1 | "use strict";
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.matchesPattern = matchesPattern;
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7 | exports.has = has;
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8 | exports.isStatic = isStatic;
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9 | exports.isnt = isnt;
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10 | exports.equals = equals;
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11 | exports.isNodeType = isNodeType;
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12 | exports.canHaveVariableDeclarationOrExpression = canHaveVariableDeclarationOrExpression;
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13 | exports.canSwapBetweenExpressionAndStatement = canSwapBetweenExpressionAndStatement;
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14 | exports.isCompletionRecord = isCompletionRecord;
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15 | exports.isStatementOrBlock = isStatementOrBlock;
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16 | exports.referencesImport = referencesImport;
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17 | exports.getSource = getSource;
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18 | exports.willIMaybeExecuteBefore = willIMaybeExecuteBefore;
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19 | exports._guessExecutionStatusRelativeTo = _guessExecutionStatusRelativeTo;
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20 | exports._guessExecutionStatusRelativeToDifferentFunctions = _guessExecutionStatusRelativeToDifferentFunctions;
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21 | exports.resolve = resolve;
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22 | exports._resolve = _resolve;
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23 | exports.isConstantExpression = isConstantExpression;
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24 | exports.isInStrictMode = isInStrictMode;
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25 | exports.is = void 0;
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26 |
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27 | var t = _interopRequireWildcard(require("@babel/types"));
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28 |
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29 | function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
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30 |
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31 | function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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32 |
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33 | function matchesPattern(pattern, allowPartial) {
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34 | return t.matchesPattern(this.node, pattern, allowPartial);
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35 | }
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36 |
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37 | function has(key) {
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38 | const val = this.node && this.node[key];
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39 |
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40 | if (val && Array.isArray(val)) {
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41 | return !!val.length;
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42 | } else {
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43 | return !!val;
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44 | }
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45 | }
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46 |
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47 | function isStatic() {
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48 | return this.scope.isStatic(this.node);
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49 | }
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50 |
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51 | const is = has;
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52 | exports.is = is;
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53 |
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54 | function isnt(key) {
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55 | return !this.has(key);
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56 | }
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57 |
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58 | function equals(key, value) {
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59 | return this.node[key] === value;
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60 | }
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61 |
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62 | function isNodeType(type) {
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63 | return t.isType(this.type, type);
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64 | }
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65 |
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66 | function canHaveVariableDeclarationOrExpression() {
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67 | return (this.key === "init" || this.key === "left") && this.parentPath.isFor();
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68 | }
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69 |
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70 | function canSwapBetweenExpressionAndStatement(replacement) {
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71 | if (this.key !== "body" || !this.parentPath.isArrowFunctionExpression()) {
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72 | return false;
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73 | }
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74 |
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75 | if (this.isExpression()) {
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76 | return t.isBlockStatement(replacement);
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77 | } else if (this.isBlockStatement()) {
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78 | return t.isExpression(replacement);
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79 | }
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80 |
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81 | return false;
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82 | }
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83 |
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84 | function isCompletionRecord(allowInsideFunction) {
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85 | let path = this;
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86 | let first = true;
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87 |
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88 | do {
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89 | const container = path.container;
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90 |
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91 | if (path.isFunction() && !first) {
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92 | return !!allowInsideFunction;
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93 | }
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94 |
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95 | first = false;
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96 |
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97 | if (Array.isArray(container) && path.key !== container.length - 1) {
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98 | return false;
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99 | }
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100 | } while ((path = path.parentPath) && !path.isProgram());
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101 |
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102 | return true;
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103 | }
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104 |
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105 | function isStatementOrBlock() {
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106 | if (this.parentPath.isLabeledStatement() || t.isBlockStatement(this.container)) {
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107 | return false;
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108 | } else {
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109 | return t.STATEMENT_OR_BLOCK_KEYS.includes(this.key);
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110 | }
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111 | }
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112 |
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113 | function referencesImport(moduleSource, importName) {
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114 | if (!this.isReferencedIdentifier()) return false;
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115 | const binding = this.scope.getBinding(this.node.name);
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116 | if (!binding || binding.kind !== "module") return false;
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117 | const path = binding.path;
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118 | const parent = path.parentPath;
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119 | if (!parent.isImportDeclaration()) return false;
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120 |
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121 | if (parent.node.source.value === moduleSource) {
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122 | if (!importName) return true;
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123 | } else {
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124 | return false;
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125 | }
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126 |
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127 | if (path.isImportDefaultSpecifier() && importName === "default") {
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128 | return true;
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129 | }
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130 |
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131 | if (path.isImportNamespaceSpecifier() && importName === "*") {
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132 | return true;
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133 | }
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134 |
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135 | if (path.isImportSpecifier() && path.node.imported.name === importName) {
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136 | return true;
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137 | }
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138 |
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139 | return false;
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140 | }
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141 |
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142 | function getSource() {
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143 | const node = this.node;
