| 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.arrowFunctionToExpression = arrowFunctionToExpression;
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| 7 | exports.ensureBlock = ensureBlock;
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| 8 | exports.ensureFunctionName = ensureFunctionName;
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| 9 | exports.splitExportDeclaration = splitExportDeclaration;
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| 10 | exports.toComputedKey = toComputedKey;
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| 11 | exports.unwrapFunctionEnvironment = unwrapFunctionEnvironment;
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| 12 | var _t = require("@babel/types");
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| 13 | var _template = require("@babel/template");
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| 14 | var _visitors = require("../visitors.js");
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| 15 | var _context = require("./context.js");
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| 16 | const {
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| 17 | arrowFunctionExpression,
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| 18 | assignmentExpression,
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| 19 | binaryExpression,
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| 20 | blockStatement,
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| 21 | callExpression,
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| 22 | conditionalExpression,
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| 23 | expressionStatement,
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| 24 | identifier,
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| 25 | isIdentifier,
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| 26 | jsxIdentifier,
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| 27 | logicalExpression,
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| 28 | LOGICAL_OPERATORS,
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| 29 | memberExpression,
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| 30 | metaProperty,
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| 31 | numericLiteral,
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| 32 | objectExpression,
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| 33 | restElement,
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| 34 | returnStatement,
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| 35 | sequenceExpression,
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| 36 | spreadElement,
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| 37 | stringLiteral,
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| 38 | super: _super,
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| 39 | thisExpression,
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| 40 | toExpression,
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| 41 | unaryExpression,
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| 42 | toBindingIdentifierName,
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| 43 | isFunction,
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| 44 | isAssignmentPattern,
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| 45 | isRestElement,
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| 46 | getFunctionName,
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| 47 | cloneNode,
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| 48 | variableDeclaration,
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| 49 | variableDeclarator,
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| 50 | exportNamedDeclaration,
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| 51 | exportSpecifier,
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| 52 | inherits
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| 53 | } = _t;
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| 54 | function toComputedKey() {
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| 55 | let key;
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| 56 | if (this.isMemberExpression()) {
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| 57 | key = this.node.property;
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| 58 | } else if (this.isProperty() || this.isMethod()) {
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| 59 | key = this.node.key;
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| 60 | } else {
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| 61 | throw new ReferenceError("todo");
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| 62 | }
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| 63 | if (!this.node.computed) {
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| 64 | if (isIdentifier(key)) key = stringLiteral(key.name);
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| 65 | }
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| 66 | return key;
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| 67 | }
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| 68 | function ensureBlock() {
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| 69 | const body = this.get("body");
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| 70 | const bodyNode = body.node;
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| 71 | if (Array.isArray(body)) {
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| 72 | throw new Error("Can't convert array path to a block statement");
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| 73 | }
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| 74 | if (!bodyNode) {
