| 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.default = void 0;
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| 7 | var _renamer = require("./lib/renamer.js");
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| 8 | var _index = require("../index.js");
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| 9 | var _traverseForScope = require("./traverseForScope.js");
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| 10 | var _binding = require("./binding.js");
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| 11 | var _t = require("@babel/types");
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| 12 | var t = _t;
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| 13 | var _cache = require("../cache.js");
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| 14 | const globalsBuiltinLower = require("@babel/helper-globals/data/builtin-lower.json"),
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| 15 | globalsBuiltinUpper = require("@babel/helper-globals/data/builtin-upper.json");
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| 16 | const {
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| 17 | assignmentExpression,
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| 18 | callExpression,
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| 19 | cloneNode,
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| 20 | getBindingIdentifiers,
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| 21 | identifier,
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| 22 | isArrayExpression,
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| 23 | isBinary,
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| 24 | isCallExpression,
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| 25 | isClass,
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| 26 | isClassBody,
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| 27 | isClassDeclaration,
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| 28 | isExportAllDeclaration,
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| 29 | isExportDefaultDeclaration,
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| 30 | isExportNamedDeclaration,
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| 31 | isFunctionDeclaration,
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| 32 | isIdentifier,
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| 33 | isImportDeclaration,
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| 34 | isLiteral,
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| 35 | isMemberExpression,
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| 36 | isMethod,
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| 37 | isModuleSpecifier,
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| 38 | isNullLiteral,
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| 39 | isObjectExpression,
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| 40 | isProperty,
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| 41 | isPureish,
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| 42 | isRegExpLiteral,
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| 43 | isSuper,
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| 44 | isTaggedTemplateExpression,
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| 45 | isTemplateLiteral,
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| 46 | isThisExpression,
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| 47 | isUnaryExpression,
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| 48 | isVariableDeclaration,
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| 49 | expressionStatement,
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| 50 | matchesPattern,
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| 51 | memberExpression,
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| 52 | numericLiteral,
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| 53 | toIdentifier,
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| 54 | variableDeclaration,
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| 55 | variableDeclarator,
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| 56 | isObjectProperty,
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| 57 | isTopicReference,
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| 58 | isMetaProperty,
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| 59 | isPrivateName,
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| 60 | isExportDeclaration,
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| 61 | buildUndefinedNode,
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| 62 | sequenceExpression
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| 63 | } = _t;
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| 64 | function gatherNodeParts(node, parts) {
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| 65 | switch (node == null ? void 0 : node.type) {
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| 66 | default:
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| 67 | if (isImportDeclaration(node) || isExportDeclaration(node)) {
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| 68 | var _node$specifiers;
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| 69 | if ((isExportAllDeclaration(node) || isExportNamedDeclaration(node) || isImportDeclaration(node)) && node.source) {
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| 70 | gatherNodeParts(node.source, parts);
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| 71 | } else if ((isExportNamedDeclaration(node) || isImportDeclaration(node)) && (_node$specifiers = node.specifiers) != null && _node$specifiers.length) {
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| 72 | for (const e of node.specifiers) gatherNodeParts(e, parts);
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| 73 | } else if ((isExportDefaultDeclaration(node) || isExportNamedDeclaration(node)) && node.declaration) {
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| 74 | gatherNodeParts(node.declaration, parts);
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| 75 | }
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| 76 | } else if (isModuleSpecifier(node)) {
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| 77 | gatherNodeParts(node.local, parts);
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| 78 | } else if (isLiteral(node) && !isNullLiteral(node) && !isRegExpLiteral(node) && !isTemplateLiteral(node)) {
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| 79 | parts.push(node.value);
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| 80 | }
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| 81 | break;
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| 82 | case "MemberExpression":
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| 83 | case "OptionalMemberExpression":
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| 84 | case "JSXMemberExpression":
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| 85 | gatherNodeParts(node.object, parts);
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| 86 | gatherNodeParts(node.property, parts);
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| 87 | break;
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| 88 | case "Identifier":
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| 89 | case "JSXIdentifier":
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| 90 | parts.push(node.name);
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| 91 | break;
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| 92 | case "CallExpression":
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| 93 | case "OptionalCallExpression":
