1 | 'use strict';
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2 |
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3 | Object.defineProperty(exports, '__esModule', { value: true });
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4 |
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5 | var acorn = require('acorn');
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6 | var jsx = require('acorn-jsx');
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7 | var visitorKeys = require('eslint-visitor-keys');
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8 |
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9 | function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
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10 |
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11 | function _interopNamespace(e) {
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12 | if (e && e.__esModule) return e;
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13 | var n = Object.create(null);
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14 | if (e) {
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15 | Object.keys(e).forEach(function (k) {
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16 | if (k !== 'default') {
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17 | var d = Object.getOwnPropertyDescriptor(e, k);
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18 | Object.defineProperty(n, k, d.get ? d : {
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19 | enumerable: true,
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20 | get: function () { return e[k]; }
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21 | });
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22 | }
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23 | });
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24 | }
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25 | n["default"] = e;
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26 | return Object.freeze(n);
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27 | }
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28 |
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29 | var acorn__namespace = /*#__PURE__*/_interopNamespace(acorn);
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30 | var jsx__default = /*#__PURE__*/_interopDefaultLegacy(jsx);
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31 | var visitorKeys__namespace = /*#__PURE__*/_interopNamespace(visitorKeys);
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32 |
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33 | /**
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34 | * @fileoverview Translates tokens between Acorn format and Esprima format.
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35 | * @author Nicholas C. Zakas
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36 | */
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37 |
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38 | //------------------------------------------------------------------------------
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39 | // Requirements
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40 | //------------------------------------------------------------------------------
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41 |
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42 | // none!
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43 |
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44 | //------------------------------------------------------------------------------
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45 | // Private
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46 | //------------------------------------------------------------------------------
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47 |
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48 |
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49 | // Esprima Token Types
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50 | const Token = {
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51 | Boolean: "Boolean",
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52 | EOF: "<end>",
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53 | Identifier: "Identifier",
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54 | PrivateIdentifier: "PrivateIdentifier",
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55 | Keyword: "Keyword",
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56 | Null: "Null",
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57 | Numeric: "Numeric",
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58 | Punctuator: "Punctuator",
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59 | String: "String",
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60 | RegularExpression: "RegularExpression",
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61 | Template: "Template",
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62 | JSXIdentifier: "JSXIdentifier",
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63 | JSXText: "JSXText"
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64 | };
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65 |
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66 | /**
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67 | * Converts part of a template into an Esprima token.
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68 | * @param {AcornToken[]} tokens The Acorn tokens representing the template.
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69 | * @param {string} code The source code.
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70 | * @returns {EsprimaToken} The Esprima equivalent of the template token.
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71 | * @private
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72 | */
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73 | function convertTemplatePart(tokens, code) {
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74 | const firstToken = tokens[0],
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75 | lastTemplateToken = tokens[tokens.length - 1];
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76 |
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77 | const token = {
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78 | type: Token.Template,
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79 | value: code.slice(firstToken.start, lastTemplateToken.end)
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80 | };
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81 |
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82 | if (firstToken.loc) {
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83 | token.loc = {
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84 | start: firstToken.loc.start,
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85 | end: lastTemplateToken.loc.end
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86 | };
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87 | }
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88 |
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89 | if (firstToken.range) {
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90 | token.start = firstToken.range[0];
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91 | token.end = lastTemplateToken.range[1];
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92 | token.range = [token.start, token.end];
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93 | }
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94 |
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95 | return token;
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96 | }
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97 |
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98 | /**
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99 | * Contains logic to translate Acorn tokens into Esprima tokens.
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100 | * @param {Object} acornTokTypes The Acorn token types.
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101 | * @param {string} code The source code Acorn is parsing. This is necessary
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102 | * to correct the "value" property of some tokens.
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103 | * @constructor
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104 | */
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105 | function TokenTranslator(acornTokTypes, code) {
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106 |
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107 | // token types
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108 | this._acornTokTypes = acornTokTypes;
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109 |
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110 | // token buffer for templates
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111 | this._tokens = [];
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112 |
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113 | // track the last curly brace
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114 | this._curlyBrace = null;
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115 |
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116 | // the source code
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117 | this._code = code;
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118 |
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119 | }
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120 |
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121 | TokenTranslator.prototype = {
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122 | constructor: TokenTranslator,
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123 |
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124 | /**
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125 | * Translates a single Esprima token to a single Acorn token. This may be
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126 | * inaccurate due to how templates are handled differently in Esprima and
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127 | * Acorn, but should be accurate for all other tokens.