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| 75 | throw new Error("Can't convert node without a body");
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| 76 | }
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| 77 | if (body.isBlockStatement()) {
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| 78 | return bodyNode;
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| 79 | }
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| 80 | const statements = [];
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| 81 | let stringPath = "body";
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| 82 | let key;
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| 83 | let listKey;
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| 84 | if (body.isStatement()) {
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| 85 | listKey = "body";
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| 86 | key = 0;
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| 87 | statements.push(body.node);
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| 88 | } else {
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| 89 | stringPath += ".body.0";
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| 90 | if (this.isFunction()) {
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| 91 | key = "argument";
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| 92 | statements.push(returnStatement(body.node));
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| 93 | } else {
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| 94 | key = "expression";
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| 95 | statements.push(expressionStatement(body.node));
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| 96 | }
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| 97 | }
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| 98 | this.node.body = blockStatement(statements);
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| 99 | const parentPath = this.get(stringPath);
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| 100 | _context.setup.call(body, parentPath, listKey ? parentPath.node[listKey] : parentPath.node, listKey, key);
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| 101 | return this.node;
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| 102 | }
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| 103 | exports.arrowFunctionToShadowed = function () {
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| 104 | if (!this.isArrowFunctionExpression()) return;
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| 105 | this.arrowFunctionToExpression();
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| 106 | };
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| 107 | function unwrapFunctionEnvironment() {
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| 108 | if (!this.isArrowFunctionExpression() && !this.isFunctionExpression() && !this.isFunctionDeclaration()) {
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| 109 | throw this.buildCodeFrameError("Can only unwrap the environment of a function.");
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| 110 | }
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| 111 | hoistFunctionEnvironment(this);
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| 112 | }
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| 113 | function setType(path, type) {
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| 114 | path.node.type = type;
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| 115 | }
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| 116 | function arrowFunctionToExpression({
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| 117 | allowInsertArrow = true,
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| 118 | allowInsertArrowWithRest = allowInsertArrow,
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| 119 | noNewArrows = !(_arguments$ => (_arguments$ = arguments[0]) == null ? void 0 : _arguments$.specCompliant)()
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| 120 | } = {}) {
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| 121 | if (!this.isArrowFunctionExpression()) {
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| 122 | throw this.buildCodeFrameError("Cannot convert non-arrow function to a function expression.");
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| 123 | }
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| 124 | let self = this;
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| 125 | if (!noNewArrows) {
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| 126 | var _self$ensureFunctionN;
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| 127 | self = (_self$ensureFunctionN = self.ensureFunctionName(false)) != null ? _self$ensureFunctionN : self;
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| 128 | }
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| 129 | const {
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| 130 | thisBinding,
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| 131 | fnPath: fn
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| 132 | } = hoistFunctionEnvironment(self, noNewArrows, allowInsertArrow, allowInsertArrowWithRest);
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| 133 | fn.ensureBlock();
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| 134 | setType(fn, "FunctionExpression");
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| 135 | if (!noNewArrows) {
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| 136 | const checkBinding = thisBinding ? null : fn.scope.generateUidIdentifier("arrowCheckId");
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| 137 | if (checkBinding) {
