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 _t = require('@babel/types');
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6 |
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7 | function _interopNamespace(e) {
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8 | if (e && e.__esModule) return e;
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9 | var n = Object.create(null);
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10 | if (e) {
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11 | Object.keys(e).forEach(function (k) {
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12 | if (k !== 'default') {
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13 | var d = Object.getOwnPropertyDescriptor(e, k);
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14 | Object.defineProperty(n, k, d.get ? d : {
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15 | enumerable: true,
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16 | get: function () {
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17 | return e[k];
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18 | }
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19 | });
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20 | }
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21 | });
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22 | }
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23 | n['default'] = e;
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24 | return Object.freeze(n);
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25 | }
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26 |
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27 | var _t__namespace = _interopNamespace(_t);
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28 |
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29 | function willPathCastToBoolean(path) {
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30 | const maybeWrapped = path;
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31 | const {
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32 | node,
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33 | parentPath
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34 | } = maybeWrapped;
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35 |
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36 | if (parentPath.isLogicalExpression()) {
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37 | const {
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38 | operator,
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39 | right
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40 | } = parentPath.node;
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41 |
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42 | if (operator === "&&" || operator === "||" || operator === "??" && node === right) {
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43 | return willPathCastToBoolean(parentPath);
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44 | }
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45 | }
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46 |
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47 | if (parentPath.isSequenceExpression()) {
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48 | const {
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49 | expressions
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50 | } = parentPath.node;
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51 |
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52 | if (expressions[expressions.length - 1] === node) {
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53 | return willPathCastToBoolean(parentPath);
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54 | } else {
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55 | return true;
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56 | }
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57 | }
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58 |
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59 | return parentPath.isConditional({
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60 | test: node
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61 | }) || parentPath.isUnaryExpression({
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62 | operator: "!"
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63 | }) || parentPath.isLoop({
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64 | test: node
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65 | });
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66 | }
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67 |
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68 | const {
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69 | LOGICAL_OPERATORS,
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70 | arrowFunctionExpression,
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71 | assignmentExpression,
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72 | binaryExpression,
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73 | booleanLiteral,
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74 | callExpression,
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75 | cloneNode,
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76 | conditionalExpression,
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77 | identifier,
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78 | isMemberExpression,
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79 | isOptionalCallExpression,
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80 | isOptionalMemberExpression,
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81 | isUpdateExpression,
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82 | logicalExpression,
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83 | memberExpression,
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84 | nullLiteral,
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85 | numericLiteral,
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86 | optionalCallExpression,
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87 | optionalMemberExpression,
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88 | sequenceExpression,
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89 | unaryExpression
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90 | } = _t__namespace;
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91 |
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92 | class AssignmentMemoiser {
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93 | constructor() {
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94 | this._map = void 0;
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95 | this._map = new WeakMap();
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96 | }
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97 |
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98 | has(key) {
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99 | return this._map.has(key);
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100 | }
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101 |
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102 | get(key) {
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103 | if (!this.has(key)) return;
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104 |
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105 | const record = this._map.get(key);
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106 |
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107 | const {
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108 | value
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109 | } = record;
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110 | record.count--;
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111 |
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112 | if (record.count === 0) {
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113 | return assignmentExpression("=", value, key);
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114 | }
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115 |
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116 | return value;
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117 | }
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118 |
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119 | set(key, value, count) {
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120 | return this._map.set(key, {
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121 | count,
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122 | value
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123 | });
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124 | }
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125 |
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126 | }
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127 |