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128 | * @param {AcornToken} token The Acorn token to translate.
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129 | * @param {Object} extra Espree extra object.
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130 | * @returns {EsprimaToken} The Esprima version of the token.
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131 | */
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132 | translate(token, extra) {
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133 |
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134 | const type = token.type,
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135 | tt = this._acornTokTypes;
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136 |
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137 | if (type === tt.name) {
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138 | token.type = Token.Identifier;
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139 |
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140 | // TODO: See if this is an Acorn bug
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141 | if (token.value === "static") {
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142 | token.type = Token.Keyword;
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143 | }
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144 |
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145 | if (extra.ecmaVersion > 5 && (token.value === "yield" || token.value === "let")) {
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146 | token.type = Token.Keyword;
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147 | }
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148 |
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149 | } else if (type === tt.privateId) {
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150 | token.type = Token.PrivateIdentifier;
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151 |
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152 | } else if (type === tt.semi || type === tt.comma ||
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153 | type === tt.parenL || type === tt.parenR ||
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154 | type === tt.braceL || type === tt.braceR ||
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155 | type === tt.dot || type === tt.bracketL ||
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156 | type === tt.colon || type === tt.question ||
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157 | type === tt.bracketR || type === tt.ellipsis ||
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158 | type === tt.arrow || type === tt.jsxTagStart ||
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159 | type === tt.incDec || type === tt.starstar ||
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160 | type === tt.jsxTagEnd || type === tt.prefix ||
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161 | type === tt.questionDot ||
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162 | (type.binop && !type.keyword) ||
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163 | type.isAssign) {
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164 |
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165 | token.type = Token.Punctuator;
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166 | token.value = this._code.slice(token.start, token.end);
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167 | } else if (type === tt.jsxName) {
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168 | token.type = Token.JSXIdentifier;
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169 | } else if (type.label === "jsxText" || type === tt.jsxAttrValueToken) {
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170 | token.type = Token.JSXText;
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171 | } else if (type.keyword) {
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172 | if (type.keyword === "true" || type.keyword === "false") {
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173 | token.type = Token.Boolean;
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174 | } else if (type.keyword === "null") {
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175 | token.type = Token.Null;
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176 | } else {
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177 | token.type = Token.Keyword;
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178 | }
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179 | } else if (type === tt.num) {
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180 | token.type = Token.Numeric;
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181 | token.value = this._code.slice(token.start, token.end);
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182 | } else if (type === tt.string) {
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183 |
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184 | if (extra.jsxAttrValueToken) {
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185 | extra.jsxAttrValueToken = false;
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186 | token.type = Token.JSXText;
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187 | } else {
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188 | token.type = Token.String;
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189 | }
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190 |
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191 | token.value = this._code.slice(token.start, token.end);
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192 | } else if (type === tt.regexp) {
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193 | token.type = Token.RegularExpression;
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194 | const value = token.value;
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195 |
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196 | token.regex = {
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197 | flags: value.flags,
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198 | pattern: value.pattern
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199 | };
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200 | token.value = `/${value.pattern}/${value.flags}`;
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201 | }
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202 |
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203 | return token;
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204 | },
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205 |
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206 | /**
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207 | * Function to call during Acorn's onToken handler.
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208 | * @param {AcornToken} token The Acorn token.
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209 | * @param {Object} extra The Espree extra object.
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210 | * @returns {void}
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211 | */
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212 | onToken(token, extra) {
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213 |
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214 | const tt = this._acornTokTypes,
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215 | tokens = extra.tokens,
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216 | templateTokens = this._tokens;
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217 |
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218 | /**
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219 | * Flushes the buffered template tokens and resets the template
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220 | * tracking.