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| 138 | fn.parentPath.scope.push({
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| 139 | id: checkBinding,
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| 140 | init: objectExpression([])
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| 141 | });
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| 142 | }
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| 143 | fn.get("body").unshiftContainer("body", expressionStatement(callExpression(this.hub.addHelper("newArrowCheck"), [thisExpression(), checkBinding ? identifier(checkBinding.name) : identifier(thisBinding)])));
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| 144 | fn.replaceWith(callExpression(memberExpression(fn.node, identifier("bind")), [checkBinding ? identifier(checkBinding.name) : thisExpression()]));
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| 145 | return fn.get("callee.object");
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| 146 | }
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| 147 | return fn;
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| 148 | }
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| 149 | const getSuperCallsVisitor = (0, _visitors.environmentVisitor)({
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| 150 | CallExpression(child, {
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| 151 | allSuperCalls
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| 152 | }) {
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| 153 | if (!child.get("callee").isSuper()) return;
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| 154 | allSuperCalls.push(child);
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| 155 | }
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| 156 | });
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| 157 | function hoistFunctionEnvironment(fnPath, noNewArrows = true, allowInsertArrow = true, allowInsertArrowWithRest = true) {
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| 158 | let arrowParent;
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| 159 | let thisEnvFn = fnPath.findParent(p => {
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| 160 | if (p.isArrowFunctionExpression()) {
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| 161 | arrowParent != null ? arrowParent : arrowParent = p;
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| 162 | return false;
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| 163 | }
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| 164 | return p.isFunction() || p.isProgram() || p.isClassProperty({
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| 165 | static: false
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| 166 | }) || p.isClassPrivateProperty({
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| 167 | static: false
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| 168 | });
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| 169 | });
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| 170 | const inConstructor = thisEnvFn.isClassMethod({
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| 171 | kind: "constructor"
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| 172 | });
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| 173 | if (thisEnvFn.isClassProperty() || thisEnvFn.isClassPrivateProperty()) {
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| 174 | if (arrowParent) {
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| 175 | thisEnvFn = arrowParent;
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| 176 | } else if (allowInsertArrow) {
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| 177 | fnPath.replaceWith(callExpression(arrowFunctionExpression([], toExpression(fnPath.node)), []));
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| 178 | thisEnvFn = fnPath.get("callee");
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| 179 | fnPath = thisEnvFn.get("body");
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| 180 | } else {
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| 181 | throw fnPath.buildCodeFrameError("Unable to transform arrow inside class property");
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| 182 | }
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| 183 | }
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| 184 | const {
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| 185 | thisPaths,
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| 186 | argumentsPaths,
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| 187 | newTargetPaths,
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| 188 | superProps,
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| 189 | superCalls
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| 190 | } = getScopeInformation(fnPath);
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| 191 | if (inConstructor && superCalls.length > 0) {
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| 192 | if (!allowInsertArrow) {
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| 193 | throw superCalls[0].buildCodeFrameError("When using '@babel/plugin-transform-arrow-functions', " + "it's not possible to compile `super()` in an arrow function without compiling classes.\n" + "Please add '@babel/plugin-transform-classes' to your Babel configuration.");
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| 194 | }
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| 195 | if (!allowInsertArrowWithRest) {
