName);
    }
  
    flowEnumMemberInit() {
      const startPos = this.state.start;
  
      const endOfInit = () => this.match(types$1.comma) || this.match(types$1.braceR);
  
      switch (this.state.type) {
        case types$1.num:
          {
            const literal = this.parseNumericLiteral(this.state.value);
  
            if (endOfInit()) {
              return {
                type: "number",
                pos: literal.start,
                value: literal
              };
            }
  
            return {
              type: "invalid",
              pos: startPos
            };
          }
  
        case types$1.string:
          {
            const literal = this.parseStringLiteral(this.state.value);
  
            if (endOfInit()) {
              return {
                type: "string",
                pos: literal.start,
                value: literal
              };
            }
  
            return {
              type: "invalid",
              pos: startPos
            };
          }
  
        case types$1._true:
        case types$1._false:
          {
            const literal = this.parseBooleanLiteral(this.match(types$1._true));
  
            if (endOfInit()) {
              return {
                type: "boolean",
                pos: literal.start,
                value: literal
              };
            }
  
            return {
              type: "invalid",
              pos: startPos
            };
          }
  
        default:
          return {
            type: "invalid",
            pos: startPos
          };
      }
    }
  
    flowEnumMemberRaw() {
      const pos = this.state.start;
      const id = this.parseIdentifier(true);
      const init = this.eat(types$1.eq) ? this.flowEnumMemberInit() : {
        type: "none",
        pos
      };
      return {
        id,
        init
      };
    }
  
    flowEnumCheckExplicitTypeMismatch(pos, context, expectedType) {
      const {
        explicitType
      } = context;
  
      if (explicitType === null) {
        return;
      }
  
      if (explicitType !== expectedType) {
        this.flowEnumErrorInvalidMemberInitializer(pos, context);
      }
    }
  
    flowEnumMembers({
      enumName,
      explicitType
    }) {
      const seenNames = new Set();
      const members = {
        booleanMembers: [],
        numberMembers: [],
        stringMembers: [],
        defaultedMembers: []
      };
      let hasUnknownMembers = false;
  
      while (!this.match(types$1.braceR)) {
        if (this.eat(types$1.ellipsis)) {
          hasUnknownMembers = true;
          break;
        }
  
        const memberNode = this.startNode();
        const {
          id,
          init
        } = this.flowEnumMemberRaw();
        const memberName = id.name;
  
        if (memberName === "") {
          continue;
        }
  
        if (/^[a-z]/.test(memberName)) {
          this.flowEnumErrorInvalidMemberName(id.start, {
            enumName,
            memberName
          });
        }
  
        if (seenNames.has(memberName)) {
          this.flowEnumErrorDuplicateMemberName(id.start, {
            enumName,
            memberName
          });
        }
  
        seenNames.add(memberName);
        const context = {
          enumName,
          explicitType,
          memberName
        };
        memberNode.id = id;
  
        switch (init.type) {
          case "boolean":
            {
              this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "boolean");
              memberNode.init = init.value;
              members.booleanMembers.push(this.finishNode(memberNode, "EnumBooleanMember"));
              break;
            }
  
          case "number":
            {
              this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "number");
              memberNode.init = init.value;
              members.numberMembers.push(this.finishNode(memberNode, "EnumNumberMember"));
              break;
            }
  
          case "string":
            {
              this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "string");
              memberNode.init = init.value;
              members.stringMembers.push(this.finishNode(memberNode, "EnumStringMember"));
              break;
            }
  
          case "invalid":
            {
              throw this.flowEnumErrorInvalidMemberInitializer(init.pos, context);
            }
  
          case "none":
            {
              switch (explicitType) {
                case "boolean":
                  this.flowEnumErrorBooleanMemberNotInitialized(init.pos, context);
                  break;
  
                case "number":
                  this.flowEnumErrorNumberMemberNotInitialized(init.pos, context);
                  break;
  
                default:
                  members.defaultedMembers.push(this.finishNode(memberNode, "EnumDefaultedMember"));
              }
            }
        }
  
        if (!this.match(types$1.braceR)) {
          this.expect(types$1.comma);
        }
      }
  
      return {
        members,
        hasUnknownMembers
      };
    }
  
    flowEnumStringMembers(initializedMembers, defaultedMembers, {
      enumName
    }) {
      if (initializedMembers.length === 0) {
        return defaultedMembers;
      } else if (defaultedMembers.length === 0) {
        return initializedMembers;
      } else if (defaultedMembers.length > initializedMembers.length) {
        for (const member of initializedMembers) {
          this.flowEnumErrorStringMemberInconsistentlyInitailized(member.start, {
            enumName
          });
        }
  
        return defaultedMembers;
      } else {
        for (const member of defaultedMembers) {
          this.flowEnumErrorStringMemberInconsistentlyInitailized(member.start, {
            enumName
          });
        }
  
        return initializedMembers;
      }
    }
  
    flowEnumParseExplicitType({
      enumName
    }) {
      if (this.eatContextual("of")) {
        if (!this.match(types$1.name)) {
          throw this.flowEnumErrorInvalidExplicitType(this.state.start, {
            enumName,
            suppliedType: null
          });
        }
  
        const {
          value
        } = this.state;
        this.next();
  
        if (value !== "boolean" && value !== "number" && value !== "string" && value !== "symbol") {
          this.flowEnumErrorInvalidExplicitType(this.state.start, {
            enumName,
            suppliedType: value
          });
        }
  
        return value;
      }
  
      return null;
    }
  
    flowEnumBody(node, {
      enumName,
      nameLoc
    }) {
      const explicitType = this.flowEnumParseExplicitType({
        enumName
      });
      this.expect(types$1.braceL);
      const {
        members,
        hasUnknownMembers
      } = this.flowEnumMembers({
        enumName,
        explicitType
      });
      node.hasUnknownMembers = hasUnknownMembers;
  
      switch (explicitType) {
        case "boolean":
          node.explicitType = true;
          node.members = members.booleanMembers;
          this.expect(types$1.braceR);
          return this.finishNode(node, "EnumBooleanBody");
  
        case "number":
          node.explicitType = true;
          node.members = members.numberMembers;
          this.expect(types$1.braceR);
          return this.finishNode(node, "EnumNumberBody");
  
        case "string":
          node.explicitType = true;
          node.members = this.flowEnumStringMembers(members.stringMembers, members.defaultedMembers, {
            enumName
          });
          this.expect(types$1.braceR);
          return this.finishNode(node, "EnumStringBody");
  
        case "symbol":
          node.members = members.defaultedMembers;
          this.expect(types$1.braceR);
          return this.finishNode(node, "EnumSymbolBody");
  
        default:
          {
            const empty = () => {
              node.members = [];
              this.expect(types$1.braceR);
              return this.finishNode(node, "EnumStringBody");
            };
  
            node.explicitType = false;
            const boolsLen = members.booleanMembers.length;
            const numsLen = members.numberMembers.length;
            const strsLen = members.stringMembers.length;
            const defaultedLen = members.defaultedMembers.length;
  
            if (!boolsLen && !numsLen && !strsLen && !defaultedLen) {
              return empty();
            } else if (!boolsLen && !numsLen) {
              node.members = this.flowEnumStringMembers(members.stringMembers, members.defaultedMembers, {
                enumName
              });
              this.expect(types$1.braceR);
              return this.finishNode(node, "EnumStringBody");
            } else if (!numsLen && !strsLen && boolsLen >= defaultedLen) {
              for (const member of members.defaultedMembers) {
                this.flowEnumErrorBooleanMemberNotInitialized(member.start, {
                  enumName,
                  memberName: member.id.name
                });
              }
  
              node.members = members.booleanMembers;
              this.expect(types$1.braceR);
              return this.finishNode(node, "EnumBooleanBody");
            } else if (!boolsLen && !strsLen && numsLen >= defaultedLen) {
              for (const member of members.defaultedMembers) {
                this.flowEnumErrorNumberMemberNotInitialized(member.start, {
                  enumName,
                  memberName: member.id.name
                });
              }
  
              node.members = members.numberMembers;
              this.expect(types$1.braceR);
              return this.finishNode(node, "EnumNumberBody");
            } else {
              this.flowEnumErrorInconsistentMemberValues(nameLoc, {
                enumName
              });
              return empty();
            }
          }
      }
    }
  
    flowParseEnumDeclaration(node) {
      const id = this.parseIdentifier();
      node.id = id;
      node.body = this.flowEnumBody(this.startNode(), {
        enumName: id.name,
        nameLoc: id.start
      });
      return this.finishNode(node, "EnumDeclaration");
    }
  
    isLookaheadToken_lt() {
      const next = this.nextTokenStart();
  
      if (this.input.charCodeAt(next) === 60) {
        const afterNext = this.input.charCodeAt(next + 1);
        return afterNext !== 60 && afterNext !== 61;
      }
  
      return false;
    }
  
    maybeUnwrapTypeCastExpression(node) {
      return node.type === "TypeCastExpression" ? node.expression : node;
    }
  
  });
  
  const entities = {
    quot: "\u0022",
    amp: "&",
    apos: "\u0027",
    lt: "<",
    gt: ">",
    nbsp: "\u00A0",
    iexcl: "\u00A1",
    cent: "\u00A2",
    pound: "\u00A3",
    curren: "\u00A4",
    yen: "\u00A5",
    brvbar: "\u00A6",
    sect: "\u00A7",
    uml: "\u00A8",
    copy: "\u00A9",
    ordf: "\u00AA",
    laquo: "\u00AB",
    not: "\u00AC",
    shy: "\u00AD",
    reg: "\u00AE",
    macr: "\u00AF",
    deg: "\u00B0",
    plusmn: "\u00B1",
    sup2: "\u00B2",
    sup3: "\u00B3",
    acute: "\u00B4",
    micro: "\u00B5",
    para: "\u00B6",
    middot: "\u00B7",
    cedil: "\u00B8",
    sup1: "\u00B9",
    ordm: "\u00BA",
    raquo: "\u00BB",
    frac14: "\u00BC",
    frac12: "\u00BD",
    frac34: "\u00BE",
    iquest: "\u00BF",
    Agrave: "\u00C0",
    Aacute: "\u00C1",
    Acirc: "\u00C2",
    Atilde: "\u00C3",
    Auml: "\u00C4",
    Aring: "\u00C5",
    AElig: "\u00C6",
    Ccedil: "\u00C7",
    Egrave: "\u00C8",
    Eacute: "\u00C9",
    Ecirc: "\u00CA",
    Euml: "\u00CB",
    Igrave: "\u00CC",
    Iacute: "\u00CD",
    Icirc: "\u00CE",
    Iuml: "\u00CF",
    ETH: "\u00D0",
    Ntilde: "\u00D1",
    Ograve: "\u00D2",
    Oacute: "\u00D3",
    Ocirc: "\u00D4",
    Otilde: "\u00D5",
    Ouml: "\u00D6",
    times: "\u00D7",
    Oslash: "\u00D8",
    Ugrave: "\u00D9",
    Uacute: "\u00DA",
    Ucirc: "\u00DB",
    Uuml: "\u00DC",
    Yacute: "\u00DD",
    THORN: "\u00DE",
    szlig: "\u00DF",
    agrave: "\u00E0",
    aacute: "\u00E1",
    acirc: "\u00E2",
    atilde: "\u00E3",
    auml: "\u00E4",
    aring: "\u00E5",
    aelig: "\u00E6",
    ccedil: "\u00E7",
    egrave: "\u00E8",
    eacute: "\u00E9",
    ecirc: "\u00EA",
    euml: "\u00EB",
    igrave: "\u00EC",
    iacute: "\u00ED",
    icirc: "\u00EE",
    iuml: "\u00EF",
    eth: "\u00F0",
    ntilde: "\u00F1",
    ograve: "\u00F2",
    oacute: "\u00F3",
    ocirc: "\u00F4",
    otilde: "\u00F5",
    ouml: "\u00F6",
    divide: "\u00F7",
    oslash: "\u00F8",
    ugrave: "\u00F9",
    uacute: "\u00FA",
    ucirc: "\u00FB",
    uuml: "\u00FC",
    yacute: "\u00FD",
    thorn: "\u00FE",
    yuml: "\u00FF",
    OElig: "\u0152",
    oelig: "\u0153",
    Scaron: "\u0160",
    scaron: "\u0161",
    Yuml: "\u0178",
    fnof: "\u0192",
    circ: "\u02C6",
    tilde: "\u02DC",
    Alpha: "\u0391",
    Beta: "\u0392",
    Gamma: "\u0393",
    Delta: "\u0394",
    Epsilon: "\u0395",
    Zeta: "\u0396",
    Eta: "\u0397",
    Theta: "\u0398",
    Iota: "\u0399",
    Kappa: "\u039A",
    Lambda: "\u039B",
    Mu: "\u039C",
    Nu: "\u039D",
    Xi: "\u039E",
    Omicron: "\u039F",
    Pi: "\u03A0",
    Rho: "\u03A1",
    Sigma: "\u03A3",
    Tau: "\u03A4",
    Upsilon: "\u03A5",
    Phi: "\u03A6",
    Chi: "\u03A7",
    Psi: "\u03A8",
    Omega: "\u03A9",
    alpha: "\u03B1",
    beta: "\u03B2",
    gamma: "\u03B3",
    delta: "\u03B4",
    epsilon: "\u03B5",
    zeta: "\u03B6",
    eta: "\u03B7",
    theta: "\u03B8",
    iota: "\u03B9",
    kappa: "\u03BA",
    lambda: "\u03BB",
    mu: "\u03BC",
    nu: "\u03BD",
    xi: "\u03BE",
    omicron: "\u03BF",
    pi: "\u03C0",
    rho: "\u03C1",
    sigmaf: "\u03C2",
    sigma: "\u03C3",
    tau: "\u03C4",
    upsilon: "\u03C5",
    phi: "\u03C6",
    chi: "\u03C7",
    psi: "\u03C8",
    omega: "\u03C9",
    thetasym: "\u03D1",
    upsih: "\u03D2",
    piv: "\u03D6",
    ensp: "\u2002",
    emsp: "\u2003",
    thinsp: "\u2009",
    zwnj: "\u200C",
    zwj: "\u200D",
    lrm: "\u200E",
    rlm: "\u200F",
    ndash: "\u2013",
    mdash: "\u2014",
    lsquo: "\u2018",
    rsquo: "\u2019",
    sbquo: "\u201A",
    ldquo: "\u201C",
    rdquo: "\u201D",
    bdquo: "\u201E",
    dagger: "\u2020",
    Dagger: "\u2021",
    bull: "\u2022",
    hellip: "\u2026",
    permil: "\u2030",
    prime: "\u2032",
    Prime: "\u2033",
    lsaquo: "\u2039",
    rsaquo: "\u203A",
    oline: "\u203E",
    frasl: "\u2044",
    euro: "\u20AC",
    image: "\u2111",
    weierp: "\u2118",
    real: "\u211C",
    trade: "\u2122",
    alefsym: "\u2135",
    larr: "\u2190",
    uarr: "\u2191",
    rarr: "\u2192",
    darr: "\u2193",
    harr: "\u2194",
    crarr: "\u21B5",
    lArr: "\u21D0",
    uArr: "\u21D1",
    rArr: "\u21D2",
    dArr: "\u21D3",
    hArr: "\u21D4",
    forall: "\u2200",
    part: "\u2202",
    exist: "\u2203",
    empty: "\u2205",
    nabla: "\u2207",
    isin: "\u2208",
    notin: "\u2209",
    ni: "\u220B",
    prod: "\u220F",
    sum: "\u2211",
    minus: "\u2212",
    lowast: "\u2217",
    radic: "\u221A",
    prop: "\u221D",
    infin: "\u221E",
    ang: "\u2220",
    and: "\u2227",
    or: "\u2228",
    cap: "\u2229",
    cup: "\u222A",
    int: "\u222B",
    there4: "\u2234",
    sim: "\u223C",
    cong: "\u2245",
    asymp: "\u2248",
    ne: "\u2260",
    equiv: "\u2261",
    le: "\u2264",
    ge: "\u2265",
    sub: "\u2282",
    sup: "\u2283",
    nsub: "\u2284",
    sube: "\u2286",
    supe: "\u2287",
    oplus: "\u2295",
    otimes: "\u2297",
    perp: "\u22A5",
    sdot: "\u22C5",
    lceil: "\u2308",
    rceil: "\u2309",
    lfloor: "\u230A",
    rfloor: "\u230B",
    lang: "\u2329",
    rang: "\u232A",
    loz: "\u25CA",
    spades: "\u2660",
    clubs: "\u2663",
    hearts: "\u2665",
    diams: "\u2666"
  };
  
  class State {
    constructor() {
      this.strict = void 0;
      this.curLine = void 0;
      this.startLoc = void 0;
      this.endLoc = void 0;
      this.errors = [];
      this.potentialArrowAt = -1;
      this.noArrowAt = [];
      this.noArrowParamsConversionAt = [];
      this.maybeInArrowParameters = false;
      this.inPipeline = false;
      this.inType = false;
      this.noAnonFunctionType = false;
      this.inPropertyName = false;
      this.hasFlowComment = false;
      this.isAmbientContext = false;
      this.inAbstractClass = false;
      this.topicContext = {
        maxNumOfResolvableTopics: 0,
        maxTopicIndex: null
      };
      this.soloAwait = false;
      this.inFSharpPipelineDirectBody = false;
      this.labels = [];
      this.decoratorStack = [[]];
      this.comments = [];
      this.commentStack = [];
      this.pos = 0;
      this.lineStart = 0;
      this.type = types$1.eof;
      this.value = null;
      this.start = 0;
      this.end = 0;
      this.lastTokEndLoc = null;
      this.lastTokStartLoc = null;
      this.lastTokStart = 0;
      this.lastTokEnd = 0;
      this.context = [types.brace];
      this.exprAllowed = true;
      this.containsEsc = false;
      this.strictErrors = new Map();
      this.tokensLength = 0;
    }
  
    init(options) {
      this.strict = options.strictMode === false ? false : options.strictMode === true ? true : options.sourceType === "module";
      this.curLine = options.startLine;
      this.startLoc = this.endLoc = this.curPosition();
    }
  
    curPosition() {
      return new Position(this.curLine, this.pos - this.lineStart);
    }
  
    clone(skipArrays) {
      const state = new State();
      const keys = Object.keys(this);
  
      for (let i = 0, length = keys.length; i < length; i++) {
        const key = keys[i];
        let val = this[key];
  
        if (!skipArrays && Array.isArray(val)) {
          val = val.slice();
        }
  
        state[key] = val;
      }
  
      return state;
    }
  
  }
  
  const HEX_NUMBER = /^[\da-fA-F]+$/;
  const DECIMAL_NUMBER = /^\d+$/;
  const JsxErrors = makeErrorTemplates({
    AttributeIsEmpty: "JSX attributes must only be assigned a non-empty expression.",
    MissingClosingTagElement: "Expected corresponding JSX closing tag for <%0>.",
    MissingClosingTagFragment: "Expected corresponding JSX closing tag for <>.",
    UnexpectedSequenceExpression: "Sequence expressions cannot be directly nested inside JSX. Did you mean to wrap it in parentheses (...)?",
    UnsupportedJsxValue: "JSX value should be either an expression or a quoted JSX text.",
    UnterminatedJsxContent: "Unterminated JSX contents.",
    UnwrappedAdjacentJSXElements: "Adjacent JSX elements must be wrapped in an enclosing tag. Did you want a JSX fragment <>...</>?"
  }, ErrorCodes.SyntaxError);
  types.j_oTag = new TokContext("<tag");
  types.j_cTag = new TokContext("</tag");
  types.j_expr = new TokContext("<tag>...</tag>", true);
  types$1.jsxName = new TokenType("jsxName");
  types$1.jsxText = new TokenType("jsxText", {
    beforeExpr: true
  });
  types$1.jsxTagStart = new TokenType("jsxTagStart", {
    startsExpr: true
  });
  types$1.jsxTagEnd = new TokenType("jsxTagEnd");
  
  types$1.jsxTagStart.updateContext = context => {
    context.push(types.j_expr, types.j_oTag);
  };
  
  function isFragment(object) {
    return object ? object.type === "JSXOpeningFragment" || object.type === "JSXClosingFragment" : false;
  }
  
  function getQualifiedJSXName(object) {
    if (object.type === "JSXIdentifier") {
      return object.name;
    }
  
    if (object.type === "JSXNamespacedName") {
      return object.namespace.name + ":" + object.name.name;
    }
  
    if (object.type === "JSXMemberExpression") {
      return getQualifiedJSXName(object.object) + "." + getQualifiedJSXName(object.property);
    }
  
    throw new Error("Node had unexpected type: " + object.type);
  }
  
  var jsx = (superClass => class extends superClass {
    jsxReadToken() {
      let out = "";
      let chunkStart = this.state.pos;
  
      for (;;) {
        if (this.state.pos >= this.length) {
          throw this.raise(this.state.start, JsxErrors.UnterminatedJsxContent);
        }
  
        const ch = this.input.charCodeAt(this.state.pos);
  
        switch (ch) {
          case 60:
          case 123:
            if (this.state.pos === this.state.start) {
              if (ch === 60 && this.state.exprAllowed) {
                ++this.state.pos;
                return this.finishToken(types$1.jsxTagStart);
              }
  
              return super.getTokenFromCode(ch);
            }
  
            out += this.input.slice(chunkStart, this.state.pos);
            return this.finishToken(types$1.jsxText, out);
  
          case 38:
            out += this.input.slice(chunkStart, this.state.pos);
            out += this.jsxReadEntity();
            chunkStart = this.state.pos;
            break;
  
          case 62:
          case 125:
  
          default:
            if (isNewLine(ch)) {
              out += this.input.slice(chunkStart, this.state.pos);
              out += this.jsxReadNewLine(true);
              chunkStart = this.state.pos;
            } else {
              ++this.state.pos;
            }
  
        }
      }
    }
  
    jsxReadNewLine(normalizeCRLF) {
      const ch = this.input.charCodeAt(this.state.pos);
      let out;
      ++this.state.pos;
  
      if (ch === 13 && this.input.charCodeAt(this.state.pos) === 10) {
        ++this.state.pos;
        out = normalizeCRLF ? "\n" : "\r\n";
      } else {
        out = String.fromCharCode(ch);
      }
  
      ++this.state.curLine;
      this.state.lineStart = this.state.pos;
      return out;
    }
  
    jsxReadString(quote) {
      let out = "";
      let chunkStart = ++this.state.pos;
  
      for (;;) {
        if (this.state.pos >= this.length) {
          throw this.raise(this.state.start, ErrorMessages.UnterminatedString);
        }
  
        const ch = this.input.charCodeAt(this.state.pos);
        if (ch === quote) break;
  
        if (ch === 38) {
          out += this.input.slice(chunkStart, this.state.pos);
          out += this.jsxReadEntity();
          chunkStart = this.state.pos;
        } else if (isNewLine(ch)) {
          out += this.input.slice(chunkStart, this.state.pos);
          out += this.jsxReadNewLine(false);
          chunkStart = this.state.pos;
        } else {
          ++this.state.pos;
        }
      }
  
      out += this.input.slice(chunkStart, this.state.pos++);
      return this.finishToken(types$1.string, out);
    }
  
    jsxReadEntity() {
      let str = "";
      let count = 0;
      let entity;
      let ch = this.input[this.state.pos];
      const startPos = ++this.state.pos;
  
      while (this.state.pos < this.length && count++ < 10) {
        ch = this.input[this.state.pos++];
  
        if (ch === ";") {
          if (str[0] === "#") {
            if (str[1] === "x") {
              str = str.substr(2);
  
              if (HEX_NUMBER.test(str)) {
                entity = String.fromCodePoint(parseInt(str, 16));
              }
            } else {
              str = str.substr(1);
  
              if (DECIMAL_NUMBER.test(str)) {
                entity = String.fromCodePoint(parseInt(str, 10));
              }
            }
          } else {
            entity = entities[str];
          }
  
          break;
        }
  
        str += ch;
      }
  
      if (!entity) {
        this.state.pos = startPos;
        return "&";
      }
  
      return entity;
    }
  
    jsxReadWord() {
      let ch;
      const start = this.state.pos;
  
      do {
        ch = this.input.charCodeAt(++this.state.pos);
      } while (isIdentifierChar(ch) || ch === 45);
  
      return this.finishToken(types$1.jsxName, this.input.slice(start, this.state.pos));
    }
  
    jsxParseIdentifier() {
      const node = this.startNode();
  
      if (this.match(types$1.jsxName)) {
        node.name = this.state.value;
      } else if (this.state.type.keyword) {
        node.name = this.state.type.keyword;
      } else {
        this.unexpected();
      }
  
      this.next();
      return this.finishNode(node, "JSXIdentifier");
    }
  
    jsxParseNamespacedName() {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const name = this.jsxParseIdentifier();
      if (!this.eat(types$1.colon)) return name;
      const node = this.startNodeAt(startPos, startLoc);
      node.namespace = name;
      node.name = this.jsxParseIdentifier();
      return this.finishNode(node, "JSXNamespacedName");
    }
  
    jsxParseElementName() {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      let node = this.jsxParseNamespacedName();
  
      if (node.type === "JSXNamespacedName") {
        return node;
      }
  
      while (this.eat(types$1.dot)) {
        const newNode = this.startNodeAt(startPos, startLoc);
        newNode.object = node;
        newNode.property = this.jsxParseIdentifier();
        node = this.finishNode(newNode, "JSXMemberExpression");
      }
  
      return node;
    }
  
    jsxParseAttributeValue() {
      let node;
  
      switch (this.state.type) {
        case types$1.braceL:
          node = this.startNode();
          this.next();
          node = this.jsxParseExpressionContainer(node);
  
          if (node.expression.type === "JSXEmptyExpression") {
            this.raise(node.start, JsxErrors.AttributeIsEmpty);
          }
  
          return node;
  
        case types$1.jsxTagStart:
        case types$1.string:
          return this.parseExprAtom();
  
        default:
          throw this.raise(this.state.start, JsxErrors.UnsupportedJsxValue);
      }
    }
  
    jsxParseEmptyExpression() {
      const node = this.startNodeAt(this.state.lastTokEnd, this.state.lastTokEndLoc);
      return this.finishNodeAt(node, "JSXEmptyExpression", this.state.start, this.state.startLoc);
    }
  
    jsxParseSpreadChild(node) {
      this.next();
      node.expression = this.parseExpression();
      this.expect(types$1.braceR);
      return this.finishNode(node, "JSXSpreadChild");
    }
  
    jsxParseExpressionContainer(node) {
      if (this.match(types$1.braceR)) {
        node.expression = this.jsxParseEmptyExpression();
      } else {
        const expression = this.parseExpression();
        node.expression = expression;
      }
  
      this.expect(types$1.braceR);
      return this.finishNode(node, "JSXExpressionContainer");
    }
  
    jsxParseAttribute() {
      const node = this.startNode();
  
      if (this.eat(types$1.braceL)) {
        this.expect(types$1.ellipsis);
        node.argument = this.parseMaybeAssignAllowIn();
        this.expect(types$1.braceR);
        return this.finishNode(node, "JSXSpreadAttribute");
      }
  
      node.name = this.jsxParseNamespacedName();
      node.value = this.eat(types$1.eq) ? this.jsxParseAttributeValue() : null;
      return this.finishNode(node, "JSXAttribute");
    }
  
    jsxParseOpeningElementAt(startPos, startLoc) {
      const node = this.startNodeAt(startPos, startLoc);
  
      if (this.match(types$1.jsxTagEnd)) {
        this.expect(types$1.jsxTagEnd);
        return this.finishNode(node, "JSXOpeningFragment");
      }
  
      node.name = this.jsxParseElementName();
      return this.jsxParseOpeningElementAfterName(node);
    }
  
    jsxParseOpeningElementAfterName(node) {
      const attributes = [];
  
      while (!this.match(types$1.slash) && !this.match(types$1.jsxTagEnd)) {
        attributes.push(this.jsxParseAttribute());
      }
  
      node.attributes = attributes;
      node.selfClosing = this.eat(types$1.slash);
      this.expect(types$1.jsxTagEnd);
      return this.finishNode(node, "JSXOpeningElement");
    }
  
    jsxParseClosingElementAt(startPos, startLoc) {
      const node = this.startNodeAt(startPos, startLoc);
  
      if (this.match(types$1.jsxTagEnd)) {
        this.expect(types$1.jsxTagEnd);
        return this.finishNode(node, "JSXClosingFragment");
      }
  
      node.name = this.jsxParseElementName();
      this.expect(types$1.jsxTagEnd);
      return this.finishNode(node, "JSXClosingElement");
    }
  
    jsxParseElementAt(startPos, startLoc) {
      const node = this.startNodeAt(startPos, startLoc);
      const children = [];
      const openingElement = this.jsxParseOpeningElementAt(startPos, startLoc);
      let closingElement = null;
  
      if (!openingElement.selfClosing) {
        contents: for (;;) {
          switch (this.state.type) {
            case types$1.jsxTagStart:
              startPos = this.state.start;
              startLoc = this.state.startLoc;
              this.next();
  
              if (this.eat(types$1.slash)) {
                closingElement = this.jsxParseClosingElementAt(startPos, startLoc);
                break contents;
              }
  
              children.push(this.jsxParseElementAt(startPos, startLoc));
              break;
  
            case types$1.jsxText:
              children.push(this.parseExprAtom());
              break;
  
            case types$1.braceL:
              {
                const node = this.startNode();
                this.next();
  
                if (this.match(types$1.ellipsis)) {
                  children.push(this.jsxParseSpreadChild(node));
                } else {
                  children.push(this.jsxParseExpressionContainer(node));
                }
  
                break;
              }
  
            default:
              throw this.unexpected();
          }
        }
  
        if (isFragment(openingElement) && !isFragment(closingElement)) {
          this.raise(closingElement.start, JsxErrors.MissingClosingTagFragment);
        } else if (!isFragment(openingElement) && isFragment(closingElement)) {
          this.raise(closingElement.start, JsxErrors.MissingClosingTagElement, getQualifiedJSXName(openingElement.name));
        } else if (!isFragment(openingElement) && !isFragment(closingElement)) {
          if (getQualifiedJSXName(closingElement.name) !== getQualifiedJSXName(openingElement.name)) {
            this.raise(closingElement.start, JsxErrors.MissingClosingTagElement, getQualifiedJSXName(openingElement.name));
          }
        }
      }
  
      if (isFragment(openingElement)) {
        node.openingFragment = openingElement;
        node.closingFragment = closingElement;
      } else {
        node.openingElement = openingElement;
        node.closingElement = closingElement;
      }
  
      node.children = children;
  
      if (this.isRelational("<")) {
        throw this.raise(this.state.start, JsxErrors.UnwrappedAdjacentJSXElements);
      }
  
      return isFragment(openingElement) ? this.finishNode(node, "JSXFragment") : this.finishNode(node, "JSXElement");
    }
  
    jsxParseElement() {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      this.next();
      return this.jsxParseElementAt(startPos, startLoc);
    }
  
    parseExprAtom(refExpressionErrors) {
      if (this.match(types$1.jsxText)) {
        return this.parseLiteral(this.state.value, "JSXText");
      } else if (this.match(types$1.jsxTagStart)) {
        return this.jsxParseElement();
      } else if (this.isRelational("<") && this.input.charCodeAt(this.state.pos) !== 33) {
        this.finishToken(types$1.jsxTagStart);
        return this.jsxParseElement();
      } else {
        return super.parseExprAtom(refExpressionErrors);
      }
    }
  
    createLookaheadState(state) {
      const lookaheadState = super.createLookaheadState(state);
      lookaheadState.inPropertyName = state.inPropertyName;
      return lookaheadState;
    }
  
    getTokenFromCode(code) {
      if (this.state.inPropertyName) return super.getTokenFromCode(code);
      const context = this.curContext();
  
      if (context === types.j_expr) {
        return this.jsxReadToken();
      }
  
      if (context === types.j_oTag || context === types.j_cTag) {
        if (isIdentifierStart(code)) {
          return this.jsxReadWord();
        }
  
        if (code === 62) {
          ++this.state.pos;
          return this.finishToken(types$1.jsxTagEnd);
        }
  
        if ((code === 34 || code === 39) && context === types.j_oTag) {
          return this.jsxReadString(code);
        }
      }
  
      if (code === 60 && this.state.exprAllowed && this.input.charCodeAt(this.state.pos + 1) !== 33) {
        ++this.state.pos;
        return this.finishToken(types$1.jsxTagStart);
      }
  
      return super.getTokenFromCode(code);
    }
  
    updateContext(prevType) {
      super.updateContext(prevType);
      const {
        context,
        type
      } = this.state;
  
      if (type === types$1.slash && prevType === types$1.jsxTagStart) {
        context.splice(-2, 2, types.j_cTag);
        this.state.exprAllowed = false;
      } else if (type === types$1.jsxTagEnd) {
        const out = context.pop();
  
        if (out === types.j_oTag && prevType === types$1.slash || out === types.j_cTag) {
          context.pop();
          this.state.exprAllowed = context[context.length - 1] === types.j_expr;
        } else {
          this.state.exprAllowed = true;
        }
      } else if (type.keyword && (prevType === types$1.dot || prevType === types$1.questionDot)) {
        this.state.exprAllowed = false;
      } else {
        this.state.exprAllowed = type.beforeExpr;
      }
    }
  
  });
  
  class TypeScriptScope extends Scope {
    constructor(...args) {
      super(...args);
      this.types = new Set();
      this.enums = new Set();
      this.constEnums = new Set();
      this.classes = new Set();
      this.exportOnlyBindings = new Set();
    }
  
  }
  
  class TypeScriptScopeHandler extends ScopeHandler {
    createScope(flags) {
      return new TypeScriptScope(flags);
    }
  
    declareName(name, bindingType, pos) {
      const scope = this.currentScope();
  
      if (bindingType & BIND_FLAGS_TS_EXPORT_ONLY) {
        this.maybeExportDefined(scope, name);
        scope.exportOnlyBindings.add(name);
        return;
      }
  
      super.declareName(...arguments);
  
      if (bindingType & BIND_KIND_TYPE) {
        if (!(bindingType & BIND_KIND_VALUE)) {
          this.checkRedeclarationInScope(scope, name, bindingType, pos);
          this.maybeExportDefined(scope, name);
        }
  
        scope.types.add(name);
      }
  
      if (bindingType & BIND_FLAGS_TS_ENUM) scope.enums.add(name);
      if (bindingType & BIND_FLAGS_TS_CONST_ENUM) scope.constEnums.add(name);
      if (bindingType & BIND_FLAGS_CLASS) scope.classes.add(name);
    }
  
    isRedeclaredInScope(scope, name, bindingType) {
      if (scope.enums.has(name)) {
        if (bindingType & BIND_FLAGS_TS_ENUM) {
          const isConst = !!(bindingType & BIND_FLAGS_TS_CONST_ENUM);
          const wasConst = scope.constEnums.has(name);
          return isConst !== wasConst;
        }
  
        return true;
      }
  
      if (bindingType & BIND_FLAGS_CLASS && scope.classes.has(name)) {
        if (scope.lexical.has(name)) {
          return !!(bindingType & BIND_KIND_VALUE);
        } else {
          return false;
        }
      }
  
      if (bindingType & BIND_KIND_TYPE && scope.types.has(name)) {
        return true;
      }
  
      return super.isRedeclaredInScope(...arguments);
    }
  
    checkLocalExport(id) {
      const topLevelScope = this.scopeStack[0];
      const {
        name
      } = id;
  
      if (!topLevelScope.types.has(name) && !topLevelScope.exportOnlyBindings.has(name)) {
        super.checkLocalExport(id);
      }
    }
  