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| 94 | case "NewExpression":
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| 95 | gatherNodeParts(node.callee, parts);
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| 96 | break;
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| 97 | case "ObjectExpression":
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| 98 | case "ObjectPattern":
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| 99 | for (const e of node.properties) {
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| 100 | gatherNodeParts(e, parts);
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| 101 | }
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| 102 | break;
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| 103 | case "SpreadElement":
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| 104 | case "RestElement":
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| 105 | gatherNodeParts(node.argument, parts);
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| 106 | break;
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| 107 | case "ObjectProperty":
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| 108 | case "ObjectMethod":
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| 109 | case "ClassProperty":
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| 110 | case "ClassMethod":
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| 111 | case "ClassPrivateProperty":
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| 112 | case "ClassPrivateMethod":
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| 113 | gatherNodeParts(node.key, parts);
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| 114 | break;
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| 115 | case "ThisExpression":
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| 116 | parts.push("this");
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| 117 | break;
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| 118 | case "Super":
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| 119 | parts.push("super");
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| 120 | break;
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| 121 | case "Import":
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| 122 | case "ImportExpression":
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| 123 | parts.push("import");
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| 124 | break;
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| 125 | case "DoExpression":
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| 126 | parts.push("do");
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| 127 | break;
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| 128 | case "YieldExpression":
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| 129 | parts.push("yield");
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| 130 | gatherNodeParts(node.argument, parts);
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| 131 | break;
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| 132 | case "AwaitExpression":
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| 133 | parts.push("await");
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| 134 | gatherNodeParts(node.argument, parts);
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| 135 | break;
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| 136 | case "AssignmentExpression":
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| 137 | gatherNodeParts(node.left, parts);
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| 138 | break;
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| 139 | case "VariableDeclarator":
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| 140 | gatherNodeParts(node.id, parts);
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| 141 | break;
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| 142 | case "FunctionExpression":
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| 143 | case "FunctionDeclaration":
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| 144 | case "ClassExpression":
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| 145 | case "ClassDeclaration":
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| 146 | gatherNodeParts(node.id, parts);
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| 147 | break;
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| 148 | case "PrivateName":
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| 149 | gatherNodeParts(node.id, parts);
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| 150 | break;
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| 151 | case "ParenthesizedExpression":
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| 152 | gatherNodeParts(node.expression, parts);
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| 153 | break;
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| 154 | case "UnaryExpression":
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| 155 | case "UpdateExpression":
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| 156 | gatherNodeParts(node.argument, parts);
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| 157 | break;
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| 158 | case "MetaProperty":
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| 159 | gatherNodeParts(node.meta, parts);
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| 160 | gatherNodeParts(node.property, parts);
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| 161 | break;
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| 162 | case "JSXElement":
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| 163 | gatherNodeParts(node.openingElement, parts);
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| 164 | break;
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| 165 | case "JSXOpeningElement":
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| 166 | gatherNodeParts(node.name, parts);
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| 167 | break;
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| 168 | case "JSXFragment":
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| 169 | gatherNodeParts(node.openingFragment, parts);
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| 170 | break;
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| 171 | case "JSXOpeningFragment":
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| 172 | parts.push("Fragment");
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| 173 | break;
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| 174 | case "JSXNamespacedName":
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| 175 | gatherNodeParts(node.namespace, parts);
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| 176 | gatherNodeParts(node.name, parts);
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| 177 | break;
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| 178 | }
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| 179 | }
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| 180 | function resetScope(scope) {
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| 181 | scope.references = Object.create(null);
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| 182 | scope.uids = Object.create(null);
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| 183 | scope.bindings = Object.create(null);
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| 184 | scope.globals = Object.create(null);
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| 185 | }
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| 186 | function isAnonymousFunctionExpression(path) {
