text: /**
   * @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.
   */
  "use strict";
  var __extends = (this && this.__extends) || function (d, b) {
      for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
      function __() { this.constructor = d; }
      d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  };
  var ts = require("typescript");
  var Lint = require("../index");
  var Rule = (function (_super) {
      __extends(Rule, _super);
      function Rule() {
          return _super.apply(this, arguments) || this;
      }
      Rule.prototype.apply = function (sourceFile, languageService) {
          return this.applyWithWalker(new NoUseBeforeDeclareWalker(sourceFile, this.getOptions(), languageService));
      };
      return Rule;
  }(Lint.Rules.AbstractRule));
  /* 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,
  };
  /* tslint:enable:object-literal-sort-keys */
  Rule.FAILURE_STRING_PREFIX = "variable '";
  Rule.FAILURE_STRING_POSTFIX = "' used before declaration";
  exports.Rule = Rule;
  var NoUseBeforeDeclareWalker = (function (_super) {
      __extends(NoUseBeforeDeclareWalker, _super);
      function NoUseBeforeDeclareWalker(sourceFile, options, languageService) {
          var _this = _super.call(this, sourceFile, options) || this;
          _this.languageService = languageService;
          _this.importedPropertiesPositions = [];
          return _this;
      }
      NoUseBeforeDeclareWalker.prototype.createScope = function () {
          return new Set();
      };
      NoUseBeforeDeclareWalker.prototype.visitBindingElement = function (node) {
          var isSingleVariable = node.name.kind === ts.SyntaxKind.Identifier;
          var isBlockScoped = Lint.isBlockScopedBindingElement(node);
          // use-before-declare errors for block-scoped vars are caught by tsc
          if (isSingleVariable && !isBlockScoped) {
              var variableName = node.name.text;
              this.validateUsageForVariable(variableName, node.name.getStart());
          }
          _super.prototype.visitBindingElement.call(this, node);
      };
      NoUseBeforeDeclareWalker.prototype.visitImportDeclaration = function (node) {
          var importClause = node.importClause;
          // named imports & namespace imports handled by other walker methods
          // importClause will be null for bare imports
          if (importClause != null && importClause.name != null) {
              var variableIdentifier = importClause.name;
              this.validateUsageForVariable(variableIdentifier.text, variableIdentifier.getStart());
          }
          _super.prototype.visitImportDeclaration.call(this, node);
      };
      NoUseBeforeDeclareWalker.prototype.visitImportEqualsDeclaration = function (node) {
          var name = node.name;
          this.validateUsageForVariable(name.text, name.getStart());
          _super.prototype.visitImportEqualsDeclaration.call(this, node);
      };
      NoUseBeforeDeclareWalker.prototype.visitNamedImports = function (node) {
          for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
              var namedImport = _a[_i];
              if (namedImport.propertyName != null) {
                  this.saveImportedPropertiesPositions(namedImport.propertyName.getStart());
              }
              this.validateUsageForVariable(namedImport.name.text, namedImport.name.getStart());
          }
          _super.prototype.visitNamedImports.call(this, node);
      };
      NoUseBeforeDeclareWalker.prototype.visitNamespaceImport = function (node) {
          this.validateUsageForVariable(node.name.text, node.name.getStart());
          _super.prototype.visitNamespaceImport.call(this, node);
      };
      NoUseBeforeDeclareWalker.prototype.visitVariableDeclaration = function (node) {
          var isSingleVariable = node.name.kind === ts.SyntaxKind.Identifier;
          var variableName = node.name.text;
          var currentScope = this.getCurrentScope();
          // only validate on the first variable declaration within the current scope
          if (isSingleVariable && !currentScope.has(variableName)) {
              this.validateUsageForVariable(variableName, node.getStart());
          }
          currentScope.add(variableName);
          _super.prototype.visitVariableDeclaration.call(this, node);
      };
      NoUseBeforeDeclareWalker.prototype.validateUsageForVariable = function (name, position) {
          var fileName = this.getSourceFile().fileName;
          var highlights = this.languageService.getDocumentHighlights(fileName, position, [fileName]);
          if (highlights != null) {
              for (var _i = 0, highlights_1 = highlights; _i < highlights_1.length; _i++) {
                  var highlight = highlights_1[_i];
                  for (var _a = 0, _b = highlight.highlightSpans; _a < _b.length; _a++) {
                      var highlightSpan = _b[_a];
                      var referencePosition = highlightSpan.textSpan.start;
                      if (referencePosition < position && !this.isImportedPropertyName(referencePosition)) {
                          var failureString = Rule.FAILURE_STRING_PREFIX + name + Rule.FAILURE_STRING_POSTFIX;
                          this.addFailureAt(referencePosition, name.length, failureString);
                      }
                  }
              }
          }
      };
      NoUseBeforeDeclareWalker.prototype.saveImportedPropertiesPositions = function (position) {
          this.importedPropertiesPositions.push(position);
      };
      NoUseBeforeDeclareWalker.prototype.isImportedPropertyName = function (position) {
          return this.importedPropertiesPositions.indexOf(position) !== -1;
      };
      return NoUseBeforeDeclareWalker;
  }(Lint.ScopeAwareRuleWalker));
  var _a;
  