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128 | function toNonOptional(path, base) {
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129 | const {
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130 | node
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131 | } = path;
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132 |
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133 | if (isOptionalMemberExpression(node)) {
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134 | return memberExpression(base, node.property, node.computed);
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135 | }
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136 |
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137 | if (path.isOptionalCallExpression()) {
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138 | const callee = path.get("callee");
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139 |
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140 | if (path.node.optional && callee.isOptionalMemberExpression()) {
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141 | const {
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142 | object
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143 | } = callee.node;
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144 | const context = path.scope.maybeGenerateMemoised(object) || object;
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145 | callee.get("object").replaceWith(assignmentExpression("=", context, object));
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146 | return callExpression(memberExpression(base, identifier("call")), [context, ...path.node.arguments]);
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147 | }
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148 |
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149 | return callExpression(base, path.node.arguments);
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150 | }
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151 |
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152 | return path.node;
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153 | }
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154 |
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155 | function isInDetachedTree(path) {
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156 | while (path) {
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157 | if (path.isProgram()) break;
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158 | const {
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159 | parentPath,
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160 | container,
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161 | listKey
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162 | } = path;
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163 | const parentNode = parentPath.node;
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164 |
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165 | if (listKey) {
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166 | if (container !== parentNode[listKey]) return true;
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167 | } else {
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168 | if (container !== parentNode) return true;
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169 | }
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170 |
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171 | path = parentPath;
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172 | }
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173 |
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174 | return false;
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175 | }
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176 |
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177 | const handle = {
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178 | memoise() {},
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179 |
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180 | handle(member, noDocumentAll) {
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181 | const {
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182 | node,
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183 | parent,
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184 | parentPath,
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185 | scope
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186 | } = member;
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187 |
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188 | if (member.isOptionalMemberExpression()) {
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189 | if (isInDetachedTree(member)) return;
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190 | const endPath = member.find(({
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191 | node,
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192 | parent
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193 | }) => {
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194 | if (isOptionalMemberExpression(parent)) {
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195 | return parent.optional || parent.object !== node;
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196 | }
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197 |
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198 | if (isOptionalCallExpression(parent)) {
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199 | return node !== member.node && parent.optional || parent.callee !== node;
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200 | }
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201 |
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202 | return true;
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203 | });
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204 |
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205 | if (scope.path.isPattern()) {
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206 | endPath.replaceWith(callExpression(arrowFunctionExpression([], endPath.node), []));
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207 | return;
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208 | }
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209 |
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210 | const willEndPathCastToBoolean = willPathCastToBoolean(endPath);
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211 | const rootParentPath = endPath.parentPath;
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212 |
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213 | if (rootParentPath.isUpdateExpression({
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214 | argument: node
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215 | }) || rootParentPath.isAssignmentExpression({
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216 | left: node
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217 | })) {
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218 | throw member.buildCodeFrameError(`can't handle assignment`);
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219 | }
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220 |
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221 | const isDeleteOperation = rootParentPath.isUnaryExpression({
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222 | operator: "delete"
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223 | });
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224 |
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225 | if (isDeleteOperation && endPath.isOptionalMemberExpression() && endPath.get("property").isPrivateName()) {
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226 | throw member.buildCodeFrameError(`can't delete a private class element`);
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227 | }
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228 |
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229 | let startingOptional = member;
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230 |
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231 | for (;;) {
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232 | if (startingOptional.isOptionalMemberExpression()) {
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233 | if (startingOptional.node.optional) break;
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234 | startingOptional = startingOptional.get("object");
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235 | continue;
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236 | } else if (startingOptional.isOptionalCallExpression()) {
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237 | if (startingOptional.node.optional) break;
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238 | startingOptional = startingOptional.get("callee");
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239 | continue;