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| 187 | return path.isFunctionExpression() && !path.node.id || path.isArrowFunctionExpression();
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| 188 | }
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| 189 | var NOT_LOCAL_BINDING = Symbol.for("should not be considered a local binding");
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| 190 | const collectorVisitor = {
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| 191 | ForStatement(path) {
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| 192 | const declar = path.get("init");
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| 193 | if (declar.isVar()) {
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| 194 | const {
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| 195 | scope
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| 196 | } = path;
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| 197 | const parentScope = scope.getFunctionParent() || scope.getProgramParent();
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| 198 | parentScope.registerBinding("var", declar);
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| 199 | }
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| 200 | },
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| 201 | Declaration(path) {
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| 202 | if (path.isBlockScoped()) return;
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| 203 | if (path.isImportDeclaration()) return;
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| 204 | if (path.isExportDeclaration()) return;
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| 205 | const parent = path.scope.getFunctionParent() || path.scope.getProgramParent();
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| 206 | parent.registerDeclaration(path);
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| 207 | },
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| 208 | ImportDeclaration(path) {
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| 209 | const parent = path.scope.getBlockParent();
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| 210 | parent.registerDeclaration(path);
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| 211 | },
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| 212 | TSImportEqualsDeclaration(path) {
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| 213 | const parent = path.scope.getBlockParent();
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| 214 | parent.registerDeclaration(path);
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| 215 | },
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| 216 | ReferencedIdentifier(path, state) {
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| 217 | if (t.isTSQualifiedName(path.parent) && path.parent.right === path.node) {
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| 218 | return;
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| 219 | }
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| 220 | if (path.parentPath.isTSImportEqualsDeclaration()) return;
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| 221 | state.references.push(path);
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| 222 | },
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| 223 | ForXStatement(path, state) {
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| 224 | const left = path.get("left");
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| 225 | if (left.isPattern() || left.isIdentifier()) {
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| 226 | state.constantViolations.push(path);
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| 227 | } else if (left.isVar()) {
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| 228 | const {
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| 229 | scope
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| 230 | } = path;
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| 231 | const parentScope = scope.getFunctionParent() || scope.getProgramParent();
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| 232 | parentScope.registerBinding("var", left);
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| 233 | }
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| 234 | },
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| 235 | ExportDeclaration: {
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| 236 | exit(path) {
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| 237 | const {
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| 238 | node,
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| 239 | scope
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| 240 | } = path;
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| 241 | if (isExportAllDeclaration(node)) return;
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| 242 | const declar = node.declaration;
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| 243 | if (isClassDeclaration(declar) || isFunctionDeclaration(declar)) {
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| 244 | const id = declar.id;
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| 245 | if (!id) return;
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| 246 | const binding = scope.getBinding(id.name);
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| 247 | binding == null || binding.reference(path);
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| 248 | } else if (isVariableDeclaration(declar)) {
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| 249 | for (const decl of declar.declarations) {
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| 250 | for (const name of Object.keys(getBindingIdentifiers(decl))) {
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| 251 | const binding = scope.getBinding(name);
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| 252 | binding == null || binding.reference(path);
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| 253 | }
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| 254 | }
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| 255 | }
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| 256 | }
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| 257 | },
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| 258 | LabeledStatement(path) {
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| 259 | path.scope.getBlockParent().registerDeclaration(path);
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| 260 | },
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| 261 | AssignmentExpression(path, state) {
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| 262 | state.assignments.push(path);
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| 263 | },
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| 264 | UpdateExpression(path, state) {
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| 265 | state.constantViolations.push(path);
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| 266 | },
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| 267 | UnaryExpression(path, state) {
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| 268 | if (path.node.operator === "delete") {
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| 269 | state.constantViolations.push(path);
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| 270 | }
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| 271 | },
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| 272 | BlockScoped(path) {
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| 273 | let scope = path.scope;
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| 274 | if (scope.path === path) scope = scope.parent;