  }
  
  const PARAM = 0b0000,
        PARAM_YIELD = 0b0001,
        PARAM_AWAIT = 0b0010,
        PARAM_RETURN = 0b0100,
        PARAM_IN = 0b1000;
  class ProductionParameterHandler {
    constructor() {
      this.stacks = [];
    }
  
    enter(flags) {
      this.stacks.push(flags);
    }
  
    exit() {
      this.stacks.pop();
    }
  
    currentFlags() {
      return this.stacks[this.stacks.length - 1];
    }
  
    get hasAwait() {
      return (this.currentFlags() & PARAM_AWAIT) > 0;
    }
  
    get hasYield() {
      return (this.currentFlags() & PARAM_YIELD) > 0;
    }
  
    get hasReturn() {
      return (this.currentFlags() & PARAM_RETURN) > 0;
    }
  
    get hasIn() {
      return (this.currentFlags() & PARAM_IN) > 0;
    }
  
  }
  function functionFlags(isAsync, isGenerator) {
    return (isAsync ? PARAM_AWAIT : 0) | (isGenerator ? PARAM_YIELD : 0);
  }
  
  function nonNull(x) {
    if (x == null) {
      throw new Error(`Unexpected ${x} value.`);
    }
  
    return x;
  }
  
  function assert(x) {
    if (!x) {
      throw new Error("Assert fail");
    }
  }
  
  const TSErrors = makeErrorTemplates({
    AbstractMethodHasImplementation: "Method '%0' cannot have an implementation because it is marked abstract.",
    AccesorCannotDeclareThisParameter: "'get' and 'set' accessors cannot declare 'this' parameters.",
    AccesorCannotHaveTypeParameters: "An accessor cannot have type parameters.",
    ClassMethodHasDeclare: "Class methods cannot have the 'declare' modifier.",
    ClassMethodHasReadonly: "Class methods cannot have the 'readonly' modifier.",
    ConstructorHasTypeParameters: "Type parameters cannot appear on a constructor declaration.",
    DeclareAccessor: "'declare' is not allowed in %0ters.",
    DeclareClassFieldHasInitializer: "Initializers are not allowed in ambient contexts.",
    DeclareFunctionHasImplementation: "An implementation cannot be declared in ambient contexts.",
    DuplicateAccessibilityModifier: "Accessibility modifier already seen.",
    DuplicateModifier: "Duplicate modifier: '%0'.",
    EmptyHeritageClauseType: "'%0' list cannot be empty.",
    EmptyTypeArguments: "Type argument list cannot be empty.",
    EmptyTypeParameters: "Type parameter list cannot be empty.",
    ExpectedAmbientAfterExportDeclare: "'export declare' must be followed by an ambient declaration.",
    ImportAliasHasImportType: "An import alias can not use 'import type'.",
    IncompatibleModifiers: "'%0' modifier cannot be used with '%1' modifier.",
    IndexSignatureHasAbstract: "Index signatures cannot have the 'abstract' modifier.",
    IndexSignatureHasAccessibility: "Index signatures cannot have an accessibility modifier ('%0').",
    IndexSignatureHasDeclare: "Index signatures cannot have the 'declare' modifier.",
    IndexSignatureHasOverride: "'override' modifier cannot appear on an index signature.",
    IndexSignatureHasStatic: "Index signatures cannot have the 'static' modifier.",
    InvalidModifierOnTypeMember: "'%0' modifier cannot appear on a type member.",
    InvalidModifiersOrder: "'%0' modifier must precede '%1' modifier.",
    InvalidTupleMemberLabel: "Tuple members must be labeled with a simple identifier.",
    MixedLabeledAndUnlabeledElements: "Tuple members must all have names or all not have names.",
    NonAbstractClassHasAbstractMethod: "Abstract methods can only appear within an abstract class.",
    NonClassMethodPropertyHasAbstractModifer: "'abstract' modifier can only appear on a class, method, or property declaration.",
    OptionalTypeBeforeRequired: "A required element cannot follow an optional element.",
    OverrideNotInSubClass: "This member cannot have an 'override' modifier because its containing class does not extend another class.",
    PatternIsOptional: "A binding pattern parameter cannot be optional in an implementation signature.",
    PrivateElementHasAbstract: "Private elements cannot have the 'abstract' modifier.",
    PrivateElementHasAccessibility: "Private elements cannot have an accessibility modifier ('%0').",
    ReadonlyForMethodSignature: "'readonly' modifier can only appear on a property declaration or index signature.",
    SetAccesorCannotHaveOptionalParameter: "A 'set' accessor cannot have an optional parameter.",
    SetAccesorCannotHaveRestParameter: "A 'set' accessor cannot have rest parameter.",
    SetAccesorCannotHaveReturnType: "A 'set' accessor cannot have a return type annotation.",
    StaticBlockCannotHaveModifier: "Static class blocks cannot have any modifier.",
    TypeAnnotationAfterAssign: "Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`.",
    TypeImportCannotSpecifyDefaultAndNamed: "A type-only import can specify a default import or named bindings, but not both.",
    UnexpectedParameterModifier: "A parameter property is only allowed in a constructor implementation.",
    UnexpectedReadonly: "'readonly' type modifier is only permitted on array and tuple literal types.",
    UnexpectedTypeAnnotation: "Did not expect a type annotation here.",
    UnexpectedTypeCastInParameter: "Unexpected type cast in parameter position.",
    UnsupportedImportTypeArgument: "Argument in a type import must be a string literal.",
    UnsupportedParameterPropertyKind: "A parameter property may not be declared using a binding pattern.",
    UnsupportedSignatureParameterKind: "Name in a signature must be an Identifier, ObjectPattern or ArrayPattern, instead got %0."
  }, ErrorCodes.SyntaxError);
  
  function keywordTypeFromName(value) {
    switch (value) {
      case "any":
        return "TSAnyKeyword";
  
      case "boolean":
        return "TSBooleanKeyword";
  
      case "bigint":
        return "TSBigIntKeyword";
  
      case "never":
        return "TSNeverKeyword";
  
      case "number":
        return "TSNumberKeyword";
  
      case "object":
        return "TSObjectKeyword";
  
      case "string":
        return "TSStringKeyword";
  
      case "symbol":
        return "TSSymbolKeyword";
  
      case "undefined":
        return "TSUndefinedKeyword";
  
      case "unknown":
        return "TSUnknownKeyword";
  
      default:
        return undefined;
    }
  }
  
  function tsIsAccessModifier(modifier) {
    return modifier === "private" || modifier === "public" || modifier === "protected";
  }
  
  var typescript = (superClass => class extends superClass {
    getScopeHandler() {
      return TypeScriptScopeHandler;
    }
  
    tsIsIdentifier() {
      return this.match(types$1.name);
    }
  
    tsTokenCanFollowModifier() {
      return (this.match(types$1.bracketL) || this.match(types$1.braceL) || this.match(types$1.star) || this.match(types$1.ellipsis) || this.match(types$1.privateName) || this.isLiteralPropertyName()) && !this.hasPrecedingLineBreak();
    }
  
    tsNextTokenCanFollowModifier() {
      this.next();
      return this.tsTokenCanFollowModifier();
    }
  
    tsParseModifier(allowedModifiers) {
      if (!this.match(types$1.name)) {
        return undefined;
      }
  
      const modifier = this.state.value;
  
      if (allowedModifiers.indexOf(modifier) !== -1 && this.tsTryParse(this.tsNextTokenCanFollowModifier.bind(this))) {
        return modifier;
      }
  
      return undefined;
    }
  
    tsParseModifiers(modified, allowedModifiers, disallowedModifiers, errorTemplate) {
      const enforceOrder = (pos, modifier, before, after) => {
        if (modifier === before && modified[after]) {
          this.raise(pos, TSErrors.InvalidModifiersOrder, before, after);
        }
      };
  
      const incompatible = (pos, modifier, mod1, mod2) => {
        if (modified[mod1] && modifier === mod2 || modified[mod2] && modifier === mod1) {
          this.raise(pos, TSErrors.IncompatibleModifiers, mod1, mod2);
        }
      };
  
      for (;;) {
        const startPos = this.state.start;
        const modifier = this.tsParseModifier(allowedModifiers.concat(disallowedModifiers != null ? disallowedModifiers : []));
        if (!modifier) break;
  
        if (tsIsAccessModifier(modifier)) {
          if (modified.accessibility) {
            this.raise(startPos, TSErrors.DuplicateAccessibilityModifier);
          } else {
            enforceOrder(startPos, modifier, modifier, "override");
            enforceOrder(startPos, modifier, modifier, "static");
            enforceOrder(startPos, modifier, modifier, "readonly");
            modified.accessibility = modifier;
          }
        } else {
          if (Object.hasOwnProperty.call(modified, modifier)) {
            this.raise(startPos, TSErrors.DuplicateModifier, modifier);
          } else {
            enforceOrder(startPos, modifier, "static", "readonly");
            enforceOrder(startPos, modifier, "static", "override");
            enforceOrder(startPos, modifier, "override", "readonly");
            enforceOrder(startPos, modifier, "abstract", "override");
            incompatible(startPos, modifier, "declare", "override");
            incompatible(startPos, modifier, "static", "abstract");
          }
  
          modified[modifier] = true;
        }
  
        if (disallowedModifiers != null && disallowedModifiers.includes(modifier)) {
          this.raise(startPos, errorTemplate, modifier);
        }
      }
    }
  
    tsIsListTerminator(kind) {
      switch (kind) {
        case "EnumMembers":
        case "TypeMembers":
          return this.match(types$1.braceR);
  
        case "HeritageClauseElement":
          return this.match(types$1.braceL);
  
        case "TupleElementTypes":
          return this.match(types$1.bracketR);
  
        case "TypeParametersOrArguments":
          return this.isRelational(">");
      }
  
      throw new Error("Unreachable");
    }
  
    tsParseList(kind, parseElement) {
      const result = [];
  
      while (!this.tsIsListTerminator(kind)) {
        result.push(parseElement());
      }
  
      return result;
    }
  
    tsParseDelimitedList(kind, parseElement) {
      return nonNull(this.tsParseDelimitedListWorker(kind, parseElement, true));
    }
  
    tsParseDelimitedListWorker(kind, parseElement, expectSuccess) {
      const result = [];
  
      for (;;) {
        if (this.tsIsListTerminator(kind)) {
          break;
        }
  
        const element = parseElement();
  
        if (element == null) {
          return undefined;
        }
  
        result.push(element);
  
        if (this.eat(types$1.comma)) {
          continue;
        }
  
        if (this.tsIsListTerminator(kind)) {
          break;
        }
  
        if (expectSuccess) {
          this.expect(types$1.comma);
        }
  
        return undefined;
      }
  
      return result;
    }
  
    tsParseBracketedList(kind, parseElement, bracket, skipFirstToken) {
      if (!skipFirstToken) {
        if (bracket) {
          this.expect(types$1.bracketL);
        } else {
          this.expectRelational("<");
        }
      }
  
      const result = this.tsParseDelimitedList(kind, parseElement);
  
      if (bracket) {
        this.expect(types$1.bracketR);
      } else {
        this.expectRelational(">");
      }
  
      return result;
    }
  
    tsParseImportType() {
      const node = this.startNode();
      this.expect(types$1._import);
      this.expect(types$1.parenL);
  
      if (!this.match(types$1.string)) {
        this.raise(this.state.start, TSErrors.UnsupportedImportTypeArgument);
      }
  
      node.argument = this.parseExprAtom();
      this.expect(types$1.parenR);
  
      if (this.eat(types$1.dot)) {
        node.qualifier = this.tsParseEntityName(true);
      }
  
      if (this.isRelational("<")) {
        node.typeParameters = this.tsParseTypeArguments();
      }
  
      return this.finishNode(node, "TSImportType");
    }
  
    tsParseEntityName(allowReservedWords) {
      let entity = this.parseIdentifier();
  
      while (this.eat(types$1.dot)) {
        const node = this.startNodeAtNode(entity);
        node.left = entity;
        node.right = this.parseIdentifier(allowReservedWords);
        entity = this.finishNode(node, "TSQualifiedName");
      }
  
      return entity;
    }
  
    tsParseTypeReference() {
      const node = this.startNode();
      node.typeName = this.tsParseEntityName(false);
  
      if (!this.hasPrecedingLineBreak() && this.isRelational("<")) {
        node.typeParameters = this.tsParseTypeArguments();
      }
  
      return this.finishNode(node, "TSTypeReference");
    }
  
    tsParseThisTypePredicate(lhs) {
      this.next();
      const node = this.startNodeAtNode(lhs);
      node.parameterName = lhs;
      node.typeAnnotation = this.tsParseTypeAnnotation(false);
      node.asserts = false;
      return this.finishNode(node, "TSTypePredicate");
    }
  
    tsParseThisTypeNode() {
      const node = this.startNode();
      this.next();
      return this.finishNode(node, "TSThisType");
    }
  
    tsParseTypeQuery() {
      const node = this.startNode();
      this.expect(types$1._typeof);
  
      if (this.match(types$1._import)) {
        node.exprName = this.tsParseImportType();
      } else {
        node.exprName = this.tsParseEntityName(true);
      }
  
      return this.finishNode(node, "TSTypeQuery");
    }
  
    tsParseTypeParameter() {
      const node = this.startNode();
      node.name = this.tsParseTypeParameterName();
      node.constraint = this.tsEatThenParseType(types$1._extends);
      node.default = this.tsEatThenParseType(types$1.eq);
      return this.finishNode(node, "TSTypeParameter");
    }
  
    tsTryParseTypeParameters() {
      if (this.isRelational("<")) {
        return this.tsParseTypeParameters();
      }
    }
  
    tsParseTypeParameters() {
      const node = this.startNode();
  
      if (this.isRelational("<") || this.match(types$1.jsxTagStart)) {
        this.next();
      } else {
        this.unexpected();
      }
  
      node.params = this.tsParseBracketedList("TypeParametersOrArguments", this.tsParseTypeParameter.bind(this), false, true);
  
      if (node.params.length === 0) {
        this.raise(node.start, TSErrors.EmptyTypeParameters);
      }
  
      return this.finishNode(node, "TSTypeParameterDeclaration");
    }
  
    tsTryNextParseConstantContext() {
      if (this.lookahead().type === types$1._const) {
        this.next();
        return this.tsParseTypeReference();
      }
  
      return null;
    }
  
    tsFillSignature(returnToken, signature) {
      const returnTokenRequired = returnToken === types$1.arrow;
      signature.typeParameters = this.tsTryParseTypeParameters();
      this.expect(types$1.parenL);
      signature.parameters = this.tsParseBindingListForSignature();
  
      if (returnTokenRequired) {
        signature.typeAnnotation = this.tsParseTypeOrTypePredicateAnnotation(returnToken);
      } else if (this.match(returnToken)) {
        signature.typeAnnotation = this.tsParseTypeOrTypePredicateAnnotation(returnToken);
      }
    }
  
    tsParseBindingListForSignature() {
      return this.parseBindingList(types$1.parenR, 41).map(pattern => {
        if (pattern.type !== "Identifier" && pattern.type !== "RestElement" && pattern.type !== "ObjectPattern" && pattern.type !== "ArrayPattern") {
          this.raise(pattern.start, TSErrors.UnsupportedSignatureParameterKind, pattern.type);
        }
  
        return pattern;
      });
    }
  
    tsParseTypeMemberSemicolon() {
      if (!this.eat(types$1.comma) && !this.isLineTerminator()) {
        this.expect(types$1.semi);
      }
    }
  
    tsParseSignatureMember(kind, node) {
      this.tsFillSignature(types$1.colon, node);
      this.tsParseTypeMemberSemicolon();
      return this.finishNode(node, kind);
    }
  
    tsIsUnambiguouslyIndexSignature() {
      this.next();
      return this.eat(types$1.name) && this.match(types$1.colon);
    }
  
    tsTryParseIndexSignature(node) {
      if (!(this.match(types$1.bracketL) && this.tsLookAhead(this.tsIsUnambiguouslyIndexSignature.bind(this)))) {
        return undefined;
      }
  
      this.expect(types$1.bracketL);
      const id = this.parseIdentifier();
      id.typeAnnotation = this.tsParseTypeAnnotation();
      this.resetEndLocation(id);
      this.expect(types$1.bracketR);
      node.parameters = [id];
      const type = this.tsTryParseTypeAnnotation();
      if (type) node.typeAnnotation = type;
      this.tsParseTypeMemberSemicolon();
      return this.finishNode(node, "TSIndexSignature");
    }
  
    tsParsePropertyOrMethodSignature(node, readonly) {
      if (this.eat(types$1.question)) node.optional = true;
      const nodeAny = node;
  
      if (this.match(types$1.parenL) || this.isRelational("<")) {
        if (readonly) {
          this.raise(node.start, TSErrors.ReadonlyForMethodSignature);
        }
  
        const method = nodeAny;
  
        if (method.kind && this.isRelational("<")) {
          this.raise(this.state.pos, TSErrors.AccesorCannotHaveTypeParameters);
        }
  
        this.tsFillSignature(types$1.colon, method);
        this.tsParseTypeMemberSemicolon();
  
        if (method.kind === "get") {
          if (method.parameters.length > 0) {
            this.raise(this.state.pos, ErrorMessages.BadGetterArity);
  
            if (this.isThisParam(method.parameters[0])) {
              this.raise(this.state.pos, TSErrors.AccesorCannotDeclareThisParameter);
            }
          }
        } else if (method.kind === "set") {
          if (method.parameters.length !== 1) {
            this.raise(this.state.pos, ErrorMessages.BadSetterArity);
          } else {
            const firstParameter = method.parameters[0];
  
            if (this.isThisParam(firstParameter)) {
              this.raise(this.state.pos, TSErrors.AccesorCannotDeclareThisParameter);
            }
  
            if (firstParameter.type === "Identifier" && firstParameter.optional) {
              this.raise(this.state.pos, TSErrors.SetAccesorCannotHaveOptionalParameter);
            }
  
            if (firstParameter.type === "RestElement") {
              this.raise(this.state.pos, TSErrors.SetAccesorCannotHaveRestParameter);
            }
          }
  
          if (method.typeAnnotation) {
            this.raise(method.typeAnnotation.start, TSErrors.SetAccesorCannotHaveReturnType);
          }
        } else {
          method.kind = "method";
        }
  
        return this.finishNode(method, "TSMethodSignature");
      } else {
        const property = nodeAny;
        if (readonly) property.readonly = true;
        const type = this.tsTryParseTypeAnnotation();
        if (type) property.typeAnnotation = type;
        this.tsParseTypeMemberSemicolon();
        return this.finishNode(property, "TSPropertySignature");
      }
    }
  
    tsParseTypeMember() {
      const node = this.startNode();
  
      if (this.match(types$1.parenL) || this.isRelational("<")) {
        return this.tsParseSignatureMember("TSCallSignatureDeclaration", node);
      }
  
      if (this.match(types$1._new)) {
        const id = this.startNode();
        this.next();
  
        if (this.match(types$1.parenL) || this.isRelational("<")) {
          return this.tsParseSignatureMember("TSConstructSignatureDeclaration", node);
        } else {
          node.key = this.createIdentifier(id, "new");
          return this.tsParsePropertyOrMethodSignature(node, false);
        }
      }
  
      this.tsParseModifiers(node, ["readonly"], ["declare", "abstract", "private", "protected", "public", "static", "override"], TSErrors.InvalidModifierOnTypeMember);
      const idx = this.tsTryParseIndexSignature(node);
  
      if (idx) {
        return idx;
      }
  
      this.parsePropertyName(node, false);
  
      if (!node.computed && node.key.type === "Identifier" && (node.key.name === "get" || node.key.name === "set") && this.tsTokenCanFollowModifier()) {
        node.kind = node.key.name;
        this.parsePropertyName(node, false);
      }
  
      return this.tsParsePropertyOrMethodSignature(node, !!node.readonly);
    }
  
    tsParseTypeLiteral() {
      const node = this.startNode();
      node.members = this.tsParseObjectTypeMembers();
      return this.finishNode(node, "TSTypeLiteral");
    }
  
    tsParseObjectTypeMembers() {
      this.expect(types$1.braceL);
      const members = this.tsParseList("TypeMembers", this.tsParseTypeMember.bind(this));
      this.expect(types$1.braceR);
      return members;
    }
  
    tsIsStartOfMappedType() {
      this.next();
  
      if (this.eat(types$1.plusMin)) {
        return this.isContextual("readonly");
      }
  
      if (this.isContextual("readonly")) {
        this.next();
      }
  
      if (!this.match(types$1.bracketL)) {
        return false;
      }
  
      this.next();
  
      if (!this.tsIsIdentifier()) {
        return false;
      }
  
      this.next();
      return this.match(types$1._in);
    }
  
    tsParseMappedTypeParameter() {
      const node = this.startNode();
      node.name = this.tsParseTypeParameterName();
      node.constraint = this.tsExpectThenParseType(types$1._in);
      return this.finishNode(node, "TSTypeParameter");
    }
  
    tsParseMappedType() {
      const node = this.startNode();
      this.expect(types$1.braceL);
  
      if (this.match(types$1.plusMin)) {
        node.readonly = this.state.value;
        this.next();
        this.expectContextual("readonly");
      } else if (this.eatContextual("readonly")) {
        node.readonly = true;
      }
  
      this.expect(types$1.bracketL);
      node.typeParameter = this.tsParseMappedTypeParameter();
      node.nameType = this.eatContextual("as") ? this.tsParseType() : null;
      this.expect(types$1.bracketR);
  
      if (this.match(types$1.plusMin)) {
        node.optional = this.state.value;
        this.next();
        this.expect(types$1.question);
      } else if (this.eat(types$1.question)) {
        node.optional = true;
      }
  
      node.typeAnnotation = this.tsTryParseType();
      this.semicolon();
      this.expect(types$1.braceR);
      return this.finishNode(node, "TSMappedType");
    }
  
    tsParseTupleType() {
      const node = this.startNode();
      node.elementTypes = this.tsParseBracketedList("TupleElementTypes", this.tsParseTupleElementType.bind(this), true, false);
      let seenOptionalElement = false;
      let labeledElements = null;
      node.elementTypes.forEach(elementNode => {
        var _labeledElements;
  
        let {
          type
        } = elementNode;
  
        if (seenOptionalElement && type !== "TSRestType" && type !== "TSOptionalType" && !(type === "TSNamedTupleMember" && elementNode.optional)) {
          this.raise(elementNode.start, TSErrors.OptionalTypeBeforeRequired);
        }
  
        seenOptionalElement = seenOptionalElement || type === "TSNamedTupleMember" && elementNode.optional || type === "TSOptionalType";
  
        if (type === "TSRestType") {
          elementNode = elementNode.typeAnnotation;
          type = elementNode.type;
        }
  
        const isLabeled = type === "TSNamedTupleMember";
        labeledElements = (_labeledElements = labeledElements) != null ? _labeledElements : isLabeled;
  
        if (labeledElements !== isLabeled) {
          this.raise(elementNode.start, TSErrors.MixedLabeledAndUnlabeledElements);
        }
      });
      return this.finishNode(node, "TSTupleType");
    }
  
    tsParseTupleElementType() {
      const {
        start: startPos,
        startLoc
      } = this.state;
      const rest = this.eat(types$1.ellipsis);
      let type = this.tsParseType();
      const optional = this.eat(types$1.question);
      const labeled = this.eat(types$1.colon);
  
      if (labeled) {
        const labeledNode = this.startNodeAtNode(type);
        labeledNode.optional = optional;
  
        if (type.type === "TSTypeReference" && !type.typeParameters && type.typeName.type === "Identifier") {
          labeledNode.label = type.typeName;
        } else {
          this.raise(type.start, TSErrors.InvalidTupleMemberLabel);
          labeledNode.label = type;
        }
  
        labeledNode.elementType = this.tsParseType();
        type = this.finishNode(labeledNode, "TSNamedTupleMember");
      } else if (optional) {
        const optionalTypeNode = this.startNodeAtNode(type);
        optionalTypeNode.typeAnnotation = type;
        type = this.finishNode(optionalTypeNode, "TSOptionalType");
      }
  
      if (rest) {
        const restNode = this.startNodeAt(startPos, startLoc);
        restNode.typeAnnotation = type;
        type = this.finishNode(restNode, "TSRestType");
      }
  
      return type;
    }
  
    tsParseParenthesizedType() {
      const node = this.startNode();
      this.expect(types$1.parenL);
      node.typeAnnotation = this.tsParseType();
      this.expect(types$1.parenR);
      return this.finishNode(node, "TSParenthesizedType");
    }
  
    tsParseFunctionOrConstructorType(type, abstract) {
      const node = this.startNode();
  
      if (type === "TSConstructorType") {
        node.abstract = !!abstract;
        if (abstract) this.next();
        this.next();
      }
  
      this.tsFillSignature(types$1.arrow, node);
      return this.finishNode(node, type);
    }
  
    tsParseLiteralTypeNode() {
      const node = this.startNode();
  
      node.literal = (() => {
        switch (this.state.type) {
          case types$1.num:
          case types$1.bigint:
          case types$1.string:
          case types$1._true:
          case types$1._false:
            return this.parseExprAtom();
  
          default:
            throw this.unexpected();
        }
      })();
  
      return this.finishNode(node, "TSLiteralType");
    }
  
    tsParseTemplateLiteralType() {
      const node = this.startNode();
      node.literal = this.parseTemplate(false);
      return this.finishNode(node, "TSLiteralType");
    }
  
    parseTemplateSubstitution() {
      if (this.state.inType) return this.tsParseType();
      return super.parseTemplateSubstitution();
    }
  
    tsParseThisTypeOrThisTypePredicate() {
      const thisKeyword = this.tsParseThisTypeNode();
  
      if (this.isContextual("is") && !this.hasPrecedingLineBreak()) {
        return this.tsParseThisTypePredicate(thisKeyword);
      } else {
        return thisKeyword;
      }
    }
  
    tsParseNonArrayType() {
      switch (this.state.type) {
        case types$1.name:
        case types$1._void:
        case types$1._null:
          {
            const type = this.match(types$1._void) ? "TSVoidKeyword" : this.match(types$1._null) ? "TSNullKeyword" : keywordTypeFromName(this.state.value);
  
            if (type !== undefined && this.lookaheadCharCode() !== 46) {
              const node = this.startNode();
              this.next();
              return this.finishNode(node, type);
            }
  
            return this.tsParseTypeReference();
          }
  
        case types$1.string:
        case types$1.num:
        case types$1.bigint:
        case types$1._true:
        case types$1._false:
          return this.tsParseLiteralTypeNode();
  
        case types$1.plusMin:
          if (this.state.value === "-") {
            const node = this.startNode();
            const nextToken = this.lookahead();
  
            if (nextToken.type !== types$1.num && nextToken.type !== types$1.bigint) {
              throw this.unexpected();
            }
  
            node.literal = this.parseMaybeUnary();
            return this.finishNode(node, "TSLiteralType");
          }
  
          break;
  
        case types$1._this:
          return this.tsParseThisTypeOrThisTypePredicate();
  
        case types$1._typeof:
          return this.tsParseTypeQuery();
  
        case types$1._import:
          return this.tsParseImportType();
  
        case types$1.braceL:
          return this.tsLookAhead(this.tsIsStartOfMappedType.bind(this)) ? this.tsParseMappedType() : this.tsParseTypeLiteral();
  
        case types$1.bracketL:
          return this.tsParseTupleType();
  
        case types$1.parenL:
          return this.tsParseParenthesizedType();
  
        case types$1.backQuote:
          return this.tsParseTemplateLiteralType();
      }
  
      throw this.unexpected();
    }
  
    tsParseArrayTypeOrHigher() {
      let type = this.tsParseNonArrayType();
  
      while (!this.hasPrecedingLineBreak() && this.eat(types$1.bracketL)) {
        if (this.match(types$1.bracketR)) {
          const node = this.startNodeAtNode(type);
          node.elementType = type;
          this.expect(types$1.bracketR);
          type = this.finishNode(node, "TSArrayType");
        } else {
          const node = this.startNodeAtNode(type);
          node.objectType = type;
          node.indexType = this.tsParseType();
          this.expect(types$1.bracketR);
          type = this.finishNode(node, "TSIndexedAccessType");
        }
      }
  
      return type;
    }
  
    tsParseTypeOperator(operator) {
      const node = this.startNode();
      this.expectContextual(operator);
      node.operator = operator;
      node.typeAnnotation = this.tsParseTypeOperatorOrHigher();
  
      if (operator === "readonly") {
        this.tsCheckTypeAnnotationForReadOnly(node);
      }
  
      return this.finishNode(node, "TSTypeOperator");
    }
  
    tsCheckTypeAnnotationForReadOnly(node) {
      switch (node.typeAnnotation.type) {
        case "TSTupleType":
        case "TSArrayType":
          return;
  
        default:
          this.raise(node.start, TSErrors.UnexpectedReadonly);
      }
    }
  
    tsParseInferType() {
      const node = this.startNode();
      this.expectContextual("infer");
      const typeParameter = this.startNode();
      typeParameter.name = this.tsParseTypeParameterName();
      node.typeParameter = this.finishNode(typeParameter, "TSTypeParameter");
      return this.finishNode(node, "TSInferType");
    }
  
    tsParseTypeOperatorOrHigher() {
      const operator = ["keyof", "unique", "readonly"].find(kw => this.isContextual(kw));
      return operator ? this.tsParseTypeOperator(operator) : this.isContextual("infer") ? this.tsParseInferType() : this.tsParseArrayTypeOrHigher();
    }
  
    tsParseUnionOrIntersectionType(kind, parseConstituentType, operator) {
      const node = this.startNode();
      const hasLeadingOperator = this.eat(operator);
      const types = [];
  
      do {
        types.push(parseConstituentType());
      } while (this.eat(operator));
  
      if (types.length === 1 && !hasLeadingOperator) {
        return types[0];
      }
  
      node.types = types;
      return this.finishNode(node, kind);
    }
  
    tsParseIntersectionTypeOrHigher() {
      return this.tsParseUnionOrIntersectionType("TSIntersectionType", this.tsParseTypeOperatorOrHigher.bind(this), types$1.bitwiseAND);
    }
  
    tsParseUnionTypeOrHigher() {
      return this.tsParseUnionOrIntersectionType("TSUnionType", this.tsParseIntersectionTypeOrHigher.bind(this), types$1.bitwiseOR);
    }
  
    tsIsStartOfFunctionType() {
      if (this.isRelational("<")) {
        return true;
      }
  
      return this.match(types$1.parenL) && this.tsLookAhead(this.tsIsUnambiguouslyStartOfFunctionType.bind(this));
    }
  
    tsSkipParameterStart() {
      if (this.match(types$1.name) || this.match(types$1._this)) {
        this.next();
        return true;
      }
  
      if (this.match(types$1.braceL)) {
        let braceStackCounter = 1;
        this.next();
  
        while (braceStackCounter > 0) {
          if (this.match(types$1.braceL)) {
            ++braceStackCounter;
          } else if (this.match(types$1.braceR)) {
            --braceStackCounter;
          }
  
          this.next();
        }
  
        return true;
      }
  
      if (this.match(types$1.bracketL)) {
        let braceStackCounter = 1;
        this.next();
  
        while (braceStackCounter > 0) {
          if (this.match(types$1.bracketL)) {
            ++braceStackCounter;
          } else if (this.match(types$1.bracketR)) {
            --braceStackCounter;
          }
  
          this.next();
        }
  
        return true;
      }
  
      return false;
    }
  
    tsIsUnambiguouslyStartOfFunctionType() {
      this.next();
  
      if (this.match(types$1.parenR) || this.match(types$1.ellipsis)) {
        return true;
      }
  
      if (this.tsSkipParameterStart()) {
        if (this.match(types$1.colon) || this.match(types$1.comma) || this.match(types$1.question) || this.match(types$1.eq)) {
          return true;
        }
  
        if (this.match(types$1.parenR)) {
          this.next();
  
          if (this.match(types$1.arrow)) {
            return true;
          }
        }
      }
  
      return false;
    }
  
    tsParseTypeOrTypePredicateAnnotation(returnToken) {
      return this.tsInType(() => {
        const t = this.startNode();
        this.expect(returnToken);
        const node = this.startNode();
        const asserts = !!this.tsTryParse(this.tsParseTypePredicateAsserts.bind(this));
  
        if (asserts && this.match(types$1._this)) {
          let thisTypePredicate = this.tsParseThisTypeOrThisTypePredicate();
  
          if (thisTypePredicate.type === "TSThisType") {
            node.parameterName = thisTypePredicate;
            node.asserts = true;
            node.typeAnnotation = null;
            thisTypePredicate = this.finishNode(node, "TSTypePredicate");
          } else {
            this.resetStartLocationFromNode(thisTypePredicate, node);
            thisTypePredicate.asserts = true;
          }
  
          t.typeAnnotation = thisTypePredicate;
          return this.finishNode(t, "TSTypeAnnotation");
        }
  
        const typePredicateVariable = this.tsIsIdentifier() && this.tsTryParse(this.tsParseTypePredicatePrefix.bind(this));
  
        if (!typePredicateVariable) {
          if (!asserts) {
            return this.tsParseTypeAnnotation(false, t);
          }
  
          node.parameterName = this.parseIdentifier();
          node.asserts = asserts;
          node.typeAnnotation = null;
          t.typeAnnotation = this.finishNode(node, "TSTypePredicate");
          return this.finishNode(t, "TSTypeAnnotation");
        }
  
        const type = this.tsParseTypeAnnotation(false);
        node.parameterName = typePredicateVariable;
        node.typeAnnotation = type;
        node.asserts = asserts;
        t.typeAnnotation = this.finishNode(node, "TSTypePredicate");
        return this.finishNode(t, "TSTypeAnnotation");
      });
    }
  
    tsTryParseTypeOrTypePredicateAnnotation() {
      return this.match(types$1.colon) ? this.tsParseTypeOrTypePredicateAnnotation(types$1.colon) : undefined;
    }
  
    tsTryParseTypeAnnotation() {
      return this.match(types$1.colon) ? this.tsParseTypeAnnotation() : undefined;
    }
  
    tsTryParseType() {
      return this.tsEatThenParseType(types$1.colon);
    }
  
    tsParseTypePredicatePrefix() {
      const id = this.parseIdentifier();
  
      if (this.isContextual("is") && !this.hasPrecedingLineBreak()) {
        this.next();
        return id;
      }
    }
  
    tsParseTypePredicateAsserts() {
      if (!this.match(types$1.name) || this.state.value !== "asserts" || this.hasPrecedingLineBreak()) {
        return false;
      }
  
      const containsEsc = this.state.containsEsc;
      this.next();
  
      if (!this.match(types$1.name) && !this.match(types$1._this)) {
        return false;
      }
  
      if (containsEsc) {
        this.raise(this.state.lastTokStart, ErrorMessages.InvalidEscapedReservedWord, "asserts");
      }
  
      return true;
    }
  
    tsParseTypeAnnotation(eatColon = true, t = this.startNode()) {
      this.tsInType(() => {
        if (eatColon) this.expect(types$1.colon);
        t.typeAnnotation = this.tsParseType();
      });
      return this.finishNode(t, "TSTypeAnnotation");
    }
  
    tsParseType() {
      assert(this.state.inType);
      const type = this.tsParseNonConditionalType();
  
      if (this.hasPrecedingLineBreak() || !this.eat(types$1._extends)) {
        return type;
      }
  
      const node = this.startNodeAtNode(type);
      node.checkType = type;
      node.extendsType = this.tsParseNonConditionalType();
      this.expect(types$1.question);
      node.trueType = this.tsParseType();
      this.expect(types$1.colon);
      node.falseType = this.tsParseType();
      return this.finishNode(node, "TSConditionalType");
    }
  
    isAbstractConstructorSignature() {
      return this.isContextual("abstract") && this.lookahead().type === types$1._new;
    }
  
    tsParseNonConditionalType() {
      if (this.tsIsStartOfFunctionType()) {
        return this.tsParseFunctionOrConstructorType("TSFunctionType");
      }
  
      if (this.match(types$1._new)) {
        return this.tsParseFunctionOrConstructorType("TSConstructorType");
      } else if (this.isAbstractConstructorSignature()) {
        return this.tsParseFunctionOrConstructorType("TSConstructorType", true);
      }
  
      return this.tsParseUnionTypeOrHigher();
    }
  
    tsParseTypeAssertion() {
      const node = this.startNode();
  
      const _const = this.tsTryNextParseConstantContext();
  
      node.typeAnnotation = _const || this.tsNextThenParseType();
      this.expectRelational(">");
      node.expression = this.parseMaybeUnary();
      return this.finishNode(node, "TSTypeAssertion");
    }
  
    tsParseHeritageClause(descriptor) {
      const originalStart = this.state.start;
      const delimitedList = this.tsParseDelimitedList("HeritageClauseElement", this.tsParseExpressionWithTypeArguments.bind(this));
  
      if (!delimitedList.length) {
        this.raise(originalStart, TSErrors.EmptyHeritageClauseType, descriptor);
      }
  
      return delimitedList;
    }
  
    tsParseExpressionWithTypeArguments() {
      const node = this.startNode();
      node.expression = this.tsParseEntityName(false);
  
      if (this.isRelational("<")) {
        node.typeParameters = this.tsParseTypeArguments();
      }
  
      return this.finishNode(node, "TSExpressionWithTypeArguments");
    }
  
    tsParseInterfaceDeclaration(node) {
      node.id = this.parseIdentifier();
      this.checkLVal(node.id, "typescript interface declaration", BIND_TS_INTERFACE);
      node.typeParameters = this.tsTryParseTypeParameters();
  
      if (this.eat(types$1._extends)) {
        node.extends = this.tsParseHeritageClause("extends");
      }
  
      const body = this.startNode();
      body.body = this.tsInType(this.tsParseObjectTypeMembers.bind(this));
      node.body = this.finishNode(body, "TSInterfaceBody");
      return this.finishNode(node, "TSInterfaceDeclaration");
    }
  
    tsParseTypeAliasDeclaration(node) {
      node.id = this.parseIdentifier();
      this.checkLVal(node.id, "typescript type alias", BIND_TS_TYPE);
      node.typeParameters = this.tsTryParseTypeParameters();
      node.typeAnnotation = this.tsInType(() => {
        this.expect(types$1.eq);
  
        if (this.isContextual("intrinsic") && this.lookahead().type !== types$1.dot) {
          const node = this.startNode();
          this.next();
          return this.finishNode(node, "TSIntrinsicKeyword");
        }
  
        return this.tsParseType();
      });
      this.semicolon();
      return this.finishNode(node, "TSTypeAliasDeclaration");
    }
  
