noDuplicateVariableRule.js 3.0 KB

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  1. "use strict";
  2. var __extends = (this && this.__extends) || function (d, b) {
  3. for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
  4. function __() { this.constructor = d; }
  5. d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  6. };
  7. var ts = require("typescript");
  8. var Lint = require("../lint");
  9. var Rule = (function (_super) {
  10. __extends(Rule, _super);
  11. function Rule() {
  12. _super.apply(this, arguments);
  13. }
  14. Rule.prototype.apply = function (sourceFile) {
  15. return this.applyWithWalker(new NoDuplicateVariableWalker(sourceFile, this.getOptions()));
  16. };
  17. Rule.FAILURE_STRING = "duplicate variable: '";
  18. return Rule;
  19. }(Lint.Rules.AbstractRule));
  20. exports.Rule = Rule;
  21. var NoDuplicateVariableWalker = (function (_super) {
  22. __extends(NoDuplicateVariableWalker, _super);
  23. function NoDuplicateVariableWalker() {
  24. _super.apply(this, arguments);
  25. }
  26. NoDuplicateVariableWalker.prototype.createScope = function () {
  27. return null;
  28. };
  29. NoDuplicateVariableWalker.prototype.createBlockScope = function () {
  30. return new ScopeInfo();
  31. };
  32. NoDuplicateVariableWalker.prototype.visitBindingElement = function (node) {
  33. var isSingleVariable = node.name.kind === ts.SyntaxKind.Identifier;
  34. var isBlockScoped = Lint.isBlockScopedBindingElement(node);
  35. if (isSingleVariable && !isBlockScoped) {
  36. this.handleSingleVariableIdentifier(node.name);
  37. }
  38. _super.prototype.visitBindingElement.call(this, node);
  39. };
  40. NoDuplicateVariableWalker.prototype.visitCatchClause = function (node) {
  41. this.visitBlock(node.block);
  42. };
  43. NoDuplicateVariableWalker.prototype.visitMethodSignature = function (node) {
  44. };
  45. NoDuplicateVariableWalker.prototype.visitTypeLiteral = function (node) {
  46. };
  47. NoDuplicateVariableWalker.prototype.visitVariableDeclaration = function (node) {
  48. var isSingleVariable = node.name.kind === ts.SyntaxKind.Identifier;
  49. if (isSingleVariable && !Lint.isBlockScopedVariable(node)) {
  50. this.handleSingleVariableIdentifier(node.name);
  51. }
  52. _super.prototype.visitVariableDeclaration.call(this, node);
  53. };
  54. NoDuplicateVariableWalker.prototype.handleSingleVariableIdentifier = function (variableIdentifier) {
  55. var variableName = variableIdentifier.text;
  56. var currentBlockScope = this.getCurrentBlockScope();
  57. if (currentBlockScope.varNames.indexOf(variableName) >= 0) {
  58. this.addFailureOnIdentifier(variableIdentifier);
  59. }
  60. else {
  61. currentBlockScope.varNames.push(variableName);
  62. }
  63. };
  64. NoDuplicateVariableWalker.prototype.addFailureOnIdentifier = function (ident) {
  65. var failureString = "" + Rule.FAILURE_STRING + ident.text + "'";
  66. this.addFailure(this.createFailure(ident.getStart(), ident.getWidth(), failureString));
  67. };
  68. return NoDuplicateVariableWalker;
  69. }(Lint.BlockScopeAwareRuleWalker));
  70. var ScopeInfo = (function () {
  71. function ScopeInfo() {
  72. this.varNames = [];
  73. }
  74. return ScopeInfo;
  75. }());