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6 | "use strict";
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7 |
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8 | const astUtils = require("../ast-utils");
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9 |
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12 |
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13 |
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14 | module.exports = {
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15 | meta: {
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16 | docs: {
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17 | description: "disallow reassigning exceptions in `catch` clauses",
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18 | category: "Possible Errors",
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19 | recommended: true,
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20 | url: "https://eslint.org/docs/rules/no-ex-assign"
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21 | },
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22 |
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23 | schema: [],
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24 |
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25 | messages: {
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26 | unexpected: "Do not assign to the exception parameter."
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27 | }
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28 | },
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29 |
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30 | create(context) {
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31 |
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32 | |
33 |
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34 |
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35 |
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36 |
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37 | function checkVariable(variable) {
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38 | astUtils.getModifyingReferences(variable.references).forEach(reference => {
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39 | context.report({ node: reference.identifier, messageId: "unexpected" });
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40 | });
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41 | }
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42 |
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43 | return {
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44 | CatchClause(node) {
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45 | context.getDeclaredVariables(node).forEach(checkVariable);
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46 | }
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47 | };
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48 |
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49 | }
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50 | };
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