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| 275 | const parent = scope.getBlockParent();
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| 276 | parent.registerDeclaration(path);
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| 277 | if (path.isClassDeclaration() && path.node.id) {
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| 278 | const id = path.node.id;
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| 279 | const name = id.name;
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| 280 | path.scope.bindings[name] = path.scope.parent.getBinding(name);
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| 281 | }
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| 282 | },
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| 283 | CatchClause(path) {
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| 284 | path.scope.registerBinding("let", path);
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| 285 | },
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| 286 | Function(path) {
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| 287 | const params = path.get("params");
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| 288 | for (const param of params) {
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| 289 | path.scope.registerBinding("param", param);
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| 290 | }
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| 291 | if (path.isFunctionExpression() && path.node.id && !path.node.id[NOT_LOCAL_BINDING]) {
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| 292 | path.scope.registerBinding("local", path.get("id"), path);
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| 293 | }
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| 294 | },
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| 295 | ClassExpression(path) {
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| 296 | if (path.node.id && !path.node.id[NOT_LOCAL_BINDING]) {
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| 297 | path.scope.registerBinding("local", path.get("id"), path);
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| 298 | }
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| 299 | },
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| 300 | TSTypeAnnotation(path) {
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| 301 | path.skip();
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| 302 | }
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| 303 | };
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| 304 | let scopeVisitor;
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| 305 | let uid = 0;
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| 306 | class Scope {
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| 307 | constructor(path) {
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| 308 | this.uid = void 0;
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| 309 | this.path = void 0;
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| 310 | this.block = void 0;
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| 311 | this.inited = void 0;
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| 312 | this.labels = void 0;
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| 313 | this.bindings = void 0;
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| 314 | this.referencesSet = void 0;
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| 315 | this.globals = void 0;
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| 316 | this.uidsSet = void 0;
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| 317 | this.data = void 0;
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| 318 | this.crawling = void 0;
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| 319 | const {
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| 320 | node
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| 321 | } = path;
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| 322 | const cached = _cache.scope.get(node);
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| 323 | if ((cached == null ? void 0 : cached.path) === path) {
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| 324 | return cached;
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| 325 | }
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| 326 | _cache.scope.set(node, this);
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| 327 | this.uid = uid++;
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| 328 | this.block = node;
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| 329 | this.path = path;
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| 330 | this.labels = new Map();
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| 331 | this.inited = false;
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| 332 | Object.defineProperties(this, {
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| 333 | references: {
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| 334 | enumerable: true,
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| 335 | configurable: true,
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| 336 | writable: true,
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| 337 | value: Object.create(null)
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| 338 | },
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| 339 | uids: {
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| 340 | enumerable: true,
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| 341 | configurable: true,
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| 342 | writable: true,
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| 343 | value: Object.create(null)
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| 344 | }
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| 345 | });
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| 346 | }
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| 347 | get parent() {
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| 348 | var _parent;
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| 349 | let parent,
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| 350 | path = this.path;
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| 351 | do {
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| 352 | var _path;
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| 353 | const shouldSkip = path.key === "key" || path.listKey === "decorators";
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| 354 | path = path.parentPath;
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| 355 | if (shouldSkip && path.isMethod()) path = path.parentPath;
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| 356 | if ((_path = path) != null && _path.isScope()) parent = path;
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| 357 | } while (path && !parent);
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| 358 | return (_parent = parent) == null ? void 0 : _parent.scope;
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| 359 | }
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| 360 | get references() {
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| 361 | throw new Error("Scope#references is not available in Babel 8. Use Scope#referencesSet instead.");
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| 362 | }
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| 363 | get uids() {
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| 364 | throw new Error("Scope#uids is not available in Babel 8. Use Scope#uidsSet instead.");
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| 365 | }