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| 196 | throw superCalls[0].buildCodeFrameError("When using '@babel/plugin-transform-parameters', " + "it's not possible to compile `super()` in an arrow function with default or rest parameters without compiling classes.\n" + "Please add '@babel/plugin-transform-classes' to your Babel configuration.");
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| 197 | }
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| 198 | const allSuperCalls = [];
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| 199 | thisEnvFn.traverse(getSuperCallsVisitor, {
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| 200 | allSuperCalls
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| 201 | });
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| 202 | const superBinding = getSuperBinding(thisEnvFn);
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| 203 | allSuperCalls.forEach(superCall => {
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| 204 | const callee = identifier(superBinding);
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| 205 | callee.loc = superCall.node.callee.loc;
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| 206 | superCall.get("callee").replaceWith(callee);
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| 207 | });
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| 208 | }
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| 209 | if (argumentsPaths.length > 0) {
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| 210 | const argumentsBinding = getBinding(thisEnvFn, "arguments", () => {
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| 211 | const args = () => identifier("arguments");
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| 212 | if (thisEnvFn.scope.path.isProgram()) {
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| 213 | return conditionalExpression(binaryExpression("===", unaryExpression("typeof", args()), stringLiteral("undefined")), thisEnvFn.scope.buildUndefinedNode(), args());
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| 214 | } else {
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| 215 | return args();
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| 216 | }
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| 217 | });
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| 218 | argumentsPaths.forEach(argumentsChild => {
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| 219 | const argsRef = identifier(argumentsBinding);
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| 220 | argsRef.loc = argumentsChild.node.loc;
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| 221 | argumentsChild.replaceWith(argsRef);
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| 222 | });
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| 223 | }
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| 224 | if (newTargetPaths.length > 0) {
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| 225 | const newTargetBinding = getBinding(thisEnvFn, "newtarget", () => metaProperty(identifier("new"), identifier("target")));
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| 226 | newTargetPaths.forEach(targetChild => {
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| 227 | const targetRef = identifier(newTargetBinding);
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| 228 | targetRef.loc = targetChild.node.loc;
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| 229 | targetChild.replaceWith(targetRef);
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| 230 | });
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| 231 | }
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| 232 | if (superProps.length > 0) {
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| 233 | if (!allowInsertArrow) {
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| 234 | throw superProps[0].buildCodeFrameError("When using '@babel/plugin-transform-arrow-functions', " + "it's not possible to compile `super.prop` in an arrow function without compiling classes.\n" + "Please add '@babel/plugin-transform-classes' to your Babel configuration.");
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| 235 | }
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| 236 | const flatSuperProps = superProps.reduce((acc, superProp) => acc.concat(standardizeSuperProperty(superProp)), []);
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| 237 | flatSuperProps.forEach(superProp => {
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| 238 | const key = superProp.node.computed ? "" : superProp.get("property").node.name;
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| 239 | const superParentPath = superProp.parentPath;
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| 240 | const isAssignment = superParentPath.isAssignmentExpression({
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| 241 | left: superProp.node
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| 242 | });
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| 243 | const isCall = superParentPath.isCallExpression({
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| 244 | callee: superProp.node
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| 245 | });
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| 246 | const isTaggedTemplate = superParentPath.isTaggedTemplateExpression({
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| 247 | tag: superProp.node
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| 248 | });
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| 249 | const superBinding = getSuperPropBinding(thisEnvFn, isAssignment, key);
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| 250 | const args = [];
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| 251 | if (superProp.node.computed) {
