text: "use strict";
  /**
   * @license
   * Copyright 2014 Palantir Technologies, Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  Object.defineProperty(exports, "__esModule", { value: true });
  var tslib_1 = require("tslib");
  var ts = require("typescript");
  var Lint = require("../index");
  var Rule = (function (_super) {
      tslib_1.__extends(Rule, _super);
      function Rule() {
          return _super !== null && _super.apply(this, arguments) || this;
      }
      /* tslint:enable:object-literal-sort-keys */
      Rule.FAILURE_STRING = function (name) {
          return "variable '" + name + "' used before declaration";
      };
      Rule.prototype.applyWithProgram = function (sourceFile, program) {
          return this.applyWithFunction(sourceFile, function (ctx) { return walk(ctx, program.getTypeChecker()); });
      };
      /* tslint:disable:object-literal-sort-keys */
      Rule.metadata = {
          ruleName: "no-use-before-declare",
          description: "Disallows usage of variables before their declaration.",
          descriptionDetails: (_a = ["\n            This rule is primarily useful when using the `var` keyword -\n            the compiler will detect if a `let` and `const` variable is used before it is declared."], _a.raw = ["\n            This rule is primarily useful when using the \\`var\\` keyword -\n            the compiler will detect if a \\`let\\` and \\`const\\` variable is used before it is declared."], Lint.Utils.dedent(_a)),
          optionsDescription: "Not configurable.",
          options: null,
          optionExamples: [true],
          type: "functionality",
          typescriptOnly: false,
          requiresTypeInfo: true,
      };
      return Rule;
  }(Lint.Rules.TypedRule));
  exports.Rule = Rule;
  function walk(ctx, checker) {
      return ts.forEachChild(ctx.sourceFile, function recur(node) {
          switch (node.kind) {
              case ts.SyntaxKind.TypeReference:
                  // Ignore types.
                  return;
              case ts.SyntaxKind.PropertyAccessExpression:
                  // Ignore `y` in `x.y`, but recurse to `x`.
                  return recur(node.expression);
              case ts.SyntaxKind.Identifier:
                  return checkIdentifier(node, checker.getSymbolAtLocation(node));
              case ts.SyntaxKind.ExportSpecifier:
                  return checkIdentifier(node.name, checker.getExportSpecifierLocalTargetSymbol(node));
              default:
                  return ts.forEachChild(node, recur);
          }
      });
      function checkIdentifier(node, symbol) {
          var declarations = symbol === undefined ? undefined : symbol.declarations;
          if (declarations === undefined || declarations.length === 0) {
              return;
          }
          var declaredBefore = declarations.some(function (decl) {
              switch (decl.kind) {
                  case ts.SyntaxKind.FunctionDeclaration:
                      // Functions may be declared later.
                      return true;
                  default:
                      // Use `<=` in case this *is* the declaration.
                      // If it's a global declared in a different file, OK.
                      return decl.pos <= node.pos || decl.getSourceFile() !== ctx.sourceFile;
              }
          });
          if (!declaredBefore) {
              ctx.addFailureAtNode(node, Rule.FAILURE_STRING(node.text));
          }
      }
  }
  var _a;
  