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   1 /**
   2  * @fileoverview Rule to flag when deleting variables
   3  * @author Ilya Volodin
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Rule Definition
  10 //------------------------------------------------------------------------------
  11
  12 module.exports = function(context) {
  13
  14     return {
  15
  16         "UnaryExpression": function(node) {
  17             if (node.operator === "delete" && node.argument.type === "Identifier") {
  18                 context.report(node, "Variables should not be deleted.");
  19             }
  20         }
  21     };
  22
  23 };