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| 252 | args.push(superProp.get("property").node);
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| 253 | }
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| 254 | if (isAssignment) {
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| 255 | const value = superParentPath.node.right;
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| 256 | args.push(value);
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| 257 | }
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| 258 | const call = callExpression(identifier(superBinding), args);
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| 259 | if (isCall) {
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| 260 | superParentPath.unshiftContainer("arguments", thisExpression());
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| 261 | superProp.replaceWith(memberExpression(call, identifier("call")));
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| 262 | thisPaths.push(superParentPath.get("arguments.0"));
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| 263 | } else if (isAssignment) {
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| 264 | superParentPath.replaceWith(call);
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| 265 | } else if (isTaggedTemplate) {
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| 266 | superProp.replaceWith(callExpression(memberExpression(call, identifier("bind"), false), [thisExpression()]));
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| 267 | thisPaths.push(superProp.get("arguments.0"));
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| 268 | } else {
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| 269 | superProp.replaceWith(call);
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| 270 | }
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| 271 | });
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| 272 | }
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| 273 | let thisBinding;
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| 274 | if (thisPaths.length > 0 || !noNewArrows) {
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| 275 | thisBinding = getThisBinding(thisEnvFn, inConstructor);
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| 276 | if (noNewArrows || inConstructor && hasSuperClass(thisEnvFn)) {
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| 277 | thisPaths.forEach(thisChild => {
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| 278 | const thisRef = thisChild.isJSX() ? jsxIdentifier(thisBinding) : identifier(thisBinding);
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| 279 | thisRef.loc = thisChild.node.loc;
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| 280 | thisChild.replaceWith(thisRef);
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| 281 | });
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| 282 | if (!noNewArrows) thisBinding = null;
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| 283 | }
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| 284 | }
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| 285 | return {
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| 286 | thisBinding: thisBinding,
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| 287 | fnPath
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| 288 | };
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| 289 | }
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| 290 | function isLogicalOp(op) {
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| 291 | return LOGICAL_OPERATORS.includes(op);
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| 292 | }
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| 293 | function standardizeSuperProperty(superProp) {
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| 294 | if (superProp.parentPath.isAssignmentExpression() && superProp.parentPath.node.operator !== "=") {
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| 295 | const assignmentPath = superProp.parentPath;
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| 296 | const op = assignmentPath.node.operator.slice(0, -1);
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| 297 | const value = assignmentPath.node.right;
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| 298 | const isLogicalAssignment = isLogicalOp(op);
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| 299 | if (superProp.node.computed) {
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| 300 | const tmp = superProp.scope.generateDeclaredUidIdentifier("tmp");
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| 301 | const {
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| 302 | object,
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| 303 | property
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| 304 | } = superProp.node;
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| 305 | assignmentPath.get("left").replaceWith(memberExpression(object, assignmentExpression("=", tmp, property), true));
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| 306 | assignmentPath.get("right").replaceWith(rightExpression(isLogicalAssignment ? "=" : op, memberExpression(object, identifier(tmp.name), true), value));
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| 307 | } else {
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| 308 | const object = superProp.node.object;
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| 309 | const property = superProp.node.property;
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| 310 | assignmentPath.get("left").replaceWith(memberExpression(object, property));