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221 | * @returns {void}
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222 | * @private
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223 | */
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224 | const translateTemplateTokens = () => {
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225 | tokens.push(convertTemplatePart(this._tokens, this._code));
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226 | this._tokens = [];
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227 | };
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228 |
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229 | if (token.type === tt.eof) {
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230 |
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231 | // might be one last curlyBrace
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232 | if (this._curlyBrace) {
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233 | tokens.push(this.translate(this._curlyBrace, extra));
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234 | }
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235 |
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236 | return;
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237 | }
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238 |
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239 | if (token.type === tt.backQuote) {
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240 |
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241 | // if there's already a curly, it's not part of the template
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242 | if (this._curlyBrace) {
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243 | tokens.push(this.translate(this._curlyBrace, extra));
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244 | this._curlyBrace = null;
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245 | }
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246 |
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247 | templateTokens.push(token);
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248 |
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249 | // it's the end
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250 | if (templateTokens.length > 1) {
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251 | translateTemplateTokens();
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252 | }
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253 |
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254 | return;
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255 | }
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256 | if (token.type === tt.dollarBraceL) {
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257 | templateTokens.push(token);
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258 | translateTemplateTokens();
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259 | return;
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260 | }
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261 | if (token.type === tt.braceR) {
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262 |
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263 | // if there's already a curly, it's not part of the template
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264 | if (this._curlyBrace) {
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265 | tokens.push(this.translate(this._curlyBrace, extra));
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266 | }
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267 |
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268 | // store new curly for later
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269 | this._curlyBrace = token;
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270 | return;
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271 | }
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272 | if (token.type === tt.template || token.type === tt.invalidTemplate) {
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273 | if (this._curlyBrace) {
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274 | templateTokens.push(this._curlyBrace);
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275 | this._curlyBrace = null;
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276 | }
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277 |
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278 | templateTokens.push(token);
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279 | return;
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280 | }
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281 |
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282 | if (this._curlyBrace) {
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283 | tokens.push(this.translate(this._curlyBrace, extra));
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284 | this._curlyBrace = null;
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285 | }
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286 |
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287 | tokens.push(this.translate(token, extra));
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288 | }
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289 | };
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290 |
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291 | /**
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292 | * @fileoverview A collection of methods for processing Espree's options.
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293 | * @author Kai Cataldo
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294 | */
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295 |
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296 | //------------------------------------------------------------------------------
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297 | // Helpers
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298 | //------------------------------------------------------------------------------
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299 |
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300 | const SUPPORTED_VERSIONS = [
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301 | 3,
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302 | 5,
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303 | 6, // 2015
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304 | 7, // 2016
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305 | 8, // 2017
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306 | 9, // 2018
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307 | 10, // 2019
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308 | 11, // 2020
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309 | 12, // 2021
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310 | 13, // 2022
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311 | 14, // 2023
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312 | 15 // 2024
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313 | ];
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314 |
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315 | /**
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316 | * Get the latest ECMAScript version supported by Espree.
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317 | * @returns {number} The latest ECMAScript version.
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318 | */
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319 | function getLatestEcmaVersion() {
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320 | return SUPPORTED_VERSIONS[SUPPORTED_VERSIONS.length - 1];
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321 | }
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322 |
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323 | /**
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324 | * Get the list of ECMAScript versions supported by Espree.
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325 | * @returns {number[]} An array containing the supported ECMAScript versions.
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326 | */
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327 | function getSupportedEcmaVersions() {
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328 | return [...SUPPORTED_VERSIONS];
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329 | }
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330 |
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331 | /**
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332 | * Normalize ECMAScript version from the initial config
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333 | * @param {(number|"latest")} ecmaVersion ECMAScript version from the initial config
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334 | * @throws {Error} throws an error if the ecmaVersion is invalid.
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335 | * @returns {number} normalized ECMAScript version
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336 | */
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337 | function normalizeEcmaVersion(ecmaVersion = 5) {
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338 |
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339 | let version = ecmaVersion === "latest" ? getLatestEcmaVersion() : ecmaVersion;
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340 |
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341 | if (typeof version !== "number") {
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342 | throw new Error(`ecmaVersion must be a number or "latest". Received value of type ${typeof ecmaVersion} instead.`);
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343 | }
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344 |
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345 | // Calculate ECMAScript edition number from official year version starting with
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346 | // ES2015, which corresponds with ES6 (or a difference of 2009).
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347 | if (version >= 2015) {
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348 | version -= 2009;
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349 | }
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350 |
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351 | if (!SUPPORTED_VERSIONS.includes(version)) {
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352 | throw new Error("Invalid ecmaVersion.");
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353 | }
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354 |
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355 | return version;
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356 | }
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357 |
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358 | /**
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359 | * Normalize sourceType from the initial config
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360 | * @param {string} sourceType to normalize
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361 | * @throws {Error} throw an error if sourceType is invalid
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362 | * @returns {string} normalized sourceType
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363 | */
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364 | function normalizeSourceType(sourceType = "script") {
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365 | if (sourceType === "script" || sourceType === "module") {
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366 | return sourceType;
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367 | }
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368 |
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369 | if (sourceType === "commonjs") {
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370 | return "script";
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371 | }
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372 |
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373 | throw new Error("Invalid sourceType.");
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374 | }
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375 |
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376 | /**
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377 | * Normalize parserOptions
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378 | * @param {Object} options the parser options to normalize
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379 | * @throws {Error} throw an error if found invalid option.