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240 | }
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241 |
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242 | throw new Error(`Internal error: unexpected ${startingOptional.node.type}`);
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243 | }
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244 |
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245 | const startingProp = startingOptional.isOptionalMemberExpression() ? "object" : "callee";
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246 | const startingNode = startingOptional.node[startingProp];
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247 | const baseNeedsMemoised = scope.maybeGenerateMemoised(startingNode);
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248 | const baseRef = baseNeedsMemoised != null ? baseNeedsMemoised : startingNode;
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249 | const parentIsOptionalCall = parentPath.isOptionalCallExpression({
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250 | callee: node
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251 | });
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252 |
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253 | const isOptionalCall = parent => parentIsOptionalCall;
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254 |
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255 | const parentIsCall = parentPath.isCallExpression({
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256 | callee: node
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257 | });
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258 | startingOptional.replaceWith(toNonOptional(startingOptional, baseRef));
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259 |
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260 | if (isOptionalCall()) {
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261 | if (parent.optional) {
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262 | parentPath.replaceWith(this.optionalCall(member, parent.arguments));
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263 | } else {
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264 | parentPath.replaceWith(this.call(member, parent.arguments));
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265 | }
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266 | } else if (parentIsCall) {
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267 | member.replaceWith(this.boundGet(member));
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268 | } else {
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269 | member.replaceWith(this.get(member));
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270 | }
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271 |
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272 | let regular = member.node;
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273 |
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274 | for (let current = member; current !== endPath;) {
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275 | const parentPath = current.parentPath;
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276 |
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277 | if (parentPath === endPath && isOptionalCall() && parent.optional) {
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278 | regular = parentPath.node;
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279 | break;
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280 | }
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281 |
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282 | regular = toNonOptional(parentPath, regular);
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283 | current = parentPath;
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284 | }
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285 |
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286 | let context;
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287 | const endParentPath = endPath.parentPath;
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288 |
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289 | if (isMemberExpression(regular) && endParentPath.isOptionalCallExpression({
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290 | callee: endPath.node,
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291 | optional: true
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292 | })) {
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293 | const {
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294 | object
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295 | } = regular;
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296 | context = member.scope.maybeGenerateMemoised(object);
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297 |
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298 | if (context) {
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299 | regular.object = assignmentExpression("=", context, object);
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300 | }
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301 | }
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302 |
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303 | let replacementPath = endPath;
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304 |
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305 | if (isDeleteOperation) {
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306 | replacementPath = endParentPath;
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307 | regular = endParentPath.node;
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308 | }
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309 |
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310 | const baseMemoised = baseNeedsMemoised ? assignmentExpression("=", cloneNode(baseRef), cloneNode(startingNode)) : cloneNode(baseRef);
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311 |
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312 | if (willEndPathCastToBoolean) {
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313 | let nonNullishCheck;
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314 |
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315 | if (noDocumentAll) {
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316 | nonNullishCheck = binaryExpression("!=", baseMemoised, nullLiteral());
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317 | } else {
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318 | nonNullishCheck = logicalExpression("&&", binaryExpression("!==", baseMemoised, nullLiteral()), binaryExpression("!==", cloneNode(baseRef), scope.buildUndefinedNode()));
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319 | }
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320 |
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321 | replacementPath.replaceWith(logicalExpression("&&", nonNullishCheck, regular));
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322 | } else {
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323 | let nullishCheck;
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324 |
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325 | if (noDocumentAll) {
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326 | nullishCheck = binaryExpression("==", baseMemoised, nullLiteral());
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327 | } else {
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328 | nullishCheck = logicalExpression("||", binaryExpression("===", baseMemoised, nullLiteral()), binaryExpression("===", cloneNode(baseRef), scope.buildUndefinedNode()));
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329 | }
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330 |
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331 | replacementPath.replaceWith(conditionalExpression(nullishCheck, isDeleteOperation ? booleanLiteral(true) : scope.buildUndefinedNode(), regular));
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332 | }
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333 |
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334 | if (context) {
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335 | const endParent = endParentPath.node;
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336 | endParentPath.replaceWith(optionalCallExpression(optionalMemberExpression(endParent.callee, identifier("call"), false, true), [cloneNode(context), ...endParent.arguments], false));
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337 | }
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338 |
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339 | return;
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340 | }
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341 |
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342 | if (isUpdateExpression(parent, {
