1 | /**
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2 | * @fileoverview Rule to flag assignment of the exception parameter
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3 | * @author Stephen Murray <spmurrayzzz>
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4 | */
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5 |
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6 | ;
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7 |
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8 | var astUtils = require("../ast-utils");
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9 |
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10 | //------------------------------------------------------------------------------
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11 | // Rule Definition
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12 | //------------------------------------------------------------------------------
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13 |
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14 | module.exports = function(context) {
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15 |
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16 | /**
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17 | * Finds and reports references that are non initializer and writable.
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18 | * @param {Variable} variable - A variable to check.
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19 | * @returns {void}
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20 | */
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21 | function checkVariable(variable) {
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22 | astUtils.getModifyingReferences(variable.references).forEach(function(reference) {
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23 | context.report(
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24 | reference.identifier,
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25 | "Do not assign to the exception parameter.");
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26 | });
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27 | }
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28 |
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29 | return {
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30 | "CatchClause": function(node) {
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31 | context.getDeclaredVariables(node).forEach(checkVariable);
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32 | }
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33 | };
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34 |
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35 | };
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36 |
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37 | module.exports.schema = [];
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