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144 |
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145 | if (node.end) {
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146 | const code = this.hub.getCode();
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147 | if (code) return code.slice(node.start, node.end);
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148 | }
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149 |
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150 | return "";
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151 | }
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152 |
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153 | function willIMaybeExecuteBefore(target) {
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154 | return this._guessExecutionStatusRelativeTo(target) !== "after";
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155 | }
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156 |
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157 | function getOuterFunction(path) {
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158 | return (path.scope.getFunctionParent() || path.scope.getProgramParent()).path;
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159 | }
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160 |
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161 | function isExecutionUncertain(type, key) {
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162 | switch (type) {
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163 | case "LogicalExpression":
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164 | return key === "right";
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165 |
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166 | case "ConditionalExpression":
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167 | case "IfStatement":
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168 | return key === "consequent" || key === "alternate";
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169 |
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170 | case "WhileStatement":
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171 | case "DoWhileStatement":
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172 | case "ForInStatement":
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173 | case "ForOfStatement":
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174 | return key === "body";
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175 |
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176 | case "ForStatement":
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177 | return key === "body" || key === "update";
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178 |
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179 | case "SwitchStatement":
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180 | return key === "cases";
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181 |
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182 | case "TryStatement":
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183 | return key === "handler";
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184 |
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185 | case "AssignmentPattern":
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186 | return key === "right";
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187 |
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188 | case "OptionalMemberExpression":
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189 | return key === "property";
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190 |
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191 | case "OptionalCallExpression":
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192 | return key === "arguments";
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193 |
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194 | default:
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195 | return false;
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196 | }
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197 | }
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198 |
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199 | function isExecutionUncertainInList(paths, maxIndex) {
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200 | for (let i = 0; i < maxIndex; i++) {
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201 | const path = paths[i];
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202 |
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203 | if (isExecutionUncertain(path.parent.type, path.parentKey)) {
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204 | return true;
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205 | }
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206 | }
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207 |
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208 | return false;
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209 | }
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210 |
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211 | function _guessExecutionStatusRelativeTo(target) {
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212 | const funcParent = {
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213 | this: getOuterFunction(this),
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214 | target: getOuterFunction(target)
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215 | };
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216 |
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217 | if (funcParent.target.node !== funcParent.this.node) {
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218 | return this._guessExecutionStatusRelativeToDifferentFunctions(funcParent.target);
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219 | }
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220 |
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221 | const paths = {
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222 | target: target.getAncestry(),
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223 | this: this.getAncestry()
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224 | };
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225 | if (paths.target.indexOf(this) >= 0) return "after";
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226 | if (paths.this.indexOf(target) >= 0) return "before";
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227 | let commonPath;
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228 | const commonIndex = {
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229 | target: 0,
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230 | this: 0
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231 | };
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232 |
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233 | while (!commonPath && commonIndex.this < paths.this.length) {
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234 | const path = paths.this[commonIndex.this];
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235 | commonIndex.target = paths.target.indexOf(path);
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236 |
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237 | if (commonIndex.target >= 0) {
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238 | commonPath = path;
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239 | } else {
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240 | commonIndex.this++;
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241 | }
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242 | }
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243 |
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244 | if (!commonPath) {
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245 | throw new Error("Internal Babel error - The two compared nodes" + " don't appear to belong to the same program.");
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246 | }
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247 |
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248 | if (isExecutionUncertainInList(paths.this, commonIndex.this - 1) || isExecutionUncertainInList(paths.target, commonIndex.target - 1)) {
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249 | return "unknown";
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250 | }
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251 |
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252 | const divergence = {
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253 | this: paths.this[commonIndex.this - 1],
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254 | target: paths.target[commonIndex.target - 1]
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255 | };
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256 |
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257 | if (divergence.target.listKey && divergence.this.listKey && divergence.target.container === divergence.this.container) {
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258 | return divergence.target.key > divergence.this.key ? "before" : "after";
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259 | }
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260 |
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261 | const keys = t.VISITOR_KEYS[commonPath.type];
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262 | const keyPosition = {
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263 | this: keys.indexOf(divergence.this.parentKey),
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264 | target: keys.indexOf(divergence.target.parentKey)
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265 | };
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266 | return keyPosition.target > keyPosition.this ? "before" : "after";
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267 | }
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268 |
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269 | const executionOrderCheckedNodes = new WeakSet();
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270 |
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271 | function _guessExecutionStatusRelativeToDifferentFunctions(target) {
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272 | if (!target.isFunctionDeclaration() || target.parentPath.isExportDeclaration()) {
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273 | return "unknown";
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274 | }
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275 |
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276 | const binding = target.scope.getBinding(target.node.id.name);
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277 | if (!binding.references) return "before";
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278 | const referencePaths = binding.referencePaths;
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279 | let allStatus;
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280 |
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281 | for (const path of referencePaths) {
