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   1 /**
   2  * @fileoverview Rule to flag when re-assigning native objects
   3  * @author Ilya Volodin
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Rule Definition
  10 //------------------------------------------------------------------------------
  11
  12 module.exports = function(context) {
  13
  14     var nativeObjects = ["Array", "Boolean", "Date", "decodeURI",
  15                         "decodeURIComponent", "encodeURI", "encodeURIComponent",
  16                         "Error", "eval", "EvalError", "Function", "isFinite",
  17                         "isNaN", "JSON", "Math", "Number", "Object", "parseInt",
  18                         "parseFloat", "RangeError", "ReferenceError", "RegExp",
  19                         "String", "SyntaxError", "TypeError", "URIError",
  20                         "Map", "NaN", "Set", "WeakMap", "Infinity", "undefined"];
  21
  22     return {
  23
  24         "AssignmentExpression": function(node) {
  25             if (nativeObjects.indexOf(node.left.name) >= 0) {
  26                 context.report(node, node.left.name + " is a read-only native object.");
  27             }
  28         },
  29
  30         "VariableDeclarator": function(node) {
  31             if (nativeObjects.indexOf(node.id.name) >= 0) {
  32                 context.report(node, "Redefinition of '{{nativeObject}}'.", { nativeObject: node.id.name });
  33             }
  34         }
  35     };
  36
  37 };