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380 | * @returns {Object} normalized options
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381 | */
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382 | function normalizeOptions(options) {
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383 | const ecmaVersion = normalizeEcmaVersion(options.ecmaVersion);
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384 | const sourceType = normalizeSourceType(options.sourceType);
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385 | const ranges = options.range === true;
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386 | const locations = options.loc === true;
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387 |
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388 | if (ecmaVersion !== 3 && options.allowReserved) {
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389 |
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390 | // a value of `false` is intentionally allowed here, so a shared config can overwrite it when needed
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391 | throw new Error("`allowReserved` is only supported when ecmaVersion is 3");
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392 | }
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393 | if (typeof options.allowReserved !== "undefined" && typeof options.allowReserved !== "boolean") {
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394 | throw new Error("`allowReserved`, when present, must be `true` or `false`");
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395 | }
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396 | const allowReserved = ecmaVersion === 3 ? (options.allowReserved || "never") : false;
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397 | const ecmaFeatures = options.ecmaFeatures || {};
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398 | const allowReturnOutsideFunction = options.sourceType === "commonjs" ||
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399 | Boolean(ecmaFeatures.globalReturn);
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400 |
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401 | if (sourceType === "module" && ecmaVersion < 6) {
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402 | throw new Error("sourceType 'module' is not supported when ecmaVersion < 2015. Consider adding `{ ecmaVersion: 2015 }` to the parser options.");
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403 | }
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404 |
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405 | return Object.assign({}, options, {
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406 | ecmaVersion,
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407 | sourceType,
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408 | ranges,
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409 | locations,
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410 | allowReserved,
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411 | allowReturnOutsideFunction
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412 | });
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413 | }
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414 |
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415 | /* eslint no-param-reassign: 0 -- stylistic choice */
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416 |
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417 |
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418 | const STATE = Symbol("espree's internal state");
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419 | const ESPRIMA_FINISH_NODE = Symbol("espree's esprimaFinishNode");
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420 |
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421 |
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422 | /**
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423 | * Converts an Acorn comment to a Esprima comment.
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424 | * @param {boolean} block True if it's a block comment, false if not.
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425 | * @param {string} text The text of the comment.
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426 | * @param {int} start The index at which the comment starts.
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427 | * @param {int} end The index at which the comment ends.
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428 | * @param {Location} startLoc The location at which the comment starts.
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429 | * @param {Location} endLoc The location at which the comment ends.
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430 | * @param {string} code The source code being parsed.
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431 | * @returns {Object} The comment object.
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432 | * @private
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433 | */
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434 | function convertAcornCommentToEsprimaComment(block, text, start, end, startLoc, endLoc, code) {
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435 | let type;
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436 |
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437 | if (block) {
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438 | type = "Block";
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439 | } else if (code.slice(start, start + 2) === "#!") {
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440 | type = "Hashbang";
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441 | } else {
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442 | type = "Line";
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443 | }
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444 |
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445 | const comment = {
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446 | type,
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447 | value: text
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448 | };
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449 |
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450 | if (typeof start === "number") {
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451 | comment.start = start;
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452 | comment.end = end;
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453 | comment.range = [start, end];
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454 | }
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455 |
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456 | if (typeof startLoc === "object") {
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457 | comment.loc = {
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458 | start: startLoc,
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459 | end: endLoc
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460 | };
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461 | }
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462 |
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463 | return comment;
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464 | }
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465 |
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466 | var espree = () => Parser => {
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467 | const tokTypes = Object.assign({}, Parser.acorn.tokTypes);
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468 |
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469 | if (Parser.acornJsx) {
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470 | Object.assign(tokTypes, Parser.acornJsx.tokTypes);
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471 | }
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472 |
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473 | return class Espree extends Parser {
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474 | constructor(opts, code) {
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475 | if (typeof opts !== "object" || opts === null) {
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476 | opts = {};
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477 | }
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478 | if (typeof code !== "string" && !(code instanceof String)) {
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479 | code = String(code);
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480 | }
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481 |
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482 | // save original source type in case of commonjs
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483 | const originalSourceType = opts.sourceType;
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484 | const options = normalizeOptions(opts);
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485 | const ecmaFeatures = options.ecmaFeatures || {};
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---|
486 | const tokenTranslator =
|
---|
487 | options.tokens === true
|
---|
488 | ? new TokenTranslator(tokTypes, code)
|
---|
489 | : null;
|
---|
490 |
|
---|
491 | /*
|
---|
492 | * Data that is unique to Espree and is not represented internally
|
---|
493 | * in Acorn.