    tsInNoContext(cb) {
      const oldContext = this.state.context;
      this.state.context = [oldContext[0]];
  
      try {
        return cb();
      } finally {
        this.state.context = oldContext;
      }
    }
  
    tsInType(cb) {
      const oldInType = this.state.inType;
      this.state.inType = true;
  
      try {
        return cb();
      } finally {
        this.state.inType = oldInType;
      }
    }
  
    tsEatThenParseType(token) {
      return !this.match(token) ? undefined : this.tsNextThenParseType();
    }
  
    tsExpectThenParseType(token) {
      return this.tsDoThenParseType(() => this.expect(token));
    }
  
    tsNextThenParseType() {
      return this.tsDoThenParseType(() => this.next());
    }
  
    tsDoThenParseType(cb) {
      return this.tsInType(() => {
        cb();
        return this.tsParseType();
      });
    }
  
    tsParseEnumMember() {
      const node = this.startNode();
      node.id = this.match(types$1.string) ? this.parseExprAtom() : this.parseIdentifier(true);
  
      if (this.eat(types$1.eq)) {
        node.initializer = this.parseMaybeAssignAllowIn();
      }
  
      return this.finishNode(node, "TSEnumMember");
    }
  
    tsParseEnumDeclaration(node, isConst) {
      if (isConst) node.const = true;
      node.id = this.parseIdentifier();
      this.checkLVal(node.id, "typescript enum declaration", isConst ? BIND_TS_CONST_ENUM : BIND_TS_ENUM);
      this.expect(types$1.braceL);
      node.members = this.tsParseDelimitedList("EnumMembers", this.tsParseEnumMember.bind(this));
      this.expect(types$1.braceR);
      return this.finishNode(node, "TSEnumDeclaration");
    }
  
    tsParseModuleBlock() {
      const node = this.startNode();
      this.scope.enter(SCOPE_OTHER);
      this.expect(types$1.braceL);
      this.parseBlockOrModuleBlockBody(node.body = [], undefined, true, types$1.braceR);
      this.scope.exit();
      return this.finishNode(node, "TSModuleBlock");
    }
  
    tsParseModuleOrNamespaceDeclaration(node, nested = false) {
      node.id = this.parseIdentifier();
  
      if (!nested) {
        this.checkLVal(node.id, "module or namespace declaration", BIND_TS_NAMESPACE);
      }
  
      if (this.eat(types$1.dot)) {
        const inner = this.startNode();
        this.tsParseModuleOrNamespaceDeclaration(inner, true);
        node.body = inner;
      } else {
        this.scope.enter(SCOPE_TS_MODULE);
        this.prodParam.enter(PARAM);
        node.body = this.tsParseModuleBlock();
        this.prodParam.exit();
        this.scope.exit();
      }
  
      return this.finishNode(node, "TSModuleDeclaration");
    }
  
    tsParseAmbientExternalModuleDeclaration(node) {
      if (this.isContextual("global")) {
        node.global = true;
        node.id = this.parseIdentifier();
      } else if (this.match(types$1.string)) {
        node.id = this.parseExprAtom();
      } else {
        this.unexpected();
      }
  
      if (this.match(types$1.braceL)) {
        this.scope.enter(SCOPE_TS_MODULE);
        this.prodParam.enter(PARAM);
        node.body = this.tsParseModuleBlock();
        this.prodParam.exit();
        this.scope.exit();
      } else {
        this.semicolon();
      }
  
      return this.finishNode(node, "TSModuleDeclaration");
    }
  
    tsParseImportEqualsDeclaration(node, isExport) {
      node.isExport = isExport || false;
      node.id = this.parseIdentifier();
      this.checkLVal(node.id, "import equals declaration", BIND_LEXICAL);
      this.expect(types$1.eq);
      const moduleReference = this.tsParseModuleReference();
  
      if (node.importKind === "type" && moduleReference.type !== "TSExternalModuleReference") {
        this.raise(moduleReference.start, TSErrors.ImportAliasHasImportType);
      }
  
      node.moduleReference = moduleReference;
      this.semicolon();
      return this.finishNode(node, "TSImportEqualsDeclaration");
    }
  
    tsIsExternalModuleReference() {
      return this.isContextual("require") && this.lookaheadCharCode() === 40;
    }
  
    tsParseModuleReference() {
      return this.tsIsExternalModuleReference() ? this.tsParseExternalModuleReference() : this.tsParseEntityName(false);
    }
  
    tsParseExternalModuleReference() {
      const node = this.startNode();
      this.expectContextual("require");
      this.expect(types$1.parenL);
  
      if (!this.match(types$1.string)) {
        throw this.unexpected();
      }
  
      node.expression = this.parseExprAtom();
      this.expect(types$1.parenR);
      return this.finishNode(node, "TSExternalModuleReference");
    }
  
    tsLookAhead(f) {
      const state = this.state.clone();
      const res = f();
      this.state = state;
      return res;
    }
  
    tsTryParseAndCatch(f) {
      const result = this.tryParse(abort => f() || abort());
      if (result.aborted || !result.node) return undefined;
      if (result.error) this.state = result.failState;
      return result.node;
    }
  
    tsTryParse(f) {
      const state = this.state.clone();
      const result = f();
  
      if (result !== undefined && result !== false) {
        return result;
      } else {
        this.state = state;
        return undefined;
      }
    }
  
    tsTryParseDeclare(nany) {
      if (this.isLineTerminator()) {
        return;
      }
  
      let starttype = this.state.type;
      let kind;
  
      if (this.isContextual("let")) {
        starttype = types$1._var;
        kind = "let";
      }
  
      return this.tsInAmbientContext(() => {
        switch (starttype) {
          case types$1._function:
            nany.declare = true;
            return this.parseFunctionStatement(nany, false, true);
  
          case types$1._class:
            nany.declare = true;
            return this.parseClass(nany, true, false);
  
          case types$1._const:
            if (this.match(types$1._const) && this.isLookaheadContextual("enum")) {
              this.expect(types$1._const);
              this.expectContextual("enum");
              return this.tsParseEnumDeclaration(nany, true);
            }
  
          case types$1._var:
            kind = kind || this.state.value;
            return this.parseVarStatement(nany, kind);
  
          case types$1.name:
            {
              const value = this.state.value;
  
              if (value === "global") {
                return this.tsParseAmbientExternalModuleDeclaration(nany);
              } else {
                return this.tsParseDeclaration(nany, value, true);
              }
            }
        }
      });
    }
  
    tsTryParseExportDeclaration() {
      return this.tsParseDeclaration(this.startNode(), this.state.value, true);
    }
  
    tsParseExpressionStatement(node, expr) {
      switch (expr.name) {
        case "declare":
          {
            const declaration = this.tsTryParseDeclare(node);
  
            if (declaration) {
              declaration.declare = true;
              return declaration;
            }
  
            break;
          }
  
        case "global":
          if (this.match(types$1.braceL)) {
            this.scope.enter(SCOPE_TS_MODULE);
            this.prodParam.enter(PARAM);
            const mod = node;
            mod.global = true;
            mod.id = expr;
            mod.body = this.tsParseModuleBlock();
            this.scope.exit();
            this.prodParam.exit();
            return this.finishNode(mod, "TSModuleDeclaration");
          }
  
          break;
  
        default:
          return this.tsParseDeclaration(node, expr.name, false);
      }
    }
  
    tsParseDeclaration(node, value, next) {
      switch (value) {
        case "abstract":
          if (this.tsCheckLineTerminator(next) && (this.match(types$1._class) || this.match(types$1.name))) {
            return this.tsParseAbstractDeclaration(node);
          }
  
          break;
  
        case "enum":
          if (next || this.match(types$1.name)) {
            if (next) this.next();
            return this.tsParseEnumDeclaration(node, false);
          }
  
          break;
  
        case "interface":
          if (this.tsCheckLineTerminator(next) && this.match(types$1.name)) {
            return this.tsParseInterfaceDeclaration(node);
          }
  
          break;
  
        case "module":
          if (this.tsCheckLineTerminator(next)) {
            if (this.match(types$1.string)) {
              return this.tsParseAmbientExternalModuleDeclaration(node);
            } else if (this.match(types$1.name)) {
              return this.tsParseModuleOrNamespaceDeclaration(node);
            }
          }
  
          break;
  
        case "namespace":
          if (this.tsCheckLineTerminator(next) && this.match(types$1.name)) {
            return this.tsParseModuleOrNamespaceDeclaration(node);
          }
  
          break;
  
        case "type":
          if (this.tsCheckLineTerminator(next) && this.match(types$1.name)) {
            return this.tsParseTypeAliasDeclaration(node);
          }
  
          break;
      }
    }
  
    tsCheckLineTerminator(next) {
      if (next) {
        if (this.hasFollowingLineBreak()) return false;
        this.next();
        return true;
      }
  
      return !this.isLineTerminator();
    }
  
    tsTryParseGenericAsyncArrowFunction(startPos, startLoc) {
      if (!this.isRelational("<")) {
        return undefined;
      }
  
      const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
      this.state.maybeInArrowParameters = true;
      const res = this.tsTryParseAndCatch(() => {
        const node = this.startNodeAt(startPos, startLoc);
        node.typeParameters = this.tsParseTypeParameters();
        super.parseFunctionParams(node);
        node.returnType = this.tsTryParseTypeOrTypePredicateAnnotation();
        this.expect(types$1.arrow);
        return node;
      });
      this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
  
      if (!res) {
        return undefined;
      }
  
      return this.parseArrowExpression(res, null, true);
    }
  
    tsParseTypeArguments() {
      const node = this.startNode();
      node.params = this.tsInType(() => this.tsInNoContext(() => {
        this.expectRelational("<");
        return this.tsParseDelimitedList("TypeParametersOrArguments", this.tsParseType.bind(this));
      }));
  
      if (node.params.length === 0) {
        this.raise(node.start, TSErrors.EmptyTypeArguments);
      }
  
      this.expectRelational(">");
      return this.finishNode(node, "TSTypeParameterInstantiation");
    }
  
    tsIsDeclarationStart() {
      if (this.match(types$1.name)) {
        switch (this.state.value) {
          case "abstract":
          case "declare":
          case "enum":
          case "interface":
          case "module":
          case "namespace":
          case "type":
            return true;
        }
      }
  
      return false;
    }
  
    isExportDefaultSpecifier() {
      if (this.tsIsDeclarationStart()) return false;
      return super.isExportDefaultSpecifier();
    }
  
    parseAssignableListItem(allowModifiers, decorators) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      let accessibility;
      let readonly = false;
      let override = false;
  
      if (allowModifiers !== undefined) {
        const modified = {};
        this.tsParseModifiers(modified, ["public", "private", "protected", "override", "readonly"]);
        accessibility = modified.accessibility;
        override = modified.override;
        readonly = modified.readonly;
  
        if (allowModifiers === false && (accessibility || readonly || override)) {
          this.raise(startPos, TSErrors.UnexpectedParameterModifier);
        }
      }
  
      const left = this.parseMaybeDefault();
      this.parseAssignableListItemTypes(left);
      const elt = this.parseMaybeDefault(left.start, left.loc.start, left);
  
      if (accessibility || readonly || override) {
        const pp = this.startNodeAt(startPos, startLoc);
  
        if (decorators.length) {
          pp.decorators = decorators;
        }
  
        if (accessibility) pp.accessibility = accessibility;
        if (readonly) pp.readonly = readonly;
        if (override) pp.override = override;
  
        if (elt.type !== "Identifier" && elt.type !== "AssignmentPattern") {
          this.raise(pp.start, TSErrors.UnsupportedParameterPropertyKind);
        }
  
        pp.parameter = elt;
        return this.finishNode(pp, "TSParameterProperty");
      }
  
      if (decorators.length) {
        left.decorators = decorators;
      }
  
      return elt;
    }
  
    parseFunctionBodyAndFinish(node, type, isMethod = false) {
      if (this.match(types$1.colon)) {
        node.returnType = this.tsParseTypeOrTypePredicateAnnotation(types$1.colon);
      }
  
      const bodilessType = type === "FunctionDeclaration" ? "TSDeclareFunction" : type === "ClassMethod" ? "TSDeclareMethod" : undefined;
  
      if (bodilessType && !this.match(types$1.braceL) && this.isLineTerminator()) {
        this.finishNode(node, bodilessType);
        return;
      }
  
      if (bodilessType === "TSDeclareFunction" && this.state.isAmbientContext) {
        this.raise(node.start, TSErrors.DeclareFunctionHasImplementation);
  
        if (node.declare) {
          super.parseFunctionBodyAndFinish(node, bodilessType, isMethod);
          return;
        }
      }
  
      super.parseFunctionBodyAndFinish(node, type, isMethod);
    }
  
    registerFunctionStatementId(node) {
      if (!node.body && node.id) {
        this.checkLVal(node.id, "function name", BIND_TS_AMBIENT);
      } else {
        super.registerFunctionStatementId(...arguments);
      }
    }
  
    tsCheckForInvalidTypeCasts(items) {
      items.forEach(node => {
        if ((node == null ? void 0 : node.type) === "TSTypeCastExpression") {
          this.raise(node.typeAnnotation.start, TSErrors.UnexpectedTypeAnnotation);
        }
      });
    }
  
    toReferencedList(exprList, isInParens) {
      this.tsCheckForInvalidTypeCasts(exprList);
      return exprList;
    }
  
    parseArrayLike(...args) {
      const node = super.parseArrayLike(...args);
  
      if (node.type === "ArrayExpression") {
        this.tsCheckForInvalidTypeCasts(node.elements);
      }
  
      return node;
    }
  
    parseSubscript(base, startPos, startLoc, noCalls, state) {
      if (!this.hasPrecedingLineBreak() && this.match(types$1.bang)) {
        this.state.exprAllowed = false;
        this.next();
        const nonNullExpression = this.startNodeAt(startPos, startLoc);
        nonNullExpression.expression = base;
        return this.finishNode(nonNullExpression, "TSNonNullExpression");
      }
  
      if (this.isRelational("<")) {
        const result = this.tsTryParseAndCatch(() => {
          if (!noCalls && this.atPossibleAsyncArrow(base)) {
            const asyncArrowFn = this.tsTryParseGenericAsyncArrowFunction(startPos, startLoc);
  
            if (asyncArrowFn) {
              return asyncArrowFn;
            }
          }
  
          const node = this.startNodeAt(startPos, startLoc);
          node.callee = base;
          const typeArguments = this.tsParseTypeArguments();
  
          if (typeArguments) {
            if (!noCalls && this.eat(types$1.parenL)) {
              node.arguments = this.parseCallExpressionArguments(types$1.parenR, false);
              this.tsCheckForInvalidTypeCasts(node.arguments);
              node.typeParameters = typeArguments;
  
              if (state.optionalChainMember) {
                node.optional = false;
              }
  
              return this.finishCallExpression(node, state.optionalChainMember);
            } else if (this.match(types$1.backQuote)) {
              const result = this.parseTaggedTemplateExpression(base, startPos, startLoc, state);
              result.typeParameters = typeArguments;
              return result;
            }
          }
  
          this.unexpected();
        });
        if (result) return result;
      }
  
      return super.parseSubscript(base, startPos, startLoc, noCalls, state);
    }
  
    parseNewArguments(node) {
      if (this.isRelational("<")) {
        const typeParameters = this.tsTryParseAndCatch(() => {
          const args = this.tsParseTypeArguments();
          if (!this.match(types$1.parenL)) this.unexpected();
          return args;
        });
  
        if (typeParameters) {
          node.typeParameters = typeParameters;
        }
      }
  
      super.parseNewArguments(node);
    }
  
    parseExprOp(left, leftStartPos, leftStartLoc, minPrec) {
      if (nonNull(types$1._in.binop) > minPrec && !this.hasPrecedingLineBreak() && this.isContextual("as")) {
        const node = this.startNodeAt(leftStartPos, leftStartLoc);
        node.expression = left;
  
        const _const = this.tsTryNextParseConstantContext();
  
        if (_const) {
          node.typeAnnotation = _const;
        } else {
          node.typeAnnotation = this.tsNextThenParseType();
        }
  
        this.finishNode(node, "TSAsExpression");
        this.reScan_lt_gt();
        return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec);
      }
  
      return super.parseExprOp(left, leftStartPos, leftStartLoc, minPrec);
    }
  
    checkReservedWord(word, startLoc, checkKeywords, isBinding) {}
  
    checkDuplicateExports() {}
  
    parseImport(node) {
      node.importKind = "value";
  
      if (this.match(types$1.name) || this.match(types$1.star) || this.match(types$1.braceL)) {
        let ahead = this.lookahead();
  
        if (this.isContextual("type") && ahead.type !== types$1.comma && !(ahead.type === types$1.name && ahead.value === "from") && ahead.type !== types$1.eq) {
          node.importKind = "type";
          this.next();
          ahead = this.lookahead();
        }
  
        if (this.match(types$1.name) && ahead.type === types$1.eq) {
          return this.tsParseImportEqualsDeclaration(node);
        }
      }
  
      const importNode = super.parseImport(node);
  
      if (importNode.importKind === "type" && importNode.specifiers.length > 1 && importNode.specifiers[0].type === "ImportDefaultSpecifier") {
        this.raise(importNode.start, TSErrors.TypeImportCannotSpecifyDefaultAndNamed);
      }
  
      return importNode;
    }
  
    parseExport(node) {
      if (this.match(types$1._import)) {
        this.next();
  
        if (this.isContextual("type") && this.lookaheadCharCode() !== 61) {
          node.importKind = "type";
          this.next();
        } else {
          node.importKind = "value";
        }
  
        return this.tsParseImportEqualsDeclaration(node, true);
      } else if (this.eat(types$1.eq)) {
        const assign = node;
        assign.expression = this.parseExpression();
        this.semicolon();
        return this.finishNode(assign, "TSExportAssignment");
      } else if (this.eatContextual("as")) {
        const decl = node;
        this.expectContextual("namespace");
        decl.id = this.parseIdentifier();
        this.semicolon();
        return this.finishNode(decl, "TSNamespaceExportDeclaration");
      } else {
        if (this.isContextual("type") && this.lookahead().type === types$1.braceL) {
          this.next();
          node.exportKind = "type";
        } else {
          node.exportKind = "value";
        }
  
        return super.parseExport(node);
      }
    }
  
    isAbstractClass() {
      return this.isContextual("abstract") && this.lookahead().type === types$1._class;
    }
  
    parseExportDefaultExpression() {
      if (this.isAbstractClass()) {
        const cls = this.startNode();
        this.next();
        cls.abstract = true;
        this.parseClass(cls, true, true);
        return cls;
      }
  
      if (this.state.value === "interface") {
        const result = this.tsParseDeclaration(this.startNode(), this.state.value, true);
        if (result) return result;
      }
  
      return super.parseExportDefaultExpression();
    }
  
    parseStatementContent(context, topLevel) {
      if (this.state.type === types$1._const) {
        const ahead = this.lookahead();
  
        if (ahead.type === types$1.name && ahead.value === "enum") {
          const node = this.startNode();
          this.expect(types$1._const);
          this.expectContextual("enum");
          return this.tsParseEnumDeclaration(node, true);
        }
      }
  
      return super.parseStatementContent(context, topLevel);
    }
  
    parseAccessModifier() {
      return this.tsParseModifier(["public", "protected", "private"]);
    }
  
    tsHasSomeModifiers(member, modifiers) {
      return modifiers.some(modifier => {
        if (tsIsAccessModifier(modifier)) {
          return member.accessibility === modifier;
        }
  
        return !!member[modifier];
      });
    }
  
    parseClassMember(classBody, member, state) {
      const invalidModifersForStaticBlocks = ["declare", "private", "public", "protected", "override", "abstract", "readonly"];
      this.tsParseModifiers(member, invalidModifersForStaticBlocks.concat(["static"]));
  
      const callParseClassMemberWithIsStatic = () => {
        const isStatic = !!member.static;
  
        if (isStatic && this.eat(types$1.braceL)) {
          if (this.tsHasSomeModifiers(member, invalidModifersForStaticBlocks)) {
            this.raise(this.state.pos, TSErrors.StaticBlockCannotHaveModifier);
          }
  
          this.parseClassStaticBlock(classBody, member);
        } else {
          this.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
        }
      };
  
      if (member.declare) {
        this.tsInAmbientContext(callParseClassMemberWithIsStatic);
      } else {
        callParseClassMemberWithIsStatic();
      }
    }
  
    parseClassMemberWithIsStatic(classBody, member, state, isStatic) {
      const idx = this.tsTryParseIndexSignature(member);
  
      if (idx) {
        classBody.body.push(idx);
  
        if (member.abstract) {
          this.raise(member.start, TSErrors.IndexSignatureHasAbstract);
        }
  
        if (member.accessibility) {
          this.raise(member.start, TSErrors.IndexSignatureHasAccessibility, member.accessibility);
        }
  
        if (member.declare) {
          this.raise(member.start, TSErrors.IndexSignatureHasDeclare);
        }
  
        if (member.override) {
          this.raise(member.start, TSErrors.IndexSignatureHasOverride);
        }
  
        return;
      }
  
      if (!this.state.inAbstractClass && member.abstract) {
        this.raise(member.start, TSErrors.NonAbstractClassHasAbstractMethod);
      }
  
      if (member.override) {
        if (!state.hadSuperClass) {
          this.raise(member.start, TSErrors.OverrideNotInSubClass);
        }
      }
  
      super.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
    }
  
    parsePostMemberNameModifiers(methodOrProp) {
      const optional = this.eat(types$1.question);
      if (optional) methodOrProp.optional = true;
  
      if (methodOrProp.readonly && this.match(types$1.parenL)) {
        this.raise(methodOrProp.start, TSErrors.ClassMethodHasReadonly);
      }
  
      if (methodOrProp.declare && this.match(types$1.parenL)) {
        this.raise(methodOrProp.start, TSErrors.ClassMethodHasDeclare);
      }
    }
  
    parseExpressionStatement(node, expr) {
      const decl = expr.type === "Identifier" ? this.tsParseExpressionStatement(node, expr) : undefined;
      return decl || super.parseExpressionStatement(node, expr);
    }
  
    shouldParseExportDeclaration() {
      if (this.tsIsDeclarationStart()) return true;
      return super.shouldParseExportDeclaration();
    }
  
    parseConditional(expr, startPos, startLoc, refExpressionErrors) {
      if (!this.state.maybeInArrowParameters || !this.match(types$1.question)) {
        return super.parseConditional(expr, startPos, startLoc, refExpressionErrors);
      }
  
      const result = this.tryParse(() => super.parseConditional(expr, startPos, startLoc));
  
      if (!result.node) {
        if (result.error) {
          super.setOptionalParametersError(refExpressionErrors, result.error);
        }
  
        return expr;
      }
  
      if (result.error) this.state = result.failState;
      return result.node;
    }
  
    parseParenItem(node, startPos, startLoc) {
      node = super.parseParenItem(node, startPos, startLoc);
  
      if (this.eat(types$1.question)) {
        node.optional = true;
        this.resetEndLocation(node);
      }
  
      if (this.match(types$1.colon)) {
        const typeCastNode = this.startNodeAt(startPos, startLoc);
        typeCastNode.expression = node;
        typeCastNode.typeAnnotation = this.tsParseTypeAnnotation();
        return this.finishNode(typeCastNode, "TSTypeCastExpression");
      }
  
      return node;
    }
  
    parseExportDeclaration(node) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const isDeclare = this.eatContextual("declare");
  
      if (isDeclare && (this.isContextual("declare") || !this.shouldParseExportDeclaration())) {
        throw this.raise(this.state.start, TSErrors.ExpectedAmbientAfterExportDeclare);
      }
  
      let declaration;
  
      if (this.match(types$1.name)) {
        declaration = this.tsTryParseExportDeclaration();
      }
  
      if (!declaration) {
        declaration = super.parseExportDeclaration(node);
      }
  
      if (declaration && (declaration.type === "TSInterfaceDeclaration" || declaration.type === "TSTypeAliasDeclaration" || isDeclare)) {
        node.exportKind = "type";
      }
  
      if (declaration && isDeclare) {
        this.resetStartLocation(declaration, startPos, startLoc);
        declaration.declare = true;
      }
  
      return declaration;
    }
  
    parseClassId(node, isStatement, optionalId) {
      if ((!isStatement || optionalId) && this.isContextual("implements")) {
        return;
      }
  
      super.parseClassId(node, isStatement, optionalId, node.declare ? BIND_TS_AMBIENT : BIND_CLASS);
      const typeParameters = this.tsTryParseTypeParameters();
      if (typeParameters) node.typeParameters = typeParameters;
    }
  
    parseClassPropertyAnnotation(node) {
      if (!node.optional && this.eat(types$1.bang)) {
        node.definite = true;
      }
  
      const type = this.tsTryParseTypeAnnotation();
      if (type) node.typeAnnotation = type;
    }
  
    parseClassProperty(node) {
      this.parseClassPropertyAnnotation(node);
  
      if (this.state.isAmbientContext && this.match(types$1.eq)) {
        this.raise(this.state.start, TSErrors.DeclareClassFieldHasInitializer);
      }
  
      return super.parseClassProperty(node);
    }
  
    parseClassPrivateProperty(node) {
      if (node.abstract) {
        this.raise(node.start, TSErrors.PrivateElementHasAbstract);
      }
  
      if (node.accessibility) {
        this.raise(node.start, TSErrors.PrivateElementHasAccessibility, node.accessibility);
      }
  
      this.parseClassPropertyAnnotation(node);
      return super.parseClassPrivateProperty(node);
    }
  
    pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
      const typeParameters = this.tsTryParseTypeParameters();
  
      if (typeParameters && isConstructor) {
        this.raise(typeParameters.start, TSErrors.ConstructorHasTypeParameters);
      }
  
      if (method.declare && (method.kind === "get" || method.kind === "set")) {
        this.raise(method.start, TSErrors.DeclareAccessor, method.kind);
      }
  
      if (typeParameters) method.typeParameters = typeParameters;
      super.pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper);
    }
  
    pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
      const typeParameters = this.tsTryParseTypeParameters();
      if (typeParameters) method.typeParameters = typeParameters;
      super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync);
    }
  
    parseClassSuper(node) {
      super.parseClassSuper(node);
  
      if (node.superClass && this.isRelational("<")) {
        node.superTypeParameters = this.tsParseTypeArguments();
      }
  
      if (this.eatContextual("implements")) {
        node.implements = this.tsParseHeritageClause("implements");
      }
    }
  
    parseObjPropValue(prop, ...args) {
      const typeParameters = this.tsTryParseTypeParameters();
      if (typeParameters) prop.typeParameters = typeParameters;
      super.parseObjPropValue(prop, ...args);
    }
  
    parseFunctionParams(node, allowModifiers) {
      const typeParameters = this.tsTryParseTypeParameters();
      if (typeParameters) node.typeParameters = typeParameters;
      super.parseFunctionParams(node, allowModifiers);
    }
  
    parseVarId(decl, kind) {
      super.parseVarId(decl, kind);
  
      if (decl.id.type === "Identifier" && this.eat(types$1.bang)) {
        decl.definite = true;
      }
  
      const type = this.tsTryParseTypeAnnotation();
  
      if (type) {
        decl.id.typeAnnotation = type;
        this.resetEndLocation(decl.id);
      }
    }
  
    parseAsyncArrowFromCallExpression(node, call) {
      if (this.match(types$1.colon)) {
        node.returnType = this.tsParseTypeAnnotation();
      }
  
      return super.parseAsyncArrowFromCallExpression(node, call);
    }
  
    parseMaybeAssign(...args) {
      var _jsx, _jsx2, _typeCast, _jsx3, _typeCast2, _jsx4, _typeCast3;
  
      let state;
      let jsx;
      let typeCast;
  
      if (this.hasPlugin("jsx") && (this.match(types$1.jsxTagStart) || this.isRelational("<"))) {
        state = this.state.clone();
        jsx = this.tryParse(() => super.parseMaybeAssign(...args), state);
        if (!jsx.error) return jsx.node;
        const {
          context
        } = this.state;
  
        if (context[context.length - 1] === types.j_oTag) {
          context.length -= 2;
        } else if (context[context.length - 1] === types.j_expr) {
          context.length -= 1;
        }
      }
  
      if (!((_jsx = jsx) != null && _jsx.error) && !this.isRelational("<")) {
        return super.parseMaybeAssign(...args);
      }
  
      let typeParameters;
      state = state || this.state.clone();
      const arrow = this.tryParse(abort => {
        var _expr$extra, _typeParameters;
  
        typeParameters = this.tsParseTypeParameters();
        const expr = super.parseMaybeAssign(...args);
  
        if (expr.type !== "ArrowFunctionExpression" || (_expr$extra = expr.extra) != null && _expr$extra.parenthesized) {
          abort();
        }
  
        if (((_typeParameters = typeParameters) == null ? void 0 : _typeParameters.params.length) !== 0) {
          this.resetStartLocationFromNode(expr, typeParameters);
        }
  
        expr.typeParameters = typeParameters;
        return expr;
      }, state);
      if (!arrow.error && !arrow.aborted) return arrow.node;
  
      if (!jsx) {
        assert(!this.hasPlugin("jsx"));
        typeCast = this.tryParse(() => super.parseMaybeAssign(...args), state);
        if (!typeCast.error) return typeCast.node;
      }
  
      if ((_jsx2 = jsx) != null && _jsx2.node) {
        this.state = jsx.failState;
        return jsx.node;
      }
  
      if (arrow.node) {
        this.state = arrow.failState;
        return arrow.node;
      }
  
      if ((_typeCast = typeCast) != null && _typeCast.node) {
        this.state = typeCast.failState;
        return typeCast.node;
      }
  
      if ((_jsx3 = jsx) != null && _jsx3.thrown) throw jsx.error;
      if (arrow.thrown) throw arrow.error;
      if ((_typeCast2 = typeCast) != null && _typeCast2.thrown) throw typeCast.error;
      throw ((_jsx4 = jsx) == null ? void 0 : _jsx4.error) || arrow.error || ((_typeCast3 = typeCast) == null ? void 0 : _typeCast3.error);
    }
  
    parseMaybeUnary(refExpressionErrors) {
      if (!this.hasPlugin("jsx") && this.isRelational("<")) {
        return this.tsParseTypeAssertion();
      } else {
        return super.parseMaybeUnary(refExpressionErrors);
      }
    }
  
    parseArrow(node) {
      if (this.match(types$1.colon)) {
        const result = this.tryParse(abort => {
          const returnType = this.tsParseTypeOrTypePredicateAnnotation(types$1.colon);
          if (this.canInsertSemicolon() || !this.match(types$1.arrow)) abort();
          return returnType;
        });
        if (result.aborted) return;
  
        if (!result.thrown) {
          if (result.error) this.state = result.failState;
          node.returnType = result.node;
        }
      }
  
      return super.parseArrow(node);
    }
  
    parseAssignableListItemTypes(param) {
      if (this.eat(types$1.question)) {
        if (param.type !== "Identifier" && !this.state.isAmbientContext && !this.state.inType) {
          this.raise(param.start, TSErrors.PatternIsOptional);
        }
  
        param.optional = true;
      }
  
      const type = this.tsTryParseTypeAnnotation();
      if (type) param.typeAnnotation = type;
      this.resetEndLocation(param);
      return param;
    }
  
    toAssignable(node, isLHS = false) {
      switch (node.type) {
        case "TSTypeCastExpression":
          return super.toAssignable(this.typeCastToParameter(node), isLHS);
  
        case "TSParameterProperty":
          return super.toAssignable(node, isLHS);
  
        case "ParenthesizedExpression":
          return this.toAssignableParenthesizedExpression(node, isLHS);
  
        case "TSAsExpression":
        case "TSNonNullExpression":
        case "TSTypeAssertion":
          node.expression = this.toAssignable(node.expression, isLHS);
          return node;
  
        default:
          return super.toAssignable(node, isLHS);
      }
    }
  
    toAssignableParenthesizedExpression(node, isLHS) {
      switch (node.expression.type) {
        case "TSAsExpression":
        case "TSNonNullExpression":
        case "TSTypeAssertion":
        case "ParenthesizedExpression":
          node.expression = this.toAssignable(node.expression, isLHS);
          return node;
  
        default:
          return super.toAssignable(node, isLHS);
      }
    }
  
    checkLVal(expr, contextDescription, ...args) {
      var _expr$extra2;
  
      switch (expr.type) {
        case "TSTypeCastExpression":
          return;
  
        case "TSParameterProperty":
          this.checkLVal(expr.parameter, "parameter property", ...args);
          return;
  
        case "TSAsExpression":
        case "TSTypeAssertion":
          if (!args[0] && contextDescription !== "parenthesized expression" && !((_expr$extra2 = expr.extra) != null && _expr$extra2.parenthesized)) {
            this.raise(expr.start, ErrorMessages.InvalidLhs, contextDescription);
            break;
          }
  
          this.checkLVal(expr.expression, "parenthesized expression", ...args);
          return;
  
        case "TSNonNullExpression":
          this.checkLVal(expr.expression, contextDescription, ...args);
          return;
  
        default:
          super.checkLVal(expr, contextDescription, ...args);
          return;
      }
    }
  
    parseBindingAtom() {
      switch (this.state.type) {
        case types$1._this:
          return this.parseIdentifier(true);
  
        default:
          return super.parseBindingAtom();
      }
    }
  
    parseMaybeDecoratorArguments(expr) {
      if (this.isRelational("<")) {
        const typeArguments = this.tsParseTypeArguments();
  
        if (this.match(types$1.parenL)) {
          const call = super.parseMaybeDecoratorArguments(expr);
          call.typeParameters = typeArguments;
          return call;
        }
  
        this.unexpected(this.state.start, types$1.parenL);
      }
  
      return super.parseMaybeDecoratorArguments(expr);
    }
  
    checkCommaAfterRest(close) {
      if (this.state.isAmbientContext && this.match(types$1.comma) && this.lookaheadCharCode() === close) {
        this.next();
      } else {
        super.checkCommaAfterRest(close);
      }
    }
  
    isClassMethod() {
      return this.isRelational("<") || super.isClassMethod();
    }
  
    isClassProperty() {
      return this.match(types$1.bang) || this.match(types$1.colon) || super.isClassProperty();
    }
  
    parseMaybeDefault(...args) {
      const node = super.parseMaybeDefault(...args);
  
      if (node.type === "AssignmentPattern" && node.typeAnnotation && node.right.start < node.typeAnnotation.start) {
        this.raise(node.typeAnnotation.start, TSErrors.TypeAnnotationAfterAssign);
      }
  
      return node;
    }
  
    getTokenFromCode(code) {
      if (this.state.inType && (code === 62 || code === 60)) {
        return this.finishOp(types$1.relational, 1);
      } else {
        return super.getTokenFromCode(code);
      }
    }
  
    reScan_lt_gt() {
      if (this.match(types$1.relational)) {
        const code = this.input.charCodeAt(this.state.start);
  
        if (code === 60 || code === 62) {
          this.state.pos -= 1;
          this.readToken_lt_gt(code);
        }
      }
    }
  
    toAssignableList(exprList) {
      for (let i = 0; i < exprList.length; i++) {
        const expr = exprList[i];
        if (!expr) continue;
  
        switch (expr.type) {
          case "TSTypeCastExpression":
            exprList[i] = this.typeCastToParameter(expr);
            break;
  
          case "TSAsExpression":
          case "TSTypeAssertion":
            if (!this.state.maybeInArrowParameters) {
              exprList[i] = this.typeCastToParameter(expr);
            } else {
              this.raise(expr.start, TSErrors.UnexpectedTypeCastInParameter);
            }
  
            break;
        }
      }
  
      return super.toAssignableList(...arguments);
    }
  
    typeCastToParameter(node) {
      node.expression.typeAnnotation = node.typeAnnotation;
      this.resetEndLocation(node.expression, node.typeAnnotation.end, node.typeAnnotation.loc.end);
      return node.expression;
    }
  
    shouldParseArrow() {
      return this.match(types$1.colon) || super.shouldParseArrow();
    }
  
    shouldParseAsyncArrow() {
      return this.match(types$1.colon) || super.shouldParseAsyncArrow();
    }
  
    canHaveLeadingDecorator() {
      return super.canHaveLeadingDecorator() || this.isAbstractClass();
    }
  
    jsxParseOpeningElementAfterName(node) {
      if (this.isRelational("<")) {
        const typeArguments = this.tsTryParseAndCatch(() => this.tsParseTypeArguments());
        if (typeArguments) node.typeParameters = typeArguments;
      }
  
      return super.jsxParseOpeningElementAfterName(node);
    }
  
    getGetterSetterExpectedParamCount(method) {
      const baseCount = super.getGetterSetterExpectedParamCount(method);
      const params = this.getObjectOrClassMethodParams(method);
      const firstParam = params[0];
      const hasContextParam = firstParam && this.isThisParam(firstParam);
      return hasContextParam ? baseCount + 1 : baseCount;
    }
  
    parseCatchClauseParam() {
      const param = super.parseCatchClauseParam();
      const type = this.tsTryParseTypeAnnotation();
  
      if (type) {
        param.typeAnnotation = type;
        this.resetEndLocation(param);
      }
  