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| 366 | generateDeclaredUidIdentifier(name) {
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| 367 | const id = this.generateUidIdentifier(name);
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| 368 | this.push({
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| 369 | id
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| 370 | });
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| 371 | return cloneNode(id);
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| 372 | }
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| 373 | generateUidIdentifier(name) {
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| 374 | return identifier(this.generateUid(name));
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| 375 | }
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| 376 | generateUid(name = "temp") {
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| 377 | name = toIdentifier(name).replace(/^_+/, "").replace(/\d+$/g, "");
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| 378 | let uid;
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| 379 | let i = 0;
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| 380 | do {
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| 381 | uid = `_${name}`;
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| 382 | if (i >= 11) uid += i - 1;else if (i >= 9) uid += i - 9;else if (i >= 1) uid += i + 1;
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| 383 | i++;
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| 384 | } while (this.hasLabel(uid) || this.hasBinding(uid) || this.hasGlobal(uid) || this.hasReference(uid));
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| 385 | const program = this.getProgramParent();
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| 386 | program.references[uid] = true;
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| 387 | program.uids[uid] = true;
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| 388 | return uid;
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| 389 | }
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| 390 | generateUidBasedOnNode(node, defaultName) {
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| 391 | const parts = [];
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| 392 | gatherNodeParts(node, parts);
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| 393 | let id = parts.join("$");
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| 394 | id = id.replace(/^_/, "") || defaultName || "ref";
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| 395 | return this.generateUid(id.slice(0, 20));
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| 396 | }
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| 397 | generateUidIdentifierBasedOnNode(node, defaultName) {
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| 398 | return identifier(this.generateUidBasedOnNode(node, defaultName));
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| 399 | }
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| 400 | isStatic(node) {
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| 401 | if (isThisExpression(node) || isSuper(node) || isTopicReference(node)) {
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| 402 | return true;
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| 403 | }
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| 404 | if (isIdentifier(node)) {
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| 405 | const binding = this.getBinding(node.name);
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| 406 | if (binding) {
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| 407 | return binding.constant;
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| 408 | } else {
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| 409 | return this.hasBinding(node.name);
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| 410 | }
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| 411 | }
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| 412 | return false;
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| 413 | }
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| 414 | maybeGenerateMemoised(node, dontPush) {
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| 415 | if (this.isStatic(node)) {
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| 416 | return null;
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| 417 | } else {
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| 418 | const id = this.generateUidIdentifierBasedOnNode(node);
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| 419 | if (!dontPush) {
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| 420 | this.push({
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| 421 | id
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| 422 | });
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| 423 | return cloneNode(id);
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| 424 | }
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| 425 | return id;
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| 426 | }
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| 427 | }
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| 428 | checkBlockScopedCollisions(local, kind, name, id) {
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| 429 | if (kind === "param") return;
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| 430 | if (local.kind === "local") return;
|
|---|
| 431 | const duplicate = kind === "let" || local.kind === "let" || local.kind === "const" || local.kind === "module" || local.kind === "param" && kind === "const";
|
|---|
| 432 | if (duplicate) {
|
|---|
| 433 | throw this.path.hub.buildError(id, `Duplicate declaration "${name}"`, TypeError);
|
|---|
| 434 | }
|
|---|
| 435 | }
|
|---|
| 436 | rename(oldName, newName) {
|
|---|
| 437 | const binding = this.getBinding(oldName);
|
|---|
| 438 | if (binding) {
|
|---|
| 439 | newName || (newName = this.generateUidIdentifier(oldName).name);
|
|---|
| 440 | const renamer = new _renamer.default(binding, oldName, newName);
|
|---|
| 441 | renamer.rename(arguments[2]);
|
|---|
| 442 | }
|
|---|
| 443 | }
|
|---|
| 444 | dump() {
|
|---|
| 445 | const sep = "-".repeat(60);
|
|---|
| 446 | console.log(sep);
|
|---|
| 447 | let scope = this;
|
|---|
| 448 | do {
|
|---|
| 449 | console.log("#", scope.block.type);
|
|---|
| 450 | for (const name of Object.keys(scope.bindings)) {
|
|---|
| 451 | const binding = scope.bindings[name];
|
|---|
| 452 | console.log(" -", name, {
|
|---|
| 453 | constant: binding.constant,
|
|---|
| 454 | references: binding.references,
|
|---|
| 455 | violations: binding.constantViolations.length,
|
|---|
| 456 | kind: binding.kind
|
|---|
| 457 | });
|
|---|
| 458 | }
|
|---|
| 459 | } while (scope = scope.parent);
|
|---|
| 460 | console.log(sep);
|
|---|
| 461 | }
|
|---|
| 462 | hasLabel(name) {
|
|---|
| 463 | return !!this.getLabel(name);
|
|---|
| 464 | }
|
|---|
| 465 | getLabel(name) {
|
|---|
| 466 | return this.labels.get(name);
|
|---|
| 467 | }
|
|---|
| 468 | registerLabel(path) {
|
|---|
| 469 | this.labels.set(path.node.label.name, path);
|
|---|
| 470 | }
|
|---|
| 471 | registerDeclaration(path) {
|
|---|
| 472 | if (path.isLabeledStatement()) {
|
|---|
| 473 | this.registerLabel(path);
|
|---|
| 474 | } else if (path.isFunctionDeclaration()) {
|
|---|
| 475 | this.registerBinding("hoisted", path.get("id"), path);
|
|---|
| 476 | } else if (path.isVariableDeclaration()) {
|
|---|
| 477 | const declarations = path.get("declarations");
|
|---|
| 478 | const {
|
|---|
| 479 | kind
|
|---|
| 480 | } = path.node;