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343 | argument: node
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344 | })) {
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345 | if (this.simpleSet) {
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346 | member.replaceWith(this.simpleSet(member));
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347 | return;
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348 | }
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349 |
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350 | const {
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351 | operator,
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352 | prefix
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353 | } = parent;
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354 | this.memoise(member, 2);
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355 | const value = binaryExpression(operator[0], unaryExpression("+", this.get(member)), numericLiteral(1));
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356 |
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357 | if (prefix) {
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358 | parentPath.replaceWith(this.set(member, value));
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359 | } else {
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360 | const {
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361 | scope
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362 | } = member;
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363 | const ref = scope.generateUidIdentifierBasedOnNode(node);
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364 | scope.push({
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365 | id: ref
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366 | });
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367 | value.left = assignmentExpression("=", cloneNode(ref), value.left);
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368 | parentPath.replaceWith(sequenceExpression([this.set(member, value), cloneNode(ref)]));
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369 | }
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370 |
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371 | return;
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372 | }
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373 |
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374 | if (parentPath.isAssignmentExpression({
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375 | left: node
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376 | })) {
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377 | if (this.simpleSet) {
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378 | member.replaceWith(this.simpleSet(member));
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379 | return;
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380 | }
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381 |
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382 | const {
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383 | operator,
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384 | right: value
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385 | } = parentPath.node;
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386 |
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387 | if (operator === "=") {
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388 | parentPath.replaceWith(this.set(member, value));
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389 | } else {
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390 | const operatorTrunc = operator.slice(0, -1);
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391 |
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392 | if (LOGICAL_OPERATORS.includes(operatorTrunc)) {
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393 | this.memoise(member, 1);
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394 | parentPath.replaceWith(logicalExpression(operatorTrunc, this.get(member), this.set(member, value)));
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395 | } else {
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396 | this.memoise(member, 2);
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397 | parentPath.replaceWith(this.set(member, binaryExpression(operatorTrunc, this.get(member), value)));
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398 | }
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399 | }
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400 |
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401 | return;
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402 | }
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403 |
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404 | if (parentPath.isCallExpression({
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405 | callee: node
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406 | })) {
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407 | parentPath.replaceWith(this.call(member, parentPath.node.arguments));
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408 | return;
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409 | }
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410 |
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411 | if (parentPath.isOptionalCallExpression({
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412 | callee: node
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413 | })) {
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414 | if (scope.path.isPattern()) {
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415 | parentPath.replaceWith(callExpression(arrowFunctionExpression([], parentPath.node), []));
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416 | return;
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417 | }
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418 |
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419 | parentPath.replaceWith(this.optionalCall(member, parentPath.node.arguments));
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420 | return;
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421 | }
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422 |
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423 | if (parentPath.isForXStatement({
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424 | left: node
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425 | }) || parentPath.isObjectProperty({
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426 | value: node
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427 | }) && parentPath.parentPath.isObjectPattern() || parentPath.isAssignmentPattern({
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428 | left: node
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429 | }) && parentPath.parentPath.isObjectProperty({
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430 | value: parent
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431 | }) && parentPath.parentPath.parentPath.isObjectPattern() || parentPath.isArrayPattern() || parentPath.isAssignmentPattern({
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432 | left: node
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433 | }) && parentPath.parentPath.isArrayPattern() || parentPath.isRestElement()) {
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434 | member.replaceWith(this.destructureSet(member));
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435 | return;
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436 | }
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437 |
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438 | if (parentPath.isTaggedTemplateExpression()) {
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439 | member.replaceWith(this.boundGet(member));
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440 | } else {
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441 | member.replaceWith(this.get(member));
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442 | }
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443 | }
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444 |
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445 | };
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446 | function memberExpressionToFunctions(path, visitor, state) {
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447 | path.traverse(visitor, Object.assign({}, handle, state, {
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448 | memoiser: new AssignmentMemoiser()
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449 | }));
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450 | }
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451 |
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452 | exports.default = memberExpressionToFunctions;
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453 |
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