      return param;
    }
  
    tsInAmbientContext(cb) {
      const oldIsAmbientContext = this.state.isAmbientContext;
      this.state.isAmbientContext = true;
  
      try {
        return cb();
      } finally {
        this.state.isAmbientContext = oldIsAmbientContext;
      }
    }
  
    parseClass(node, ...args) {
      const oldInAbstractClass = this.state.inAbstractClass;
      this.state.inAbstractClass = !!node.abstract;
  
      try {
        return super.parseClass(node, ...args);
      } finally {
        this.state.inAbstractClass = oldInAbstractClass;
      }
    }
  
    tsParseAbstractDeclaration(node) {
      if (this.match(types$1._class)) {
        node.abstract = true;
        return this.parseClass(node, true, false);
      } else if (this.isContextual("interface")) {
        if (!this.hasFollowingLineBreak()) {
          node.abstract = true;
          this.raise(node.start, TSErrors.NonClassMethodPropertyHasAbstractModifer);
          this.next();
          return this.tsParseInterfaceDeclaration(node);
        }
      } else {
        this.unexpected(null, types$1._class);
      }
    }
  
    parseMethod(...args) {
      const method = super.parseMethod(...args);
  
      if (method.abstract) {
        const hasBody = this.hasPlugin("estree") ? !!method.value.body : !!method.body;
  
        if (hasBody) {
          const {
            key
          } = method;
          this.raise(method.start, TSErrors.AbstractMethodHasImplementation, key.type === "Identifier" ? key.name : `[${this.input.slice(key.start, key.end)}]`);
        }
      }
  
      return method;
    }
  
    tsParseTypeParameterName() {
      const typeName = this.parseIdentifier();
      return typeName.name;
    }
  
    shouldParseAsAmbientContext() {
      return !!this.getPluginOption("typescript", "dts");
    }
  
    parse() {
      if (this.shouldParseAsAmbientContext()) {
        this.state.isAmbientContext = true;
      }
  
      return super.parse();
    }
  
    getExpression() {
      if (this.shouldParseAsAmbientContext()) {
        this.state.isAmbientContext = true;
      }
  
      return super.getExpression();
    }
  
  });
  
  types$1.placeholder = new TokenType("%%", {
    startsExpr: true
  });
  const PlaceHolderErrors = makeErrorTemplates({
    ClassNameIsRequired: "A class name is required."
  }, ErrorCodes.SyntaxError);
  var placeholders = (superClass => class extends superClass {
    parsePlaceholder(expectedNode) {
      if (this.match(types$1.placeholder)) {
        const node = this.startNode();
        this.next();
        this.assertNoSpace("Unexpected space in placeholder.");
        node.name = super.parseIdentifier(true);
        this.assertNoSpace("Unexpected space in placeholder.");
        this.expect(types$1.placeholder);
        return this.finishPlaceholder(node, expectedNode);
      }
    }
  
    finishPlaceholder(node, expectedNode) {
      const isFinished = !!(node.expectedNode && node.type === "Placeholder");
      node.expectedNode = expectedNode;
      return isFinished ? node : this.finishNode(node, "Placeholder");
    }
  
    getTokenFromCode(code) {
      if (code === 37 && this.input.charCodeAt(this.state.pos + 1) === 37) {
        return this.finishOp(types$1.placeholder, 2);
      }
  
      return super.getTokenFromCode(...arguments);
    }
  
    parseExprAtom() {
      return this.parsePlaceholder("Expression") || super.parseExprAtom(...arguments);
    }
  
    parseIdentifier() {
      return this.parsePlaceholder("Identifier") || super.parseIdentifier(...arguments);
    }
  
    checkReservedWord(word) {
      if (word !== undefined) super.checkReservedWord(...arguments);
    }
  
    parseBindingAtom() {
      return this.parsePlaceholder("Pattern") || super.parseBindingAtom(...arguments);
    }
  
    checkLVal(expr) {
      if (expr.type !== "Placeholder") super.checkLVal(...arguments);
    }
  
    toAssignable(node) {
      if (node && node.type === "Placeholder" && node.expectedNode === "Expression") {
        node.expectedNode = "Pattern";
        return node;
      }
  
      return super.toAssignable(...arguments);
    }
  
    isLet(context) {
      if (super.isLet(context)) {
        return true;
      }
  
      if (!this.isContextual("let")) {
        return false;
      }
  
      if (context) return false;
      const nextToken = this.lookahead();
  
      if (nextToken.type === types$1.placeholder) {
        return true;
      }
  
      return false;
    }
  
    verifyBreakContinue(node) {
      if (node.label && node.label.type === "Placeholder") return;
      super.verifyBreakContinue(...arguments);
    }
  
    parseExpressionStatement(node, expr) {
      if (expr.type !== "Placeholder" || expr.extra && expr.extra.parenthesized) {
        return super.parseExpressionStatement(...arguments);
      }
  
      if (this.match(types$1.colon)) {
        const stmt = node;
        stmt.label = this.finishPlaceholder(expr, "Identifier");
        this.next();
        stmt.body = this.parseStatement("label");
        return this.finishNode(stmt, "LabeledStatement");
      }
  
      this.semicolon();
      node.name = expr.name;
      return this.finishPlaceholder(node, "Statement");
    }
  
    parseBlock() {
      return this.parsePlaceholder("BlockStatement") || super.parseBlock(...arguments);
    }
  
    parseFunctionId() {
      return this.parsePlaceholder("Identifier") || super.parseFunctionId(...arguments);
    }
  
    parseClass(node, isStatement, optionalId) {
      const type = isStatement ? "ClassDeclaration" : "ClassExpression";
      this.next();
      this.takeDecorators(node);
      const oldStrict = this.state.strict;
      const placeholder = this.parsePlaceholder("Identifier");
  
      if (placeholder) {
        if (this.match(types$1._extends) || this.match(types$1.placeholder) || this.match(types$1.braceL)) {
          node.id = placeholder;
        } else if (optionalId || !isStatement) {
          node.id = null;
          node.body = this.finishPlaceholder(placeholder, "ClassBody");
          return this.finishNode(node, type);
        } else {
          this.unexpected(null, PlaceHolderErrors.ClassNameIsRequired);
        }
      } else {
        this.parseClassId(node, isStatement, optionalId);
      }
  
      this.parseClassSuper(node);
      node.body = this.parsePlaceholder("ClassBody") || this.parseClassBody(!!node.superClass, oldStrict);
      return this.finishNode(node, type);
    }
  
    parseExport(node) {
      const placeholder = this.parsePlaceholder("Identifier");
      if (!placeholder) return super.parseExport(...arguments);
  
      if (!this.isContextual("from") && !this.match(types$1.comma)) {
        node.specifiers = [];
        node.source = null;
        node.declaration = this.finishPlaceholder(placeholder, "Declaration");
        return this.finishNode(node, "ExportNamedDeclaration");
      }
  
      this.expectPlugin("exportDefaultFrom");
      const specifier = this.startNode();
      specifier.exported = placeholder;
      node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")];
      return super.parseExport(node);
    }
  
    isExportDefaultSpecifier() {
      if (this.match(types$1._default)) {
        const next = this.nextTokenStart();
  
        if (this.isUnparsedContextual(next, "from")) {
          if (this.input.startsWith(types$1.placeholder.label, this.nextTokenStartSince(next + 4))) {
            return true;
          }
        }
      }
  
      return super.isExportDefaultSpecifier();
    }
  
    maybeParseExportDefaultSpecifier(node) {
      if (node.specifiers && node.specifiers.length > 0) {
        return true;
      }
  
      return super.maybeParseExportDefaultSpecifier(...arguments);
    }
  
    checkExport(node) {
      const {
        specifiers
      } = node;
  
      if (specifiers != null && specifiers.length) {
        node.specifiers = specifiers.filter(node => node.exported.type === "Placeholder");
      }
  
      super.checkExport(node);
      node.specifiers = specifiers;
    }
  
    parseImport(node) {
      const placeholder = this.parsePlaceholder("Identifier");
      if (!placeholder) return super.parseImport(...arguments);
      node.specifiers = [];
  
      if (!this.isContextual("from") && !this.match(types$1.comma)) {
        node.source = this.finishPlaceholder(placeholder, "StringLiteral");
        this.semicolon();
        return this.finishNode(node, "ImportDeclaration");
      }
  
      const specifier = this.startNodeAtNode(placeholder);
      specifier.local = placeholder;
      this.finishNode(specifier, "ImportDefaultSpecifier");
      node.specifiers.push(specifier);
  
      if (this.eat(types$1.comma)) {
        const hasStarImport = this.maybeParseStarImportSpecifier(node);
        if (!hasStarImport) this.parseNamedImportSpecifiers(node);
      }
  
      this.expectContextual("from");
      node.source = this.parseImportSource();
      this.semicolon();
      return this.finishNode(node, "ImportDeclaration");
    }
  
    parseImportSource() {
      return this.parsePlaceholder("StringLiteral") || super.parseImportSource(...arguments);
    }
  
  });
  
  var v8intrinsic = (superClass => class extends superClass {
    parseV8Intrinsic() {
      if (this.match(types$1.modulo)) {
        const v8IntrinsicStart = this.state.start;
        const node = this.startNode();
        this.eat(types$1.modulo);
  
        if (this.match(types$1.name)) {
          const name = this.parseIdentifierName(this.state.start);
          const identifier = this.createIdentifier(node, name);
          identifier.type = "V8IntrinsicIdentifier";
  
          if (this.match(types$1.parenL)) {
            return identifier;
          }
        }
  
        this.unexpected(v8IntrinsicStart);
      }
    }
  
    parseExprAtom() {
      return this.parseV8Intrinsic() || super.parseExprAtom(...arguments);
    }
  
  });
  
  function hasPlugin(plugins, name) {
    return plugins.some(plugin => {
      if (Array.isArray(plugin)) {
        return plugin[0] === name;
      } else {
        return plugin === name;
      }
    });
  }
  function getPluginOption(plugins, name, option) {
    const plugin = plugins.find(plugin => {
      if (Array.isArray(plugin)) {
        return plugin[0] === name;
      } else {
        return plugin === name;
      }
    });
  
    if (plugin && Array.isArray(plugin)) {
      return plugin[1][option];
    }
  
    return null;
  }
  const PIPELINE_PROPOSALS = ["minimal", "smart", "fsharp"];
  const RECORD_AND_TUPLE_SYNTAX_TYPES = ["hash", "bar"];
  function validatePlugins(plugins) {
    if (hasPlugin(plugins, "decorators")) {
      if (hasPlugin(plugins, "decorators-legacy")) {
        throw new Error("Cannot use the decorators and decorators-legacy plugin together");
      }
  
      const decoratorsBeforeExport = getPluginOption(plugins, "decorators", "decoratorsBeforeExport");
  
      if (decoratorsBeforeExport == null) {
        throw new Error("The 'decorators' plugin requires a 'decoratorsBeforeExport' option," + " whose value must be a boolean. If you are migrating from" + " Babylon/Babel 6 or want to use the old decorators proposal, you" + " should use the 'decorators-legacy' plugin instead of 'decorators'.");
      } else if (typeof decoratorsBeforeExport !== "boolean") {
        throw new Error("'decoratorsBeforeExport' must be a boolean.");
      }
    }
  
    if (hasPlugin(plugins, "flow") && hasPlugin(plugins, "typescript")) {
      throw new Error("Cannot combine flow and typescript plugins.");
    }
  
    if (hasPlugin(plugins, "placeholders") && hasPlugin(plugins, "v8intrinsic")) {
      throw new Error("Cannot combine placeholders and v8intrinsic plugins.");
    }
  
    if (hasPlugin(plugins, "pipelineOperator") && !PIPELINE_PROPOSALS.includes(getPluginOption(plugins, "pipelineOperator", "proposal"))) {
      throw new Error("'pipelineOperator' requires 'proposal' option whose value should be one of: " + PIPELINE_PROPOSALS.map(p => `'${p}'`).join(", "));
    }
  
    if (hasPlugin(plugins, "moduleAttributes")) {
      {
        if (hasPlugin(plugins, "importAssertions")) {
          throw new Error("Cannot combine importAssertions and moduleAttributes plugins.");
        }
  
        const moduleAttributesVerionPluginOption = getPluginOption(plugins, "moduleAttributes", "version");
  
        if (moduleAttributesVerionPluginOption !== "may-2020") {
          throw new Error("The 'moduleAttributes' plugin requires a 'version' option," + " representing the last proposal update. Currently, the" + " only supported value is 'may-2020'.");
        }
      }
    }
  
    if (hasPlugin(plugins, "recordAndTuple") && !RECORD_AND_TUPLE_SYNTAX_TYPES.includes(getPluginOption(plugins, "recordAndTuple", "syntaxType"))) {
      throw new Error("'recordAndTuple' requires 'syntaxType' option whose value should be one of: " + RECORD_AND_TUPLE_SYNTAX_TYPES.map(p => `'${p}'`).join(", "));
    }
  
    if (hasPlugin(plugins, "asyncDoExpressions") && !hasPlugin(plugins, "doExpressions")) {
      const error = new Error("'asyncDoExpressions' requires 'doExpressions', please add 'doExpressions' to parser plugins.");
      error.missingPlugins = "doExpressions";
      throw error;
    }
  }
  const mixinPlugins = {
    estree,
    jsx,
    flow,
    typescript,
    v8intrinsic,
    placeholders
  };
  const mixinPluginNames = Object.keys(mixinPlugins);
  
  const defaultOptions = {
    sourceType: "script",
    sourceFilename: undefined,
    startLine: 1,
    allowAwaitOutsideFunction: false,
    allowReturnOutsideFunction: false,
    allowImportExportEverywhere: false,
    allowSuperOutsideMethod: false,
    allowUndeclaredExports: false,
    plugins: [],
    strictMode: null,
    ranges: false,
    tokens: false,
    createParenthesizedExpressions: false,
    errorRecovery: false
  };
  function getOptions(opts) {
    const options = {};
  
    for (const key of Object.keys(defaultOptions)) {
      options[key] = opts && opts[key] != null ? opts[key] : defaultOptions[key];
    }
  
    return options;
  }
  
  var _isDigit = function isDigit(code) {
    return code >= 48 && code <= 57;
  };
  const VALID_REGEX_FLAGS = new Set([103, 109, 115, 105, 121, 117, 100]);
  const forbiddenNumericSeparatorSiblings = {
    decBinOct: [46, 66, 69, 79, 95, 98, 101, 111],
    hex: [46, 88, 95, 120]
  };
  const allowedNumericSeparatorSiblings = {};
  allowedNumericSeparatorSiblings.bin = [48, 49];
  allowedNumericSeparatorSiblings.oct = [...allowedNumericSeparatorSiblings.bin, 50, 51, 52, 53, 54, 55];
  allowedNumericSeparatorSiblings.dec = [...allowedNumericSeparatorSiblings.oct, 56, 57];
  allowedNumericSeparatorSiblings.hex = [...allowedNumericSeparatorSiblings.dec, 65, 66, 67, 68, 69, 70, 97, 98, 99, 100, 101, 102];
  class Token {
    constructor(state) {
      this.type = state.type;
      this.value = state.value;
      this.start = state.start;
      this.end = state.end;
      this.loc = new SourceLocation(state.startLoc, state.endLoc);
    }
  
  }
  class Tokenizer extends ParserError {
    constructor(options, input) {
      super();
      this.isLookahead = void 0;
      this.tokens = [];
      this.state = new State();
      this.state.init(options);
      this.input = input;
      this.length = input.length;
      this.isLookahead = false;
    }
  
    pushToken(token) {
      this.tokens.length = this.state.tokensLength;
      this.tokens.push(token);
      ++this.state.tokensLength;
    }
  
    next() {
      this.checkKeywordEscapes();
  
      if (this.options.tokens) {
        this.pushToken(new Token(this.state));
      }
  
      this.state.lastTokEnd = this.state.end;
      this.state.lastTokStart = this.state.start;
      this.state.lastTokEndLoc = this.state.endLoc;
      this.state.lastTokStartLoc = this.state.startLoc;
      this.nextToken();
    }
  
    eat(type) {
      if (this.match(type)) {
        this.next();
        return true;
      } else {
        return false;
      }
    }
  
    match(type) {
      return this.state.type === type;
    }
  
    createLookaheadState(state) {
      return {
        pos: state.pos,
        value: null,
        type: state.type,
        start: state.start,
        end: state.end,
        lastTokEnd: state.end,
        context: [this.curContext()],
        inType: state.inType
      };
    }
  
    lookahead() {
      const old = this.state;
      this.state = this.createLookaheadState(old);
      this.isLookahead = true;
      this.nextToken();
      this.isLookahead = false;
      const curr = this.state;
      this.state = old;
      return curr;
    }
  
    nextTokenStart() {
      return this.nextTokenStartSince(this.state.pos);
    }
  
    nextTokenStartSince(pos) {
      skipWhiteSpace.lastIndex = pos;
      const skip = skipWhiteSpace.exec(this.input);
      return pos + skip[0].length;
    }
  
    lookaheadCharCode() {
      return this.input.charCodeAt(this.nextTokenStart());
    }
  
    codePointAtPos(pos) {
      let cp = this.input.charCodeAt(pos);
  
      if ((cp & 0xfc00) === 0xd800 && ++pos < this.input.length) {
        const trail = this.input.charCodeAt(pos);
  
        if ((trail & 0xfc00) === 0xdc00) {
          cp = 0x10000 + ((cp & 0x3ff) << 10) + (trail & 0x3ff);
        }
      }
  
      return cp;
    }
  
    setStrict(strict) {
      this.state.strict = strict;
  
      if (strict) {
        this.state.strictErrors.forEach((message, pos) => this.raise(pos, message));
        this.state.strictErrors.clear();
      }
    }
  
    curContext() {
      return this.state.context[this.state.context.length - 1];
    }
  
    nextToken() {
      const curContext = this.curContext();
      if (!curContext.preserveSpace) this.skipSpace();
      this.state.start = this.state.pos;
      if (!this.isLookahead) this.state.startLoc = this.state.curPosition();
  
      if (this.state.pos >= this.length) {
        this.finishToken(types$1.eof);
        return;
      }
  
      if (curContext === types.template) {
        this.readTmplToken();
      } else {
        this.getTokenFromCode(this.codePointAtPos(this.state.pos));
      }
    }
  
    skipBlockComment() {
      let startLoc;
      if (!this.isLookahead) startLoc = this.state.curPosition();
      const start = this.state.pos;
      const end = this.input.indexOf("*/", this.state.pos + 2);
      if (end === -1) throw this.raise(start, ErrorMessages.UnterminatedComment);
      this.state.pos = end + 2;
      lineBreakG.lastIndex = start;
      let match;
  
      while ((match = lineBreakG.exec(this.input)) && match.index < this.state.pos) {
        ++this.state.curLine;
        this.state.lineStart = match.index + match[0].length;
      }
  
      if (this.isLookahead) return;
      const value = this.input.slice(start + 2, end);
      const comment = {
        type: "CommentBlock",
        value: value,
        start: start,
        end: end + 2,
        loc: new SourceLocation(startLoc, this.state.curPosition())
      };
      if (this.options.tokens) this.pushToken(comment);
      return comment;
    }
  
    skipLineComment(startSkip) {
      const start = this.state.pos;
      let startLoc;
      if (!this.isLookahead) startLoc = this.state.curPosition();
      let ch = this.input.charCodeAt(this.state.pos += startSkip);
  
      if (this.state.pos < this.length) {
        while (!isNewLine(ch) && ++this.state.pos < this.length) {
          ch = this.input.charCodeAt(this.state.pos);
        }
      }
  
      if (this.isLookahead) return;
      const end = this.state.pos;
      const value = this.input.slice(start + startSkip, end);
      const comment = {
        type: "CommentLine",
        value,
        start,
        end,
        loc: new SourceLocation(startLoc, this.state.curPosition())
      };
      if (this.options.tokens) this.pushToken(comment);
      return comment;
    }
  
    skipSpace() {
      const spaceStart = this.state.pos;
      const comments = [];
  
      loop: while (this.state.pos < this.length) {
        const ch = this.input.charCodeAt(this.state.pos);
  
        switch (ch) {
          case 32:
          case 160:
          case 9:
            ++this.state.pos;
            break;
  
          case 13:
            if (this.input.charCodeAt(this.state.pos + 1) === 10) {
              ++this.state.pos;
            }
  
          case 10:
          case 8232:
          case 8233:
            ++this.state.pos;
            ++this.state.curLine;
            this.state.lineStart = this.state.pos;
            break;
  
          case 47:
            switch (this.input.charCodeAt(this.state.pos + 1)) {
              case 42:
                {
                  const comment = this.skipBlockComment();
  
                  if (comment !== undefined) {
                    this.addComment(comment);
                    comments.push(comment);
                  }
  
                  break;
                }
  
              case 47:
                {
                  const comment = this.skipLineComment(2);
  
                  if (comment !== undefined) {
                    this.addComment(comment);
                    comments.push(comment);
                  }
  
                  break;
                }
  
              default:
                break loop;
            }
  
            break;
  
          default:
            if (isWhitespace(ch)) {
              ++this.state.pos;
            } else if (ch === 45 && !this.inModule) {
              const pos = this.state.pos;
  
              if (this.input.charCodeAt(pos + 1) === 45 && this.input.charCodeAt(pos + 2) === 62 && (spaceStart === 0 || this.state.lineStart > spaceStart)) {
                const comment = this.skipLineComment(3);
  
                if (comment !== undefined) {
                  this.addComment(comment);
                  comments.push(comment);
                }
              } else {
                break loop;
              }
            } else if (ch === 60 && !this.inModule) {
              const pos = this.state.pos;
  
              if (this.input.charCodeAt(pos + 1) === 33 && this.input.charCodeAt(pos + 2) === 45 && this.input.charCodeAt(pos + 3) === 45) {
                const comment = this.skipLineComment(4);
  
                if (comment !== undefined) {
                  this.addComment(comment);
                  comments.push(comment);
                }
              } else {
                break loop;
              }
            } else {
              break loop;
            }
  
        }
      }
  
      if (comments.length > 0) {
        const end = this.state.pos;
        const CommentWhitespace = {
          start: spaceStart,
          end,
          comments,
          leadingNode: null,
          trailingNode: null,
          containingNode: null
        };
        this.state.commentStack.push(CommentWhitespace);
      }
    }
  
    finishToken(type, val) {
      this.state.end = this.state.pos;
      const prevType = this.state.type;
      this.state.type = type;
      this.state.value = val;
  
      if (!this.isLookahead) {
        this.state.endLoc = this.state.curPosition();
        this.updateContext(prevType);
      }
    }
  
    readToken_numberSign() {
      if (this.state.pos === 0 && this.readToken_interpreter()) {
        return;
      }
  
      const nextPos = this.state.pos + 1;
      const next = this.codePointAtPos(nextPos);
  
      if (next >= 48 && next <= 57) {
        throw this.raise(this.state.pos, ErrorMessages.UnexpectedDigitAfterHash);
      }
  
      if (next === 123 || next === 91 && this.hasPlugin("recordAndTuple")) {
        this.expectPlugin("recordAndTuple");
  
        if (this.getPluginOption("recordAndTuple", "syntaxType") !== "hash") {
          throw this.raise(this.state.pos, next === 123 ? ErrorMessages.RecordExpressionHashIncorrectStartSyntaxType : ErrorMessages.TupleExpressionHashIncorrectStartSyntaxType);
        }
  
        this.state.pos += 2;
  
        if (next === 123) {
          this.finishToken(types$1.braceHashL);
        } else {
          this.finishToken(types$1.bracketHashL);
        }
      } else if (isIdentifierStart(next)) {
        ++this.state.pos;
        this.finishToken(types$1.privateName, this.readWord1(next));
      } else if (next === 92) {
        ++this.state.pos;
        this.finishToken(types$1.privateName, this.readWord1());
      } else {
        this.finishOp(types$1.hash, 1);
      }
    }
  
    readToken_dot() {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (next >= 48 && next <= 57) {
        this.readNumber(true);
        return;
      }
  
      if (next === 46 && this.input.charCodeAt(this.state.pos + 2) === 46) {
        this.state.pos += 3;
        this.finishToken(types$1.ellipsis);
      } else {
        ++this.state.pos;
        this.finishToken(types$1.dot);
      }
    }
  
    readToken_slash() {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (next === 61) {
        this.finishOp(types$1.slashAssign, 2);
      } else {
        this.finishOp(types$1.slash, 1);
      }
    }
  
    readToken_interpreter() {
      if (this.state.pos !== 0 || this.length < 2) return false;
      let ch = this.input.charCodeAt(this.state.pos + 1);
      if (ch !== 33) return false;
      const start = this.state.pos;
      this.state.pos += 1;
  
      while (!isNewLine(ch) && ++this.state.pos < this.length) {
        ch = this.input.charCodeAt(this.state.pos);
      }
  
      const value = this.input.slice(start + 2, this.state.pos);
      this.finishToken(types$1.interpreterDirective, value);
      return true;
    }
  
    readToken_mult_modulo(code) {
      let type = code === 42 ? types$1.star : types$1.modulo;
      let width = 1;
      let next = this.input.charCodeAt(this.state.pos + 1);
  
      if (code === 42 && next === 42) {
        width++;
        next = this.input.charCodeAt(this.state.pos + 2);
        type = types$1.exponent;
      }
  
      if (next === 61 && !this.state.inType) {
        width++;
        type = types$1.assign;
      }
  
      this.finishOp(type, width);
    }
  
    readToken_pipe_amp(code) {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (next === code) {
        if (this.input.charCodeAt(this.state.pos + 2) === 61) {
          this.finishOp(types$1.assign, 3);
        } else {
          this.finishOp(code === 124 ? types$1.logicalOR : types$1.logicalAND, 2);
        }
  
        return;
      }
  
      if (code === 124) {
        if (next === 62) {
          this.finishOp(types$1.pipeline, 2);
          return;
        }
  
        if (this.hasPlugin("recordAndTuple") && next === 125) {
          if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") {
            throw this.raise(this.state.pos, ErrorMessages.RecordExpressionBarIncorrectEndSyntaxType);
          }
  
          this.state.pos += 2;
          this.finishToken(types$1.braceBarR);
          return;
        }
  
        if (this.hasPlugin("recordAndTuple") && next === 93) {
          if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") {
            throw this.raise(this.state.pos, ErrorMessages.TupleExpressionBarIncorrectEndSyntaxType);
          }
  
          this.state.pos += 2;
          this.finishToken(types$1.bracketBarR);
          return;
        }
      }
  
      if (next === 61) {
        this.finishOp(types$1.assign, 2);
        return;
      }
  
      this.finishOp(code === 124 ? types$1.bitwiseOR : types$1.bitwiseAND, 1);
    }
  
    readToken_caret() {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (next === 61) {
        this.finishOp(types$1.assign, 2);
      } else {
        this.finishOp(types$1.bitwiseXOR, 1);
      }
    }
  
    readToken_plus_min(code) {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (next === code) {
        this.finishOp(types$1.incDec, 2);
        return;
      }
  
      if (next === 61) {
        this.finishOp(types$1.assign, 2);
      } else {
        this.finishOp(types$1.plusMin, 1);
      }
    }
  
    readToken_lt_gt(code) {
      const next = this.input.charCodeAt(this.state.pos + 1);
      let size = 1;
  
      if (next === code) {
        size = code === 62 && this.input.charCodeAt(this.state.pos + 2) === 62 ? 3 : 2;
  
        if (this.input.charCodeAt(this.state.pos + size) === 61) {
          this.finishOp(types$1.assign, size + 1);
          return;
        }
  
        this.finishOp(types$1.bitShift, size);
        return;
      }
  
      if (next === 61) {
        size = 2;
      }
  
      this.finishOp(types$1.relational, size);
    }
  
    readToken_eq_excl(code) {
      const next = this.input.charCodeAt(this.state.pos + 1);
  
      if (next === 61) {
        this.finishOp(types$1.equality, this.input.charCodeAt(this.state.pos + 2) === 61 ? 3 : 2);
        return;
      }
  
      if (code === 61 && next === 62) {
        this.state.pos += 2;
        this.finishToken(types$1.arrow);
        return;
      }
  
      this.finishOp(code === 61 ? types$1.eq : types$1.bang, 1);
    }
  
    readToken_question() {
      const next = this.input.charCodeAt(this.state.pos + 1);
      const next2 = this.input.charCodeAt(this.state.pos + 2);
  
      if (next === 63) {
        if (next2 === 61) {
          this.finishOp(types$1.assign, 3);
        } else {
          this.finishOp(types$1.nullishCoalescing, 2);
        }
      } else if (next === 46 && !(next2 >= 48 && next2 <= 57)) {
        this.state.pos += 2;
        this.finishToken(types$1.questionDot);
      } else {
        ++this.state.pos;
        this.finishToken(types$1.question);
      }
    }
  
    getTokenFromCode(code) {
      switch (code) {
        case 46:
          this.readToken_dot();
          return;
  
        case 40:
          ++this.state.pos;
          this.finishToken(types$1.parenL);
          return;
  
        case 41:
          ++this.state.pos;
          this.finishToken(types$1.parenR);
          return;
  
        case 59:
          ++this.state.pos;
          this.finishToken(types$1.semi);
          return;
  
        case 44:
          ++this.state.pos;
          this.finishToken(types$1.comma);
          return;
  
        case 91:
          if (this.hasPlugin("recordAndTuple") && this.input.charCodeAt(this.state.pos + 1) === 124) {
            if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") {
              throw this.raise(this.state.pos, ErrorMessages.TupleExpressionBarIncorrectStartSyntaxType);
            }
  
            this.state.pos += 2;
            this.finishToken(types$1.bracketBarL);
          } else {
            ++this.state.pos;
            this.finishToken(types$1.bracketL);
          }
  
          return;
  
        case 93:
          ++this.state.pos;
          this.finishToken(types$1.bracketR);
          return;
  
        case 123:
          if (this.hasPlugin("recordAndTuple") && this.input.charCodeAt(this.state.pos + 1) === 124) {
            if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") {
              throw this.raise(this.state.pos, ErrorMessages.RecordExpressionBarIncorrectStartSyntaxType);
            }
  
            this.state.pos += 2;
            this.finishToken(types$1.braceBarL);
          } else {
            ++this.state.pos;
            this.finishToken(types$1.braceL);
          }
  
          return;
  
        case 125:
          ++this.state.pos;
          this.finishToken(types$1.braceR);
          return;
  
        case 58:
          if (this.hasPlugin("functionBind") && this.input.charCodeAt(this.state.pos + 1) === 58) {
            this.finishOp(types$1.doubleColon, 2);
          } else {
            ++this.state.pos;
            this.finishToken(types$1.colon);
          }
  
          return;
  
        case 63:
          this.readToken_question();
          return;
  
        case 96:
          ++this.state.pos;
          this.finishToken(types$1.backQuote);
          return;
  
        case 48:
          {
            const next = this.input.charCodeAt(this.state.pos + 1);
  
            if (next === 120 || next === 88) {
              this.readRadixNumber(16);
              return;
            }
  
            if (next === 111 || next === 79) {
              this.readRadixNumber(8);
              return;
            }
  
            if (next === 98 || next === 66) {
              this.readRadixNumber(2);
              return;
            }
          }
  
        case 49:
        case 50:
        case 51:
        case 52:
        case 53:
        case 54:
        case 55:
        case 56:
        case 57:
          this.readNumber(false);
          return;
  
        case 34:
        case 39:
          this.readString(code);
          return;
  
        case 47:
          this.readToken_slash();
          return;
  
        case 37:
        case 42:
          this.readToken_mult_modulo(code);
          return;
  
        case 124:
        case 38:
          this.readToken_pipe_amp(code);
          return;
  
        case 94:
          this.readToken_caret();
          return;
  
        case 43:
        case 45:
          this.readToken_plus_min(code);
          return;
  
        case 60:
        case 62:
          this.readToken_lt_gt(code);
          return;
  
        case 61:
        case 33:
          this.readToken_eq_excl(code);
          return;
  
        case 126:
          this.finishOp(types$1.tilde, 1);
          return;
  
        case 64:
          ++this.state.pos;
          this.finishToken(types$1.at);
          return;
  
        case 35:
          this.readToken_numberSign();
          return;
  
        case 92:
          this.readWord();
          return;
  
        default:
          if (isIdentifierStart(code)) {
            this.readWord(code);
            return;
          }
  
      }
  
      throw this.raise(this.state.pos, ErrorMessages.InvalidOrUnexpectedToken, String.fromCodePoint(code));
    }
  
    finishOp(type, size) {
      const str = this.input.slice(this.state.pos, this.state.pos + size);
      this.state.pos += size;
      this.finishToken(type, str);
    }
  
    readRegexp() {
      const start = this.state.start + 1;
      let escaped, inClass;
      let {
        pos
      } = this.state;
  
      for (;; ++pos) {
        if (pos >= this.length) {
          throw this.raise(start, ErrorMessages.UnterminatedRegExp);
        }
  
        const ch = this.input.charCodeAt(pos);
  
        if (isNewLine(ch)) {
          throw this.raise(start, ErrorMessages.UnterminatedRegExp);
        }
  
        if (escaped) {
          escaped = false;
        } else {
          if (ch === 91) {
            inClass = true;
          } else if (ch === 93 && inClass) {
            inClass = false;
          } else if (ch === 47 && !inClass) {
            break;
          }
  
          escaped = ch === 92;
        }
      }
  
      const content = this.input.slice(start, pos);
      ++pos;
      let mods = "";
  
      while (pos < this.length) {
        const cp = this.codePointAtPos(pos);
        const char = String.fromCharCode(cp);
  
        if (VALID_REGEX_FLAGS.has(cp)) {
          if (mods.includes(char)) {
            this.raise(pos + 1, ErrorMessages.DuplicateRegExpFlags);
          }
        } else if (isIdentifierChar(cp) || cp === 92) {
          this.raise(pos + 1, ErrorMessages.MalformedRegExpFlags);
        } else {
          break;
        }
  
        ++pos;
        mods += char;
      }
  
      this.state.pos = pos;
      this.finishToken(types$1.regexp, {
        pattern: content,
        flags: mods
      });
    }
  
    readInt(radix, len, forceLen, allowNumSeparator = true) {
      const start = this.state.pos;
      const forbiddenSiblings = radix === 16 ? forbiddenNumericSeparatorSiblings.hex : forbiddenNumericSeparatorSiblings.decBinOct;
      const allowedSiblings = radix === 16 ? allowedNumericSeparatorSiblings.hex : radix === 10 ? allowedNumericSeparatorSiblings.dec : radix === 8 ? allowedNumericSeparatorSiblings.oct : allowedNumericSeparatorSiblings.bin;
      let invalid = false;
      let total = 0;
  
      for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
        const code = this.input.charCodeAt(this.state.pos);
        let val;
  
        if (code === 95) {
          const prev = this.input.charCodeAt(this.state.pos - 1);
          const next = this.input.charCodeAt(this.state.pos + 1);
  
          if (allowedSiblings.indexOf(next) === -1) {
            this.raise(this.state.pos, ErrorMessages.UnexpectedNumericSeparator);
          } else if (forbiddenSiblings.indexOf(prev) > -1 || forbiddenSiblings.indexOf(next) > -1 || Number.isNaN(next)) {
            this.raise(this.state.pos, ErrorMessages.UnexpectedNumericSeparator);
          }
  
          if (!allowNumSeparator) {
            this.raise(this.state.pos, ErrorMessages.NumericSeparatorInEscapeSequence);
          }
  
          ++this.state.pos;
          continue;
        }
  
        if (code >= 97) {
          val = code - 97 + 10;
        } else if (code >= 65) {
          val = code - 65 + 10;
        } else if (_isDigit(code)) {
          val = code - 48;
        } else {
          val = Infinity;
        }
  
        if (val >= radix) {
          if (this.options.errorRecovery && val <= 9) {
            val = 0;
            this.raise(this.state.start + i + 2, ErrorMessages.InvalidDigit, radix);
          } else if (forceLen) {
            val = 0;
            invalid = true;
          } else {
            break;
          }
        }
  