|
---|
494 | *
|
---|
495 | * For ES2023 hashbangs, Espree will call `onComment()` during the
|
---|
496 | * constructor, so we must define state before having access to
|
---|
497 | * `this`.
|
---|
498 | */
|
---|
499 | const state = {
|
---|
500 | originalSourceType: originalSourceType || options.sourceType,
|
---|
501 | tokens: tokenTranslator ? [] : null,
|
---|
502 | comments: options.comment === true ? [] : null,
|
---|
503 | impliedStrict: ecmaFeatures.impliedStrict === true && options.ecmaVersion >= 5,
|
---|
504 | ecmaVersion: options.ecmaVersion,
|
---|
505 | jsxAttrValueToken: false,
|
---|
506 | lastToken: null,
|
---|
507 | templateElements: []
|
---|
508 | };
|
---|
509 |
|
---|
510 | // Initialize acorn parser.
|
---|
511 | super({
|
---|
512 |
|
---|
513 | // do not use spread, because we don't want to pass any unknown options to acorn
|
---|
514 | ecmaVersion: options.ecmaVersion,
|
---|
515 | sourceType: options.sourceType,
|
---|
516 | ranges: options.ranges,
|
---|
517 | locations: options.locations,
|
---|
518 | allowReserved: options.allowReserved,
|
---|
519 |
|
---|
520 | // Truthy value is true for backward compatibility.
|
---|
521 | allowReturnOutsideFunction: options.allowReturnOutsideFunction,
|
---|
522 |
|
---|
523 | // Collect tokens
|
---|
524 | onToken(token) {
|
---|
525 | if (tokenTranslator) {
|
---|
526 |
|
---|
527 | // Use `tokens`, `ecmaVersion`, and `jsxAttrValueToken` in the state.
|
---|
528 | tokenTranslator.onToken(token, state);
|
---|
529 | }
|
---|
530 | if (token.type !== tokTypes.eof) {
|
---|
531 | state.lastToken = token;
|
---|
532 | }
|
---|
533 | },
|
---|
534 |
|
---|
535 | // Collect comments
|
---|
536 | onComment(block, text, start, end, startLoc, endLoc) {
|
---|
537 | if (state.comments) {
|
---|
538 | const comment = convertAcornCommentToEsprimaComment(block, text, start, end, startLoc, endLoc, code);
|
---|
539 |
|
---|
540 | state.comments.push(comment);
|
---|
541 | }
|
---|
542 | }
|
---|
543 | }, code);
|
---|
544 |
|
---|
545 | /*
|
---|
546 | * We put all of this data into a symbol property as a way to avoid
|
---|
547 | * potential naming conflicts with future versions of Acorn.
|
---|
548 | */
|
---|
549 | this[STATE] = state;
|
---|
550 | }
|
---|
551 |
|
---|
552 | tokenize() {
|
---|
553 | do {
|
---|
554 | this.next();
|
---|
555 | } while (this.type !== tokTypes.eof);
|
---|
556 |
|
---|
557 | // Consume the final eof token
|
---|
558 | this.next();
|
---|
559 |
|
---|
560 | const extra = this[STATE];
|
---|
561 | const tokens = extra.tokens;
|
---|
562 |
|
---|
563 | if (extra.comments) {
|
---|
564 | tokens.comments = extra.comments;
|
---|
565 | }
|
---|
566 |
|
---|
567 | return tokens;
|
---|
568 | }
|
---|
569 |
|
---|
570 | finishNode(...args) {
|
---|
571 | const result = super.finishNode(...args);
|
---|
572 |
|
---|
573 | return this[ESPRIMA_FINISH_NODE](result);
|
---|
574 | }
|
---|
575 |
|
---|
576 | finishNodeAt(...args) {
|
---|
577 | const result = super.finishNodeAt(...args);
|
---|
578 |
|
---|
579 | return this[ESPRIMA_FINISH_NODE](result);
|
---|
580 | }
|
---|
581 |
|
---|
582 | parse() {
|
---|
583 | const extra = this[STATE];
|
---|
584 | const program = super.parse();
|
---|
585 |
|
---|
586 | program.sourceType = extra.originalSourceType;
|
---|
587 |
|
---|
588 | if (extra.comments) {
|
---|
589 | program.comments = extra.comments;
|
---|
590 | }
|
---|
591 | if (extra.tokens) {
|
---|
592 | program.tokens = extra.tokens;
|
---|
593 | }
|
---|
594 |
|
---|
595 | /*
|
---|
596 | * Adjust opening and closing position of program to match Esprima.