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| 311 | assignmentPath.get("right").replaceWith(rightExpression(isLogicalAssignment ? "=" : op, memberExpression(object, identifier(property.name)), value));
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| 312 | }
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| 313 | if (isLogicalAssignment) {
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| 314 | assignmentPath.replaceWith(logicalExpression(op, assignmentPath.node.left, assignmentPath.node.right));
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| 315 | } else {
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| 316 | assignmentPath.node.operator = "=";
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| 317 | }
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| 318 | return [assignmentPath.get("left"), assignmentPath.get("right").get("left")];
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| 319 | } else if (superProp.parentPath.isUpdateExpression()) {
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| 320 | const updateExpr = superProp.parentPath;
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| 321 | const tmp = superProp.scope.generateDeclaredUidIdentifier("tmp");
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| 322 | const computedKey = superProp.node.computed ? superProp.scope.generateDeclaredUidIdentifier("prop") : null;
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| 323 | const parts = [assignmentExpression("=", tmp, memberExpression(superProp.node.object, computedKey ? assignmentExpression("=", computedKey, superProp.node.property) : superProp.node.property, superProp.node.computed)), assignmentExpression("=", memberExpression(superProp.node.object, computedKey ? identifier(computedKey.name) : superProp.node.property, superProp.node.computed), binaryExpression(superProp.parentPath.node.operator[0], identifier(tmp.name), numericLiteral(1)))];
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| 324 | if (!superProp.parentPath.node.prefix) {
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| 325 | parts.push(identifier(tmp.name));
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| 326 | }
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| 327 | updateExpr.replaceWith(sequenceExpression(parts));
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| 328 | const left = updateExpr.get("expressions.0.right");
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| 329 | const right = updateExpr.get("expressions.1.left");
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| 330 | return [left, right];
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| 331 | }
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| 332 | return [superProp];
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| 333 | function rightExpression(op, left, right) {
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| 334 | if (op === "=") {
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| 335 | return assignmentExpression("=", left, right);
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| 336 | } else {
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| 337 | return binaryExpression(op, left, right);
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| 338 | }
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| 339 | }
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| 340 | }
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| 341 | function hasSuperClass(thisEnvFn) {
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| 342 | return thisEnvFn.isClassMethod() && !!thisEnvFn.parentPath.parentPath.node.superClass;
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| 343 | }
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| 344 | const assignSuperThisVisitor = (0, _visitors.environmentVisitor)({
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| 345 | CallExpression(child, {
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| 346 | supers,
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| 347 | thisBinding
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| 348 | }) {
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| 349 | if (!child.get("callee").isSuper()) return;
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| 350 | if (supers.has(child.node)) return;
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| 351 | supers.add(child.node);
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| 352 | child.replaceWithMultiple([child.node, assignmentExpression("=", identifier(thisBinding), identifier("this"))]);
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| 353 | }
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| 354 | });
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| 355 | function getThisBinding(thisEnvFn, inConstructor) {
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| 356 | return getBinding(thisEnvFn, "this", thisBinding => {
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| 357 | if (!inConstructor || !hasSuperClass(thisEnvFn)) return thisExpression();
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| 358 | thisEnvFn.traverse(assignSuperThisVisitor, {
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| 359 | supers: new WeakSet(),
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| 360 | thisBinding
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| 361 | });
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| 362 | });
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| 363 | }
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| 364 | function getSuperBinding(thisEnvFn) {
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| 365 | return getBinding(thisEnvFn, "supercall", () => {
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| 366 | const argsBinding = thisEnvFn.scope.generateUidIdentifier("args");