|
|---|
| 481 | for (const declar of declarations) {
|
|---|
| 482 | this.registerBinding(kind === "using" || kind === "await using" ? "const" : kind, declar);
|
|---|
| 483 | }
|
|---|
| 484 | } else if (path.isClassDeclaration()) {
|
|---|
| 485 | if (path.node.declare) return;
|
|---|
| 486 | this.registerBinding("let", path);
|
|---|
| 487 | } else if (path.isImportDeclaration()) {
|
|---|
| 488 | const isTypeDeclaration = path.node.importKind === "type" || path.node.importKind === "typeof";
|
|---|
| 489 | const specifiers = path.get("specifiers");
|
|---|
| 490 | for (const specifier of specifiers) {
|
|---|
| 491 | const isTypeSpecifier = isTypeDeclaration || specifier.isImportSpecifier() && (specifier.node.importKind === "type" || specifier.node.importKind === "typeof");
|
|---|
| 492 | this.registerBinding(isTypeSpecifier ? "unknown" : "module", specifier);
|
|---|
| 493 | }
|
|---|
| 494 | } else if (path.isExportDeclaration()) {
|
|---|
| 495 | const declar = path.get("declaration");
|
|---|
| 496 | if (declar.isClassDeclaration() || declar.isFunctionDeclaration() || declar.isVariableDeclaration()) {
|
|---|
| 497 | this.registerDeclaration(declar);
|
|---|
| 498 | }
|
|---|
| 499 | } else {
|
|---|
| 500 | this.registerBinding("unknown", path);
|
|---|
| 501 | }
|
|---|
| 502 | }
|
|---|
| 503 | buildUndefinedNode() {
|
|---|
| 504 | return buildUndefinedNode();
|
|---|
| 505 | }
|
|---|
| 506 | registerConstantViolation(path) {
|
|---|
| 507 | const ids = path.getAssignmentIdentifiers();
|
|---|
| 508 | for (const name of Object.keys(ids)) {
|
|---|
| 509 | var _this$getBinding;
|
|---|
| 510 | (_this$getBinding = this.getBinding(name)) == null || _this$getBinding.reassign(path);
|
|---|
| 511 | }
|
|---|
| 512 | }
|
|---|
| 513 | registerBinding(kind, path, bindingPath = path) {
|
|---|
| 514 | if (!kind) throw new ReferenceError("no `kind`");
|
|---|
| 515 | if (path.isVariableDeclaration()) {
|
|---|
| 516 | const declarators = path.get("declarations");
|
|---|
| 517 | for (const declar of declarators) {
|
|---|
| 518 | this.registerBinding(kind, declar);
|
|---|
| 519 | }
|
|---|
| 520 | return;
|
|---|
| 521 | }
|
|---|
| 522 | const parent = this.getProgramParent();
|
|---|
| 523 | const ids = path.getOuterBindingIdentifiers(true);
|
|---|
| 524 | for (const name of Object.keys(ids)) {
|
|---|
| 525 | parent.references[name] = true;
|
|---|
| 526 | for (const id of ids[name]) {
|
|---|
| 527 | const local = this.getOwnBinding(name);
|
|---|
| 528 | if (local) {
|
|---|
| 529 | if (local.identifier === id) continue;
|
|---|
| 530 | this.checkBlockScopedCollisions(local, kind, name, id);
|
|---|
| 531 | }
|
|---|
| 532 | if (local) {
|
|---|
| 533 | local.reassign(bindingPath);
|
|---|
| 534 | } else {
|
|---|
| 535 | this.bindings[name] = new _binding.default({
|
|---|
| 536 | identifier: id,
|
|---|
| 537 | scope: this,
|
|---|
| 538 | path: bindingPath,
|
|---|
| 539 | kind: kind
|
|---|
| 540 | });
|
|---|
| 541 | }
|
|---|
| 542 | }
|
|---|
| 543 | }
|
|---|
| 544 | }
|
|---|
| 545 | addGlobal(node) {
|
|---|
| 546 | this.globals[node.name] = node;
|
|---|
| 547 | }
|
|---|
| 548 | hasUid(name) {
|
|---|
| 549 | let scope = this;
|
|---|
| 550 | do {
|
|---|
| 551 | if (scope.uids[name]) return true;
|
|---|
| 552 | } while (scope = scope.parent);
|
|---|
| 553 | return false;
|
|---|
| 554 | }
|
|---|
| 555 | hasGlobal(name) {
|
|---|
| 556 | let scope = this;
|
|---|
| 557 | do {
|
|---|
| 558 | if (scope.globals[name]) return true;
|
|---|
| 559 | } while (scope = scope.parent);
|
|---|
| 560 | return false;
|
|---|
| 561 | }
|
|---|
| 562 | hasReference(name) {
|
|---|
| 563 | return !!this.getProgramParent().references[name];
|
|---|
| 564 | }
|
|---|
| 565 | isPure(node, constantsOnly) {
|
|---|
| 566 | if (isIdentifier(node)) {
|
|---|
| 567 | const binding = this.getBinding(node.name);
|
|---|
| 568 | if (!binding) return false;
|
|---|
| 569 | if (constantsOnly) return binding.constant;
|
|---|
| 570 | return true;
|
|---|
| 571 | } else if (isThisExpression(node) || isMetaProperty(node) || isTopicReference(node) || isPrivateName(node)) {
|
|---|
| 572 | return true;
|
|---|
| 573 | } else if (isClass(node)) {
|
|---|
| 574 | var _node$decorators;
|
|---|
| 575 | if (node.superClass && !this.isPure(node.superClass, constantsOnly)) {
|
|---|
| 576 | return false;
|
|---|
| 577 | }
|
|---|
| 578 | if (((_node$decorators = node.decorators) == null ? void 0 : _node$decorators.length) > 0) {
|
|---|
| 579 | return false;
|
|---|
| 580 | }
|
|---|
| 581 | return this.isPure(node.body, constantsOnly);
|
|---|
| 582 | } else if (isClassBody(node)) {
|
|---|
| 583 | for (const method of node.body) {
|
|---|
| 584 | if (!this.isPure(method, constantsOnly)) return false;
|
|---|
| 585 | }
|
|---|
| 586 | return true;
|
|---|
| 587 | } else if (isBinary(node)) {
|
|---|
| 588 | return this.isPure(node.left, constantsOnly) && this.isPure(node.right, constantsOnly);
|
|---|
| 589 | } else if (isArrayExpression(node) || (node == null ? void 0 : node.type) === "TupleExpression") {
|
|---|
| 590 | for (const elem of node.elements) {
|
|---|
| 591 | if (elem !== null && !this.isPure(elem, constantsOnly)) return false;
|
|---|
| 592 | }
|
|---|
| 593 | return true;
|
|---|
| 594 | } else if (isObjectExpression(node) || (node == null ? void 0 : node.type) === "RecordExpression") {
|
|---|
| 595 | for (const prop of node.properties) {
|
|---|
| 596 | if (!this.isPure(prop, constantsOnly)) return false;
|
|---|
| 597 | }
|
|---|
| 598 | return true;
|
|---|
| 599 | } else if (isMethod(node)) {
|
|---|
| 600 | var _node$decorators2;
|
|---|
| 601 | if (node.computed && !this.isPure(node.key, constantsOnly)) return false;
|
|---|
| 602 | if (((_node$decorators2 = node.decorators) == null ? void 0 : _node$decorators2.length) > 0) {
|
|---|
| 603 | return false;
|
|---|
| 604 | }
|
|---|
| 605 | return true;
|
|---|
| 606 | } else if (isProperty(node)) {
|
|---|
| 607 | var _node$decorators3;
|
|---|
| 608 | if (node.computed && !this.isPure(node.key, constantsOnly)) return false;
|
|---|
| 609 | if (((_node$decorators3 = node.decorators) == null ? void 0 : _node$decorators3.length) > 0) {
|
|---|
| 610 | return false;
|
|---|
| 611 | }
|
|---|
| 612 | if (isObjectProperty(node) || node.static) {
|
|---|
| 613 | if (node.value !== null && !this.isPure(node.value, constantsOnly)) {
|
|---|
| 614 | return false;
|
|---|
| 615 | }
|
|---|
| 616 | }
|
|---|
| 617 | return true;
|
|---|
| 618 | } else if (isUnaryExpression(node)) {
|
|---|
| 619 | return this.isPure(node.argument, constantsOnly);
|
|---|
| 620 | } else if (isTemplateLiteral(node)) {
|
|---|
| 621 | for (const expression of node.expressions) {
|
|---|
| 622 | if (!this.isPure(expression, constantsOnly)) return false;
|
|---|
| 623 | }
|
|---|
| 624 | return true;
|
|---|
| 625 | } else if (isTaggedTemplateExpression(node)) {
|
|---|
| 626 | return matchesPattern(node.tag, "String.raw") && !this.hasBinding("String", {
|
|---|
| 627 | noGlobals: true
|
|---|
| 628 | }) && this.isPure(node.quasi, constantsOnly);
|
|---|
| 629 | } else if (isMemberExpression(node)) {
|
|---|
| 630 | return !node.computed && isIdentifier(node.object) && node.object.name === "Symbol" && isIdentifier(node.property) && node.property.name !== "for" && !this.hasBinding("Symbol", {
|
|---|
| 631 | noGlobals: true
|
|---|
| 632 | });
|
|---|
| 633 | } else if (isCallExpression(node)) {
|
|---|
| 634 | return matchesPattern(node.callee, "Symbol.for") && !this.hasBinding("Symbol", {
|
|---|
| 635 | noGlobals: true
|
|---|
| 636 | }) && node.arguments.length === 1 && t.isStringLiteral(node.arguments[0]);
|
|---|
| 637 | } else {
|
|---|
| 638 | return isPureish(node);
|