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282 | const childOfFunction = !!path.find(path => path.node === target.node);
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283 | if (childOfFunction) continue;
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284 |
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285 | if (path.key !== "callee" || !path.parentPath.isCallExpression()) {
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286 | return "unknown";
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287 | }
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288 |
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289 | if (executionOrderCheckedNodes.has(path.node)) continue;
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290 | executionOrderCheckedNodes.add(path.node);
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291 |
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292 | const status = this._guessExecutionStatusRelativeTo(path);
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293 |
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294 | executionOrderCheckedNodes.delete(path.node);
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295 |
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296 | if (allStatus && allStatus !== status) {
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297 | return "unknown";
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298 | } else {
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299 | allStatus = status;
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300 | }
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301 | }
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302 |
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303 | return allStatus;
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304 | }
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305 |
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306 | function resolve(dangerous, resolved) {
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307 | return this._resolve(dangerous, resolved) || this;
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308 | }
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309 |
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310 | function _resolve(dangerous, resolved) {
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311 | if (resolved && resolved.indexOf(this) >= 0) return;
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312 | resolved = resolved || [];
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313 | resolved.push(this);
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314 |
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315 | if (this.isVariableDeclarator()) {
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316 | if (this.get("id").isIdentifier()) {
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317 | return this.get("init").resolve(dangerous, resolved);
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318 | } else {}
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319 | } else if (this.isReferencedIdentifier()) {
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320 | const binding = this.scope.getBinding(this.node.name);
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321 | if (!binding) return;
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322 | if (!binding.constant) return;
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323 | if (binding.kind === "module") return;
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324 |
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325 | if (binding.path !== this) {
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326 | const ret = binding.path.resolve(dangerous, resolved);
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327 | if (this.find(parent => parent.node === ret.node)) return;
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328 | return ret;
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329 | }
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330 | } else if (this.isTypeCastExpression()) {
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331 | return this.get("expression").resolve(dangerous, resolved);
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332 | } else if (dangerous && this.isMemberExpression()) {
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333 | const targetKey = this.toComputedKey();
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334 | if (!t.isLiteral(targetKey)) return;
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335 | const targetName = targetKey.value;
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336 | const target = this.get("object").resolve(dangerous, resolved);
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337 |
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338 | if (target.isObjectExpression()) {
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339 | const props = target.get("properties");
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340 |
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341 | for (const prop of props) {
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342 | if (!prop.isProperty()) continue;
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343 | const key = prop.get("key");
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344 | let match = prop.isnt("computed") && key.isIdentifier({
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345 | name: targetName
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346 | });
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347 | match = match || key.isLiteral({
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348 | value: targetName
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349 | });
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350 | if (match) return prop.get("value").resolve(dangerous, resolved);
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351 | }
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352 | } else if (target.isArrayExpression() && !isNaN(+targetName)) {
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353 | const elems = target.get("elements");
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354 | const elem = elems[targetName];
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355 | if (elem) return elem.resolve(dangerous, resolved);
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356 | }
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357 | }
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358 | }
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359 |
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360 | function isConstantExpression() {
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361 | if (this.isIdentifier()) {
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362 | const binding = this.scope.getBinding(this.node.name);
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363 | if (!binding) return false;
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364 | return binding.constant;
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365 | }
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366 |
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367 | if (this.isLiteral()) {
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368 | if (this.isRegExpLiteral()) {
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369 | return false;
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370 | }
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371 |
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372 | if (this.isTemplateLiteral()) {
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373 | return this.get("expressions").every(expression => expression.isConstantExpression());
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374 | }
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375 |
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376 | return true;
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377 | }
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378 |
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379 | if (this.isUnaryExpression()) {
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380 | if (this.get("operator").node !== "void") {
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381 | return false;
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382 | }
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383 |
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384 | return this.get("argument").isConstantExpression();
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385 | }
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386 |
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387 | if (this.isBinaryExpression()) {
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388 | return this.get("left").isConstantExpression() && this.get("right").isConstantExpression();
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389 | }
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390 |
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391 | return false;
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392 | }
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393 |
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394 | function isInStrictMode() {
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395 | const start = this.isProgram() ? this : this.parentPath;
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396 | const strictParent = start.find(path => {
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397 | if (path.isProgram({
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398 | sourceType: "module"
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399 | })) return true;
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400 | if (path.isClass()) return true;
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401 | if (!path.isProgram() && !path.isFunction()) return false;
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402 |
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403 | if (path.isArrowFunctionExpression() && !path.get("body").isBlockStatement()) {
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404 | return false;
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405 | }
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406 |
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407 | let {
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408 | node
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409 | } = path;
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410 | if (path.isFunction()) node = node.body;
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411 |
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412 | for (const directive of node.directives) {
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413 | if (directive.value.value === "use strict") {
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414 | return true;
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415 | }
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416 | }
|
417 | });
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418 | return !!strictParent;
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419 | } |
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