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9 |
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10 | module.exports = function(context) {
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11 |
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12 | "use strict";
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13 |
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14 |
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15 | function getRegExp(node) {
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16 |
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17 | if (node.value instanceof RegExp) {
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18 | return node.value;
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19 | } else if (typeof node.value === "string") {
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20 |
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21 | var parent = context.getAncestors().pop();
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22 | if ((parent.type === "NewExpression" || parent.type === "CallExpression") &&
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23 | parent.callee.type === "Identifier" && parent.callee.name === "RegExp") {
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24 |
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25 |
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26 | try {
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27 | return new RegExp(node.value);
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28 | } catch (ex) {
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29 | return null;
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30 | }
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31 |
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32 | }
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33 | } else {
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34 | return null;
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35 | }
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36 |
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37 | }
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38 |
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39 |
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40 |
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41 | return {
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42 |
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43 | "Literal": function(node) {
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44 |
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45 | var computedValue,
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46 | regex = getRegExp(node);
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47 |
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48 | if (regex) {
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49 | computedValue = regex.toString();
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50 | if (/[\x00-\x1f]/.test(computedValue)) {
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51 | context.report(node, "Unexpected control character in regular expression.");
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52 | }
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53 | }
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54 | }
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55 | };
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56 |
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57 | };
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