| /** |
| * @fileoverview Disallow shadowing of NaN, undefined, and Infinity (ES5 section 15.1.1) |
| * @author Michael Ficarra |
| */ |
| "use strict"; |
| |
| //------------------------------------------------------------------------------ |
| // Rule Definition |
| //------------------------------------------------------------------------------ |
| |
| module.exports = { |
| meta: { |
| docs: { |
| description: "disallow identifiers from shadowing restricted names", |
| category: "Variables", |
| recommended: false, |
| url: "https://eslint.org/docs/rules/no-shadow-restricted-names" |
| }, |
| |
| schema: [] |
| }, |
| |
| create(context) { |
| |
| const RESTRICTED = ["undefined", "NaN", "Infinity", "arguments", "eval"]; |
| |
| /** |
| * Check if the node name is present inside the restricted list |
| * @param {ASTNode} id id to evaluate |
| * @returns {void} |
| * @private |
| */ |
| function checkForViolation(id) { |
| if (RESTRICTED.indexOf(id.name) > -1) { |
| context.report({ |
| node: id, |
| message: "Shadowing of global property '{{idName}}'.", |
| data: { |
| idName: id.name |
| } |
| }); |
| } |
| } |
| |
| return { |
| VariableDeclarator(node) { |
| checkForViolation(node.id); |
| }, |
| ArrowFunctionExpression(node) { |
| [].map.call(node.params, checkForViolation); |
| }, |
| FunctionExpression(node) { |
| if (node.id) { |
| checkForViolation(node.id); |
| } |
| [].map.call(node.params, checkForViolation); |
| }, |
| FunctionDeclaration(node) { |
| if (node.id) { |
| checkForViolation(node.id); |
| [].map.call(node.params, checkForViolation); |
| } |
| }, |
| CatchClause(node) { |
| checkForViolation(node.param); |
| } |
| }; |
| |
| } |
| }; |