1 | 'use strict';
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2 | const getDocumentationUrl = require('./utils/get-documentation-url');
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3 |
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4 | const messageId = 'throw-new-error';
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5 | const customError = /^(?:[A-Z][\da-z]*)*Error$/;
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6 |
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7 | const selector = [
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8 | 'ThrowStatement',
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9 | '>',
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10 | 'CallExpression.argument',
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11 | `:matches(${
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12 | [
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13 | // `throw FooError()`
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14 | [
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15 | '[callee.type="Identifier"]',
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16 | `[callee.name=/${customError.source}/]`
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17 | ],
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18 | // `throw lib.FooError()`
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19 | [
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20 | '[callee.type="MemberExpression"]',
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21 | '[callee.computed=false]',
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22 | '[callee.property.type="Identifier"]',
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23 | `[callee.property.name=/${customError.source}/]`
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24 | ]
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25 | ].map(selector => selector.join('')).join(', ')
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26 | })`
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27 | ].join('');
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28 |
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29 | const create = context => ({
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30 | [selector]: node => {
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31 | context.report({
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32 | node,
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33 | messageId,
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34 | fix: fixer => fixer.insertTextBefore(node, 'new ')
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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 | module.exports = {
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40 | create,
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41 | meta: {
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42 | type: 'suggestion',
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43 | docs: {
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44 | url: getDocumentationUrl(__filename)
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45 | },
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46 | messages: {
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47 | [messageId]: 'Use `new` when throwing an error.'
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48 | },
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49 | fixable: 'code'
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50 | }
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51 | };
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