1 | /**
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2 | * @fileoverview Enforce spacing between rest and spread operators and their expressions.
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3 | * @author Kai Cataldo
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4 | * @deprecated in ESLint v8.53.0
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5 | */
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6 |
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7 | "use strict";
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8 |
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9 | //------------------------------------------------------------------------------
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10 | // Rule Definition
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11 | //------------------------------------------------------------------------------
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12 |
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13 | /** @type {import('../shared/types').Rule} */
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14 | module.exports = {
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15 | meta: {
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16 | deprecated: true,
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17 | replacedBy: [],
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18 | type: "layout",
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19 |
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20 | docs: {
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21 | description: "Enforce spacing between rest and spread operators and their expressions",
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22 | recommended: false,
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23 | url: "https://eslint.org/docs/latest/rules/rest-spread-spacing"
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24 | },
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25 |
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26 | fixable: "whitespace",
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27 |
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28 | schema: [
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29 | {
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30 | enum: ["always", "never"]
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31 | }
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32 | ],
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33 |
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34 | messages: {
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35 | unexpectedWhitespace: "Unexpected whitespace after {{type}} operator.",
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36 | expectedWhitespace: "Expected whitespace after {{type}} operator."
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37 | }
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38 | },
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39 |
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40 | create(context) {
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41 | const sourceCode = context.sourceCode,
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42 | alwaysSpace = context.options[0] === "always";
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43 |
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44 | //--------------------------------------------------------------------------
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45 | // Helpers
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46 | //--------------------------------------------------------------------------
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47 |
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48 | /**
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49 | * Checks whitespace between rest/spread operators and their expressions
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50 | * @param {ASTNode} node The node to check
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51 | * @returns {void}
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52 | */
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53 | function checkWhiteSpace(node) {
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54 | const operator = sourceCode.getFirstToken(node),
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55 | nextToken = sourceCode.getTokenAfter(operator),
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56 | hasWhitespace = sourceCode.isSpaceBetweenTokens(operator, nextToken);
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57 | let type;
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58 |
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59 | switch (node.type) {
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60 | case "SpreadElement":
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61 | type = "spread";
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62 | if (node.parent.type === "ObjectExpression") {
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63 | type += " property";
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64 | }
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65 | break;
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66 | case "RestElement":
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67 | type = "rest";
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68 | if (node.parent.type === "ObjectPattern") {
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69 | type += " property";
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70 | }
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71 | break;
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72 | case "ExperimentalSpreadProperty":
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73 | type = "spread property";
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74 | break;
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75 | case "ExperimentalRestProperty":
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76 | type = "rest property";
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77 | break;
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78 | default:
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79 | return;
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80 | }
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81 |
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82 | if (alwaysSpace && !hasWhitespace) {
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83 | context.report({
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84 | node,
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85 | loc: operator.loc,
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86 | messageId: "expectedWhitespace",
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87 | data: {
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88 | type
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89 | },
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90 | fix(fixer) {
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91 | return fixer.replaceTextRange([operator.range[1], nextToken.range[0]], " ");
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92 | }
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93 | });
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94 | } else if (!alwaysSpace && hasWhitespace) {
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95 | context.report({
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96 | node,
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97 | loc: {
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98 | start: operator.loc.end,
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99 | end: nextToken.loc.start
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100 | },
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101 | messageId: "unexpectedWhitespace",
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102 | data: {
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103 | type
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104 | },
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105 | fix(fixer) {
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106 | return fixer.removeRange([operator.range[1], nextToken.range[0]]);
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107 | }
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108 | });
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109 | }
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110 | }
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111 |
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112 | //--------------------------------------------------------------------------
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113 | // Public
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114 | //--------------------------------------------------------------------------
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115 |
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116 | return {
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117 | SpreadElement: checkWhiteSpace,
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118 | RestElement: checkWhiteSpace,
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119 | ExperimentalSpreadProperty: checkWhiteSpace,
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120 | ExperimentalRestProperty: checkWhiteSpace
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121 | };
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122 | }
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123 | };
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