|---|
| 639 | }
|
|---|
| 640 | }
|
|---|
| 641 | setData(key, val) {
|
|---|
| 642 | return this.data[key] = val;
|
|---|
| 643 | }
|
|---|
| 644 | getData(key) {
|
|---|
| 645 | let scope = this;
|
|---|
| 646 | do {
|
|---|
| 647 | const data = scope.data[key];
|
|---|
| 648 | if (data != null) return data;
|
|---|
| 649 | } while (scope = scope.parent);
|
|---|
| 650 | }
|
|---|
| 651 | removeData(key) {
|
|---|
| 652 | let scope = this;
|
|---|
| 653 | do {
|
|---|
| 654 | const data = scope.data[key];
|
|---|
| 655 | if (data != null) scope.data[key] = null;
|
|---|
| 656 | } while (scope = scope.parent);
|
|---|
| 657 | }
|
|---|
| 658 | init() {
|
|---|
| 659 | if (!this.inited) {
|
|---|
| 660 | this.inited = true;
|
|---|
| 661 | this.crawl();
|
|---|
| 662 | }
|
|---|
| 663 | }
|
|---|
| 664 | crawl() {
|
|---|
| 665 | const path = this.path;
|
|---|
| 666 | resetScope(this);
|
|---|
| 667 | this.data = Object.create(null);
|
|---|
| 668 | let scope = this;
|
|---|
| 669 | do {
|
|---|
| 670 | if (scope.crawling) return;
|
|---|
| 671 | if (scope.path.isProgram()) {
|
|---|
| 672 | break;
|
|---|
| 673 | }
|
|---|
| 674 | } while (scope = scope.parent);
|
|---|
| 675 | const programParent = scope;
|
|---|
| 676 | const state = {
|
|---|
| 677 | references: [],
|
|---|
| 678 | constantViolations: [],
|
|---|
| 679 | assignments: []
|
|---|
| 680 | };
|
|---|
| 681 | this.crawling = true;
|
|---|
| 682 | scopeVisitor || (scopeVisitor = _index.default.visitors.merge([{
|
|---|
| 683 | Scope(path) {
|
|---|
| 684 | resetScope(path.scope);
|
|---|
| 685 | }
|
|---|
| 686 | }, collectorVisitor]));
|
|---|
| 687 | if (path.type !== "Program") {
|
|---|
| 688 | const typeVisitors = scopeVisitor[path.type];
|
|---|
| 689 | if (typeVisitors) {
|
|---|
| 690 | for (const visit of typeVisitors.enter) {
|
|---|
| 691 | visit.call(state, path, state);
|
|---|
| 692 | }
|
|---|
| 693 | }
|
|---|
| 694 | }
|
|---|
| 695 | path.traverse(scopeVisitor, state);
|
|---|
| 696 | this.crawling = false;
|
|---|
| 697 | for (const path of state.assignments) {
|
|---|
| 698 | const ids = path.getAssignmentIdentifiers();
|
|---|
| 699 | for (const name of Object.keys(ids)) {
|
|---|
| 700 | if (path.scope.getBinding(name)) continue;
|
|---|
| 701 | programParent.addGlobal(ids[name]);
|
|---|
| 702 | }
|
|---|
| 703 | path.scope.registerConstantViolation(path);
|
|---|
| 704 | }
|
|---|
| 705 | for (const ref of state.references) {
|
|---|
| 706 | const binding = ref.scope.getBinding(ref.node.name);
|
|---|
| 707 | if (binding) {
|
|---|
| 708 | binding.reference(ref);
|
|---|
| 709 | } else {
|
|---|
| 710 | programParent.addGlobal(ref.node);
|
|---|
| 711 | }
|
|---|
| 712 | }
|
|---|
| 713 | for (const path of state.constantViolations) {
|
|---|
| 714 | path.scope.registerConstantViolation(path);
|
|---|
| 715 | }
|
|---|
| 716 | }
|
|---|
| 717 | push(opts) {
|
|---|
| 718 | let path = this.path;
|
|---|
| 719 | if (path.isPattern()) {
|
|---|
| 720 | path = this.getPatternParent().path;
|
|---|
| 721 | } else if (!path.isBlockStatement() && !path.isProgram()) {
|
|---|
| 722 | path = this.getBlockParent().path;
|
|---|
| 723 | }
|
|---|
| 724 | if (path.isSwitchStatement()) {
|
|---|
| 725 | path = (this.getFunctionParent() || this.getProgramParent()).path;
|
|---|
| 726 | }
|
|---|
| 727 | const {
|
|---|
| 728 | init,
|
|---|
| 729 | unique,
|
|---|
| 730 | kind = "var",
|
|---|
| 731 | id
|
|---|
| 732 | } = opts;
|
|---|
| 733 | if (!init && !unique && (kind === "var" || kind === "let") && isAnonymousFunctionExpression(path) && isCallExpression(path.parent, {
|
|---|
| 734 | callee: path.node
|
|---|
| 735 | }) && path.parent.arguments.length <= path.node.params.length && isIdentifier(id)) {
|
|---|
| 736 | path.pushContainer("params", id);
|
|---|
| 737 | path.scope.registerBinding("param", path.get("params")[path.node.params.length - 1]);
|
|---|
| 738 | return;
|
|---|
| 739 | }
|
|---|
| 740 | if (path.isLoop() || path.isCatchClause() || path.isFunction()) {
|
|---|
| 741 | path.ensureBlock();
|
|---|
| 742 | path = path.get("body");
|
|---|
| 743 | }
|
|---|
| 744 | const blockHoist = opts._blockHoist == null ? 2 : opts._blockHoist;
|
|---|
| 745 | const dataKey = `declaration:${kind}:${blockHoist}`;
|
|---|
| 746 | let declarPath = !unique && path.getData(dataKey);
|
|---|
| 747 | if (!declarPath) {
|
|---|
| 748 | const declar = variableDeclaration(kind, []);
|
|---|
| 749 | declar._blockHoist = blockHoist;
|
|---|
| 750 | [declarPath] = path.unshiftContainer("body", [declar]);
|
|---|
| 751 | if (!unique) path.setData(dataKey, declarPath);
|
|---|
| 752 | }
|
|---|
| 753 | const declarator = variableDeclarator(id, init);
|
|---|
| 754 | const len = declarPath.node.declarations.push(declarator);
|
|---|
| 755 | path.scope.registerBinding(kind, declarPath.get("declarations")[len - 1]);
|
|---|
| 756 | }
|
|---|
| 757 | getProgramParent() {
|
|---|
| 758 | let scope = this;
|
|---|
| 759 | do {
|
|---|
| 760 | if (scope.path.isProgram()) {
|
|---|
| 761 | return scope;
|
|---|
| 762 | }
|
|---|
| 763 | } while (scope = scope.parent);
|
|---|
| 764 | throw new Error("Couldn't find a Program");
|
|---|
| 765 | }
|
|---|
| 766 | getFunctionParent() {
|
|---|
| 767 | let scope = this;
|
|---|
| 768 | do {
|
|---|
| 769 | if (scope.path.isFunctionParent()) {
|
|---|
| 770 | return scope;
|
|---|
| 771 | }
|
|---|
| 772 | } while (scope = scope.parent);
|
|---|
| 773 | return null;
|
|---|
| 774 | }
|
|---|
| 775 | getBlockParent() {
|
|---|
| 776 | let scope = this;
|
|---|
| 777 | do {
|
|---|
| 778 | if (scope.path.isBlockParent()) {
|
|---|
| 779 | return scope;
|
|---|
| 780 | }
|
|---|
| 781 | } while (scope = scope.parent);
|
|---|
| 782 | throw new Error("We couldn't find a BlockStatement, For, Switch, Function, Loop or Program...");
|
|---|
| 783 | }
|
|---|
| 784 | getPatternParent() {
|
|---|
| 785 | let scope = this;
|
|---|
| 786 | do {
|
|---|
| 787 | if (!scope.path.isPattern()) {
|
|---|
| 788 | return scope.getBlockParent();
|
|---|
| 789 | }
|
|---|
| 790 | } while (scope = scope.parent.parent);
|
|---|
| 791 | throw new Error("We couldn't find a BlockStatement, For, Switch, Function, Loop or Program...");
|
|---|
| 792 | }
|
|---|
| 793 | getAllBindings() {
|
|---|
| 794 | const ids = Object.create(null);
|
|---|
| 795 | let scope = this;
|
|---|
| 796 | do {
|
|---|
| 797 | for (const key of Object.keys(scope.bindings)) {
|
|---|
| 798 | if (key in ids === false) {
|
|---|
| 799 | ids[key] = scope.bindings[key];
|
|---|
| 800 | }
|
|---|
| 801 | }
|
|---|
| 802 | scope = scope.parent;
|
|---|
| 803 | } while (scope);
|
|---|
| 804 | return ids;
|
|---|
| 805 | }
|
|---|
| 806 | bindingIdentifierEquals(name, node) {
|
|---|
| 807 | return this.getBindingIdentifier(name) === node;
|
|---|
| 808 | }
|
|---|
| 809 | getBinding(name) {
|
|---|
| 810 | let scope = this;
|
|---|
| 811 | let previousPath;
|
|---|
| 812 | do {
|
|---|
| 813 | const binding = scope.getOwnBinding(name);
|
|---|
| 814 | if (binding) {
|
|---|
| 815 | var _previousPath;
|
|---|
| 816 | if ((_previousPath = previousPath) != null && _previousPath.isPattern() && binding.kind !== "param" && binding.kind !== "local") {} else {
|
|---|
| 817 | return binding;
|
|---|
| 818 | }
|
|---|
| 819 | } else if (!binding && name === "arguments" && scope.path.isFunction() && !scope.path.isArrowFunctionExpression()) {
|
|---|
| 820 | break;
|
|---|
| 821 | }
|
|---|
| 822 | previousPath = scope.path;
|
|---|
| 823 | } while (scope = scope.parent);
|
|---|
| 824 | }
|
|---|
| 825 | getOwnBinding(name) {
|
|---|
| 826 | return this.bindings[name];
|
|---|
| 827 | }
|
|---|
| 828 | getBindingIdentifier(name) {
|
|---|
| 829 | var _this$getBinding2;