        ++this.state.pos;
        total = total * radix + val;
      }
  
      if (this.state.pos === start || len != null && this.state.pos - start !== len || invalid) {
        return null;
      }
  
      return total;
    }
  
    readRadixNumber(radix) {
      const start = this.state.pos;
      let isBigInt = false;
      this.state.pos += 2;
      const val = this.readInt(radix);
  
      if (val == null) {
        this.raise(this.state.start + 2, ErrorMessages.InvalidDigit, radix);
      }
  
      const next = this.input.charCodeAt(this.state.pos);
  
      if (next === 110) {
        ++this.state.pos;
        isBigInt = true;
      } else if (next === 109) {
        throw this.raise(start, ErrorMessages.InvalidDecimal);
      }
  
      if (isIdentifierStart(this.codePointAtPos(this.state.pos))) {
        throw this.raise(this.state.pos, ErrorMessages.NumberIdentifier);
      }
  
      if (isBigInt) {
        const str = this.input.slice(start, this.state.pos).replace(/[_n]/g, "");
        this.finishToken(types$1.bigint, str);
        return;
      }
  
      this.finishToken(types$1.num, val);
    }
  
    readNumber(startsWithDot) {
      const start = this.state.pos;
      let isFloat = false;
      let isBigInt = false;
      let isDecimal = false;
      let hasExponent = false;
      let isOctal = false;
  
      if (!startsWithDot && this.readInt(10) === null) {
        this.raise(start, ErrorMessages.InvalidNumber);
      }
  
      const hasLeadingZero = this.state.pos - start >= 2 && this.input.charCodeAt(start) === 48;
  
      if (hasLeadingZero) {
        const integer = this.input.slice(start, this.state.pos);
        this.recordStrictModeErrors(start, ErrorMessages.StrictOctalLiteral);
  
        if (!this.state.strict) {
          const underscorePos = integer.indexOf("_");
  
          if (underscorePos > 0) {
            this.raise(underscorePos + start, ErrorMessages.ZeroDigitNumericSeparator);
          }
        }
  
        isOctal = hasLeadingZero && !/[89]/.test(integer);
      }
  
      let next = this.input.charCodeAt(this.state.pos);
  
      if (next === 46 && !isOctal) {
        ++this.state.pos;
        this.readInt(10);
        isFloat = true;
        next = this.input.charCodeAt(this.state.pos);
      }
  
      if ((next === 69 || next === 101) && !isOctal) {
        next = this.input.charCodeAt(++this.state.pos);
  
        if (next === 43 || next === 45) {
          ++this.state.pos;
        }
  
        if (this.readInt(10) === null) {
          this.raise(start, ErrorMessages.InvalidOrMissingExponent);
        }
  
        isFloat = true;
        hasExponent = true;
        next = this.input.charCodeAt(this.state.pos);
      }
  
      if (next === 110) {
        if (isFloat || hasLeadingZero) {
          this.raise(start, ErrorMessages.InvalidBigIntLiteral);
        }
  
        ++this.state.pos;
        isBigInt = true;
      }
  
      if (next === 109) {
        this.expectPlugin("decimal", this.state.pos);
  
        if (hasExponent || hasLeadingZero) {
          this.raise(start, ErrorMessages.InvalidDecimal);
        }
  
        ++this.state.pos;
        isDecimal = true;
      }
  
      if (isIdentifierStart(this.codePointAtPos(this.state.pos))) {
        throw this.raise(this.state.pos, ErrorMessages.NumberIdentifier);
      }
  
      const str = this.input.slice(start, this.state.pos).replace(/[_mn]/g, "");
  
      if (isBigInt) {
        this.finishToken(types$1.bigint, str);
        return;
      }
  
      if (isDecimal) {
        this.finishToken(types$1.decimal, str);
        return;
      }
  
      const val = isOctal ? parseInt(str, 8) : parseFloat(str);
      this.finishToken(types$1.num, val);
    }
  
    readCodePoint(throwOnInvalid) {
      const ch = this.input.charCodeAt(this.state.pos);
      let code;
  
      if (ch === 123) {
        const codePos = ++this.state.pos;
        code = this.readHexChar(this.input.indexOf("}", this.state.pos) - this.state.pos, true, throwOnInvalid);
        ++this.state.pos;
  
        if (code !== null && code > 0x10ffff) {
          if (throwOnInvalid) {
            this.raise(codePos, ErrorMessages.InvalidCodePoint);
          } else {
            return null;
          }
        }
      } else {
        code = this.readHexChar(4, false, throwOnInvalid);
      }
  
      return code;
    }
  
    readString(quote) {
      let out = "",
          chunkStart = ++this.state.pos;
  
      for (;;) {
        if (this.state.pos >= this.length) {
          throw this.raise(this.state.start, ErrorMessages.UnterminatedString);
        }
  
        const ch = this.input.charCodeAt(this.state.pos);
        if (ch === quote) break;
  
        if (ch === 92) {
          out += this.input.slice(chunkStart, this.state.pos);
          out += this.readEscapedChar(false);
          chunkStart = this.state.pos;
        } else if (ch === 8232 || ch === 8233) {
          ++this.state.pos;
          ++this.state.curLine;
          this.state.lineStart = this.state.pos;
        } else if (isNewLine(ch)) {
          throw this.raise(this.state.start, ErrorMessages.UnterminatedString);
        } else {
          ++this.state.pos;
        }
      }
  
      out += this.input.slice(chunkStart, this.state.pos++);
      this.finishToken(types$1.string, out);
    }
  
    readTmplToken() {
      let out = "",
          chunkStart = this.state.pos,
          containsInvalid = false;
  
      for (;;) {
        if (this.state.pos >= this.length) {
          throw this.raise(this.state.start, ErrorMessages.UnterminatedTemplate);
        }
  
        const ch = this.input.charCodeAt(this.state.pos);
  
        if (ch === 96 || ch === 36 && this.input.charCodeAt(this.state.pos + 1) === 123) {
          if (this.state.pos === this.state.start && this.match(types$1.template)) {
            if (ch === 36) {
              this.state.pos += 2;
              this.finishToken(types$1.dollarBraceL);
              return;
            } else {
              ++this.state.pos;
              this.finishToken(types$1.backQuote);
              return;
            }
          }
  
          out += this.input.slice(chunkStart, this.state.pos);
          this.finishToken(types$1.template, containsInvalid ? null : out);
          return;
        }
  
        if (ch === 92) {
          out += this.input.slice(chunkStart, this.state.pos);
          const escaped = this.readEscapedChar(true);
  
          if (escaped === null) {
            containsInvalid = true;
          } else {
            out += escaped;
          }
  
          chunkStart = this.state.pos;
        } else if (isNewLine(ch)) {
          out += this.input.slice(chunkStart, this.state.pos);
          ++this.state.pos;
  
          switch (ch) {
            case 13:
              if (this.input.charCodeAt(this.state.pos) === 10) {
                ++this.state.pos;
              }
  
            case 10:
              out += "\n";
              break;
  
            default:
              out += String.fromCharCode(ch);
              break;
          }
  
          ++this.state.curLine;
          this.state.lineStart = this.state.pos;
          chunkStart = this.state.pos;
        } else {
          ++this.state.pos;
        }
      }
    }
  
    recordStrictModeErrors(pos, message) {
      if (this.state.strict && !this.state.strictErrors.has(pos)) {
        this.raise(pos, message);
      } else {
        this.state.strictErrors.set(pos, message);
      }
    }
  
    readEscapedChar(inTemplate) {
      const throwOnInvalid = !inTemplate;
      const ch = this.input.charCodeAt(++this.state.pos);
      ++this.state.pos;
  
      switch (ch) {
        case 110:
          return "\n";
  
        case 114:
          return "\r";
  
        case 120:
          {
            const code = this.readHexChar(2, false, throwOnInvalid);
            return code === null ? null : String.fromCharCode(code);
          }
  
        case 117:
          {
            const code = this.readCodePoint(throwOnInvalid);
            return code === null ? null : String.fromCodePoint(code);
          }
  
        case 116:
          return "\t";
  
        case 98:
          return "\b";
  
        case 118:
          return "\u000b";
  
        case 102:
          return "\f";
  
        case 13:
          if (this.input.charCodeAt(this.state.pos) === 10) {
            ++this.state.pos;
          }
  
        case 10:
          this.state.lineStart = this.state.pos;
          ++this.state.curLine;
  
        case 8232:
        case 8233:
          return "";
  
        case 56:
        case 57:
          if (inTemplate) {
            return null;
          } else {
            this.recordStrictModeErrors(this.state.pos - 1, ErrorMessages.StrictNumericEscape);
          }
  
        default:
          if (ch >= 48 && ch <= 55) {
            const codePos = this.state.pos - 1;
            const match = this.input.substr(this.state.pos - 1, 3).match(/^[0-7]+/);
            let octalStr = match[0];
            let octal = parseInt(octalStr, 8);
  
            if (octal > 255) {
              octalStr = octalStr.slice(0, -1);
              octal = parseInt(octalStr, 8);
            }
  
            this.state.pos += octalStr.length - 1;
            const next = this.input.charCodeAt(this.state.pos);
  
            if (octalStr !== "0" || next === 56 || next === 57) {
              if (inTemplate) {
                return null;
              } else {
                this.recordStrictModeErrors(codePos, ErrorMessages.StrictNumericEscape);
              }
            }
  
            return String.fromCharCode(octal);
          }
  
          return String.fromCharCode(ch);
      }
    }
  
    readHexChar(len, forceLen, throwOnInvalid) {
      const codePos = this.state.pos;
      const n = this.readInt(16, len, forceLen, false);
  
      if (n === null) {
        if (throwOnInvalid) {
          this.raise(codePos, ErrorMessages.InvalidEscapeSequence);
        } else {
          this.state.pos = codePos - 1;
        }
      }
  
      return n;
    }
  
    readWord1(firstCode) {
      this.state.containsEsc = false;
      let word = "";
      const start = this.state.pos;
      let chunkStart = this.state.pos;
  
      if (firstCode !== undefined) {
        this.state.pos += firstCode <= 0xffff ? 1 : 2;
      }
  
      while (this.state.pos < this.length) {
        const ch = this.codePointAtPos(this.state.pos);
  
        if (isIdentifierChar(ch)) {
          this.state.pos += ch <= 0xffff ? 1 : 2;
        } else if (ch === 92) {
          this.state.containsEsc = true;
          word += this.input.slice(chunkStart, this.state.pos);
          const escStart = this.state.pos;
          const identifierCheck = this.state.pos === start ? isIdentifierStart : isIdentifierChar;
  
          if (this.input.charCodeAt(++this.state.pos) !== 117) {
            this.raise(this.state.pos, ErrorMessages.MissingUnicodeEscape);
            chunkStart = this.state.pos - 1;
            continue;
          }
  
          ++this.state.pos;
          const esc = this.readCodePoint(true);
  
          if (esc !== null) {
            if (!identifierCheck(esc)) {
              this.raise(escStart, ErrorMessages.EscapedCharNotAnIdentifier);
            }
  
            word += String.fromCodePoint(esc);
          }
  
          chunkStart = this.state.pos;
        } else {
          break;
        }
      }
  
      return word + this.input.slice(chunkStart, this.state.pos);
    }
  
    readWord(firstCode) {
      const word = this.readWord1(firstCode);
      const type = keywords$1.get(word) || types$1.name;
      this.finishToken(type, word);
    }
  
    checkKeywordEscapes() {
      const kw = this.state.type.keyword;
  
      if (kw && this.state.containsEsc) {
        this.raise(this.state.start, ErrorMessages.InvalidEscapedReservedWord, kw);
      }
    }
  
    updateContext(prevType) {
      var _this$state$type$upda, _this$state$type;
  
      (_this$state$type$upda = (_this$state$type = this.state.type).updateContext) == null ? void 0 : _this$state$type$upda.call(_this$state$type, this.state.context);
    }
  
  }
  
  class ClassScope {
    constructor() {
      this.privateNames = new Set();
      this.loneAccessors = new Map();
      this.undefinedPrivateNames = new Map();
    }
  
  }
  class ClassScopeHandler {
    constructor(raise) {
      this.stack = [];
      this.undefinedPrivateNames = new Map();
      this.raise = raise;
    }
  
    current() {
      return this.stack[this.stack.length - 1];
    }
  
    enter() {
      this.stack.push(new ClassScope());
    }
  
    exit() {
      const oldClassScope = this.stack.pop();
      const current = this.current();
  
      for (const [name, pos] of Array.from(oldClassScope.undefinedPrivateNames)) {
        if (current) {
          if (!current.undefinedPrivateNames.has(name)) {
            current.undefinedPrivateNames.set(name, pos);
          }
        } else {
          this.raise(pos, ErrorMessages.InvalidPrivateFieldResolution, name);
        }
      }
    }
  
    declarePrivateName(name, elementType, pos) {
      const classScope = this.current();
      let redefined = classScope.privateNames.has(name);
  
      if (elementType & CLASS_ELEMENT_KIND_ACCESSOR) {
        const accessor = redefined && classScope.loneAccessors.get(name);
  
        if (accessor) {
          const oldStatic = accessor & CLASS_ELEMENT_FLAG_STATIC;
          const newStatic = elementType & CLASS_ELEMENT_FLAG_STATIC;
          const oldKind = accessor & CLASS_ELEMENT_KIND_ACCESSOR;
          const newKind = elementType & CLASS_ELEMENT_KIND_ACCESSOR;
          redefined = oldKind === newKind || oldStatic !== newStatic;
          if (!redefined) classScope.loneAccessors.delete(name);
        } else if (!redefined) {
          classScope.loneAccessors.set(name, elementType);
        }
      }
  
      if (redefined) {
        this.raise(pos, ErrorMessages.PrivateNameRedeclaration, name);
      }
  
      classScope.privateNames.add(name);
      classScope.undefinedPrivateNames.delete(name);
    }
  
    usePrivateName(name, pos) {
      let classScope;
  
      for (classScope of this.stack) {
        if (classScope.privateNames.has(name)) return;
      }
  
      if (classScope) {
        classScope.undefinedPrivateNames.set(name, pos);
      } else {
        this.raise(pos, ErrorMessages.InvalidPrivateFieldResolution, name);
      }
    }
  
  }
  
  const kExpression = 0,
        kMaybeArrowParameterDeclaration = 1,
        kMaybeAsyncArrowParameterDeclaration = 2,
        kParameterDeclaration = 3;
  
  class ExpressionScope {
    constructor(type = kExpression) {
      this.type = void 0;
      this.type = type;
    }
  
    canBeArrowParameterDeclaration() {
      return this.type === kMaybeAsyncArrowParameterDeclaration || this.type === kMaybeArrowParameterDeclaration;
    }
  
    isCertainlyParameterDeclaration() {
      return this.type === kParameterDeclaration;
    }
  
  }
  
  class ArrowHeadParsingScope extends ExpressionScope {
    constructor(type) {
      super(type);
      this.errors = new Map();
    }
  
    recordDeclarationError(pos, template) {
      this.errors.set(pos, template);
    }
  
    clearDeclarationError(pos) {
      this.errors.delete(pos);
    }
  
    iterateErrors(iterator) {
      this.errors.forEach(iterator);
    }
  
  }
  
  class ExpressionScopeHandler {
    constructor(raise) {
      this.stack = [new ExpressionScope()];
      this.raise = raise;
    }
  
    enter(scope) {
      this.stack.push(scope);
    }
  
    exit() {
      this.stack.pop();
    }
  
    recordParameterInitializerError(pos, template) {
      const {
        stack
      } = this;
      let i = stack.length - 1;
      let scope = stack[i];
  
      while (!scope.isCertainlyParameterDeclaration()) {
        if (scope.canBeArrowParameterDeclaration()) {
          scope.recordDeclarationError(pos, template);
        } else {
          return;
        }
  
        scope = stack[--i];
      }
  
      this.raise(pos, template);
    }
  
    recordParenthesizedIdentifierError(pos, template) {
      const {
        stack
      } = this;
      const scope = stack[stack.length - 1];
  
      if (scope.isCertainlyParameterDeclaration()) {
        this.raise(pos, template);
      } else if (scope.canBeArrowParameterDeclaration()) {
        scope.recordDeclarationError(pos, template);
      } else {
        return;
      }
    }
  
    recordAsyncArrowParametersError(pos, template) {
      const {
        stack
      } = this;
      let i = stack.length - 1;
      let scope = stack[i];
  
      while (scope.canBeArrowParameterDeclaration()) {
        if (scope.type === kMaybeAsyncArrowParameterDeclaration) {
          scope.recordDeclarationError(pos, template);
        }
  
        scope = stack[--i];
      }
    }
  
    validateAsPattern() {
      const {
        stack
      } = this;
      const currentScope = stack[stack.length - 1];
      if (!currentScope.canBeArrowParameterDeclaration()) return;
      currentScope.iterateErrors((template, pos) => {
        this.raise(pos, template);
        let i = stack.length - 2;
        let scope = stack[i];
  
        while (scope.canBeArrowParameterDeclaration()) {
          scope.clearDeclarationError(pos);
          scope = stack[--i];
        }
      });
    }
  
  }
  function newParameterDeclarationScope() {
    return new ExpressionScope(kParameterDeclaration);
  }
  function newArrowHeadScope() {
    return new ArrowHeadParsingScope(kMaybeArrowParameterDeclaration);
  }
  function newAsyncArrowScope() {
    return new ArrowHeadParsingScope(kMaybeAsyncArrowParameterDeclaration);
  }
  function newExpressionScope() {
    return new ExpressionScope();
  }
  
  class UtilParser extends Tokenizer {
    addExtra(node, key, val) {
      if (!node) return;
      const extra = node.extra = node.extra || {};
      extra[key] = val;
    }
  
    isRelational(op) {
      return this.match(types$1.relational) && this.state.value === op;
    }
  
    expectRelational(op) {
      if (this.isRelational(op)) {
        this.next();
      } else {
        this.unexpected(null, types$1.relational);
      }
    }
  
    isContextual(name) {
      return this.match(types$1.name) && this.state.value === name && !this.state.containsEsc;
    }
  
    isUnparsedContextual(nameStart, name) {
      const nameEnd = nameStart + name.length;
  
      if (this.input.slice(nameStart, nameEnd) === name) {
        const nextCh = this.input.charCodeAt(nameEnd);
        return !(isIdentifierChar(nextCh) || (nextCh & 0xfc00) === 0xd800);
      }
  
      return false;
    }
  
    isLookaheadContextual(name) {
      const next = this.nextTokenStart();
      return this.isUnparsedContextual(next, name);
    }
  
    eatContextual(name) {
      return this.isContextual(name) && this.eat(types$1.name);
    }
  
    expectContextual(name, template) {
      if (!this.eatContextual(name)) this.unexpected(null, template);
    }
  
    canInsertSemicolon() {
      return this.match(types$1.eof) || this.match(types$1.braceR) || this.hasPrecedingLineBreak();
    }
  
    hasPrecedingLineBreak() {
      return lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start));
    }
  
    hasFollowingLineBreak() {
      return lineBreak.test(this.input.slice(this.state.end, this.nextTokenStart()));
    }
  
    isLineTerminator() {
      return this.eat(types$1.semi) || this.canInsertSemicolon();
    }
  
    semicolon(allowAsi = true) {
      if (allowAsi ? this.isLineTerminator() : this.eat(types$1.semi)) return;
      this.raise(this.state.lastTokEnd, ErrorMessages.MissingSemicolon);
    }
  
    expect(type, pos) {
      this.eat(type) || this.unexpected(pos, type);
    }
  
    assertNoSpace(message = "Unexpected space.") {
      if (this.state.start > this.state.lastTokEnd) {
        this.raise(this.state.lastTokEnd, {
          code: ErrorCodes.SyntaxError,
          reasonCode: "UnexpectedSpace",
          template: message
        });
      }
    }
  
    unexpected(pos, messageOrType = {
      code: ErrorCodes.SyntaxError,
      reasonCode: "UnexpectedToken",
      template: "Unexpected token"
    }) {
      if (messageOrType instanceof TokenType) {
        messageOrType = {
          code: ErrorCodes.SyntaxError,
          reasonCode: "UnexpectedToken",
          template: `Unexpected token, expected "${messageOrType.label}"`
        };
      }
  
      throw this.raise(pos != null ? pos : this.state.start, messageOrType);
    }
  
    expectPlugin(name, pos) {
      if (!this.hasPlugin(name)) {
        throw this.raiseWithData(pos != null ? pos : this.state.start, {
          missingPlugin: [name]
        }, `This experimental syntax requires enabling the parser plugin: '${name}'`);
      }
  
      return true;
    }
  
    expectOnePlugin(names, pos) {
      if (!names.some(n => this.hasPlugin(n))) {
        throw this.raiseWithData(pos != null ? pos : this.state.start, {
          missingPlugin: names
        }, `This experimental syntax requires enabling one of the following parser plugin(s): '${names.join(", ")}'`);
      }
    }
  
    tryParse(fn, oldState = this.state.clone()) {
      const abortSignal = {
        node: null
      };
  
      try {
        const node = fn((node = null) => {
          abortSignal.node = node;
          throw abortSignal;
        });
  
        if (this.state.errors.length > oldState.errors.length) {
          const failState = this.state;
          this.state = oldState;
          this.state.tokensLength = failState.tokensLength;
          return {
            node,
            error: failState.errors[oldState.errors.length],
            thrown: false,
            aborted: false,
            failState
          };
        }
  
        return {
          node,
          error: null,
          thrown: false,
          aborted: false,
          failState: null
        };
      } catch (error) {
        const failState = this.state;
        this.state = oldState;
  
        if (error instanceof SyntaxError) {
          return {
            node: null,
            error,
            thrown: true,
            aborted: false,
            failState
          };
        }
  
        if (error === abortSignal) {
          return {
            node: abortSignal.node,
            error: null,
            thrown: false,
            aborted: true,
            failState
          };
        }
  
        throw error;
      }
    }
  
    checkExpressionErrors(refExpressionErrors, andThrow) {
      if (!refExpressionErrors) return false;
      const {
        shorthandAssign,
        doubleProto,
        optionalParameters
      } = refExpressionErrors;
  
      if (!andThrow) {
        return shorthandAssign >= 0 || doubleProto >= 0 || optionalParameters >= 0;
      }
  
      if (shorthandAssign >= 0) {
        this.unexpected(shorthandAssign);
      }
  
      if (doubleProto >= 0) {
        this.raise(doubleProto, ErrorMessages.DuplicateProto);
      }
  
      if (optionalParameters >= 0) {
        this.unexpected(optionalParameters);
      }
    }
  
    isLiteralPropertyName() {
      return this.match(types$1.name) || !!this.state.type.keyword || this.match(types$1.string) || this.match(types$1.num) || this.match(types$1.bigint) || this.match(types$1.decimal);
    }
  
    isPrivateName(node) {
      return node.type === "PrivateName";
    }
  
    getPrivateNameSV(node) {
      return node.id.name;
    }
  
    hasPropertyAsPrivateName(node) {
      return (node.type === "MemberExpression" || node.type === "OptionalMemberExpression") && this.isPrivateName(node.property);
    }
  
    isOptionalChain(node) {
      return node.type === "OptionalMemberExpression" || node.type === "OptionalCallExpression";
    }
  
    isObjectProperty(node) {
      return node.type === "ObjectProperty";
    }
  
    isObjectMethod(node) {
      return node.type === "ObjectMethod";
    }
  
    initializeScopes(inModule = this.options.sourceType === "module") {
      const oldLabels = this.state.labels;
      this.state.labels = [];
      const oldExportedIdentifiers = this.exportedIdentifiers;
      this.exportedIdentifiers = new Set();
      const oldInModule = this.inModule;
      this.inModule = inModule;
      const oldScope = this.scope;
      const ScopeHandler = this.getScopeHandler();
      this.scope = new ScopeHandler(this.raise.bind(this), this.inModule);
      const oldProdParam = this.prodParam;
      this.prodParam = new ProductionParameterHandler();
      const oldClassScope = this.classScope;
      this.classScope = new ClassScopeHandler(this.raise.bind(this));
      const oldExpressionScope = this.expressionScope;
      this.expressionScope = new ExpressionScopeHandler(this.raise.bind(this));
      return () => {
        this.state.labels = oldLabels;
        this.exportedIdentifiers = oldExportedIdentifiers;
        this.inModule = oldInModule;
        this.scope = oldScope;
        this.prodParam = oldProdParam;
        this.classScope = oldClassScope;
        this.expressionScope = oldExpressionScope;
      };
    }
  
    enterInitialScopes() {
      let paramFlags = PARAM;
  
      if (this.hasPlugin("topLevelAwait") && this.inModule) {
        paramFlags |= PARAM_AWAIT;
      }
  
      this.scope.enter(SCOPE_PROGRAM);
      this.prodParam.enter(paramFlags);
    }
  
  }
  class ExpressionErrors {
    constructor() {
      this.shorthandAssign = -1;
      this.doubleProto = -1;
      this.optionalParameters = -1;
    }
  
  }
  
  class Node {
    constructor(parser, pos, loc) {
      this.type = void 0;
      this.start = void 0;
      this.end = void 0;
      this.loc = void 0;
      this.range = void 0;
      this.leadingComments = void 0;
      this.trailingComments = void 0;
      this.innerComments = void 0;
      this.extra = void 0;
      this.type = "";
      this.start = pos;
      this.end = 0;
      this.loc = new SourceLocation(loc);
      if (parser != null && parser.options.ranges) this.range = [pos, 0];
      if (parser != null && parser.filename) this.loc.filename = parser.filename;
    }
  
    __clone() {
      const newNode = new Node();
      const keys = Object.keys(this);
  
      for (let i = 0, length = keys.length; i < length; i++) {
        const key = keys[i];
  
        if (key !== "leadingComments" && key !== "trailingComments" && key !== "innerComments") {
          newNode[key] = this[key];
        }
      }
  
      return newNode;
    }
  
  }
  
  class NodeUtils extends UtilParser {
    startNode() {
      return new Node(this, this.state.start, this.state.startLoc);
    }
  
    startNodeAt(pos, loc) {
      return new Node(this, pos, loc);
    }
  
    startNodeAtNode(type) {
      return this.startNodeAt(type.start, type.loc.start);
    }
  
    finishNode(node, type) {
      return this.finishNodeAt(node, type, this.state.lastTokEnd, this.state.lastTokEndLoc);
    }
  
    finishNodeAt(node, type, pos, loc) {
  
      node.type = type;
      node.end = pos;
      node.loc.end = loc;
      if (this.options.ranges) node.range[1] = pos;
      this.processComment(node);
      return node;
    }
  
    resetStartLocation(node, start, startLoc) {
      node.start = start;
      node.loc.start = startLoc;
      if (this.options.ranges) node.range[0] = start;
    }
  
    resetEndLocation(node, end = this.state.lastTokEnd, endLoc = this.state.lastTokEndLoc) {
      node.end = end;
      node.loc.end = endLoc;
      if (this.options.ranges) node.range[1] = end;
    }
  
    resetStartLocationFromNode(node, locationNode) {
      this.resetStartLocation(node, locationNode.start, locationNode.loc.start);
    }
  
  }
  
  const unwrapParenthesizedExpression = node => {
    return node.type === "ParenthesizedExpression" ? unwrapParenthesizedExpression(node.expression) : node;
  };
  
  class LValParser extends NodeUtils {
    toAssignable(node, isLHS = false) {
      var _node$extra, _node$extra3;
  
      let parenthesized = undefined;
  
      if (node.type === "ParenthesizedExpression" || (_node$extra = node.extra) != null && _node$extra.parenthesized) {
        parenthesized = unwrapParenthesizedExpression(node);
  
        if (isLHS) {
          if (parenthesized.type === "Identifier") {
            this.expressionScope.recordParenthesizedIdentifierError(node.start, ErrorMessages.InvalidParenthesizedAssignment);
          } else if (parenthesized.type !== "MemberExpression") {
            this.raise(node.start, ErrorMessages.InvalidParenthesizedAssignment);
          }
        } else {
          this.raise(node.start, ErrorMessages.InvalidParenthesizedAssignment);
        }
      }
  
      switch (node.type) {
        case "Identifier":
        case "ObjectPattern":
        case "ArrayPattern":
        case "AssignmentPattern":
          break;
  
        case "ObjectExpression":
          node.type = "ObjectPattern";
  
          for (let i = 0, length = node.properties.length, last = length - 1; i < length; i++) {
            var _node$extra2;
  
            const prop = node.properties[i];
            const isLast = i === last;
            this.toAssignableObjectExpressionProp(prop, isLast, isLHS);
  
            if (isLast && prop.type === "RestElement" && (_node$extra2 = node.extra) != null && _node$extra2.trailingComma) {
              this.raiseRestNotLast(node.extra.trailingComma);
            }
          }
  
          break;
  
        case "ObjectProperty":
          this.toAssignable(node.value, isLHS);
          break;
  
        case "SpreadElement":
          {
            this.checkToRestConversion(node);
            node.type = "RestElement";
            const arg = node.argument;
            this.toAssignable(arg, isLHS);
            break;
          }
  
        case "ArrayExpression":
          node.type = "ArrayPattern";
          this.toAssignableList(node.elements, (_node$extra3 = node.extra) == null ? void 0 : _node$extra3.trailingComma, isLHS);
          break;
  
        case "AssignmentExpression":
          if (node.operator !== "=") {
            this.raise(node.left.end, ErrorMessages.MissingEqInAssignment);
          }
  
          node.type = "AssignmentPattern";
          delete node.operator;
          this.toAssignable(node.left, isLHS);
          break;
  
        case "ParenthesizedExpression":
          this.toAssignable(parenthesized, isLHS);
          break;
      }
  
      return node;
    }
  
    toAssignableObjectExpressionProp(prop, isLast, isLHS) {
      if (prop.type === "ObjectMethod") {
        const error = prop.kind === "get" || prop.kind === "set" ? ErrorMessages.PatternHasAccessor : ErrorMessages.PatternHasMethod;
        this.raise(prop.key.start, error);
      } else if (prop.type === "SpreadElement" && !isLast) {
        this.raiseRestNotLast(prop.start);
      } else {
        this.toAssignable(prop, isLHS);
      }
    }
  
    toAssignableList(exprList, trailingCommaPos, isLHS) {
      let end = exprList.length;
  
      if (end) {
        const last = exprList[end - 1];
  
        if ((last == null ? void 0 : last.type) === "RestElement") {
          --end;
        } else if ((last == null ? void 0 : last.type) === "SpreadElement") {
          last.type = "RestElement";
          let arg = last.argument;
          this.toAssignable(arg, isLHS);
          arg = unwrapParenthesizedExpression(arg);
  
          if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern" && arg.type !== "ObjectPattern") {
            this.unexpected(arg.start);
          }
  
          if (trailingCommaPos) {
            this.raiseTrailingCommaAfterRest(trailingCommaPos);
          }
  
          --end;
        }
      }
  
      for (let i = 0; i < end; i++) {
        const elt = exprList[i];
  
        if (elt) {
          this.toAssignable(elt, isLHS);
  
          if (elt.type === "RestElement") {
            this.raiseRestNotLast(elt.start);
          }
        }
      }
  
      return exprList;
    }
  
    toReferencedList(exprList, isParenthesizedExpr) {
      return exprList;
    }
  
    toReferencedListDeep(exprList, isParenthesizedExpr) {
      this.toReferencedList(exprList, isParenthesizedExpr);
  
      for (const expr of exprList) {
        if ((expr == null ? void 0 : expr.type) === "ArrayExpression") {
          this.toReferencedListDeep(expr.elements);
        }
      }
    }
  
    parseSpread(refExpressionErrors, refNeedsArrowPos) {
      const node = this.startNode();
      this.next();
      node.argument = this.parseMaybeAssignAllowIn(refExpressionErrors, undefined, refNeedsArrowPos);
      return this.finishNode(node, "SpreadElement");
    }
  
    parseRestBinding() {
      const node = this.startNode();
      this.next();
      node.argument = this.parseBindingAtom();
      return this.finishNode(node, "RestElement");
    }
  
    parseBindingAtom() {
      switch (this.state.type) {
        case types$1.bracketL:
          {
            const node = this.startNode();
            this.next();
            node.elements = this.parseBindingList(types$1.bracketR, 93, true);
            return this.finishNode(node, "ArrayPattern");
          }
  
        case types$1.braceL:
          return this.parseObjectLike(types$1.braceR, true);
      }
  
      return this.parseIdentifier();
    }
  
    parseBindingList(close, closeCharCode, allowEmpty, allowModifiers) {
      const elts = [];
      let first = true;
  
      while (!this.eat(close)) {
        if (first) {
          first = false;
        } else {
          this.expect(types$1.comma);
        }
  
        if (allowEmpty && this.match(types$1.comma)) {
          elts.push(null);
        } else if (this.eat(close)) {
          break;
        } else if (this.match(types$1.ellipsis)) {
          elts.push(this.parseAssignableListItemTypes(this.parseRestBinding()));
          this.checkCommaAfterRest(closeCharCode);
          this.expect(close);
          break;
        } else {
          const decorators = [];
  
          if (this.match(types$1.at) && this.hasPlugin("decorators")) {
            this.raise(this.state.start, ErrorMessages.UnsupportedParameterDecorator);
          }
  
          while (this.match(types$1.at)) {
            decorators.push(this.parseDecorator());
          }
  
          elts.push(this.parseAssignableListItem(allowModifiers, decorators));
        }
      }
  
      return elts;
    }
  
    parseAssignableListItem(allowModifiers, decorators) {
      const left = this.parseMaybeDefault();
      this.parseAssignableListItemTypes(left);
      const elt = this.parseMaybeDefault(left.start, left.loc.start, left);
  
      if (decorators.length) {
        left.decorators = decorators;
      }
  
      return elt;
    }
  
    parseAssignableListItemTypes(param) {
      return param;
    }
  
    parseMaybeDefault(startPos, startLoc, left) {
      var _startLoc, _startPos, _left;
  
      startLoc = (_startLoc = startLoc) != null ? _startLoc : this.state.startLoc;
      startPos = (_startPos = startPos) != null ? _startPos : this.state.start;
      left = (_left = left) != null ? _left : this.parseBindingAtom();
      if (!this.eat(types$1.eq)) return left;
      const node = this.startNodeAt(startPos, startLoc);
      node.left = left;
      node.right = this.parseMaybeAssignAllowIn();
      return this.finishNode(node, "AssignmentPattern");
    }
  
    checkLVal(expr, contextDescription, bindingType = BIND_NONE, checkClashes, disallowLetBinding, strictModeChanged = false) {
      switch (expr.type) {
        case "Identifier":
          {
            const {
              name
            } = expr;
  
            if (this.state.strict && (strictModeChanged ? isStrictBindReservedWord(name, this.inModule) : isStrictBindOnlyReservedWord(name))) {
              this.raise(expr.start, bindingType === BIND_NONE ? ErrorMessages.StrictEvalArguments : ErrorMessages.StrictEvalArgumentsBinding, name);
            }
  
            if (checkClashes) {
              if (checkClashes.has(name)) {
                this.raise(expr.start, ErrorMessages.ParamDupe);
              } else {
                checkClashes.add(name);
              }
            }
  
            if (disallowLetBinding && name === "let") {
              this.raise(expr.start, ErrorMessages.LetInLexicalBinding);
            }
  
            if (!(bindingType & BIND_NONE)) {
              this.scope.declareName(name, bindingType, expr.start);
            }
  
            break;
          }
  
        case "MemberExpression":
          if (bindingType !== BIND_NONE) {
            this.raise(expr.start, ErrorMessages.InvalidPropertyBindingPattern);
          }
  
          break;
  
        case "ObjectPattern":
          for (let prop of expr.properties) {
            if (this.isObjectProperty(prop)) prop = prop.value;else if (this.isObjectMethod(prop)) continue;
            this.checkLVal(prop, "object destructuring pattern", bindingType, checkClashes, disallowLetBinding);
          }
  
          break;
  
        case "ArrayPattern":
          for (const elem of expr.elements) {
            if (elem) {
              this.checkLVal(elem, "array destructuring pattern", bindingType, checkClashes, disallowLetBinding);
            }
          }
  
          break;
  
        case "AssignmentPattern":
          this.checkLVal(expr.left, "assignment pattern", bindingType, checkClashes);
          break;
  
        case "RestElement":
          this.checkLVal(expr.argument, "rest element", bindingType, checkClashes);
          break;
  
        case "ParenthesizedExpression":
          this.checkLVal(expr.expression, "parenthesized expression", bindingType, checkClashes);
          break;
  
        default:
          {
            this.raise(expr.start, bindingType === BIND_NONE ? ErrorMessages.InvalidLhs : ErrorMessages.InvalidLhsBinding, contextDescription);
          }
      }
    }
  
    checkToRestConversion(node) {
      if (node.argument.type !== "Identifier" && node.argument.type !== "MemberExpression") {
        this.raise(node.argument.start, ErrorMessages.InvalidRestAssignmentPattern);
      }
    }
  
    checkCommaAfterRest(close) {
      if (this.match(types$1.comma)) {
        if (this.lookaheadCharCode() === close) {
          this.raiseTrailingCommaAfterRest(this.state.start);
        } else {
          this.raiseRestNotLast(this.state.start);
        }
      }
    }
  
    raiseRestNotLast(pos) {
      throw this.raise(pos, ErrorMessages.ElementAfterRest);
    }
  
    raiseTrailingCommaAfterRest(pos) {
      this.raise(pos, ErrorMessages.RestTrailingComma);
    }
  
