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57 lines
1.7 KiB
57 lines
1.7 KiB
/**
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* @fileoverview Rule to flag labels that are the same as an identifier
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* @author Ian Christian Myers
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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var astUtils = require("../ast-utils");
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = function(context) {
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//--------------------------------------------------------------------------
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// Helpers
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//--------------------------------------------------------------------------
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/**
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* Check if the identifier is present inside current scope
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* @param {object} scope current scope
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* @param {string} name To evaluate
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* @returns {boolean} True if its present
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* @private
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*/
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function findIdentifier(scope, name) {
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return astUtils.getVariableByName(scope, name) !== null;
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}
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//--------------------------------------------------------------------------
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// Public API
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//--------------------------------------------------------------------------
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return {
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"LabeledStatement": function(node) {
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// Fetch the innermost scope.
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var scope = context.getScope();
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// Recursively find the identifier walking up the scope, starting
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// with the innermost scope.
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if (findIdentifier(scope, node.label.name)) {
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context.report(node, "Found identifier with same name as label.");
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}
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}
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};
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};
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module.exports.schema = [];
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