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| 367 | return arrowFunctionExpression([restElement(argsBinding)], callExpression(_super(), [spreadElement(identifier(argsBinding.name))]));
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| 368 | });
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| 369 | }
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| 370 | function getSuperPropBinding(thisEnvFn, isAssignment, propName) {
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| 371 | const op = isAssignment ? "set" : "get";
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| 372 | return getBinding(thisEnvFn, `superprop_${op}:${propName || ""}`, () => {
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| 373 | const argsList = [];
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| 374 | let fnBody;
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| 375 | if (propName) {
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| 376 | fnBody = memberExpression(_super(), identifier(propName));
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| 377 | } else {
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| 378 | const method = thisEnvFn.scope.generateUidIdentifier("prop");
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| 379 | argsList.unshift(method);
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| 380 | fnBody = memberExpression(_super(), identifier(method.name), true);
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| 381 | }
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| 382 | if (isAssignment) {
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| 383 | const valueIdent = thisEnvFn.scope.generateUidIdentifier("value");
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| 384 | argsList.push(valueIdent);
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| 385 | fnBody = assignmentExpression("=", fnBody, identifier(valueIdent.name));
|
|---|
| 386 | }
|
|---|
| 387 | return arrowFunctionExpression(argsList, fnBody);
|
|---|
| 388 | });
|
|---|
| 389 | }
|
|---|
| 390 | function getBinding(thisEnvFn, key, init) {
|
|---|
| 391 | const cacheKey = "binding:" + key;
|
|---|
| 392 | let data = thisEnvFn.getData(cacheKey);
|
|---|
| 393 | if (!data) {
|
|---|
| 394 | const id = thisEnvFn.scope.generateUidIdentifier(key);
|
|---|
| 395 | data = id.name;
|
|---|
| 396 | thisEnvFn.setData(cacheKey, data);
|
|---|
| 397 | thisEnvFn.scope.push({
|
|---|
| 398 | id: id,
|
|---|
| 399 | init: init(data)
|
|---|
| 400 | });
|
|---|
| 401 | }
|
|---|
| 402 | return data;
|
|---|
| 403 | }
|
|---|
| 404 | const getScopeInformationVisitor = (0, _visitors.environmentVisitor)({
|
|---|
| 405 | ThisExpression(child, {
|
|---|
| 406 | thisPaths
|
|---|
| 407 | }) {
|
|---|
| 408 | thisPaths.push(child);
|
|---|
| 409 | },
|
|---|
| 410 | JSXIdentifier(child, {
|
|---|
| 411 | thisPaths
|
|---|
| 412 | }) {
|
|---|
| 413 | if (child.node.name !== "this") return;
|
|---|
| 414 | if (!child.parentPath.isJSXMemberExpression({
|
|---|
| 415 | object: child.node
|
|---|
| 416 | }) && !child.parentPath.isJSXOpeningElement({
|
|---|
| 417 | name: child.node
|
|---|
| 418 | })) {
|
|---|
| 419 | return;
|
|---|
| 420 | }
|
|---|
| 421 | thisPaths.push(child);
|
|---|
| 422 | },
|
|---|
| 423 | CallExpression(child, {
|
|---|
| 424 | superCalls
|
|---|
| 425 | }) {
|
|---|
| 426 | if (child.get("callee").isSuper()) superCalls.push(child);
|
|---|
| 427 | },
|
|---|
| 428 | MemberExpression(child, {
|
|---|
| 429 | superProps
|
|---|
| 430 | }) {
|
|---|
| 431 | if (child.get("object").isSuper()) superProps.push(child);
|
|---|
| 432 | },
|
|---|
| 433 | Identifier(child, {
|
|---|
| 434 | argumentsPaths
|
|---|
| 435 | }) {
|
|---|
| 436 | if (!child.isReferencedIdentifier({
|
|---|
| 437 | name: "arguments"
|
|---|
| 438 | })) return;
|
|---|
| 439 | let curr = child.scope;
|
|---|
| 440 | do {
|
|---|
| 441 | if (curr.hasOwnBinding("arguments")) {
|
|---|
| 442 | curr.rename("arguments");
|
|---|
| 443 | return;
|
|---|
| 444 | }
|
|---|
| 445 | if (curr.path.isFunction() && !curr.path.isArrowFunctionExpression()) {
|
|---|
| 446 | break;
|
|---|
| 447 | }
|
|---|
| 448 | } while (curr = curr.parent);
|
|---|
| 449 | argumentsPaths.push(child);
|
|---|
| 450 | },
|
|---|
| 451 | MetaProperty(child, {
|
|---|
| 452 | newTargetPaths
|
|---|
| 453 | }) {
|
|---|
| 454 | if (!child.get("meta").isIdentifier({
|
|---|
| 455 | name: "new"
|
|---|
| 456 | })) return;
|
|---|
| 457 | if (!child.get("property").isIdentifier({
|
|---|
| 458 | name: "target"
|
|---|
| 459 | })) return;
|
|---|
| 460 | newTargetPaths.push(child);
|
|---|
| 461 | }
|
|---|
| 462 | });
|
|---|
| 463 | function getScopeInformation(fnPath) {
|
|---|
| 464 | const thisPaths = [];
|
|---|
| 465 | const argumentsPaths = [];
|
|---|
| 466 | const newTargetPaths = [];
|
|---|
| 467 | const superProps = [];
|
|---|
| 468 | const superCalls = [];
|
|---|
| 469 | fnPath.traverse(getScopeInformationVisitor, {
|
|---|
| 470 | thisPaths,
|
|---|
| 471 | argumentsPaths,
|
|---|
| 472 | newTargetPaths,
|
|---|
| 473 | superProps,
|
|---|
| 474 | superCalls
|
|---|
| 475 | });
|
|---|
| 476 | return {
|
|---|
| 477 | thisPaths,
|
|---|
| 478 | argumentsPaths,
|
|---|
| 479 | newTargetPaths,
|
|---|
| 480 | superProps,
|
|---|
| 481 | superCalls
|
|---|
| 482 | };
|
|---|
| 483 | }
|
|---|
| 484 | function splitExportDeclaration() {
|
|---|
| 485 | if (!this.isExportDeclaration() || this.isExportAllDeclaration()) {
|
|---|
| 486 | throw new Error("Only default and named export declarations can be split.");
|
|---|
| 487 | }
|
|---|
| 488 | if (this.isExportNamedDeclaration() && this.get("specifiers").length > 0) {