|
|---|
| 830 | return (_this$getBinding2 = this.getBinding(name)) == null ? void 0 : _this$getBinding2.identifier;
|
|---|
| 831 | }
|
|---|
| 832 | getOwnBindingIdentifier(name) {
|
|---|
| 833 | const binding = this.bindings[name];
|
|---|
| 834 | return binding == null ? void 0 : binding.identifier;
|
|---|
| 835 | }
|
|---|
| 836 | hasOwnBinding(name) {
|
|---|
| 837 | return !!this.getOwnBinding(name);
|
|---|
| 838 | }
|
|---|
| 839 | hasBinding(name, opts) {
|
|---|
| 840 | if (!name) return false;
|
|---|
| 841 | let noGlobals;
|
|---|
| 842 | let noUids;
|
|---|
| 843 | let upToScope;
|
|---|
| 844 | if (typeof opts === "object") {
|
|---|
| 845 | noGlobals = opts.noGlobals;
|
|---|
| 846 | noUids = opts.noUids;
|
|---|
| 847 | upToScope = opts.upToScope;
|
|---|
| 848 | } else if (typeof opts === "boolean") {
|
|---|
| 849 | noGlobals = opts;
|
|---|
| 850 | }
|
|---|
| 851 | let scope = this;
|
|---|
| 852 | do {
|
|---|
| 853 | if (upToScope === scope) {
|
|---|
| 854 | break;
|
|---|
| 855 | }
|
|---|
| 856 | if (scope.hasOwnBinding(name)) {
|
|---|
| 857 | return true;
|
|---|
| 858 | }
|
|---|
| 859 | } while (scope = scope.parent);
|
|---|
| 860 | if (!noUids && this.hasUid(name)) return true;
|
|---|
| 861 | if (!noGlobals && Scope.globals.includes(name)) return true;
|
|---|
| 862 | if (!noGlobals && Scope.contextVariables.includes(name)) return true;
|
|---|
| 863 | return false;
|
|---|
| 864 | }
|
|---|
| 865 | parentHasBinding(name, opts) {
|
|---|
| 866 | var _this$parent;
|
|---|
| 867 | return (_this$parent = this.parent) == null ? void 0 : _this$parent.hasBinding(name, opts);
|
|---|
| 868 | }
|
|---|
| 869 | moveBindingTo(name, scope) {
|
|---|
| 870 | const info = this.getBinding(name);
|
|---|
| 871 | if (info) {
|
|---|
| 872 | info.scope.removeOwnBinding(name);
|
|---|
| 873 | info.scope = scope;
|
|---|
| 874 | scope.bindings[name] = info;
|
|---|
| 875 | }
|
|---|
| 876 | }
|
|---|
| 877 | removeOwnBinding(name) {
|
|---|
| 878 | delete this.bindings[name];
|
|---|
| 879 | }
|
|---|
| 880 | removeBinding(name) {
|
|---|
| 881 | var _this$getBinding3;
|
|---|
| 882 | (_this$getBinding3 = this.getBinding(name)) == null || _this$getBinding3.scope.removeOwnBinding(name);
|
|---|
| 883 | let scope = this;
|
|---|
| 884 | do {
|
|---|
| 885 | if (scope.uids[name]) {
|
|---|
| 886 | scope.uids[name] = false;
|
|---|
| 887 | }
|
|---|
| 888 | } while (scope = scope.parent);
|
|---|
| 889 | }
|
|---|
| 890 | hoistVariables(emit = id => this.push({
|
|---|
| 891 | id
|
|---|
| 892 | })) {
|
|---|
| 893 | this.crawl();
|
|---|
| 894 | const seen = new Set();
|
|---|
| 895 | for (const name of Object.keys(this.bindings)) {
|
|---|
| 896 | const binding = this.bindings[name];
|
|---|
| 897 | if (!binding) continue;
|
|---|
| 898 | const {
|
|---|
| 899 | path
|
|---|
| 900 | } = binding;
|
|---|
| 901 | if (!path.isVariableDeclarator()) continue;
|
|---|
| 902 | const {
|
|---|
| 903 | parent,
|
|---|
| 904 | parentPath
|
|---|
| 905 | } = path;
|
|---|
| 906 | if (parent.kind !== "var" || seen.has(parent)) continue;
|
|---|
| 907 | seen.add(path.parent);
|
|---|
| 908 | let firstId;
|
|---|
| 909 | const init = [];
|
|---|
| 910 | for (const decl of parent.declarations) {
|
|---|
| 911 | firstId != null ? firstId : firstId = decl.id;
|
|---|
| 912 | if (decl.init) {
|
|---|
| 913 | init.push(assignmentExpression("=", decl.id, decl.init));
|
|---|
| 914 | }
|
|---|
| 915 | const ids = Object.keys(getBindingIdentifiers(decl, false, true, true));
|
|---|
| 916 | for (const name of ids) {
|
|---|
| 917 | emit(identifier(name), decl.init != null);
|
|---|
| 918 | }
|
|---|
| 919 | }
|
|---|
| 920 | if (parentPath.parentPath.isForXStatement({
|
|---|
| 921 | left: parent
|
|---|
| 922 | })) {
|
|---|
| 923 | parentPath.replaceWith(firstId);
|
|---|
| 924 | } else if (init.length === 0) {
|
|---|
| 925 | parentPath.remove();
|
|---|
| 926 | } else {
|
|---|
| 927 | const expr = init.length === 1 ? init[0] : sequenceExpression(init);
|
|---|
| 928 | if (parentPath.parentPath.isForStatement({
|
|---|
| 929 | init: parent
|
|---|
| 930 | })) {
|
|---|
| 931 | parentPath.replaceWith(expr);
|
|---|
| 932 | } else {
|
|---|
| 933 | parentPath.replaceWith(expressionStatement(expr));
|
|---|
| 934 | }
|
|---|
| 935 | }
|
|---|
| 936 | }
|
|---|
| 937 | }
|
|---|
| 938 | }
|
|---|
| 939 | exports.default = Scope;
|
|---|
| 940 | Scope.globals = [...globalsBuiltinLower, ...globalsBuiltinUpper];
|
|---|
| 941 | Scope.contextVariables = ["arguments", "undefined", "Infinity", "NaN"];
|
|---|
| 942 | Scope.prototype._renameFromMap = function _renameFromMap(map, oldName, newName, value) {
|
|---|
| 943 | if (map[oldName]) {
|
|---|
| 944 | map[newName] = value;
|
|---|
| 945 | map[oldName] = null;
|
|---|
| 946 | }
|
|---|
| 947 | };
|
|---|
| 948 | Scope.prototype.traverse = function (node, opts, state) {
|
|---|
| 949 | (0, _index.default)(node, opts, this, state, this.path);
|
|---|
| 950 | };
|
|---|
| 951 | Scope.prototype._generateUid = function _generateUid(name, i) {
|
|---|
| 952 | let id = name;
|
|---|
| 953 | if (i > 1) id += i;
|
|---|
| 954 | return `_${id}`;
|
|---|
| 955 | };
|
|---|
| 956 | Scope.prototype.toArray = function toArray(node, i, arrayLikeIsIterable) {
|
|---|
| 957 | if (isIdentifier(node)) {
|
|---|
| 958 | const binding = this.getBinding(node.name);
|
|---|
| 959 | if (binding != null && binding.constant && binding.path.isGenericType("Array")) {
|
|---|
| 960 | return node;
|
|---|
| 961 | }
|
|---|
| 962 | }
|
|---|
| 963 | if (isArrayExpression(node)) {
|
|---|
| 964 | return node;
|
|---|
| 965 | }
|
|---|
| 966 | if (isIdentifier(node, {
|
|---|
| 967 | name: "arguments"
|
|---|
| 968 | })) {
|
|---|
| 969 | return callExpression(memberExpression(memberExpression(memberExpression(identifier("Array"), identifier("prototype")), identifier("slice")), identifier("call")), [node]);
|
|---|
| 970 | }
|
|---|
| 971 | let helperName;
|
|---|
| 972 | const args = [node];
|
|---|
| 973 | if (i === true) {
|
|---|
| 974 | helperName = "toConsumableArray";
|
|---|
| 975 | } else if (typeof i === "number") {
|
|---|
| 976 | args.push(numericLiteral(i));
|
|---|
| 977 | helperName = "slicedToArray";
|
|---|
| 978 | } else {
|
|---|
| 979 | helperName = "toArray";
|
|---|
| 980 | }
|
|---|
| 981 | if (arrayLikeIsIterable) {
|
|---|
| 982 | args.unshift(this.path.hub.addHelper(helperName));
|
|---|
| 983 | helperName = "maybeArrayLike";
|
|---|
| 984 | }
|
|---|
| 985 | return callExpression(this.path.hub.addHelper(helperName), args);
|
|---|
| 986 | };
|
|---|
| 987 | Scope.prototype.getAllBindingsOfKind = function getAllBindingsOfKind(...kinds) {
|
|---|
| 988 | const ids = Object.create(null);
|
|---|
| 989 | for (const kind of kinds) {
|
|---|
| 990 | let scope = this;
|
|---|
| 991 | do {
|
|---|
| 992 | for (const name of Object.keys(scope.bindings)) {
|
|---|
| 993 | const binding = scope.bindings[name];
|
|---|
| 994 | if (binding.kind === kind) ids[name] = binding;
|
|---|
| 995 | }
|
|---|
| 996 | scope = scope.parent;
|
|---|
| 997 | } while (scope);
|
|---|
| 998 | }
|
|---|
| 999 | return ids;
|
|---|
| 1000 | };
|
|---|
| 1001 | Object.defineProperties(Scope.prototype, {
|
|---|
| 1002 | parentBlock: {
|
|---|
| 1003 | configurable: true,
|
|---|
| 1004 | enumerable: true,
|
|---|
| 1005 | get() {
|
|---|
| 1006 | return this.path.parent;
|
|---|
| 1007 | }
|
|---|
| 1008 | },
|
|---|
| 1009 | hub: {
|
|---|
| 1010 | configurable: true,
|
|---|
| 1011 | enumerable: true,
|
|---|
| 1012 | get() {
|
|---|
| 1013 | return this.path.hub;
|
|---|
| 1014 | }
|
|---|
| 1015 | }
|
|---|
| 1016 | });
|
|---|
| 1017 |
|
|---|
| 1018 | //# sourceMappingURL=index.js.map
|
|---|