|
---|
597 | * Acorn always starts programs at range 0 whereas Esprima starts at the
|
---|
598 | * first AST node's start (the only real difference is when there's leading
|
---|
599 | * whitespace or leading comments). Acorn also counts trailing whitespace
|
---|
600 | * as part of the program whereas Esprima only counts up to the last token.
|
---|
601 | */
|
---|
602 | if (program.body.length) {
|
---|
603 | const [firstNode] = program.body;
|
---|
604 |
|
---|
605 | if (program.range) {
|
---|
606 | program.range[0] = firstNode.range[0];
|
---|
607 | }
|
---|
608 | if (program.loc) {
|
---|
609 | program.loc.start = firstNode.loc.start;
|
---|
610 | }
|
---|
611 | program.start = firstNode.start;
|
---|
612 | }
|
---|
613 | if (extra.lastToken) {
|
---|
614 | if (program.range) {
|
---|
615 | program.range[1] = extra.lastToken.range[1];
|
---|
616 | }
|
---|
617 | if (program.loc) {
|
---|
618 | program.loc.end = extra.lastToken.loc.end;
|
---|
619 | }
|
---|
620 | program.end = extra.lastToken.end;
|
---|
621 | }
|
---|
622 |
|
---|
623 |
|
---|
624 | /*
|
---|
625 | * https://github.com/eslint/espree/issues/349
|
---|
626 | * Ensure that template elements have correct range information.
|
---|
627 | * This is one location where Acorn produces a different value
|
---|
628 | * for its start and end properties vs. the values present in the
|
---|
629 | * range property. In order to avoid confusion, we set the start
|
---|
630 | * and end properties to the values that are present in range.
|
---|
631 | * This is done here, instead of in finishNode(), because Acorn
|
---|
632 | * uses the values of start and end internally while parsing, making
|
---|
633 | * it dangerous to change those values while parsing is ongoing.
|
---|
634 | * By waiting until the end of parsing, we can safely change these
|
---|
635 | * values without affect any other part of the process.
|
---|
636 | */
|
---|
637 | this[STATE].templateElements.forEach(templateElement => {
|
---|
638 | const startOffset = -1;
|
---|
639 | const endOffset = templateElement.tail ? 1 : 2;
|
---|
640 |
|
---|
641 | templateElement.start += startOffset;
|
---|
642 | templateElement.end += endOffset;
|
---|
643 |
|
---|
644 | if (templateElement.range) {
|
---|
645 | templateElement.range[0] += startOffset;
|
---|
646 | templateElement.range[1] += endOffset;
|
---|
647 | }
|
---|
648 |
|
---|
649 | if (templateElement.loc) {
|
---|
650 | templateElement.loc.start.column += startOffset;
|
---|
651 | templateElement.loc.end.column += endOffset;
|
---|
652 | }
|
---|
653 | });
|
---|
654 |
|
---|
655 | return program;
|
---|
656 | }
|
---|
657 |
|
---|
658 | parseTopLevel(node) {
|
---|
659 | if (this[STATE].impliedStrict) {
|
---|
660 | this.strict = true;
|
---|
661 | }
|
---|
662 | return super.parseTopLevel(node);
|
---|
663 | }
|
---|
664 |
|
---|
665 | /**
|
---|
666 | * Overwrites the default raise method to throw Esprima-style errors.
|
---|
667 | * @param {int} pos The position of the error.
|
---|
668 | * @param {string} message The error message.
|
---|
669 | * @throws {SyntaxError} A syntax error.
|
---|
670 | * @returns {void}
|
---|
671 | */
|
---|
672 | raise(pos, message) {
|
---|
673 | const loc = Parser.acorn.getLineInfo(this.input, pos);
|
---|
674 | const err = new SyntaxError(message);
|
---|
675 |
|
---|
676 | err.index = pos;
|
---|
677 | err.lineNumber = loc.line;
|
---|
678 | err.column = loc.column + 1; // acorn uses 0-based columns
|
---|
679 | throw err;
|
---|
680 | }
|
---|
681 |
|
---|
682 | /**
|
---|
683 | * Overwrites the default raise method to throw Esprima-style errors.