|
|---|
| 489 | throw new Error("It doesn't make sense to split exported specifiers.");
|
|---|
| 490 | }
|
|---|
| 491 | const declaration = this.get("declaration");
|
|---|
| 492 | if (this.isExportDefaultDeclaration()) {
|
|---|
| 493 | const standaloneDeclaration = declaration.isFunctionDeclaration() || declaration.isClassDeclaration();
|
|---|
| 494 | const exportExpr = declaration.isFunctionExpression() || declaration.isClassExpression();
|
|---|
| 495 | const scope = declaration.isScope() ? declaration.scope.parent : declaration.scope;
|
|---|
| 496 | let id = declaration.node.id;
|
|---|
| 497 | let needBindingRegistration = false;
|
|---|
| 498 | if (!id) {
|
|---|
| 499 | needBindingRegistration = true;
|
|---|
| 500 | id = scope.generateUidIdentifier("default");
|
|---|
| 501 | if (standaloneDeclaration || exportExpr) {
|
|---|
| 502 | declaration.node.id = cloneNode(id);
|
|---|
| 503 | }
|
|---|
| 504 | } else if (exportExpr && scope.hasBinding(id.name)) {
|
|---|
| 505 | needBindingRegistration = true;
|
|---|
| 506 | id = scope.generateUidIdentifier(id.name);
|
|---|
| 507 | }
|
|---|
| 508 | const updatedDeclaration = standaloneDeclaration ? declaration.node : variableDeclaration("var", [variableDeclarator(cloneNode(id), declaration.node)]);
|
|---|
| 509 | const updatedExportDeclaration = exportNamedDeclaration(null, [exportSpecifier(cloneNode(id), identifier("default"))]);
|
|---|
| 510 | this.insertAfter(updatedExportDeclaration);
|
|---|
| 511 | this.replaceWith(updatedDeclaration);
|
|---|
| 512 | if (needBindingRegistration) {
|
|---|
| 513 | scope.registerDeclaration(this);
|
|---|
| 514 | }
|
|---|
| 515 | return this;
|
|---|
| 516 | } else if (this.get("specifiers").length > 0) {
|
|---|
| 517 | throw new Error("It doesn't make sense to split exported specifiers.");
|
|---|
| 518 | }
|
|---|
| 519 | const bindingIdentifiers = declaration.getOuterBindingIdentifiers();
|
|---|
| 520 | const specifiers = Object.keys(bindingIdentifiers).map(name => {
|
|---|
| 521 | return exportSpecifier(identifier(name), identifier(name));
|
|---|
| 522 | });
|
|---|
| 523 | const aliasDeclar = exportNamedDeclaration(null, specifiers);
|
|---|
| 524 | this.insertAfter(aliasDeclar);
|
|---|
| 525 | this.replaceWith(declaration.node);
|
|---|
| 526 | return this;
|
|---|
| 527 | }
|
|---|
| 528 | const refersOuterBindingVisitor = {
|
|---|
| 529 | "ReferencedIdentifier|BindingIdentifier"(path, state) {
|
|---|
| 530 | if (path.node.name !== state.name) return;
|
|---|
| 531 | state.needsRename = true;
|
|---|
| 532 | path.stop();
|
|---|
| 533 | },
|
|---|
| 534 | Scope(path, state) {
|
|---|
| 535 | if (path.scope.hasOwnBinding(state.name)) {
|
|---|
| 536 | path.skip();
|
|---|
| 537 | }
|
|---|
| 538 | }
|
|---|
| 539 | };
|
|---|
| 540 | function ensureFunctionName(supportUnicodeId) {
|
|---|
| 541 | if (this.node.id) return this;
|
|---|
| 542 | const res = getFunctionName(this.node, this.parent);
|
|---|
| 543 | if (res == null) return this;
|
|---|
| 544 | let {
|
|---|
| 545 | name
|
|---|
| 546 | } = res;
|
|---|
| 547 | if (!supportUnicodeId && /[\uD800-\uDFFF]/.test(name)) {
|
|---|
| 548 | return null;
|
|---|
| 549 | }
|
|---|
| 550 | if (name.startsWith("get ") || name.startsWith("set ")) {
|
|---|
| 551 | return null;
|
|---|
| 552 | }
|
|---|
| 553 | name = toBindingIdentifierName(name.replace(/[/ ]/g, "_"));
|
|---|
| 554 | const id = identifier(name);
|
|---|
| 555 | inherits(id, res.originalNode);
|
|---|
| 556 | const state = {
|
|---|
| 557 | needsRename: false,
|
|---|
| 558 | name
|
|---|
| 559 | };
|
|---|
| 560 | const {
|
|---|
| 561 | scope
|
|---|
| 562 | } = this;
|
|---|
| 563 | const binding = scope.getOwnBinding(name);
|
|---|
| 564 | if (binding) {
|
|---|
| 565 | if (binding.kind === "param") {
|
|---|
| 566 | state.needsRename = true;
|
|---|
| 567 | } else {}
|
|---|
| 568 | } else if (scope.parent.hasBinding(name) || scope.hasGlobal(name)) {
|
|---|
| 569 | this.traverse(refersOuterBindingVisitor, state);
|
|---|
| 570 | }
|
|---|
| 571 | if (!state.needsRename) {
|
|---|
| 572 | this.node.id = id;
|
|---|
| 573 | scope.getProgramParent().references[id.name] = true;
|
|---|
| 574 | return this;
|
|---|
| 575 | }
|
|---|
| 576 | if (scope.hasBinding(id.name) && !scope.hasGlobal(id.name)) {
|
|---|
| 577 | scope.rename(id.name);
|
|---|
| 578 | this.node.id = id;
|
|---|
| 579 | scope.getProgramParent().references[id.name] = true;
|
|---|
| 580 | return this;
|
|---|
| 581 | }
|
|---|
| 582 | if (!isFunction(this.node)) return null;
|
|---|
| 583 | const key = scope.generateUidIdentifier(id.name);
|
|---|
| 584 | const params = [];
|
|---|
| 585 | for (let i = 0, len = getFunctionArity(this.node); i < len; i++) {
|
|---|
| 586 | params.push(scope.generateUidIdentifier("x"));
|
|---|
| 587 | }
|
|---|
| 588 | const call = _template.default.expression.ast`
|
|---|
| 589 | (function (${key}) {
|
|---|
| 590 | function ${id}(${params}) {
|
|---|
| 591 | return ${cloneNode(key)}.apply(this, arguments);
|
|---|
| 592 | }
|
|---|
| 593 |
|
|---|
| 594 | ${cloneNode(id)}.toString = function () {
|
|---|
| 595 | return ${cloneNode(key)}.toString();
|
|---|
| 596 | }
|
|---|
| 597 |
|
|---|
| 598 | return ${cloneNode(id)};
|
|---|
| 599 | })(${toExpression(this.node)})
|
|---|
| 600 | `;
|
|---|
| 601 | return this.replaceWith(call)[0].get("arguments.0");
|
|---|
| 602 | }
|
|---|
| 603 | function getFunctionArity(node) {
|
|---|
| 604 | const count = node.params.findIndex(param => isAssignmentPattern(param) || isRestElement(param));
|
|---|
| 605 | return count === -1 ? node.params.length : count;
|
|---|
| 606 | }
|
|---|
| 607 |
|
|---|
| 608 | //# sourceMappingURL=conversion.js.map
|
|---|