  }
  
  class ExpressionParser extends LValParser {
    checkProto(prop, isRecord, protoRef, refExpressionErrors) {
      if (prop.type === "SpreadElement" || this.isObjectMethod(prop) || prop.computed || prop.shorthand) {
        return;
      }
  
      const key = prop.key;
      const name = key.type === "Identifier" ? key.name : key.value;
  
      if (name === "__proto__") {
        if (isRecord) {
          this.raise(key.start, ErrorMessages.RecordNoProto);
          return;
        }
  
        if (protoRef.used) {
          if (refExpressionErrors) {
            if (refExpressionErrors.doubleProto === -1) {
              refExpressionErrors.doubleProto = key.start;
            }
          } else {
            this.raise(key.start, ErrorMessages.DuplicateProto);
          }
        }
  
        protoRef.used = true;
      }
    }
  
    shouldExitDescending(expr, potentialArrowAt) {
      return expr.type === "ArrowFunctionExpression" && expr.start === potentialArrowAt;
    }
  
    getExpression() {
      let paramFlags = PARAM;
  
      if (this.hasPlugin("topLevelAwait") && this.inModule) {
        paramFlags |= PARAM_AWAIT;
      }
  
      this.scope.enter(SCOPE_PROGRAM);
      this.prodParam.enter(paramFlags);
      this.nextToken();
      const expr = this.parseExpression();
  
      if (!this.match(types$1.eof)) {
        this.unexpected();
      }
  
      this.finalizeRemainingComments();
      expr.comments = this.state.comments;
      expr.errors = this.state.errors;
  
      if (this.options.tokens) {
        expr.tokens = this.tokens;
      }
  
      return expr;
    }
  
    parseExpression(disallowIn, refExpressionErrors) {
      if (disallowIn) {
        return this.disallowInAnd(() => this.parseExpressionBase(refExpressionErrors));
      }
  
      return this.allowInAnd(() => this.parseExpressionBase(refExpressionErrors));
    }
  
    parseExpressionBase(refExpressionErrors) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const expr = this.parseMaybeAssign(refExpressionErrors);
  
      if (this.match(types$1.comma)) {
        const node = this.startNodeAt(startPos, startLoc);
        node.expressions = [expr];
  
        while (this.eat(types$1.comma)) {
          node.expressions.push(this.parseMaybeAssign(refExpressionErrors));
        }
  
        this.toReferencedList(node.expressions);
        return this.finishNode(node, "SequenceExpression");
      }
  
      return expr;
    }
  
    parseMaybeAssignDisallowIn(refExpressionErrors, afterLeftParse) {
      return this.disallowInAnd(() => this.parseMaybeAssign(refExpressionErrors, afterLeftParse));
    }
  
    parseMaybeAssignAllowIn(refExpressionErrors, afterLeftParse) {
      return this.allowInAnd(() => this.parseMaybeAssign(refExpressionErrors, afterLeftParse));
    }
  
    setOptionalParametersError(refExpressionErrors, resultError) {
      var _resultError$pos;
  
      refExpressionErrors.optionalParameters = (_resultError$pos = resultError == null ? void 0 : resultError.pos) != null ? _resultError$pos : this.state.start;
    }
  
    parseMaybeAssign(refExpressionErrors, afterLeftParse) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
  
      if (this.isContextual("yield")) {
        if (this.prodParam.hasYield) {
          let left = this.parseYield();
  
          if (afterLeftParse) {
            left = afterLeftParse.call(this, left, startPos, startLoc);
          }
  
          return left;
        }
      }
  
      let ownExpressionErrors;
  
      if (refExpressionErrors) {
        ownExpressionErrors = false;
      } else {
        refExpressionErrors = new ExpressionErrors();
        ownExpressionErrors = true;
      }
  
      if (this.match(types$1.parenL) || this.match(types$1.name)) {
        this.state.potentialArrowAt = this.state.start;
      }
  
      let left = this.parseMaybeConditional(refExpressionErrors);
  
      if (afterLeftParse) {
        left = afterLeftParse.call(this, left, startPos, startLoc);
      }
  
      if (this.state.type.isAssign) {
        const node = this.startNodeAt(startPos, startLoc);
        const operator = this.state.value;
        node.operator = operator;
  
        if (this.match(types$1.eq)) {
          node.left = this.toAssignable(left, true);
          refExpressionErrors.doubleProto = -1;
        } else {
          node.left = left;
        }
  
        if (refExpressionErrors.shorthandAssign >= node.left.start) {
          refExpressionErrors.shorthandAssign = -1;
        }
  
        this.checkLVal(left, "assignment expression");
        this.next();
        node.right = this.parseMaybeAssign();
        return this.finishNode(node, "AssignmentExpression");
      } else if (ownExpressionErrors) {
        this.checkExpressionErrors(refExpressionErrors, true);
      }
  
      return left;
    }
  
    parseMaybeConditional(refExpressionErrors) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const potentialArrowAt = this.state.potentialArrowAt;
      const expr = this.parseExprOps(refExpressionErrors);
  
      if (this.shouldExitDescending(expr, potentialArrowAt)) {
        return expr;
      }
  
      return this.parseConditional(expr, startPos, startLoc, refExpressionErrors);
    }
  
    parseConditional(expr, startPos, startLoc, refExpressionErrors) {
      if (this.eat(types$1.question)) {
        const node = this.startNodeAt(startPos, startLoc);
        node.test = expr;
        node.consequent = this.parseMaybeAssignAllowIn();
        this.expect(types$1.colon);
        node.alternate = this.parseMaybeAssign();
        return this.finishNode(node, "ConditionalExpression");
      }
  
      return expr;
    }
  
    parseExprOps(refExpressionErrors) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const potentialArrowAt = this.state.potentialArrowAt;
      const expr = this.parseMaybeUnary(refExpressionErrors);
  
      if (this.shouldExitDescending(expr, potentialArrowAt)) {
        return expr;
      }
  
      return this.parseExprOp(expr, startPos, startLoc, -1);
    }
  
    parseExprOp(left, leftStartPos, leftStartLoc, minPrec) {
      let prec = this.state.type.binop;
  
      if (prec != null && (this.prodParam.hasIn || !this.match(types$1._in))) {
        if (prec > minPrec) {
          const op = this.state.type;
  
          if (op === types$1.pipeline) {
            this.expectPlugin("pipelineOperator");
  
            if (this.state.inFSharpPipelineDirectBody) {
              return left;
            }
  
            this.state.inPipeline = true;
            this.checkPipelineAtInfixOperator(left, leftStartPos);
          }
  
          const node = this.startNodeAt(leftStartPos, leftStartLoc);
          node.left = left;
          node.operator = this.state.value;
          const logical = op === types$1.logicalOR || op === types$1.logicalAND;
          const coalesce = op === types$1.nullishCoalescing;
  
          if (coalesce) {
            prec = types$1.logicalAND.binop;
          }
  
          this.next();
  
          if (op === types$1.pipeline && this.getPluginOption("pipelineOperator", "proposal") === "minimal") {
            if (this.match(types$1.name) && this.state.value === "await" && this.prodParam.hasAwait) {
              throw this.raise(this.state.start, ErrorMessages.UnexpectedAwaitAfterPipelineBody);
            }
          }
  
          node.right = this.parseExprOpRightExpr(op, prec);
          this.finishNode(node, logical || coalesce ? "LogicalExpression" : "BinaryExpression");
          const nextOp = this.state.type;
  
          if (coalesce && (nextOp === types$1.logicalOR || nextOp === types$1.logicalAND) || logical && nextOp === types$1.nullishCoalescing) {
            throw this.raise(this.state.start, ErrorMessages.MixingCoalesceWithLogical);
          }
  
          return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec);
        }
      }
  
      return left;
    }
  
    parseExprOpRightExpr(op, prec) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
  
      switch (op) {
        case types$1.pipeline:
          switch (this.getPluginOption("pipelineOperator", "proposal")) {
            case "smart":
              return this.withTopicPermittingContext(() => {
                return this.parseSmartPipelineBody(this.parseExprOpBaseRightExpr(op, prec), startPos, startLoc);
              });
  
            case "fsharp":
              return this.withSoloAwaitPermittingContext(() => {
                return this.parseFSharpPipelineBody(prec);
              });
          }
  
        default:
          return this.parseExprOpBaseRightExpr(op, prec);
      }
    }
  
    parseExprOpBaseRightExpr(op, prec) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      return this.parseExprOp(this.parseMaybeUnary(), startPos, startLoc, op.rightAssociative ? prec - 1 : prec);
    }
  
    checkExponentialAfterUnary(node) {
      if (this.match(types$1.exponent)) {
        this.raise(node.argument.start, ErrorMessages.UnexpectedTokenUnaryExponentiation);
      }
    }
  
    parseMaybeUnary(refExpressionErrors, sawUnary) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const isAwait = this.isContextual("await");
  
      if (isAwait && this.isAwaitAllowed()) {
        this.next();
        const expr = this.parseAwait(startPos, startLoc);
        if (!sawUnary) this.checkExponentialAfterUnary(expr);
        return expr;
      }
  
      const update = this.match(types$1.incDec);
      const node = this.startNode();
  
      if (this.state.type.prefix) {
        node.operator = this.state.value;
        node.prefix = true;
  
        if (this.match(types$1._throw)) {
          this.expectPlugin("throwExpressions");
        }
  
        const isDelete = this.match(types$1._delete);
        this.next();
        node.argument = this.parseMaybeUnary(null, true);
        this.checkExpressionErrors(refExpressionErrors, true);
  
        if (this.state.strict && isDelete) {
          const arg = node.argument;
  
          if (arg.type === "Identifier") {
            this.raise(node.start, ErrorMessages.StrictDelete);
          } else if (this.hasPropertyAsPrivateName(arg)) {
            this.raise(node.start, ErrorMessages.DeletePrivateField);
          }
        }
  
        if (!update) {
          if (!sawUnary) this.checkExponentialAfterUnary(node);
          return this.finishNode(node, "UnaryExpression");
        }
      }
  
      const expr = this.parseUpdate(node, update, refExpressionErrors);
  
      if (isAwait) {
        const startsExpr = this.hasPlugin("v8intrinsic") ? this.state.type.startsExpr : this.state.type.startsExpr && !this.match(types$1.modulo);
  
        if (startsExpr && !this.isAmbiguousAwait()) {
          this.raiseOverwrite(startPos, this.hasPlugin("topLevelAwait") ? ErrorMessages.AwaitNotInAsyncContext : ErrorMessages.AwaitNotInAsyncFunction);
          return this.parseAwait(startPos, startLoc);
        }
      }
  
      return expr;
    }
  
    parseUpdate(node, update, refExpressionErrors) {
      if (update) {
        this.checkLVal(node.argument, "prefix operation");
        return this.finishNode(node, "UpdateExpression");
      }
  
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      let expr = this.parseExprSubscripts(refExpressionErrors);
      if (this.checkExpressionErrors(refExpressionErrors, false)) return expr;
  
      while (this.state.type.postfix && !this.canInsertSemicolon()) {
        const node = this.startNodeAt(startPos, startLoc);
        node.operator = this.state.value;
        node.prefix = false;
        node.argument = expr;
        this.checkLVal(expr, "postfix operation");
        this.next();
        expr = this.finishNode(node, "UpdateExpression");
      }
  
      return expr;
    }
  
    parseExprSubscripts(refExpressionErrors) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      const potentialArrowAt = this.state.potentialArrowAt;
      const expr = this.parseExprAtom(refExpressionErrors);
  
      if (this.shouldExitDescending(expr, potentialArrowAt)) {
        return expr;
      }
  
      return this.parseSubscripts(expr, startPos, startLoc);
    }
  
    parseSubscripts(base, startPos, startLoc, noCalls) {
      const state = {
        optionalChainMember: false,
        maybeAsyncArrow: this.atPossibleAsyncArrow(base),
        stop: false
      };
  
      do {
        base = this.parseSubscript(base, startPos, startLoc, noCalls, state);
        state.maybeAsyncArrow = false;
      } while (!state.stop);
  
      return base;
    }
  
    parseSubscript(base, startPos, startLoc, noCalls, state) {
      if (!noCalls && this.eat(types$1.doubleColon)) {
        return this.parseBind(base, startPos, startLoc, noCalls, state);
      } else if (this.match(types$1.backQuote)) {
        return this.parseTaggedTemplateExpression(base, startPos, startLoc, state);
      }
  
      let optional = false;
  
      if (this.match(types$1.questionDot)) {
        if (noCalls && this.lookaheadCharCode() === 40) {
          state.stop = true;
          return base;
        }
  
        state.optionalChainMember = optional = true;
        this.next();
      }
  
      if (!noCalls && this.match(types$1.parenL)) {
        return this.parseCoverCallAndAsyncArrowHead(base, startPos, startLoc, state, optional);
      } else if (optional || this.match(types$1.bracketL) || this.eat(types$1.dot)) {
        return this.parseMember(base, startPos, startLoc, state, optional);
      } else {
        state.stop = true;
        return base;
      }
    }
  
    parseMember(base, startPos, startLoc, state, optional) {
      const node = this.startNodeAt(startPos, startLoc);
      const computed = this.eat(types$1.bracketL);
      node.object = base;
      node.computed = computed;
      const privateName = !computed && this.match(types$1.privateName) && this.state.value;
      const property = computed ? this.parseExpression() : privateName ? this.parsePrivateName() : this.parseIdentifier(true);
  
      if (privateName !== false) {
        if (node.object.type === "Super") {
          this.raise(startPos, ErrorMessages.SuperPrivateField);
        }
  
        this.classScope.usePrivateName(privateName, property.start);
      }
  
      node.property = property;
  
      if (computed) {
        this.expect(types$1.bracketR);
      }
  
      if (state.optionalChainMember) {
        node.optional = optional;
        return this.finishNode(node, "OptionalMemberExpression");
      } else {
        return this.finishNode(node, "MemberExpression");
      }
    }
  
    parseBind(base, startPos, startLoc, noCalls, state) {
      const node = this.startNodeAt(startPos, startLoc);
      node.object = base;
      node.callee = this.parseNoCallExpr();
      state.stop = true;
      return this.parseSubscripts(this.finishNode(node, "BindExpression"), startPos, startLoc, noCalls);
    }
  
    parseCoverCallAndAsyncArrowHead(base, startPos, startLoc, state, optional) {
      const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
      let refExpressionErrors = null;
      this.state.maybeInArrowParameters = true;
      this.next();
      let node = this.startNodeAt(startPos, startLoc);
      node.callee = base;
  
      if (state.maybeAsyncArrow) {
        this.expressionScope.enter(newAsyncArrowScope());
        refExpressionErrors = new ExpressionErrors();
      }
  
      if (state.optionalChainMember) {
        node.optional = optional;
      }
  
      if (optional) {
        node.arguments = this.parseCallExpressionArguments(types$1.parenR);
      } else {
        node.arguments = this.parseCallExpressionArguments(types$1.parenR, base.type === "Import", base.type !== "Super", node, refExpressionErrors);
      }
  
      this.finishCallExpression(node, state.optionalChainMember);
  
      if (state.maybeAsyncArrow && this.shouldParseAsyncArrow() && !optional) {
        state.stop = true;
        this.expressionScope.validateAsPattern();
        this.expressionScope.exit();
        node = this.parseAsyncArrowFromCallExpression(this.startNodeAt(startPos, startLoc), node);
      } else {
        if (state.maybeAsyncArrow) {
          this.checkExpressionErrors(refExpressionErrors, true);
          this.expressionScope.exit();
        }
  
        this.toReferencedArguments(node);
      }
  
      this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
      return node;
    }
  
    toReferencedArguments(node, isParenthesizedExpr) {
      this.toReferencedListDeep(node.arguments, isParenthesizedExpr);
    }
  
    parseTaggedTemplateExpression(base, startPos, startLoc, state) {
      const node = this.startNodeAt(startPos, startLoc);
      node.tag = base;
      node.quasi = this.parseTemplate(true);
  
      if (state.optionalChainMember) {
        this.raise(startPos, ErrorMessages.OptionalChainingNoTemplate);
      }
  
      return this.finishNode(node, "TaggedTemplateExpression");
    }
  
    atPossibleAsyncArrow(base) {
      return base.type === "Identifier" && base.name === "async" && this.state.lastTokEnd === base.end && !this.canInsertSemicolon() && base.end - base.start === 5 && base.start === this.state.potentialArrowAt;
    }
  
    finishCallExpression(node, optional) {
      if (node.callee.type === "Import") {
        if (node.arguments.length === 2) {
          {
            if (!this.hasPlugin("moduleAttributes")) {
              this.expectPlugin("importAssertions");
            }
          }
        }
  
        if (node.arguments.length === 0 || node.arguments.length > 2) {
          this.raise(node.start, ErrorMessages.ImportCallArity, this.hasPlugin("importAssertions") || this.hasPlugin("moduleAttributes") ? "one or two arguments" : "one argument");
        } else {
          for (const arg of node.arguments) {
            if (arg.type === "SpreadElement") {
              this.raise(arg.start, ErrorMessages.ImportCallSpreadArgument);
            }
          }
        }
      }
  
      return this.finishNode(node, optional ? "OptionalCallExpression" : "CallExpression");
    }
  
    parseCallExpressionArguments(close, dynamicImport, allowPlaceholder, nodeForExtra, refExpressionErrors) {
      const elts = [];
      let first = true;
      const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
      this.state.inFSharpPipelineDirectBody = false;
  
      while (!this.eat(close)) {
        if (first) {
          first = false;
        } else {
          this.expect(types$1.comma);
  
          if (this.match(close)) {
            if (dynamicImport && !this.hasPlugin("importAssertions") && !this.hasPlugin("moduleAttributes")) {
              this.raise(this.state.lastTokStart, ErrorMessages.ImportCallArgumentTrailingComma);
            }
  
            if (nodeForExtra) {
              this.addExtra(nodeForExtra, "trailingComma", this.state.lastTokStart);
            }
  
            this.next();
            break;
          }
        }
  
        elts.push(this.parseExprListItem(false, refExpressionErrors, allowPlaceholder));
      }
  
      this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
      return elts;
    }
  
    shouldParseAsyncArrow() {
      return this.match(types$1.arrow) && !this.canInsertSemicolon();
    }
  
    parseAsyncArrowFromCallExpression(node, call) {
      var _call$extra;
  
      this.resetPreviousNodeTrailingComments(call);
      this.expect(types$1.arrow);
      this.parseArrowExpression(node, call.arguments, true, (_call$extra = call.extra) == null ? void 0 : _call$extra.trailingComma);
      setInnerComments(node, call.innerComments);
      setInnerComments(node, call.callee.trailingComments);
      return node;
    }
  
    parseNoCallExpr() {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      return this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
    }
  
    parseExprAtom(refExpressionErrors) {
      let node;
  
      switch (this.state.type) {
        case types$1._super:
          return this.parseSuper();
  
        case types$1._import:
          node = this.startNode();
          this.next();
  
          if (this.match(types$1.dot)) {
            return this.parseImportMetaProperty(node);
          }
  
          if (!this.match(types$1.parenL)) {
            this.raise(this.state.lastTokStart, ErrorMessages.UnsupportedImport);
          }
  
          return this.finishNode(node, "Import");
  
        case types$1._this:
          node = this.startNode();
          this.next();
          return this.finishNode(node, "ThisExpression");
  
        case types$1.name:
          {
            if (this.isContextual("module") && this.lookaheadCharCode() === 123 && !this.hasFollowingLineBreak()) {
              return this.parseModuleExpression();
            }
  
            const canBeArrow = this.state.potentialArrowAt === this.state.start;
            const containsEsc = this.state.containsEsc;
            const id = this.parseIdentifier();
  
            if (!containsEsc && id.name === "async" && !this.canInsertSemicolon()) {
              if (this.match(types$1._function)) {
                this.resetPreviousNodeTrailingComments(id);
                this.next();
                return this.parseFunction(this.startNodeAtNode(id), undefined, true);
              } else if (this.match(types$1.name)) {
                if (this.lookaheadCharCode() === 61) {
                  return this.parseAsyncArrowUnaryFunction(this.startNodeAtNode(id));
                } else {
                  return id;
                }
              } else if (this.match(types$1._do)) {
                this.resetPreviousNodeTrailingComments(id);
                return this.parseDo(this.startNodeAtNode(id), true);
              }
            }
  
            if (canBeArrow && this.match(types$1.arrow) && !this.canInsertSemicolon()) {
              this.next();
              return this.parseArrowExpression(this.startNodeAtNode(id), [id], false);
            }
  
            return id;
          }
  
        case types$1._do:
          {
            return this.parseDo(this.startNode(), false);
          }
  
        case types$1.slash:
        case types$1.slashAssign:
          {
            this.readRegexp();
            return this.parseRegExpLiteral(this.state.value);
          }
  
        case types$1.num:
          return this.parseNumericLiteral(this.state.value);
  
        case types$1.bigint:
          return this.parseBigIntLiteral(this.state.value);
  
        case types$1.decimal:
          return this.parseDecimalLiteral(this.state.value);
  
        case types$1.string:
          return this.parseStringLiteral(this.state.value);
  
        case types$1._null:
          return this.parseNullLiteral();
  
        case types$1._true:
          return this.parseBooleanLiteral(true);
  
        case types$1._false:
          return this.parseBooleanLiteral(false);
  
        case types$1.parenL:
          {
            const canBeArrow = this.state.potentialArrowAt === this.state.start;
            return this.parseParenAndDistinguishExpression(canBeArrow);
          }
  
        case types$1.bracketBarL:
        case types$1.bracketHashL:
          {
            return this.parseArrayLike(this.state.type === types$1.bracketBarL ? types$1.bracketBarR : types$1.bracketR, false, true, refExpressionErrors);
          }
  
        case types$1.bracketL:
          {
            return this.parseArrayLike(types$1.bracketR, true, false, refExpressionErrors);
          }
  
        case types$1.braceBarL:
        case types$1.braceHashL:
          {
            return this.parseObjectLike(this.state.type === types$1.braceBarL ? types$1.braceBarR : types$1.braceR, false, true, refExpressionErrors);
          }
  
        case types$1.braceL:
          {
            return this.parseObjectLike(types$1.braceR, false, false, refExpressionErrors);
          }
  
        case types$1._function:
          return this.parseFunctionOrFunctionSent();
  
        case types$1.at:
          this.parseDecorators();
  
        case types$1._class:
          node = this.startNode();
          this.takeDecorators(node);
          return this.parseClass(node, false);
  
        case types$1._new:
          return this.parseNewOrNewTarget();
  
        case types$1.backQuote:
          return this.parseTemplate(false);
  
        case types$1.doubleColon:
          {
            node = this.startNode();
            this.next();
            node.object = null;
            const callee = node.callee = this.parseNoCallExpr();
  
            if (callee.type === "MemberExpression") {
              return this.finishNode(node, "BindExpression");
            } else {
              throw this.raise(callee.start, ErrorMessages.UnsupportedBind);
            }
          }
  
        case types$1.privateName:
          {
            const start = this.state.start;
            const value = this.state.value;
            node = this.parsePrivateName();
  
            if (this.match(types$1._in)) {
              this.expectPlugin("privateIn");
              this.classScope.usePrivateName(value, node.start);
            } else if (this.hasPlugin("privateIn")) {
              this.raise(this.state.start, ErrorMessages.PrivateInExpectedIn, value);
            } else {
              throw this.unexpected(start);
            }
  
            return node;
          }
  
        case types$1.hash:
          {
            if (this.state.inPipeline) {
              node = this.startNode();
  
              if (this.getPluginOption("pipelineOperator", "proposal") !== "smart") {
                this.raise(node.start, ErrorMessages.PrimaryTopicRequiresSmartPipeline);
              }
  
              this.next();
  
              if (!this.primaryTopicReferenceIsAllowedInCurrentTopicContext()) {
                this.raise(node.start, ErrorMessages.PrimaryTopicNotAllowed);
              }
  
              this.registerTopicReference();
              return this.finishNode(node, "PipelinePrimaryTopicReference");
            }
          }
  
        case types$1.relational:
          {
            if (this.state.value === "<") {
              const lookaheadCh = this.input.codePointAt(this.nextTokenStart());
  
              if (isIdentifierStart(lookaheadCh) || lookaheadCh === 62) {
                  this.expectOnePlugin(["jsx", "flow", "typescript"]);
                }
            }
          }
  
        default:
          throw this.unexpected();
      }
    }
  
    parseAsyncArrowUnaryFunction(node) {
      this.prodParam.enter(functionFlags(true, this.prodParam.hasYield));
      const params = [this.parseIdentifier()];
      this.prodParam.exit();
  
      if (this.hasPrecedingLineBreak()) {
        this.raise(this.state.pos, ErrorMessages.LineTerminatorBeforeArrow);
      }
  
      this.expect(types$1.arrow);
      this.parseArrowExpression(node, params, true);
      return node;
    }
  
    parseDo(node, isAsync) {
      this.expectPlugin("doExpressions");
  
      if (isAsync) {
        this.expectPlugin("asyncDoExpressions");
      }
  
      node.async = isAsync;
      this.next();
      const oldLabels = this.state.labels;
      this.state.labels = [];
  
      if (isAsync) {
        this.prodParam.enter(PARAM_AWAIT);
        node.body = this.parseBlock();
        this.prodParam.exit();
      } else {
        node.body = this.parseBlock();
      }
  
      this.state.labels = oldLabels;
      return this.finishNode(node, "DoExpression");
    }
  
    parseSuper() {
      const node = this.startNode();
      this.next();
  
      if (this.match(types$1.parenL) && !this.scope.allowDirectSuper && !this.options.allowSuperOutsideMethod) {
        this.raise(node.start, ErrorMessages.SuperNotAllowed);
      } else if (!this.scope.allowSuper && !this.options.allowSuperOutsideMethod) {
        this.raise(node.start, ErrorMessages.UnexpectedSuper);
      }
  
      if (!this.match(types$1.parenL) && !this.match(types$1.bracketL) && !this.match(types$1.dot)) {
        this.raise(node.start, ErrorMessages.UnsupportedSuper);
      }
  
      return this.finishNode(node, "Super");
    }
  
    parseMaybePrivateName(isPrivateNameAllowed) {
      const isPrivate = this.match(types$1.privateName);
  
      if (isPrivate) {
        if (!isPrivateNameAllowed) {
          this.raise(this.state.start + 1, ErrorMessages.UnexpectedPrivateField);
        }
  
        return this.parsePrivateName();
      } else {
        return this.parseIdentifier(true);
      }
    }
  
    parsePrivateName() {
      const node = this.startNode();
      const id = this.startNodeAt(this.state.start + 1, new Position(this.state.curLine, this.state.start + 1 - this.state.lineStart));
      const name = this.state.value;
      this.next();
      node.id = this.createIdentifier(id, name);
      return this.finishNode(node, "PrivateName");
    }
  
    parseFunctionOrFunctionSent() {
      const node = this.startNode();
      this.next();
  
      if (this.prodParam.hasYield && this.match(types$1.dot)) {
        const meta = this.createIdentifier(this.startNodeAtNode(node), "function");
        this.next();
        return this.parseMetaProperty(node, meta, "sent");
      }
  
      return this.parseFunction(node);
    }
  
    parseMetaProperty(node, meta, propertyName) {
      node.meta = meta;
  
      if (meta.name === "function" && propertyName === "sent") {
        if (this.isContextual(propertyName)) {
          this.expectPlugin("functionSent");
        } else if (!this.hasPlugin("functionSent")) {
          this.unexpected();
        }
      }
  
      const containsEsc = this.state.containsEsc;
      node.property = this.parseIdentifier(true);
  
      if (node.property.name !== propertyName || containsEsc) {
        this.raise(node.property.start, ErrorMessages.UnsupportedMetaProperty, meta.name, propertyName);
      }
  
      return this.finishNode(node, "MetaProperty");
    }
  
    parseImportMetaProperty(node) {
      const id = this.createIdentifier(this.startNodeAtNode(node), "import");
      this.next();
  
      if (this.isContextual("meta")) {
        if (!this.inModule) {
          this.raise(id.start, SourceTypeModuleErrorMessages.ImportMetaOutsideModule);
        }
  
        this.sawUnambiguousESM = true;
      }
  
      return this.parseMetaProperty(node, id, "meta");
    }
  
    parseLiteralAtNode(value, type, node) {
      this.addExtra(node, "rawValue", value);
      this.addExtra(node, "raw", this.input.slice(node.start, this.state.end));
      node.value = value;
      this.next();
      return this.finishNode(node, type);
    }
  
    parseLiteral(value, type) {
      const node = this.startNode();
      return this.parseLiteralAtNode(value, type, node);
    }
  
    parseStringLiteral(value) {
      return this.parseLiteral(value, "StringLiteral");
    }
  
    parseNumericLiteral(value) {
      return this.parseLiteral(value, "NumericLiteral");
    }
  
    parseBigIntLiteral(value) {
      return this.parseLiteral(value, "BigIntLiteral");
    }
  
    parseDecimalLiteral(value) {
      return this.parseLiteral(value, "DecimalLiteral");
    }
  
    parseRegExpLiteral(value) {
      const node = this.parseLiteral(value.value, "RegExpLiteral");
      node.pattern = value.pattern;
      node.flags = value.flags;
      return node;
    }
  
    parseBooleanLiteral(value) {
      const node = this.startNode();
      node.value = value;
      this.next();
      return this.finishNode(node, "BooleanLiteral");
    }
  
    parseNullLiteral() {
      const node = this.startNode();
      this.next();
      return this.finishNode(node, "NullLiteral");
    }
  
    parseParenAndDistinguishExpression(canBeArrow) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      let val;
      this.next();
      this.expressionScope.enter(newArrowHeadScope());
      const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
      const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
      this.state.maybeInArrowParameters = true;
      this.state.inFSharpPipelineDirectBody = false;
      const innerStartPos = this.state.start;
      const innerStartLoc = this.state.startLoc;
      const exprList = [];
      const refExpressionErrors = new ExpressionErrors();
      let first = true;
      let spreadStart;
      let optionalCommaStart;
  
      while (!this.match(types$1.parenR)) {
        if (first) {
          first = false;
        } else {
          this.expect(types$1.comma, refExpressionErrors.optionalParameters === -1 ? null : refExpressionErrors.optionalParameters);
  
          if (this.match(types$1.parenR)) {
            optionalCommaStart = this.state.start;
            break;
          }
        }
  
        if (this.match(types$1.ellipsis)) {
          const spreadNodeStartPos = this.state.start;
          const spreadNodeStartLoc = this.state.startLoc;
          spreadStart = this.state.start;
          exprList.push(this.parseParenItem(this.parseRestBinding(), spreadNodeStartPos, spreadNodeStartLoc));
          this.checkCommaAfterRest(41);
          break;
        } else {
          exprList.push(this.parseMaybeAssignAllowIn(refExpressionErrors, this.parseParenItem));
        }
      }
  
      const innerEndPos = this.state.lastTokEnd;
      const innerEndLoc = this.state.lastTokEndLoc;
      this.expect(types$1.parenR);
      this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
      this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
      let arrowNode = this.startNodeAt(startPos, startLoc);
  
      if (canBeArrow && this.shouldParseArrow() && (arrowNode = this.parseArrow(arrowNode))) {
        this.expressionScope.validateAsPattern();
        this.expressionScope.exit();
        this.parseArrowExpression(arrowNode, exprList, false);
        return arrowNode;
      }
  
      this.expressionScope.exit();
  
      if (!exprList.length) {
        this.unexpected(this.state.lastTokStart);
      }
  
      if (optionalCommaStart) this.unexpected(optionalCommaStart);
      if (spreadStart) this.unexpected(spreadStart);
      this.checkExpressionErrors(refExpressionErrors, true);
      this.toReferencedListDeep(exprList, true);
  
      if (exprList.length > 1) {
        val = this.startNodeAt(innerStartPos, innerStartLoc);
        val.expressions = exprList;
        this.finishNode(val, "SequenceExpression");
        val.end = innerEndPos;
        val.loc.end = innerEndLoc;
      } else {
        val = exprList[0];
      }
  
      if (!this.options.createParenthesizedExpressions) {
        this.addExtra(val, "parenthesized", true);
        this.addExtra(val, "parenStart", startPos);
        return val;
      }
  
      const parenExpression = this.startNodeAt(startPos, startLoc);
      parenExpression.expression = val;
      this.finishNode(parenExpression, "ParenthesizedExpression");
      return parenExpression;
    }
  
    shouldParseArrow() {
      return !this.canInsertSemicolon();
    }
  
    parseArrow(node) {
      if (this.eat(types$1.arrow)) {
        return node;
      }
    }
  
    parseParenItem(node, startPos, startLoc) {
      return node;
    }
  
    parseNewOrNewTarget() {
      const node = this.startNode();
      this.next();
  
      if (this.match(types$1.dot)) {
        const meta = this.createIdentifier(this.startNodeAtNode(node), "new");
        this.next();
        const metaProp = this.parseMetaProperty(node, meta, "target");
  
        if (!this.scope.inNonArrowFunction && !this.scope.inClass) {
          this.raise(metaProp.start, ErrorMessages.UnexpectedNewTarget);
        }
  
        return metaProp;
      }
  
      return this.parseNew(node);
    }
  
    parseNew(node) {
      node.callee = this.parseNoCallExpr();
  
      if (node.callee.type === "Import") {
        this.raise(node.callee.start, ErrorMessages.ImportCallNotNewExpression);
      } else if (this.isOptionalChain(node.callee)) {
        this.raise(this.state.lastTokEnd, ErrorMessages.OptionalChainingNoNew);
      } else if (this.eat(types$1.questionDot)) {
        this.raise(this.state.start, ErrorMessages.OptionalChainingNoNew);
      }
  
      this.parseNewArguments(node);
      return this.finishNode(node, "NewExpression");
    }
  
    parseNewArguments(node) {
      if (this.eat(types$1.parenL)) {
        const args = this.parseExprList(types$1.parenR);
        this.toReferencedList(args);
        node.arguments = args;
      } else {
        node.arguments = [];
      }
    }
  
    parseTemplateElement(isTagged) {
      const elem = this.startNode();
  
      if (this.state.value === null) {
        if (!isTagged) {
          this.raise(this.state.start + 1, ErrorMessages.InvalidEscapeSequenceTemplate);
        }
      }
  
      elem.value = {
        raw: this.input.slice(this.state.start, this.state.end).replace(/\r\n?/g, "\n"),
        cooked: this.state.value
      };
      this.next();
      elem.tail = this.match(types$1.backQuote);
      return this.finishNode(elem, "TemplateElement");
    }
  
    parseTemplate(isTagged) {
      const node = this.startNode();
      this.next();
      node.expressions = [];
      let curElt = this.parseTemplateElement(isTagged);
      node.quasis = [curElt];
  
      while (!curElt.tail) {
        this.expect(types$1.dollarBraceL);
        node.expressions.push(this.parseTemplateSubstitution());
        this.expect(types$1.braceR);
        node.quasis.push(curElt = this.parseTemplateElement(isTagged));
      }
  
      this.next();
      return this.finishNode(node, "TemplateLiteral");
    }
  
    parseTemplateSubstitution() {
      return this.parseExpression();
    }
  
    parseObjectLike(close, isPattern, isRecord, refExpressionErrors) {
      if (isRecord) {
        this.expectPlugin("recordAndTuple");
      }
  
      const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
      this.state.inFSharpPipelineDirectBody = false;
      const propHash = Object.create(null);
      let first = true;
      const node = this.startNode();
      node.properties = [];
      this.next();
  
      while (!this.match(close)) {
        if (first) {
          first = false;
        } else {
          this.expect(types$1.comma);
  
          if (this.match(close)) {
            this.addExtra(node, "trailingComma", this.state.lastTokStart);
            break;
          }
        }
  
        const prop = this.parsePropertyDefinition(isPattern, refExpressionErrors);
  
        if (!isPattern) {
          this.checkProto(prop, isRecord, propHash, refExpressionErrors);
        }
  
        if (isRecord && !this.isObjectProperty(prop) && prop.type !== "SpreadElement") {
          this.raise(prop.start, ErrorMessages.InvalidRecordProperty);
        }
  
        if (prop.shorthand) {
          this.addExtra(prop, "shorthand", true);
        }
  
        node.properties.push(prop);
      }
  
      this.next();
      this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
      let type = "ObjectExpression";
  
      if (isPattern) {
        type = "ObjectPattern";
      } else if (isRecord) {
        type = "RecordExpression";
      }
  
      return this.finishNode(node, type);
    }
  
    maybeAsyncOrAccessorProp(prop) {
      return !prop.computed && prop.key.type === "Identifier" && (this.isLiteralPropertyName() || this.match(types$1.bracketL) || this.match(types$1.star));
    }
  
    parsePropertyDefinition(isPattern, refExpressionErrors) {
      let decorators = [];
  
      if (this.match(types$1.at)) {
        if (this.hasPlugin("decorators")) {
          this.raise(this.state.start, ErrorMessages.UnsupportedPropertyDecorator);
        }
  
        while (this.match(types$1.at)) {
          decorators.push(this.parseDecorator());
        }
      }
  
      const prop = this.startNode();
      let isGenerator = false;
      let isAsync = false;
      let isAccessor = false;
      let startPos;
      let startLoc;
  
      if (this.match(types$1.ellipsis)) {
        if (decorators.length) this.unexpected();
  
        if (isPattern) {
          this.next();
          prop.argument = this.parseIdentifier();
          this.checkCommaAfterRest(125);
          return this.finishNode(prop, "RestElement");
        }
  
        return this.parseSpread();
      }
  
      if (decorators.length) {
        prop.decorators = decorators;
        decorators = [];
      }
  
      prop.method = false;
  
      if (isPattern || refExpressionErrors) {
        startPos = this.state.start;
        startLoc = this.state.startLoc;
      }
  
      if (!isPattern) {
        isGenerator = this.eat(types$1.star);
      }
  
      const containsEsc = this.state.containsEsc;
      const key = this.parsePropertyName(prop, false);
  