|
---|
684 | * @param {int} pos The position of the error.
|
---|
685 | * @param {string} message The error message.
|
---|
686 | * @throws {SyntaxError} A syntax error.
|
---|
687 | * @returns {void}
|
---|
688 | */
|
---|
689 | raiseRecoverable(pos, message) {
|
---|
690 | this.raise(pos, message);
|
---|
691 | }
|
---|
692 |
|
---|
693 | /**
|
---|
694 | * Overwrites the default unexpected method to throw Esprima-style errors.
|
---|
695 | * @param {int} pos The position of the error.
|
---|
696 | * @throws {SyntaxError} A syntax error.
|
---|
697 | * @returns {void}
|
---|
698 | */
|
---|
699 | unexpected(pos) {
|
---|
700 | let message = "Unexpected token";
|
---|
701 |
|
---|
702 | if (pos !== null && pos !== void 0) {
|
---|
703 | this.pos = pos;
|
---|
704 |
|
---|
705 | if (this.options.locations) {
|
---|
706 | while (this.pos < this.lineStart) {
|
---|
707 | this.lineStart = this.input.lastIndexOf("\n", this.lineStart - 2) + 1;
|
---|
708 | --this.curLine;
|
---|
709 | }
|
---|
710 | }
|
---|
711 |
|
---|
712 | this.nextToken();
|
---|
713 | }
|
---|
714 |
|
---|
715 | if (this.end > this.start) {
|
---|
716 | message += ` ${this.input.slice(this.start, this.end)}`;
|
---|
717 | }
|
---|
718 |
|
---|
719 | this.raise(this.start, message);
|
---|
720 | }
|
---|
721 |
|
---|
722 | /*
|
---|
723 | * Esprima-FB represents JSX strings as tokens called "JSXText", but Acorn-JSX
|
---|
724 | * uses regular tt.string without any distinction between this and regular JS
|
---|
725 | * strings. As such, we intercept an attempt to read a JSX string and set a flag
|
---|
726 | * on extra so that when tokens are converted, the next token will be switched
|
---|
727 | * to JSXText via onToken.
|
---|
728 | */
|
---|
729 | jsx_readString(quote) { // eslint-disable-line camelcase -- required by API
|
---|
730 | const result = super.jsx_readString(quote);
|
---|
731 |
|
---|
732 | if (this.type === tokTypes.string) {
|
---|
733 | this[STATE].jsxAttrValueToken = true;
|
---|
734 | }
|
---|
735 | return result;
|
---|
736 | }
|
---|
737 |
|
---|
738 | /**
|
---|
739 | * Performs last-minute Esprima-specific compatibility checks and fixes.
|
---|
740 | * @param {ASTNode} result The node to check.
|
---|
741 | * @returns {ASTNode} The finished node.
|
---|
742 | */
|
---|
743 | [ESPRIMA_FINISH_NODE](result) {
|
---|
744 |
|
---|
745 | // Acorn doesn't count the opening and closing backticks as part of templates
|
---|
746 | // so we have to adjust ranges/locations appropriately.
|
---|
747 | if (result.type === "TemplateElement") {
|
---|
748 |
|
---|
749 | // save template element references to fix start/end later
|
---|
750 | this[STATE].templateElements.push(result);
|
---|
751 | }
|
---|
752 |
|
---|
753 | if (result.type.includes("Function") && !result.generator) {
|
---|
754 | result.generator = false;
|
---|
755 | }
|
---|
756 |
|
---|
757 | return result;
|
---|
758 | }
|
---|
759 | };
|
---|
760 | };
|
---|
761 |
|
---|
762 | const version$1 = "9.6.1";
|
---|
763 |
|
---|
764 | /* eslint-disable jsdoc/no-multi-asterisks -- needed to preserve original formatting of licences */
|
---|
765 |
|
---|
766 |
|
---|
767 | // To initialize lazily.