      if (!isPattern && !isGenerator && !containsEsc && this.maybeAsyncOrAccessorProp(prop)) {
        const keyName = key.name;
  
        if (keyName === "async" && !this.hasPrecedingLineBreak()) {
          isAsync = true;
          this.resetPreviousNodeTrailingComments(key);
          isGenerator = this.eat(types$1.star);
          this.parsePropertyName(prop, false);
        }
  
        if (keyName === "get" || keyName === "set") {
          isAccessor = true;
          this.resetPreviousNodeTrailingComments(key);
          prop.kind = keyName;
  
          if (this.match(types$1.star)) {
            isGenerator = true;
            this.raise(this.state.pos, ErrorMessages.AccessorIsGenerator, keyName);
            this.next();
          }
  
          this.parsePropertyName(prop, false);
        }
      }
  
      this.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors);
      return prop;
    }
  
    getGetterSetterExpectedParamCount(method) {
      return method.kind === "get" ? 0 : 1;
    }
  
    getObjectOrClassMethodParams(method) {
      return method.params;
    }
  
    checkGetterSetterParams(method) {
      var _params;
  
      const paramCount = this.getGetterSetterExpectedParamCount(method);
      const params = this.getObjectOrClassMethodParams(method);
      const start = method.start;
  
      if (params.length !== paramCount) {
        if (method.kind === "get") {
          this.raise(start, ErrorMessages.BadGetterArity);
        } else {
          this.raise(start, ErrorMessages.BadSetterArity);
        }
      }
  
      if (method.kind === "set" && ((_params = params[params.length - 1]) == null ? void 0 : _params.type) === "RestElement") {
        this.raise(start, ErrorMessages.BadSetterRestParameter);
      }
    }
  
    parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) {
      if (isAccessor) {
        this.parseMethod(prop, isGenerator, false, false, false, "ObjectMethod");
        this.checkGetterSetterParams(prop);
        return prop;
      }
  
      if (isAsync || isGenerator || this.match(types$1.parenL)) {
        if (isPattern) this.unexpected();
        prop.kind = "method";
        prop.method = true;
        return this.parseMethod(prop, isGenerator, isAsync, false, false, "ObjectMethod");
      }
    }
  
    parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors) {
      prop.shorthand = false;
  
      if (this.eat(types$1.colon)) {
        prop.value = isPattern ? this.parseMaybeDefault(this.state.start, this.state.startLoc) : this.parseMaybeAssignAllowIn(refExpressionErrors);
        return this.finishNode(prop, "ObjectProperty");
      }
  
      if (!prop.computed && prop.key.type === "Identifier") {
        this.checkReservedWord(prop.key.name, prop.key.start, true, false);
  
        if (isPattern) {
          prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key.__clone());
        } else if (this.match(types$1.eq) && refExpressionErrors) {
          if (refExpressionErrors.shorthandAssign === -1) {
            refExpressionErrors.shorthandAssign = this.state.start;
          }
  
          prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key.__clone());
        } else {
          prop.value = prop.key.__clone();
        }
  
        prop.shorthand = true;
        return this.finishNode(prop, "ObjectProperty");
      }
    }
  
    parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors) {
      const node = this.parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) || this.parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors);
      if (!node) this.unexpected();
      return node;
    }
  
    parsePropertyName(prop, isPrivateNameAllowed) {
      if (this.eat(types$1.bracketL)) {
        prop.computed = true;
        prop.key = this.parseMaybeAssignAllowIn();
        this.expect(types$1.bracketR);
      } else {
        const oldInPropertyName = this.state.inPropertyName;
        this.state.inPropertyName = true;
        const type = this.state.type;
        prop.key = type === types$1.num || type === types$1.string || type === types$1.bigint || type === types$1.decimal ? this.parseExprAtom() : this.parseMaybePrivateName(isPrivateNameAllowed);
  
        if (type !== types$1.privateName) {
          prop.computed = false;
        }
  
        this.state.inPropertyName = oldInPropertyName;
      }
  
      return prop.key;
    }
  
    initFunction(node, isAsync) {
      node.id = null;
      node.generator = false;
      node.async = !!isAsync;
    }
  
    parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) {
      this.initFunction(node, isAsync);
      node.generator = !!isGenerator;
      const allowModifiers = isConstructor;
      this.scope.enter(SCOPE_FUNCTION | SCOPE_SUPER | (inClassScope ? SCOPE_CLASS : 0) | (allowDirectSuper ? SCOPE_DIRECT_SUPER : 0));
      this.prodParam.enter(functionFlags(isAsync, node.generator));
      this.parseFunctionParams(node, allowModifiers);
      this.parseFunctionBodyAndFinish(node, type, true);
      this.prodParam.exit();
      this.scope.exit();
      return node;
    }
  
    parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) {
      if (isTuple) {
        this.expectPlugin("recordAndTuple");
      }
  
      const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
      this.state.inFSharpPipelineDirectBody = false;
      const node = this.startNode();
      this.next();
      node.elements = this.parseExprList(close, !isTuple, refExpressionErrors, node);
      this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
      return this.finishNode(node, isTuple ? "TupleExpression" : "ArrayExpression");
    }
  
    parseArrowExpression(node, params, isAsync, trailingCommaPos) {
      this.scope.enter(SCOPE_FUNCTION | SCOPE_ARROW);
      let flags = functionFlags(isAsync, false);
  
      if (!this.match(types$1.bracketL) && this.prodParam.hasIn) {
        flags |= PARAM_IN;
      }
  
      this.prodParam.enter(flags);
      this.initFunction(node, isAsync);
      const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
  
      if (params) {
        this.state.maybeInArrowParameters = true;
        this.setArrowFunctionParameters(node, params, trailingCommaPos);
      }
  
      this.state.maybeInArrowParameters = false;
      this.parseFunctionBody(node, true);
      this.prodParam.exit();
      this.scope.exit();
      this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
      return this.finishNode(node, "ArrowFunctionExpression");
    }
  
    setArrowFunctionParameters(node, params, trailingCommaPos) {
      node.params = this.toAssignableList(params, trailingCommaPos, false);
    }
  
    parseFunctionBodyAndFinish(node, type, isMethod = false) {
      this.parseFunctionBody(node, false, isMethod);
      this.finishNode(node, type);
    }
  
    parseFunctionBody(node, allowExpression, isMethod = false) {
      const isExpression = allowExpression && !this.match(types$1.braceL);
      this.expressionScope.enter(newExpressionScope());
  
      if (isExpression) {
        node.body = this.parseMaybeAssign();
        this.checkParams(node, false, allowExpression, false);
      } else {
        const oldStrict = this.state.strict;
        const oldLabels = this.state.labels;
        this.state.labels = [];
        this.prodParam.enter(this.prodParam.currentFlags() | PARAM_RETURN);
        node.body = this.parseBlock(true, false, hasStrictModeDirective => {
          const nonSimple = !this.isSimpleParamList(node.params);
  
          if (hasStrictModeDirective && nonSimple) {
            const errorPos = (node.kind === "method" || node.kind === "constructor") && !!node.key ? node.key.end : node.start;
            this.raise(errorPos, ErrorMessages.IllegalLanguageModeDirective);
          }
  
          const strictModeChanged = !oldStrict && this.state.strict;
          this.checkParams(node, !this.state.strict && !allowExpression && !isMethod && !nonSimple, allowExpression, strictModeChanged);
  
          if (this.state.strict && node.id) {
            this.checkLVal(node.id, "function name", BIND_OUTSIDE, undefined, undefined, strictModeChanged);
          }
        });
        this.prodParam.exit();
        this.expressionScope.exit();
        this.state.labels = oldLabels;
      }
    }
  
    isSimpleParamList(params) {
      for (let i = 0, len = params.length; i < len; i++) {
        if (params[i].type !== "Identifier") return false;
      }
  
      return true;
    }
  
    checkParams(node, allowDuplicates, isArrowFunction, strictModeChanged = true) {
      const checkClashes = new Set();
  
      for (const param of node.params) {
        this.checkLVal(param, "function parameter list", BIND_VAR, allowDuplicates ? null : checkClashes, undefined, strictModeChanged);
      }
    }
  
    parseExprList(close, allowEmpty, refExpressionErrors, nodeForExtra) {
      const elts = [];
      let first = true;
  
      while (!this.eat(close)) {
        if (first) {
          first = false;
        } else {
          this.expect(types$1.comma);
  
          if (this.match(close)) {
            if (nodeForExtra) {
              this.addExtra(nodeForExtra, "trailingComma", this.state.lastTokStart);
            }
  
            this.next();
            break;
          }
        }
  
        elts.push(this.parseExprListItem(allowEmpty, refExpressionErrors));
      }
  
      return elts;
    }
  
    parseExprListItem(allowEmpty, refExpressionErrors, allowPlaceholder) {
      let elt;
  
      if (this.match(types$1.comma)) {
        if (!allowEmpty) {
          this.raise(this.state.pos, ErrorMessages.UnexpectedToken, ",");
        }
  
        elt = null;
      } else if (this.match(types$1.ellipsis)) {
        const spreadNodeStartPos = this.state.start;
        const spreadNodeStartLoc = this.state.startLoc;
        elt = this.parseParenItem(this.parseSpread(refExpressionErrors), spreadNodeStartPos, spreadNodeStartLoc);
      } else if (this.match(types$1.question)) {
        this.expectPlugin("partialApplication");
  
        if (!allowPlaceholder) {
          this.raise(this.state.start, ErrorMessages.UnexpectedArgumentPlaceholder);
        }
  
        const node = this.startNode();
        this.next();
        elt = this.finishNode(node, "ArgumentPlaceholder");
      } else {
        elt = this.parseMaybeAssignAllowIn(refExpressionErrors, this.parseParenItem);
      }
  
      return elt;
    }
  
    parseIdentifier(liberal) {
      const node = this.startNode();
      const name = this.parseIdentifierName(node.start, liberal);
      return this.createIdentifier(node, name);
    }
  
    createIdentifier(node, name) {
      node.name = name;
      node.loc.identifierName = name;
      return this.finishNode(node, "Identifier");
    }
  
    parseIdentifierName(pos, liberal) {
      let name;
      const {
        start,
        type
      } = this.state;
  
      if (type === types$1.name) {
        name = this.state.value;
      } else if (type.keyword) {
        name = type.keyword;
      } else {
        throw this.unexpected();
      }
  
      if (liberal) {
        this.state.type = types$1.name;
      } else {
        this.checkReservedWord(name, start, !!type.keyword, false);
      }
  
      this.next();
      return name;
    }
  
    checkReservedWord(word, startLoc, checkKeywords, isBinding) {
      if (word.length > 10) {
        return;
      }
  
      if (!canBeReservedWord(word)) {
        return;
      }
  
      if (word === "yield") {
        if (this.prodParam.hasYield) {
          this.raise(startLoc, ErrorMessages.YieldBindingIdentifier);
          return;
        }
      } else if (word === "await") {
        if (this.prodParam.hasAwait) {
          this.raise(startLoc, ErrorMessages.AwaitBindingIdentifier);
          return;
        } else if (this.scope.inStaticBlock) {
          this.raise(startLoc, ErrorMessages.AwaitBindingIdentifierInStaticBlock);
          return;
        } else {
          this.expressionScope.recordAsyncArrowParametersError(startLoc, ErrorMessages.AwaitBindingIdentifier);
        }
      } else if (word === "arguments") {
        if (this.scope.inClassAndNotInNonArrowFunction) {
          this.raise(startLoc, ErrorMessages.ArgumentsInClass);
          return;
        }
      }
  
      if (checkKeywords && isKeyword(word)) {
        this.raise(startLoc, ErrorMessages.UnexpectedKeyword, word);
        return;
      }
  
      const reservedTest = !this.state.strict ? isReservedWord : isBinding ? isStrictBindReservedWord : isStrictReservedWord;
  
      if (reservedTest(word, this.inModule)) {
        this.raise(startLoc, ErrorMessages.UnexpectedReservedWord, word);
      }
    }
  
    isAwaitAllowed() {
      if (this.prodParam.hasAwait) return true;
  
      if (this.options.allowAwaitOutsideFunction && !this.scope.inFunction) {
        return true;
      }
  
      return false;
    }
  
    parseAwait(startPos, startLoc) {
      const node = this.startNodeAt(startPos, startLoc);
      this.expressionScope.recordParameterInitializerError(node.start, ErrorMessages.AwaitExpressionFormalParameter);
  
      if (this.eat(types$1.star)) {
        this.raise(node.start, ErrorMessages.ObsoleteAwaitStar);
      }
  
      if (!this.scope.inFunction && !this.options.allowAwaitOutsideFunction) {
        if (this.isAmbiguousAwait()) {
          this.ambiguousScriptDifferentAst = true;
        } else {
          this.sawUnambiguousESM = true;
        }
      }
  
      if (!this.state.soloAwait) {
        node.argument = this.parseMaybeUnary(null, true);
      }
  
      return this.finishNode(node, "AwaitExpression");
    }
  
    isAmbiguousAwait() {
      return this.hasPrecedingLineBreak() || this.match(types$1.plusMin) || this.match(types$1.parenL) || this.match(types$1.bracketL) || this.match(types$1.backQuote) || this.match(types$1.regexp) || this.match(types$1.slash) || this.hasPlugin("v8intrinsic") && this.match(types$1.modulo);
    }
  
    parseYield() {
      const node = this.startNode();
      this.expressionScope.recordParameterInitializerError(node.start, ErrorMessages.YieldInParameter);
      this.next();
      let delegating = false;
      let argument = null;
  
      if (!this.hasPrecedingLineBreak()) {
        delegating = this.eat(types$1.star);
  
        switch (this.state.type) {
          case types$1.semi:
          case types$1.eof:
          case types$1.braceR:
          case types$1.parenR:
          case types$1.bracketR:
          case types$1.braceBarR:
          case types$1.colon:
          case types$1.comma:
            if (!delegating) break;
  
          default:
            argument = this.parseMaybeAssign();
        }
      }
  
      node.delegate = delegating;
      node.argument = argument;
      return this.finishNode(node, "YieldExpression");
    }
  
    checkPipelineAtInfixOperator(left, leftStartPos) {
      if (this.getPluginOption("pipelineOperator", "proposal") === "smart") {
        if (left.type === "SequenceExpression") {
          this.raise(leftStartPos, ErrorMessages.PipelineHeadSequenceExpression);
        }
      }
    }
  
    parseSmartPipelineBody(childExpression, startPos, startLoc) {
      this.checkSmartPipelineBodyEarlyErrors(childExpression, startPos);
      return this.parseSmartPipelineBodyInStyle(childExpression, startPos, startLoc);
    }
  
    checkSmartPipelineBodyEarlyErrors(childExpression, startPos) {
      if (this.match(types$1.arrow)) {
        throw this.raise(this.state.start, ErrorMessages.PipelineBodyNoArrow);
      } else if (childExpression.type === "SequenceExpression") {
        this.raise(startPos, ErrorMessages.PipelineBodySequenceExpression);
      }
    }
  
    parseSmartPipelineBodyInStyle(childExpression, startPos, startLoc) {
      const bodyNode = this.startNodeAt(startPos, startLoc);
      const isSimpleReference = this.isSimpleReference(childExpression);
  
      if (isSimpleReference) {
        bodyNode.callee = childExpression;
      } else {
        if (!this.topicReferenceWasUsedInCurrentTopicContext()) {
          this.raise(startPos, ErrorMessages.PipelineTopicUnused);
        }
  
        bodyNode.expression = childExpression;
      }
  
      return this.finishNode(bodyNode, isSimpleReference ? "PipelineBareFunction" : "PipelineTopicExpression");
    }
  
    isSimpleReference(expression) {
      switch (expression.type) {
        case "MemberExpression":
          return !expression.computed && this.isSimpleReference(expression.object);
  
        case "Identifier":
          return true;
  
        default:
          return false;
      }
    }
  
    withTopicPermittingContext(callback) {
      const outerContextTopicState = this.state.topicContext;
      this.state.topicContext = {
        maxNumOfResolvableTopics: 1,
        maxTopicIndex: null
      };
  
      try {
        return callback();
      } finally {
        this.state.topicContext = outerContextTopicState;
      }
    }
  
    withTopicForbiddingContext(callback) {
      const outerContextTopicState = this.state.topicContext;
      this.state.topicContext = {
        maxNumOfResolvableTopics: 0,
        maxTopicIndex: null
      };
  
      try {
        return callback();
      } finally {
        this.state.topicContext = outerContextTopicState;
      }
    }
  
    withSoloAwaitPermittingContext(callback) {
      const outerContextSoloAwaitState = this.state.soloAwait;
      this.state.soloAwait = true;
  
      try {
        return callback();
      } finally {
        this.state.soloAwait = outerContextSoloAwaitState;
      }
    }
  
    allowInAnd(callback) {
      const flags = this.prodParam.currentFlags();
      const prodParamToSet = PARAM_IN & ~flags;
  
      if (prodParamToSet) {
        this.prodParam.enter(flags | PARAM_IN);
  
        try {
          return callback();
        } finally {
          this.prodParam.exit();
        }
      }
  
      return callback();
    }
  
    disallowInAnd(callback) {
      const flags = this.prodParam.currentFlags();
      const prodParamToClear = PARAM_IN & flags;
  
      if (prodParamToClear) {
        this.prodParam.enter(flags & ~PARAM_IN);
  
        try {
          return callback();
        } finally {
          this.prodParam.exit();
        }
      }
  
      return callback();
    }
  
    registerTopicReference() {
      this.state.topicContext.maxTopicIndex = 0;
    }
  
    primaryTopicReferenceIsAllowedInCurrentTopicContext() {
      return this.state.topicContext.maxNumOfResolvableTopics >= 1;
    }
  
    topicReferenceWasUsedInCurrentTopicContext() {
      return this.state.topicContext.maxTopicIndex != null && this.state.topicContext.maxTopicIndex >= 0;
    }
  
    parseFSharpPipelineBody(prec) {
      const startPos = this.state.start;
      const startLoc = this.state.startLoc;
      this.state.potentialArrowAt = this.state.start;
      const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
      this.state.inFSharpPipelineDirectBody = true;
      const ret = this.parseExprOp(this.parseMaybeUnary(), startPos, startLoc, prec);
      this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
      return ret;
    }
  
    parseModuleExpression() {
      this.expectPlugin("moduleBlocks");
      const node = this.startNode();
      this.next();
      this.eat(types$1.braceL);
      const revertScopes = this.initializeScopes(true);
      this.enterInitialScopes();
      const program = this.startNode();
  
      try {
        node.body = this.parseProgram(program, types$1.braceR, "module");
      } finally {
        revertScopes();
      }
  
      this.eat(types$1.braceR);
      return this.finishNode(node, "ModuleExpression");
    }
  
  }
  
  const loopLabel = {
    kind: "loop"
  },
        switchLabel = {
    kind: "switch"
  };
  const FUNC_NO_FLAGS = 0b000,
        FUNC_STATEMENT = 0b001,
        FUNC_HANGING_STATEMENT = 0b010,
        FUNC_NULLABLE_ID = 0b100;
  const loneSurrogate = /[\uD800-\uDFFF]/u;
  const keywordRelationalOperator = /in(?:stanceof)?/y;
  
  function babel7CompatTokens(tokens) {
    {
      for (let i = 0; i < tokens.length; i++) {
        const token = tokens[i];
  
        if (token.type === types$1.privateName) {
          const {
            loc,
            start,
            value,
            end
          } = token;
          const hashEndPos = start + 1;
          const hashEndLoc = new Position(loc.start.line, loc.start.column + 1);
          tokens.splice(i, 1, new Token({
            type: types$1.hash,
            value: "#",
            start: start,
            end: hashEndPos,
            startLoc: loc.start,
            endLoc: hashEndLoc
          }), new Token({
            type: types$1.name,
            value: value,
            start: hashEndPos,
            end: end,
            startLoc: hashEndLoc,
            endLoc: loc.end
          }));
        }
      }
    }
    return tokens;
  }
  
  class StatementParser extends ExpressionParser {
    parseTopLevel(file, program) {
      file.program = this.parseProgram(program);
      file.comments = this.state.comments;
      if (this.options.tokens) file.tokens = babel7CompatTokens(this.tokens);
      return this.finishNode(file, "File");
    }
  
    parseProgram(program, end = types$1.eof, sourceType = this.options.sourceType) {
      program.sourceType = sourceType;
      program.interpreter = this.parseInterpreterDirective();
      this.parseBlockBody(program, true, true, end);
  
      if (this.inModule && !this.options.allowUndeclaredExports && this.scope.undefinedExports.size > 0) {
        for (const [name] of Array.from(this.scope.undefinedExports)) {
          const pos = this.scope.undefinedExports.get(name);
          this.raise(pos, ErrorMessages.ModuleExportUndefined, name);
        }
      }
  
      return this.finishNode(program, "Program");
    }
  
    stmtToDirective(stmt) {
      const directive = stmt;
      directive.type = "Directive";
      directive.value = directive.expression;
      delete directive.expression;
      const directiveLiteral = directive.value;
      const raw = this.input.slice(directiveLiteral.start, directiveLiteral.end);
      const val = directiveLiteral.value = raw.slice(1, -1);
      this.addExtra(directiveLiteral, "raw", raw);
      this.addExtra(directiveLiteral, "rawValue", val);
      directiveLiteral.type = "DirectiveLiteral";
      return directive;
    }
  
    parseInterpreterDirective() {
      if (!this.match(types$1.interpreterDirective)) {
        return null;
      }
  
      const node = this.startNode();
      node.value = this.state.value;
      this.next();
      return this.finishNode(node, "InterpreterDirective");
    }
  
    isLet(context) {
      if (!this.isContextual("let")) {
        return false;
      }
  
      return this.isLetKeyword(context);
    }
  
    isLetKeyword(context) {
      const next = this.nextTokenStart();
      const nextCh = this.codePointAtPos(next);
  
      if (nextCh === 92 || nextCh === 91) {
        return true;
      }
  
      if (context) return false;
      if (nextCh === 123) return true;
  
      if (isIdentifierStart(nextCh)) {
        keywordRelationalOperator.lastIndex = next;
        const matched = keywordRelationalOperator.exec(this.input);
  
        if (matched !== null) {
          const endCh = this.codePointAtPos(next + matched[0].length);
  
          if (!isIdentifierChar(endCh) && endCh !== 92) {
            return false;
          }
        }
  
        return true;
      }
  
      return false;
    }
  
    parseStatement(context, topLevel) {
      if (this.match(types$1.at)) {
        this.parseDecorators(true);
      }
  
      return this.parseStatementContent(context, topLevel);
    }
  
    parseStatementContent(context, topLevel) {
      let starttype = this.state.type;
      const node = this.startNode();
      let kind;
  
      if (this.isLet(context)) {
        starttype = types$1._var;
        kind = "let";
      }
  
      switch (starttype) {
        case types$1._break:
        case types$1._continue:
          return this.parseBreakContinueStatement(node, starttype.keyword);
  
        case types$1._debugger:
          return this.parseDebuggerStatement(node);
  
        case types$1._do:
          return this.parseDoStatement(node);
  
        case types$1._for:
          return this.parseForStatement(node);
  
        case types$1._function:
          if (this.lookaheadCharCode() === 46) break;
  
          if (context) {
            if (this.state.strict) {
              this.raise(this.state.start, ErrorMessages.StrictFunction);
            } else if (context !== "if" && context !== "label") {
              this.raise(this.state.start, ErrorMessages.SloppyFunction);
            }
          }
  
          return this.parseFunctionStatement(node, false, !context);
  
        case types$1._class:
          if (context) this.unexpected();
          return this.parseClass(node, true);
  
        case types$1._if:
          return this.parseIfStatement(node);
  
        case types$1._return:
          return this.parseReturnStatement(node);
  
        case types$1._switch:
          return this.parseSwitchStatement(node);
  
        case types$1._throw:
          return this.parseThrowStatement(node);
  
        case types$1._try:
          return this.parseTryStatement(node);
  
        case types$1._const:
        case types$1._var:
          kind = kind || this.state.value;
  
          if (context && kind !== "var") {
            this.raise(this.state.start, ErrorMessages.UnexpectedLexicalDeclaration);
          }
  
          return this.parseVarStatement(node, kind);
  
        case types$1._while:
          return this.parseWhileStatement(node);
  
        case types$1._with:
          return this.parseWithStatement(node);
  
        case types$1.braceL:
          return this.parseBlock();
  
        case types$1.semi:
          return this.parseEmptyStatement(node);
  
        case types$1._import:
          {
            const nextTokenCharCode = this.lookaheadCharCode();
  
            if (nextTokenCharCode === 40 || nextTokenCharCode === 46) {
                break;
              }
          }
  
        case types$1._export:
          {
            if (!this.options.allowImportExportEverywhere && !topLevel) {
              this.raise(this.state.start, ErrorMessages.UnexpectedImportExport);
            }
  
            this.next();
            let result;
  
            if (starttype === types$1._import) {
              result = this.parseImport(node);
  
              if (result.type === "ImportDeclaration" && (!result.importKind || result.importKind === "value")) {
                this.sawUnambiguousESM = true;
              }
            } else {
              result = this.parseExport(node);
  
              if (result.type === "ExportNamedDeclaration" && (!result.exportKind || result.exportKind === "value") || result.type === "ExportAllDeclaration" && (!result.exportKind || result.exportKind === "value") || result.type === "ExportDefaultDeclaration") {
                this.sawUnambiguousESM = true;
              }
            }
  
            this.assertModuleNodeAllowed(node);
            return result;
          }
  
        default:
          {
            if (this.isAsyncFunction()) {
              if (context) {
                this.raise(this.state.start, ErrorMessages.AsyncFunctionInSingleStatementContext);
              }
  
              this.next();
              return this.parseFunctionStatement(node, true, !context);
            }
          }
      }
  
      const maybeName = this.state.value;
      const expr = this.parseExpression();
  
      if (starttype === types$1.name && expr.type === "Identifier" && this.eat(types$1.colon)) {
        return this.parseLabeledStatement(node, maybeName, expr, context);
      } else {
        return this.parseExpressionStatement(node, expr);
      }
    }
  
    assertModuleNodeAllowed(node) {
      if (!this.options.allowImportExportEverywhere && !this.inModule) {
        this.raise(node.start, SourceTypeModuleErrorMessages.ImportOutsideModule);
      }
    }
  
    takeDecorators(node) {
      const decorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];
  
      if (decorators.length) {
        node.decorators = decorators;
        this.resetStartLocationFromNode(node, decorators[0]);
        this.state.decoratorStack[this.state.decoratorStack.length - 1] = [];
      }
    }
  
    canHaveLeadingDecorator() {
      return this.match(types$1._class);
    }
  
    parseDecorators(allowExport) {
      const currentContextDecorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];
  
      while (this.match(types$1.at)) {
        const decorator = this.parseDecorator();
        currentContextDecorators.push(decorator);
      }
  
      if (this.match(types$1._export)) {
        if (!allowExport) {
          this.unexpected();
        }
  
        if (this.hasPlugin("decorators") && !this.getPluginOption("decorators", "decoratorsBeforeExport")) {
          this.raise(this.state.start, ErrorMessages.DecoratorExportClass);
        }
      } else if (!this.canHaveLeadingDecorator()) {
        throw this.raise(this.state.start, ErrorMessages.UnexpectedLeadingDecorator);
      }
    }
  
    parseDecorator() {
      this.expectOnePlugin(["decorators-legacy", "decorators"]);
      const node = this.startNode();
      this.next();
  
      if (this.hasPlugin("decorators")) {
        this.state.decoratorStack.push([]);
        const startPos = this.state.start;
        const startLoc = this.state.startLoc;
        let expr;
  
        if (this.eat(types$1.parenL)) {
          expr = this.parseExpression();
          this.expect(types$1.parenR);
        } else {
          expr = this.parseIdentifier(false);
  
          while (this.eat(types$1.dot)) {
            const node = this.startNodeAt(startPos, startLoc);
            node.object = expr;
            node.property = this.parseIdentifier(true);
            node.computed = false;
            expr = this.finishNode(node, "MemberExpression");
          }
        }
  
        node.expression = this.parseMaybeDecoratorArguments(expr);
        this.state.decoratorStack.pop();
      } else {
        node.expression = this.parseExprSubscripts();
      }
  
      return this.finishNode(node, "Decorator");
    }
  
    parseMaybeDecoratorArguments(expr) {
      if (this.eat(types$1.parenL)) {
        const node = this.startNodeAtNode(expr);
        node.callee = expr;
        node.arguments = this.parseCallExpressionArguments(types$1.parenR, false);
        this.toReferencedList(node.arguments);
        return this.finishNode(node, "CallExpression");
      }
  
      return expr;
    }
  
    parseBreakContinueStatement(node, keyword) {
      const isBreak = keyword === "break";
      this.next();
  
      if (this.isLineTerminator()) {
        node.label = null;
      } else {
        node.label = this.parseIdentifier();
        this.semicolon();
      }
  
      this.verifyBreakContinue(node, keyword);
      return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement");
    }
  
    verifyBreakContinue(node, keyword) {
      const isBreak = keyword === "break";
      let i;
  
      for (i = 0; i < this.state.labels.length; ++i) {
        const lab = this.state.labels[i];
  
        if (node.label == null || lab.name === node.label.name) {
          if (lab.kind != null && (isBreak || lab.kind === "loop")) break;
          if (node.label && isBreak) break;
        }
      }
  
      if (i === this.state.labels.length) {
        this.raise(node.start, ErrorMessages.IllegalBreakContinue, keyword);
      }
    }
  
    parseDebuggerStatement(node) {
      this.next();
      this.semicolon();
      return this.finishNode(node, "DebuggerStatement");
    }
  
    parseHeaderExpression() {
      this.expect(types$1.parenL);
      const val = this.parseExpression();
      this.expect(types$1.parenR);
      return val;
    }
  
    parseDoStatement(node) {
      this.next();
      this.state.labels.push(loopLabel);
      node.body = this.withTopicForbiddingContext(() => this.parseStatement("do"));
      this.state.labels.pop();
      this.expect(types$1._while);
      node.test = this.parseHeaderExpression();
      this.eat(types$1.semi);
      return this.finishNode(node, "DoWhileStatement");
    }
  
    parseForStatement(node) {
      this.next();
      this.state.labels.push(loopLabel);
      let awaitAt = -1;
  
      if (this.isAwaitAllowed() && this.eatContextual("await")) {
        awaitAt = this.state.lastTokStart;
      }
  
      this.scope.enter(SCOPE_OTHER);
      this.expect(types$1.parenL);
  
      if (this.match(types$1.semi)) {
        if (awaitAt > -1) {
          this.unexpected(awaitAt);
        }
  
        return this.parseFor(node, null);
      }
  
      const startsWithLet = this.isContextual("let");
      const isLet = startsWithLet && this.isLetKeyword();
  
      if (this.match(types$1._var) || this.match(types$1._const) || isLet) {
        const init = this.startNode();
        const kind = isLet ? "let" : this.state.value;
        this.next();
        this.parseVar(init, true, kind);
        this.finishNode(init, "VariableDeclaration");
  
        if ((this.match(types$1._in) || this.isContextual("of")) && init.declarations.length === 1) {
          return this.parseForIn(node, init, awaitAt);
        }
  
        if (awaitAt > -1) {
          this.unexpected(awaitAt);
        }
  
        return this.parseFor(node, init);
      }
  
      const startsWithUnescapedName = this.match(types$1.name) && !this.state.containsEsc;
      const refExpressionErrors = new ExpressionErrors();
      const init = this.parseExpression(true, refExpressionErrors);
      const isForOf = this.isContextual("of");
  
      if (isForOf) {
        if (startsWithLet) {
          this.raise(init.start, ErrorMessages.ForOfLet);
        } else if (awaitAt === -1 && startsWithUnescapedName && init.type === "Identifier" && init.name === "async") {
          this.raise(init.start, ErrorMessages.ForOfAsync);
        }
      }
  
      if (isForOf || this.match(types$1._in)) {
        this.toAssignable(init, true);
        const description = isForOf ? "for-of statement" : "for-in statement";
        this.checkLVal(init, description);
        return this.parseForIn(node, init, awaitAt);
      } else {
        this.checkExpressionErrors(refExpressionErrors, true);
      }
  
      if (awaitAt > -1) {
        this.unexpected(awaitAt);
      }
  
      return this.parseFor(node, init);
    }
  
    parseFunctionStatement(node, isAsync, declarationPosition) {
      this.next();
      return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), isAsync);
    }
  
    parseIfStatement(node) {
      this.next();
      node.test = this.parseHeaderExpression();
      node.consequent = this.parseStatement("if");
      node.alternate = this.eat(types$1._else) ? this.parseStatement("if") : null;
      return this.finishNode(node, "IfStatement");
    }
  
    parseReturnStatement(node) {
      if (!this.prodParam.hasReturn && !this.options.allowReturnOutsideFunction) {
        this.raise(this.state.start, ErrorMessages.IllegalReturn);
      }
  
      this.next();
  
      if (this.isLineTerminator()) {
        node.argument = null;
      } else {
        node.argument = this.parseExpression();
        this.semicolon();
      }
  
      return this.finishNode(node, "ReturnStatement");
    }
  
    parseSwitchStatement(node) {
      this.next();
      node.discriminant = this.parseHeaderExpression();
      const cases = node.cases = [];
      this.expect(types$1.braceL);
      this.state.labels.push(switchLabel);
      this.scope.enter(SCOPE_OTHER);
      let cur;
  
      for (let sawDefault; !this.match(types$1.braceR);) {
        if (this.match(types$1._case) || this.match(types$1._default)) {
          const isCase = this.match(types$1._case);
          if (cur) this.finishNode(cur, "SwitchCase");
          cases.push(cur = this.startNode());
          cur.consequent = [];
          this.next();
  
          if (isCase) {
            cur.test = this.parseExpression();
          } else {
            if (sawDefault) {
              this.raise(this.state.lastTokStart, ErrorMessages.MultipleDefaultsInSwitch);
            }
  
            sawDefault = true;
            cur.test = null;
          }
  
          this.expect(types$1.colon);
        } else {
          if (cur) {
            cur.consequent.push(this.parseStatement(null));
          } else {
            this.unexpected();
          }
        }
      }
  
      this.scope.exit();
      if (cur) this.finishNode(cur, "SwitchCase");
      this.next();
      this.state.labels.pop();
      return this.finishNode(node, "SwitchStatement");
    }
  
    parseThrowStatement(node) {
      this.next();
  
      if (this.hasPrecedingLineBreak()) {
        this.raise(this.state.lastTokEnd, ErrorMessages.NewlineAfterThrow);
      }
  
      node.argument = this.parseExpression();
      this.semicolon();
      return this.finishNode(node, "ThrowStatement");
    }
  
    parseCatchClauseParam() {
      const param = this.parseBindingAtom();
      const simple = param.type === "Identifier";
      this.scope.enter(simple ? SCOPE_SIMPLE_CATCH : 0);
      this.checkLVal(param, "catch clause", BIND_LEXICAL);
      return param;
    }
  
    parseTryStatement(node) {
      this.next();
      node.block = this.parseBlock();
      node.handler = null;
  
      if (this.match(types$1._catch)) {
        const clause = this.startNode();
        this.next();
  
        if (this.match(types$1.parenL)) {
          this.expect(types$1.parenL);
          clause.param = this.parseCatchClauseParam();
          this.expect(types$1.parenR);
        } else {
          clause.param = null;
          this.scope.enter(SCOPE_OTHER);
        }
  
        clause.body = this.withTopicForbiddingContext(() => this.parseBlock(false, false));
        this.scope.exit();
        node.handler = this.finishNode(clause, "CatchClause");
      }
  
      node.finalizer = this.eat(types$1._finally) ? this.parseBlock() : null;
  
      if (!node.handler && !node.finalizer) {
        this.raise(node.start, ErrorMessages.NoCatchOrFinally);
      }
  
      return this.finishNode(node, "TryStatement");
    }
  
    parseVarStatement(node, kind) {
      this.next();
      this.parseVar(node, false, kind);
      this.semicolon();
      return this.finishNode(node, "VariableDeclaration");
    }
  
    parseWhileStatement(node) {
      this.next();
      node.test = this.parseHeaderExpression();
      this.state.labels.push(loopLabel);
      node.body = this.withTopicForbiddingContext(() => this.parseStatement("while"));
      this.state.labels.pop();
      return this.finishNode(node, "WhileStatement");
    }
  
    parseWithStatement(node) {
      if (this.state.strict) {
        this.raise(this.state.start, ErrorMessages.StrictWith);
      }
  
      this.next();
      node.object = this.parseHeaderExpression();
      node.body = this.withTopicForbiddingContext(() => this.parseStatement("with"));
      return this.finishNode(node, "WithStatement");
    }
  
    parseEmptyStatement(node) {
      this.next();
      return this.finishNode(node, "EmptyStatement");
    }
  
    parseLabeledStatement(node, maybeName, expr, context) {
      for (const label of this.state.labels) {
        if (label.name === maybeName) {
          this.raise(expr.start, ErrorMessages.LabelRedeclaration, maybeName);
        }
      }
  