|
---|
768 | const parsers = {
|
---|
769 | _regular: null,
|
---|
770 | _jsx: null,
|
---|
771 |
|
---|
772 | get regular() {
|
---|
773 | if (this._regular === null) {
|
---|
774 | this._regular = acorn__namespace.Parser.extend(espree());
|
---|
775 | }
|
---|
776 | return this._regular;
|
---|
777 | },
|
---|
778 |
|
---|
779 | get jsx() {
|
---|
780 | if (this._jsx === null) {
|
---|
781 | this._jsx = acorn__namespace.Parser.extend(jsx__default["default"](), espree());
|
---|
782 | }
|
---|
783 | return this._jsx;
|
---|
784 | },
|
---|
785 |
|
---|
786 | get(options) {
|
---|
787 | const useJsx = Boolean(
|
---|
788 | options &&
|
---|
789 | options.ecmaFeatures &&
|
---|
790 | options.ecmaFeatures.jsx
|
---|
791 | );
|
---|
792 |
|
---|
793 | return useJsx ? this.jsx : this.regular;
|
---|
794 | }
|
---|
795 | };
|
---|
796 |
|
---|
797 | //------------------------------------------------------------------------------
|
---|
798 | // Tokenizer
|
---|
799 | //------------------------------------------------------------------------------
|
---|
800 |
|
---|
801 | /**
|
---|
802 | * Tokenizes the given code.
|
---|
803 | * @param {string} code The code to tokenize.
|
---|
804 | * @param {Object} options Options defining how to tokenize.
|
---|
805 | * @returns {Token[]} An array of tokens.
|
---|
806 | * @throws {SyntaxError} If the input code is invalid.
|
---|
807 | * @private
|
---|
808 | */
|
---|
809 | function tokenize(code, options) {
|
---|
810 | const Parser = parsers.get(options);
|
---|
811 |
|
---|
812 | // Ensure to collect tokens.
|
---|
813 | if (!options || options.tokens !== true) {
|
---|
814 | options = Object.assign({}, options, { tokens: true }); // eslint-disable-line no-param-reassign -- stylistic choice
|
---|
815 | }
|
---|
816 |
|
---|
817 | return new Parser(options, code).tokenize();
|
---|
818 | }
|
---|
819 |
|
---|
820 | //------------------------------------------------------------------------------
|
---|
821 | // Parser
|
---|
822 | //------------------------------------------------------------------------------
|
---|
823 |
|
---|
824 | /**
|
---|
825 | * Parses the given code.
|
---|
826 | * @param {string} code The code to tokenize.
|
---|
827 | * @param {Object} options Options defining how to tokenize.
|
---|
828 | * @returns {ASTNode} The "Program" AST node.
|
---|
829 | * @throws {SyntaxError} If the input code is invalid.
|
---|
830 | */
|
---|
831 | function parse(code, options) {
|
---|
832 | const Parser = parsers.get(options);
|
---|
833 |
|
---|
834 | return new Parser(options, code).parse();
|
---|
835 | }
|
---|
836 |
|
---|
837 | //------------------------------------------------------------------------------
|
---|
838 | // Public
|
---|
839 | //------------------------------------------------------------------------------
|
---|
840 |
|
---|
841 | const version = version$1;
|
---|
842 | const name = "espree";
|
---|
843 |
|
---|
844 | /* istanbul ignore next */
|
---|
845 | const VisitorKeys = (function() {
|
---|
846 | return visitorKeys__namespace.KEYS;
|
---|
847 | }());
|
---|
848 |
|
---|
849 | // Derive node types from VisitorKeys
|
---|
850 | /* istanbul ignore next */
|
---|
851 | const Syntax = (function() {
|
---|
852 | let key,
|
---|
853 | types = {};
|
---|
854 |
|
---|
855 | if (typeof Object.create === "function") {
|
---|
856 | types = Object.create(null);
|
---|
857 | }
|
---|
858 |
|
---|
859 | for (key in VisitorKeys) {
|
---|
860 | if (Object.hasOwnProperty.call(VisitorKeys, key)) {
|
---|
861 | types[key] = key;
|
---|
862 | }
|
---|
863 | }
|
---|
864 |
|
---|
865 | if (typeof Object.freeze === "function") {
|
---|
866 | Object.freeze(types);
|
---|
867 | }
|
---|
868 |
|
---|
869 | return types;
|
---|
870 | }());
|
---|
871 |
|
---|
872 | const latestEcmaVersion = getLatestEcmaVersion();
|
---|
873 |
|
---|
874 | const supportedEcmaVersions = getSupportedEcmaVersions();
|
---|
875 |
|
---|
876 | exports.Syntax = Syntax;
|
---|
877 | exports.VisitorKeys = VisitorKeys;
|
---|
878 | exports.latestEcmaVersion = latestEcmaVersion;
|
---|
879 | exports.name = name;
|
---|
880 | exports.parse = parse;
|
---|
881 | exports.supportedEcmaVersions = supportedEcmaVersions;
|
---|
882 | exports.tokenize = tokenize;
|
---|
883 | exports.version = version;
|
---|