      const kind = this.state.type.isLoop ? "loop" : this.match(types$1._switch) ? "switch" : null;
  
      for (let i = this.state.labels.length - 1; i >= 0; i--) {
        const label = this.state.labels[i];
  
        if (label.statementStart === node.start) {
          label.statementStart = this.state.start;
          label.kind = kind;
        } else {
          break;
        }
      }
  
      this.state.labels.push({
        name: maybeName,
        kind: kind,
        statementStart: this.state.start
      });
      node.body = this.parseStatement(context ? context.indexOf("label") === -1 ? context + "label" : context : "label");
      this.state.labels.pop();
      node.label = expr;
      return this.finishNode(node, "LabeledStatement");
    }
  
    parseExpressionStatement(node, expr) {
      node.expression = expr;
      this.semicolon();
      return this.finishNode(node, "ExpressionStatement");
    }
  
    parseBlock(allowDirectives = false, createNewLexicalScope = true, afterBlockParse) {
      const node = this.startNode();
  
      if (allowDirectives) {
        this.state.strictErrors.clear();
      }
  
      this.expect(types$1.braceL);
  
      if (createNewLexicalScope) {
        this.scope.enter(SCOPE_OTHER);
      }
  
      this.parseBlockBody(node, allowDirectives, false, types$1.braceR, afterBlockParse);
  
      if (createNewLexicalScope) {
        this.scope.exit();
      }
  
      return this.finishNode(node, "BlockStatement");
    }
  
    isValidDirective(stmt) {
      return stmt.type === "ExpressionStatement" && stmt.expression.type === "StringLiteral" && !stmt.expression.extra.parenthesized;
    }
  
    parseBlockBody(node, allowDirectives, topLevel, end, afterBlockParse) {
      const body = node.body = [];
      const directives = node.directives = [];
      this.parseBlockOrModuleBlockBody(body, allowDirectives ? directives : undefined, topLevel, end, afterBlockParse);
    }
  
    parseBlockOrModuleBlockBody(body, directives, topLevel, end, afterBlockParse) {
      const oldStrict = this.state.strict;
      let hasStrictModeDirective = false;
      let parsedNonDirective = false;
  
      while (!this.match(end)) {
        const stmt = this.parseStatement(null, topLevel);
  
        if (directives && !parsedNonDirective) {
          if (this.isValidDirective(stmt)) {
            const directive = this.stmtToDirective(stmt);
            directives.push(directive);
  
            if (!hasStrictModeDirective && directive.value.value === "use strict") {
              hasStrictModeDirective = true;
              this.setStrict(true);
            }
  
            continue;
          }
  
          parsedNonDirective = true;
          this.state.strictErrors.clear();
        }
  
        body.push(stmt);
      }
  
      if (afterBlockParse) {
        afterBlockParse.call(this, hasStrictModeDirective);
      }
  
      if (!oldStrict) {
        this.setStrict(false);
      }
  
      this.next();
    }
  
    parseFor(node, init) {
      node.init = init;
      this.semicolon(false);
      node.test = this.match(types$1.semi) ? null : this.parseExpression();
      this.semicolon(false);
      node.update = this.match(types$1.parenR) ? null : this.parseExpression();
      this.expect(types$1.parenR);
      node.body = this.withTopicForbiddingContext(() => this.parseStatement("for"));
      this.scope.exit();
      this.state.labels.pop();
      return this.finishNode(node, "ForStatement");
    }
  
    parseForIn(node, init, awaitAt) {
      const isForIn = this.match(types$1._in);
      this.next();
  
      if (isForIn) {
        if (awaitAt > -1) this.unexpected(awaitAt);
      } else {
        node.await = awaitAt > -1;
      }
  
      if (init.type === "VariableDeclaration" && init.declarations[0].init != null && (!isForIn || this.state.strict || init.kind !== "var" || init.declarations[0].id.type !== "Identifier")) {
        this.raise(init.start, ErrorMessages.ForInOfLoopInitializer, isForIn ? "for-in" : "for-of");
      } else if (init.type === "AssignmentPattern") {
        this.raise(init.start, ErrorMessages.InvalidLhs, "for-loop");
      }
  
      node.left = init;
      node.right = isForIn ? this.parseExpression() : this.parseMaybeAssignAllowIn();
      this.expect(types$1.parenR);
      node.body = this.withTopicForbiddingContext(() => this.parseStatement("for"));
      this.scope.exit();
      this.state.labels.pop();
      return this.finishNode(node, isForIn ? "ForInStatement" : "ForOfStatement");
    }
  
    parseVar(node, isFor, kind) {
      const declarations = node.declarations = [];
      const isTypescript = this.hasPlugin("typescript");
      node.kind = kind;
  
      for (;;) {
        const decl = this.startNode();
        this.parseVarId(decl, kind);
  
        if (this.eat(types$1.eq)) {
          decl.init = isFor ? this.parseMaybeAssignDisallowIn() : this.parseMaybeAssignAllowIn();
        } else {
          if (kind === "const" && !(this.match(types$1._in) || this.isContextual("of"))) {
            if (!isTypescript) {
              this.raise(this.state.lastTokEnd, ErrorMessages.DeclarationMissingInitializer, "Const declarations");
            }
          } else if (decl.id.type !== "Identifier" && !(isFor && (this.match(types$1._in) || this.isContextual("of")))) {
            this.raise(this.state.lastTokEnd, ErrorMessages.DeclarationMissingInitializer, "Complex binding patterns");
          }
  
          decl.init = null;
        }
  
        declarations.push(this.finishNode(decl, "VariableDeclarator"));
        if (!this.eat(types$1.comma)) break;
      }
  
      return node;
    }
  
    parseVarId(decl, kind) {
      decl.id = this.parseBindingAtom();
      this.checkLVal(decl.id, "variable declaration", kind === "var" ? BIND_VAR : BIND_LEXICAL, undefined, kind !== "var");
    }
  
    parseFunction(node, statement = FUNC_NO_FLAGS, isAsync = false) {
      const isStatement = statement & FUNC_STATEMENT;
      const isHangingStatement = statement & FUNC_HANGING_STATEMENT;
      const requireId = !!isStatement && !(statement & FUNC_NULLABLE_ID);
      this.initFunction(node, isAsync);
  
      if (this.match(types$1.star) && isHangingStatement) {
        this.raise(this.state.start, ErrorMessages.GeneratorInSingleStatementContext);
      }
  
      node.generator = this.eat(types$1.star);
  
      if (isStatement) {
        node.id = this.parseFunctionId(requireId);
      }
  
      const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
      this.state.maybeInArrowParameters = false;
      this.scope.enter(SCOPE_FUNCTION);
      this.prodParam.enter(functionFlags(isAsync, node.generator));
  
      if (!isStatement) {
        node.id = this.parseFunctionId();
      }
  
      this.parseFunctionParams(node, false);
      this.withTopicForbiddingContext(() => {
        this.parseFunctionBodyAndFinish(node, isStatement ? "FunctionDeclaration" : "FunctionExpression");
      });
      this.prodParam.exit();
      this.scope.exit();
  
      if (isStatement && !isHangingStatement) {
        this.registerFunctionStatementId(node);
      }
  
      this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
      return node;
    }
  
    parseFunctionId(requireId) {
      return requireId || this.match(types$1.name) ? this.parseIdentifier() : null;
    }
  
    parseFunctionParams(node, allowModifiers) {
      this.expect(types$1.parenL);
      this.expressionScope.enter(newParameterDeclarationScope());
      node.params = this.parseBindingList(types$1.parenR, 41, false, allowModifiers);
      this.expressionScope.exit();
    }
  
    registerFunctionStatementId(node) {
      if (!node.id) return;
      this.scope.declareName(node.id.name, this.state.strict || node.generator || node.async ? this.scope.treatFunctionsAsVar ? BIND_VAR : BIND_LEXICAL : BIND_FUNCTION, node.id.start);
    }
  
    parseClass(node, isStatement, optionalId) {
      this.next();
      this.takeDecorators(node);
      const oldStrict = this.state.strict;
      this.state.strict = true;
      this.parseClassId(node, isStatement, optionalId);
      this.parseClassSuper(node);
      node.body = this.parseClassBody(!!node.superClass, oldStrict);
      return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression");
    }
  
    isClassProperty() {
      return this.match(types$1.eq) || this.match(types$1.semi) || this.match(types$1.braceR);
    }
  
    isClassMethod() {
      return this.match(types$1.parenL);
    }
  
    isNonstaticConstructor(method) {
      return !method.computed && !method.static && (method.key.name === "constructor" || method.key.value === "constructor");
    }
  
    parseClassBody(hadSuperClass, oldStrict) {
      this.classScope.enter();
      const state = {
        hadConstructor: false,
        hadSuperClass
      };
      let decorators = [];
      const classBody = this.startNode();
      classBody.body = [];
      this.expect(types$1.braceL);
      this.withTopicForbiddingContext(() => {
        while (!this.match(types$1.braceR)) {
          if (this.eat(types$1.semi)) {
            if (decorators.length > 0) {
              throw this.raise(this.state.lastTokEnd, ErrorMessages.DecoratorSemicolon);
            }
  
            continue;
          }
  
          if (this.match(types$1.at)) {
            decorators.push(this.parseDecorator());
            continue;
          }
  
          const member = this.startNode();
  
          if (decorators.length) {
            member.decorators = decorators;
            this.resetStartLocationFromNode(member, decorators[0]);
            decorators = [];
          }
  
          this.parseClassMember(classBody, member, state);
  
          if (member.kind === "constructor" && member.decorators && member.decorators.length > 0) {
            this.raise(member.start, ErrorMessages.DecoratorConstructor);
          }
        }
      });
      this.state.strict = oldStrict;
      this.next();
  
      if (decorators.length) {
        throw this.raise(this.state.start, ErrorMessages.TrailingDecorator);
      }
  
      this.classScope.exit();
      return this.finishNode(classBody, "ClassBody");
    }
  
    parseClassMemberFromModifier(classBody, member) {
      const key = this.parseIdentifier(true);
  
      if (this.isClassMethod()) {
        const method = member;
        method.kind = "method";
        method.computed = false;
        method.key = key;
        method.static = false;
        this.pushClassMethod(classBody, method, false, false, false, false);
        return true;
      } else if (this.isClassProperty()) {
        const prop = member;
        prop.computed = false;
        prop.key = key;
        prop.static = false;
        classBody.body.push(this.parseClassProperty(prop));
        return true;
      }
  
      this.resetPreviousNodeTrailingComments(key);
      return false;
    }
  
    parseClassMember(classBody, member, state) {
      const isStatic = this.isContextual("static");
  
      if (isStatic) {
        if (this.parseClassMemberFromModifier(classBody, member)) {
          return;
        }
  
        if (this.eat(types$1.braceL)) {
          this.parseClassStaticBlock(classBody, member);
          return;
        }
      }
  
      this.parseClassMemberWithIsStatic(classBody, member, state, isStatic);
    }
  
    parseClassMemberWithIsStatic(classBody, member, state, isStatic) {
      const publicMethod = member;
      const privateMethod = member;
      const publicProp = member;
      const privateProp = member;
      const method = publicMethod;
      const publicMember = publicMethod;
      member.static = isStatic;
  
      if (this.eat(types$1.star)) {
        method.kind = "method";
        const isPrivateName = this.match(types$1.privateName);
        this.parseClassElementName(method);
  
        if (isPrivateName) {
          this.pushClassPrivateMethod(classBody, privateMethod, true, false);
          return;
        }
  
        if (this.isNonstaticConstructor(publicMethod)) {
          this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsGenerator);
        }
  
        this.pushClassMethod(classBody, publicMethod, true, false, false, false);
        return;
      }
  
      const isContextual = this.match(types$1.name) && !this.state.containsEsc;
      const isPrivate = this.match(types$1.privateName);
      const key = this.parseClassElementName(member);
      const maybeQuestionTokenStart = this.state.start;
      this.parsePostMemberNameModifiers(publicMember);
  
      if (this.isClassMethod()) {
        method.kind = "method";
  
        if (isPrivate) {
          this.pushClassPrivateMethod(classBody, privateMethod, false, false);
          return;
        }
  
        const isConstructor = this.isNonstaticConstructor(publicMethod);
        let allowsDirectSuper = false;
  
        if (isConstructor) {
          publicMethod.kind = "constructor";
  
          if (state.hadConstructor && !this.hasPlugin("typescript")) {
            this.raise(key.start, ErrorMessages.DuplicateConstructor);
          }
  
          if (isConstructor && this.hasPlugin("typescript") && member.override) {
            this.raise(key.start, ErrorMessages.OverrideOnConstructor);
          }
  
          state.hadConstructor = true;
          allowsDirectSuper = state.hadSuperClass;
        }
  
        this.pushClassMethod(classBody, publicMethod, false, false, isConstructor, allowsDirectSuper);
      } else if (this.isClassProperty()) {
        if (isPrivate) {
          this.pushClassPrivateProperty(classBody, privateProp);
        } else {
          this.pushClassProperty(classBody, publicProp);
        }
      } else if (isContextual && key.name === "async" && !this.isLineTerminator()) {
        this.resetPreviousNodeTrailingComments(key);
        const isGenerator = this.eat(types$1.star);
  
        if (publicMember.optional) {
          this.unexpected(maybeQuestionTokenStart);
        }
  
        method.kind = "method";
        const isPrivate = this.match(types$1.privateName);
        this.parseClassElementName(method);
        this.parsePostMemberNameModifiers(publicMember);
  
        if (isPrivate) {
          this.pushClassPrivateMethod(classBody, privateMethod, isGenerator, true);
        } else {
          if (this.isNonstaticConstructor(publicMethod)) {
            this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsAsync);
          }
  
          this.pushClassMethod(classBody, publicMethod, isGenerator, true, false, false);
        }
      } else if (isContextual && (key.name === "get" || key.name === "set") && !(this.match(types$1.star) && this.isLineTerminator())) {
        this.resetPreviousNodeTrailingComments(key);
        method.kind = key.name;
        const isPrivate = this.match(types$1.privateName);
        this.parseClassElementName(publicMethod);
  
        if (isPrivate) {
          this.pushClassPrivateMethod(classBody, privateMethod, false, false);
        } else {
          if (this.isNonstaticConstructor(publicMethod)) {
            this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsAccessor);
          }
  
          this.pushClassMethod(classBody, publicMethod, false, false, false, false);
        }
  
        this.checkGetterSetterParams(publicMethod);
      } else if (this.isLineTerminator()) {
        if (isPrivate) {
          this.pushClassPrivateProperty(classBody, privateProp);
        } else {
          this.pushClassProperty(classBody, publicProp);
        }
      } else {
        this.unexpected();
      }
    }
  
    parseClassElementName(member) {
      const {
        type,
        value,
        start
      } = this.state;
  
      if ((type === types$1.name || type === types$1.string) && member.static && value === "prototype") {
        this.raise(start, ErrorMessages.StaticPrototype);
      }
  
      if (type === types$1.privateName && value === "constructor") {
        this.raise(start, ErrorMessages.ConstructorClassPrivateField);
      }
  
      return this.parsePropertyName(member, true);
    }
  
    parseClassStaticBlock(classBody, member) {
      var _member$decorators;
  
      this.expectPlugin("classStaticBlock", member.start);
      this.scope.enter(SCOPE_CLASS | SCOPE_STATIC_BLOCK | SCOPE_SUPER);
      const oldLabels = this.state.labels;
      this.state.labels = [];
      this.prodParam.enter(PARAM);
      const body = member.body = [];
      this.parseBlockOrModuleBlockBody(body, undefined, false, types$1.braceR);
      this.prodParam.exit();
      this.scope.exit();
      this.state.labels = oldLabels;
      classBody.body.push(this.finishNode(member, "StaticBlock"));
  
      if ((_member$decorators = member.decorators) != null && _member$decorators.length) {
        this.raise(member.start, ErrorMessages.DecoratorStaticBlock);
      }
    }
  
    pushClassProperty(classBody, prop) {
      if (!prop.computed && (prop.key.name === "constructor" || prop.key.value === "constructor")) {
        this.raise(prop.key.start, ErrorMessages.ConstructorClassField);
      }
  
      classBody.body.push(this.parseClassProperty(prop));
    }
  
    pushClassPrivateProperty(classBody, prop) {
      const node = this.parseClassPrivateProperty(prop);
      classBody.body.push(node);
      this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), CLASS_ELEMENT_OTHER, node.key.start);
    }
  
    pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) {
      classBody.body.push(this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true));
    }
  
    pushClassPrivateMethod(classBody, method, isGenerator, isAsync) {
      const node = this.parseMethod(method, isGenerator, isAsync, false, false, "ClassPrivateMethod", true);
      classBody.body.push(node);
      const kind = node.kind === "get" ? node.static ? CLASS_ELEMENT_STATIC_GETTER : CLASS_ELEMENT_INSTANCE_GETTER : node.kind === "set" ? node.static ? CLASS_ELEMENT_STATIC_SETTER : CLASS_ELEMENT_INSTANCE_SETTER : CLASS_ELEMENT_OTHER;
      this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), kind, node.key.start);
    }
  
    parsePostMemberNameModifiers(methodOrProp) {}
  
    parseClassPrivateProperty(node) {
      this.parseInitializer(node);
      this.semicolon();
      return this.finishNode(node, "ClassPrivateProperty");
    }
  
    parseClassProperty(node) {
      this.parseInitializer(node);
      this.semicolon();
      return this.finishNode(node, "ClassProperty");
    }
  
    parseInitializer(node) {
      this.scope.enter(SCOPE_CLASS | SCOPE_SUPER);
      this.expressionScope.enter(newExpressionScope());
      this.prodParam.enter(PARAM);
      node.value = this.eat(types$1.eq) ? this.parseMaybeAssignAllowIn() : null;
      this.expressionScope.exit();
      this.prodParam.exit();
      this.scope.exit();
    }
  
    parseClassId(node, isStatement, optionalId, bindingType = BIND_CLASS) {
      if (this.match(types$1.name)) {
        node.id = this.parseIdentifier();
  
        if (isStatement) {
          this.checkLVal(node.id, "class name", bindingType);
        }
      } else {
        if (optionalId || !isStatement) {
          node.id = null;
        } else {
          this.unexpected(null, ErrorMessages.MissingClassName);
        }
      }
    }
  
    parseClassSuper(node) {
      node.superClass = this.eat(types$1._extends) ? this.parseExprSubscripts() : null;
    }
  
    parseExport(node) {
      const hasDefault = this.maybeParseExportDefaultSpecifier(node);
      const parseAfterDefault = !hasDefault || this.eat(types$1.comma);
      const hasStar = parseAfterDefault && this.eatExportStar(node);
      const hasNamespace = hasStar && this.maybeParseExportNamespaceSpecifier(node);
      const parseAfterNamespace = parseAfterDefault && (!hasNamespace || this.eat(types$1.comma));
      const isFromRequired = hasDefault || hasStar;
  
      if (hasStar && !hasNamespace) {
        if (hasDefault) this.unexpected();
        this.parseExportFrom(node, true);
        return this.finishNode(node, "ExportAllDeclaration");
      }
  
      const hasSpecifiers = this.maybeParseExportNamedSpecifiers(node);
  
      if (hasDefault && parseAfterDefault && !hasStar && !hasSpecifiers || hasNamespace && parseAfterNamespace && !hasSpecifiers) {
        throw this.unexpected(null, types$1.braceL);
      }
  
      let hasDeclaration;
  
      if (isFromRequired || hasSpecifiers) {
        hasDeclaration = false;
        this.parseExportFrom(node, isFromRequired);
      } else {
        hasDeclaration = this.maybeParseExportDeclaration(node);
      }
  
      if (isFromRequired || hasSpecifiers || hasDeclaration) {
        this.checkExport(node, true, false, !!node.source);
        return this.finishNode(node, "ExportNamedDeclaration");
      }
  
      if (this.eat(types$1._default)) {
        node.declaration = this.parseExportDefaultExpression();
        this.checkExport(node, true, true);
        return this.finishNode(node, "ExportDefaultDeclaration");
      }
  
      throw this.unexpected(null, types$1.braceL);
    }
  
    eatExportStar(node) {
      return this.eat(types$1.star);
    }
  
    maybeParseExportDefaultSpecifier(node) {
      if (this.isExportDefaultSpecifier()) {
        this.expectPlugin("exportDefaultFrom");
        const specifier = this.startNode();
        specifier.exported = this.parseIdentifier(true);
        node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")];
        return true;
      }
  
      return false;
    }
  
    maybeParseExportNamespaceSpecifier(node) {
      if (this.isContextual("as")) {
        if (!node.specifiers) node.specifiers = [];
        const specifier = this.startNodeAt(this.state.lastTokStart, this.state.lastTokStartLoc);
        this.next();
        specifier.exported = this.parseModuleExportName();
        node.specifiers.push(this.finishNode(specifier, "ExportNamespaceSpecifier"));
        return true;
      }
  
      return false;
    }
  
    maybeParseExportNamedSpecifiers(node) {
      if (this.match(types$1.braceL)) {
        if (!node.specifiers) node.specifiers = [];
        node.specifiers.push(...this.parseExportSpecifiers());
        node.source = null;
        node.declaration = null;
        return true;
      }
  
      return false;
    }
  
    maybeParseExportDeclaration(node) {
      if (this.shouldParseExportDeclaration()) {
        node.specifiers = [];
        node.source = null;
        node.declaration = this.parseExportDeclaration(node);
        return true;
      }
  
      return false;
    }
  
    isAsyncFunction() {
      if (!this.isContextual("async")) return false;
      const next = this.nextTokenStart();
      return !lineBreak.test(this.input.slice(this.state.pos, next)) && this.isUnparsedContextual(next, "function");
    }
  
    parseExportDefaultExpression() {
      const expr = this.startNode();
      const isAsync = this.isAsyncFunction();
  
      if (this.match(types$1._function) || isAsync) {
        this.next();
  
        if (isAsync) {
          this.next();
        }
  
        return this.parseFunction(expr, FUNC_STATEMENT | FUNC_NULLABLE_ID, isAsync);
      } else if (this.match(types$1._class)) {
        return this.parseClass(expr, true, true);
      } else if (this.match(types$1.at)) {
        if (this.hasPlugin("decorators") && this.getPluginOption("decorators", "decoratorsBeforeExport")) {
          this.raise(this.state.start, ErrorMessages.DecoratorBeforeExport);
        }
  
        this.parseDecorators(false);
        return this.parseClass(expr, true, true);
      } else if (this.match(types$1._const) || this.match(types$1._var) || this.isLet()) {
        throw this.raise(this.state.start, ErrorMessages.UnsupportedDefaultExport);
      } else {
        const res = this.parseMaybeAssignAllowIn();
        this.semicolon();
        return res;
      }
    }
  
    parseExportDeclaration(node) {
      return this.parseStatement(null);
    }
  
    isExportDefaultSpecifier() {
      if (this.match(types$1.name)) {
        const value = this.state.value;
  
        if (value === "async" && !this.state.containsEsc || value === "let") {
          return false;
        }
  
        if ((value === "type" || value === "interface") && !this.state.containsEsc) {
          const l = this.lookahead();
  
          if (l.type === types$1.name && l.value !== "from" || l.type === types$1.braceL) {
            this.expectOnePlugin(["flow", "typescript"]);
            return false;
          }
        }
      } else if (!this.match(types$1._default)) {
        return false;
      }
  
      const next = this.nextTokenStart();
      const hasFrom = this.isUnparsedContextual(next, "from");
  
      if (this.input.charCodeAt(next) === 44 || this.match(types$1.name) && hasFrom) {
        return true;
      }
  
      if (this.match(types$1._default) && hasFrom) {
        const nextAfterFrom = this.input.charCodeAt(this.nextTokenStartSince(next + 4));
        return nextAfterFrom === 34 || nextAfterFrom === 39;
      }
  
      return false;
    }
  
    parseExportFrom(node, expect) {
      if (this.eatContextual("from")) {
        node.source = this.parseImportSource();
        this.checkExport(node);
        const assertions = this.maybeParseImportAssertions();
  
        if (assertions) {
          node.assertions = assertions;
        }
      } else {
        if (expect) {
          this.unexpected();
        } else {
          node.source = null;
        }
      }
  
      this.semicolon();
    }
  
    shouldParseExportDeclaration() {
      if (this.match(types$1.at)) {
        this.expectOnePlugin(["decorators", "decorators-legacy"]);
  
        if (this.hasPlugin("decorators")) {
          if (this.getPluginOption("decorators", "decoratorsBeforeExport")) {
            this.unexpected(this.state.start, ErrorMessages.DecoratorBeforeExport);
          } else {
            return true;
          }
        }
      }
  
      return this.state.type.keyword === "var" || this.state.type.keyword === "const" || this.state.type.keyword === "function" || this.state.type.keyword === "class" || this.isLet() || this.isAsyncFunction();
    }
  
    checkExport(node, checkNames, isDefault, isFrom) {
      if (checkNames) {
        if (isDefault) {
          this.checkDuplicateExports(node, "default");
  
          if (this.hasPlugin("exportDefaultFrom")) {
            var _declaration$extra;
  
            const declaration = node.declaration;
  
            if (declaration.type === "Identifier" && declaration.name === "from" && declaration.end - declaration.start === 4 && !((_declaration$extra = declaration.extra) != null && _declaration$extra.parenthesized)) {
              this.raise(declaration.start, ErrorMessages.ExportDefaultFromAsIdentifier);
            }
          }
        } else if (node.specifiers && node.specifiers.length) {
          for (const specifier of node.specifiers) {
            const {
              exported
            } = specifier;
            const exportedName = exported.type === "Identifier" ? exported.name : exported.value;
            this.checkDuplicateExports(specifier, exportedName);
  
            if (!isFrom && specifier.local) {
              const {
                local
              } = specifier;
  
              if (local.type !== "Identifier") {
                this.raise(specifier.start, ErrorMessages.ExportBindingIsString, local.value, exportedName);
              } else {
                this.checkReservedWord(local.name, local.start, true, false);
                this.scope.checkLocalExport(local);
              }
            }
          }
        } else if (node.declaration) {
          if (node.declaration.type === "FunctionDeclaration" || node.declaration.type === "ClassDeclaration") {
            const id = node.declaration.id;
            if (!id) throw new Error("Assertion failure");
            this.checkDuplicateExports(node, id.name);
          } else if (node.declaration.type === "VariableDeclaration") {
            for (const declaration of node.declaration.declarations) {
              this.checkDeclaration(declaration.id);
            }
          }
        }
      }
  
      const currentContextDecorators = this.state.decoratorStack[this.state.decoratorStack.length - 1];
  
      if (currentContextDecorators.length) {
        throw this.raise(node.start, ErrorMessages.UnsupportedDecoratorExport);
      }
    }
  
    checkDeclaration(node) {
      if (node.type === "Identifier") {
        this.checkDuplicateExports(node, node.name);
      } else if (node.type === "ObjectPattern") {
        for (const prop of node.properties) {
          this.checkDeclaration(prop);
        }
      } else if (node.type === "ArrayPattern") {
        for (const elem of node.elements) {
          if (elem) {
            this.checkDeclaration(elem);
          }
        }
      } else if (node.type === "ObjectProperty") {
        this.checkDeclaration(node.value);
      } else if (node.type === "RestElement") {
        this.checkDeclaration(node.argument);
      } else if (node.type === "AssignmentPattern") {
        this.checkDeclaration(node.left);
      }
    }
  
    checkDuplicateExports(node, name) {
      if (this.exportedIdentifiers.has(name)) {
        this.raise(node.start, name === "default" ? ErrorMessages.DuplicateDefaultExport : ErrorMessages.DuplicateExport, name);
      }
  
      this.exportedIdentifiers.add(name);
    }
  
    parseExportSpecifiers() {
      const nodes = [];
      let first = true;
      this.expect(types$1.braceL);
  
      while (!this.eat(types$1.braceR)) {
        if (first) {
          first = false;
        } else {
          this.expect(types$1.comma);
          if (this.eat(types$1.braceR)) break;
        }
  
        const node = this.startNode();
        node.local = this.parseModuleExportName();
        node.exported = this.eatContextual("as") ? this.parseModuleExportName() : node.local.__clone();
        nodes.push(this.finishNode(node, "ExportSpecifier"));
      }
  
      return nodes;
    }
  
    parseModuleExportName() {
      if (this.match(types$1.string)) {
        const result = this.parseStringLiteral(this.state.value);
        const surrogate = result.value.match(loneSurrogate);
  
        if (surrogate) {
          this.raise(result.start, ErrorMessages.ModuleExportNameHasLoneSurrogate, surrogate[0].charCodeAt(0).toString(16));
        }
  
        return result;
      }
  
      return this.parseIdentifier(true);
    }
  
    parseImport(node) {
      node.specifiers = [];
  
      if (!this.match(types$1.string)) {
        const hasDefault = this.maybeParseDefaultImportSpecifier(node);
        const parseNext = !hasDefault || this.eat(types$1.comma);
        const hasStar = parseNext && this.maybeParseStarImportSpecifier(node);
        if (parseNext && !hasStar) this.parseNamedImportSpecifiers(node);
        this.expectContextual("from");
      }
  
      node.source = this.parseImportSource();
      const assertions = this.maybeParseImportAssertions();
  
      if (assertions) {
        node.assertions = assertions;
      } else {
        const attributes = this.maybeParseModuleAttributes();
  
        if (attributes) {
          node.attributes = attributes;
        }
      }
  
      this.semicolon();
      return this.finishNode(node, "ImportDeclaration");
    }
  
    parseImportSource() {
      if (!this.match(types$1.string)) this.unexpected();
      return this.parseExprAtom();
    }
  
    shouldParseDefaultImport(node) {
      return this.match(types$1.name);
    }
  
    parseImportSpecifierLocal(node, specifier, type, contextDescription) {
      specifier.local = this.parseIdentifier();
      this.checkLVal(specifier.local, contextDescription, BIND_LEXICAL);
      node.specifiers.push(this.finishNode(specifier, type));
    }
  
    parseAssertEntries() {
      const attrs = [];
      const attrNames = new Set();
  
      do {
        if (this.match(types$1.braceR)) {
          break;
        }
  
        const node = this.startNode();
        const keyName = this.state.value;
  
        if (attrNames.has(keyName)) {
          this.raise(this.state.start, ErrorMessages.ModuleAttributesWithDuplicateKeys, keyName);
        }
  
        attrNames.add(keyName);
  
        if (this.match(types$1.string)) {
          node.key = this.parseStringLiteral(keyName);
        } else {
          node.key = this.parseIdentifier(true);
        }
  
        this.expect(types$1.colon);
  
        if (!this.match(types$1.string)) {
          throw this.unexpected(this.state.start, ErrorMessages.ModuleAttributeInvalidValue);
        }
  
        node.value = this.parseStringLiteral(this.state.value);
        this.finishNode(node, "ImportAttribute");
        attrs.push(node);
      } while (this.eat(types$1.comma));
  
      return attrs;
    }
  
    maybeParseModuleAttributes() {
      if (this.match(types$1._with) && !this.hasPrecedingLineBreak()) {
        this.expectPlugin("moduleAttributes");
        this.next();
      } else {
        if (this.hasPlugin("moduleAttributes")) return [];
        return null;
      }
  
      const attrs = [];
      const attributes = new Set();
  
      do {
        const node = this.startNode();
        node.key = this.parseIdentifier(true);
  
        if (node.key.name !== "type") {
          this.raise(node.key.start, ErrorMessages.ModuleAttributeDifferentFromType, node.key.name);
        }
  
        if (attributes.has(node.key.name)) {
          this.raise(node.key.start, ErrorMessages.ModuleAttributesWithDuplicateKeys, node.key.name);
        }
  
        attributes.add(node.key.name);
        this.expect(types$1.colon);
  
        if (!this.match(types$1.string)) {
          throw this.unexpected(this.state.start, ErrorMessages.ModuleAttributeInvalidValue);
        }
  
        node.value = this.parseStringLiteral(this.state.value);
        this.finishNode(node, "ImportAttribute");
        attrs.push(node);
      } while (this.eat(types$1.comma));
  
      return attrs;
    }
  
    maybeParseImportAssertions() {
      if (this.isContextual("assert") && !this.hasPrecedingLineBreak()) {
        this.expectPlugin("importAssertions");
        this.next();
      } else {
        if (this.hasPlugin("importAssertions")) return [];
        return null;
      }
  
      this.eat(types$1.braceL);
      const attrs = this.parseAssertEntries();
      this.eat(types$1.braceR);
      return attrs;
    }
  
    maybeParseDefaultImportSpecifier(node) {
      if (this.shouldParseDefaultImport(node)) {
        this.parseImportSpecifierLocal(node, this.startNode(), "ImportDefaultSpecifier", "default import specifier");
        return true;
      }
  
      return false;
    }
  
    maybeParseStarImportSpecifier(node) {
      if (this.match(types$1.star)) {
        const specifier = this.startNode();
        this.next();
        this.expectContextual("as");
        this.parseImportSpecifierLocal(node, specifier, "ImportNamespaceSpecifier", "import namespace specifier");
        return true;
      }
  
      return false;
    }
  
    parseNamedImportSpecifiers(node) {
      let first = true;
      this.expect(types$1.braceL);
  
      while (!this.eat(types$1.braceR)) {
        if (first) {
          first = false;
        } else {
          if (this.eat(types$1.colon)) {
            throw this.raise(this.state.start, ErrorMessages.DestructureNamedImport);
          }
  
          this.expect(types$1.comma);
          if (this.eat(types$1.braceR)) break;
        }
  
        this.parseImportSpecifier(node);
      }
    }
  
    parseImportSpecifier(node) {
      const specifier = this.startNode();
      const importedIsString = this.match(types$1.string);
      specifier.imported = this.parseModuleExportName();
  
      if (this.eatContextual("as")) {
        specifier.local = this.parseIdentifier();
      } else {
        const {
          imported
        } = specifier;
  
        if (importedIsString) {
          throw this.raise(specifier.start, ErrorMessages.ImportBindingIsString, imported.value);
        }
  
        this.checkReservedWord(imported.name, specifier.start, true, true);
        specifier.local = imported.__clone();
      }
  
      this.checkLVal(specifier.local, "import specifier", BIND_LEXICAL);
      node.specifiers.push(this.finishNode(specifier, "ImportSpecifier"));
    }
  
    isThisParam(param) {
      return param.type === "Identifier" && param.name === "this";
    }
  
  }
  
  class Parser extends StatementParser {
    constructor(options, input) {
      options = getOptions(options);
      super(options, input);
      this.options = options;
      this.initializeScopes();
      this.plugins = pluginsMap(this.options.plugins);
      this.filename = options.sourceFilename;
    }
  
    getScopeHandler() {
      return ScopeHandler;
    }
  
    parse() {
      this.enterInitialScopes();
      const file = this.startNode();
      const program = this.startNode();
      this.nextToken();
      file.errors = null;
      this.parseTopLevel(file, program);
      file.errors = this.state.errors;
      return file;
    }
  
  }
  
  function pluginsMap(plugins) {
    const pluginMap = new Map();
  
    for (const plugin of plugins) {
      const [name, options] = Array.isArray(plugin) ? plugin : [plugin, {}];
      if (!pluginMap.has(name)) pluginMap.set(name, options || {});
    }
  
    return pluginMap;
  }
  
  function parse(input, options) {
    var _options;
  
    if (((_options = options) == null ? void 0 : _options.sourceType) === "unambiguous") {
      options = Object.assign({}, options);
  
      try {
        options.sourceType = "module";
        const parser = getParser(options, input);
        const ast = parser.parse();
  
        if (parser.sawUnambiguousESM) {
          return ast;
        }
  
        if (parser.ambiguousScriptDifferentAst) {
          try {
            options.sourceType = "script";
            return getParser(options, input).parse();
          } catch (_unused) {}
        } else {
          ast.program.sourceType = "script";
        }
  
        return ast;
      } catch (moduleError) {
        try {
          options.sourceType = "script";
          return getParser(options, input).parse();
        } catch (_unused2) {}
  
        throw moduleError;
      }
    } else {
      return getParser(options, input).parse();
    }
  }
  function parseExpression(input, options) {
    const parser = getParser(options, input);
  
    if (parser.options.strictMode) {
      parser.state.strict = true;
    }
  
    return parser.getExpression();
  }
  
  function getParser(options, input) {
    let cls = Parser;
  
    if (options != null && options.plugins) {
      validatePlugins(options.plugins);
      cls = getParserClass(options.plugins);
    }
  
    return new cls(options, input);
  }
  
  const parserClassCache = {};
  
  function getParserClass(pluginsFromOptions) {
    const pluginList = mixinPluginNames.filter(name => hasPlugin(pluginsFromOptions, name));
    const key = pluginList.join("/");
    let cls = parserClassCache[key];
  
    if (!cls) {
      cls = Parser;
  
      for (const plugin of pluginList) {
        cls = mixinPlugins[plugin](cls);
      }
  
      parserClassCache[key] = cls;
    }
  
    return cls;
  }
  
  exports.parse = parse;
  exports.parseExpression = parseExpression;
  exports.tokTypes = types$1;
  //# sourceMappingURL=index.js.map
  