| "use strict"; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| exports.default = void 0; |
| |
| var _helperPluginUtils = require("@babel/helper-plugin-utils"); |
| |
| var _core = require("@babel/core"); |
| |
| var _default = (0, _helperPluginUtils.declare)((api, options) => { |
| var _api$assumption, _options$allowArrayLi, _api$assumption2; |
| |
| api.assertVersion(7); |
| const { |
| useBuiltIns = false |
| } = options; |
| const iterableIsArray = (_api$assumption = api.assumption("iterableIsArray")) != null ? _api$assumption : options.loose; |
| const arrayLikeIsIterable = (_options$allowArrayLi = options.allowArrayLike) != null ? _options$allowArrayLi : api.assumption("arrayLikeIsIterable"); |
| const objectRestNoSymbols = (_api$assumption2 = api.assumption("objectRestNoSymbols")) != null ? _api$assumption2 : options.loose; |
| |
| function getExtendsHelper(file) { |
| return useBuiltIns ? _core.types.memberExpression(_core.types.identifier("Object"), _core.types.identifier("assign")) : file.addHelper("extends"); |
| } |
| |
| function variableDeclarationHasPattern(node) { |
| for (const declar of node.declarations) { |
| if (_core.types.isPattern(declar.id)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| function hasRest(pattern) { |
| for (const elem of pattern.elements) { |
| if (_core.types.isRestElement(elem)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| function hasObjectRest(pattern) { |
| for (const elem of pattern.properties) { |
| if (_core.types.isRestElement(elem)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| const STOP_TRAVERSAL = {}; |
| |
| const arrayUnpackVisitor = (node, ancestors, state) => { |
| if (!ancestors.length) { |
| return; |
| } |
| |
| if (_core.types.isIdentifier(node) && _core.types.isReferenced(node, ancestors[ancestors.length - 1]) && state.bindings[node.name]) { |
| state.deopt = true; |
| throw STOP_TRAVERSAL; |
| } |
| }; |
| |
| class DestructuringTransformer { |
| constructor(opts) { |
| this.blockHoist = void 0; |
| this.operator = void 0; |
| this.arrays = void 0; |
| this.nodes = void 0; |
| this.scope = void 0; |
| this.kind = void 0; |
| this.iterableIsArray = void 0; |
| this.arrayLikeIsIterable = void 0; |
| this.addHelper = void 0; |
| this.blockHoist = opts.blockHoist; |
| this.operator = opts.operator; |
| this.arrays = {}; |
| this.nodes = opts.nodes || []; |
| this.scope = opts.scope; |
| this.kind = opts.kind; |
| this.iterableIsArray = opts.iterableIsArray; |
| this.arrayLikeIsIterable = opts.arrayLikeIsIterable; |
| this.addHelper = opts.addHelper; |
| } |
| |
| buildVariableAssignment(id, init) { |
| let op = this.operator; |
| if (_core.types.isMemberExpression(id)) op = "="; |
| let node; |
| |
| if (op) { |
| node = _core.types.expressionStatement(_core.types.assignmentExpression(op, id, _core.types.cloneNode(init) || this.scope.buildUndefinedNode())); |
| } else { |
| node = _core.types.variableDeclaration(this.kind, [_core.types.variableDeclarator(id, _core.types.cloneNode(init))]); |
| } |
| |
| node._blockHoist = this.blockHoist; |
| return node; |
| } |
| |
| buildVariableDeclaration(id, init) { |
| const declar = _core.types.variableDeclaration("var", [_core.types.variableDeclarator(_core.types.cloneNode(id), _core.types.cloneNode(init))]); |
| |
| declar._blockHoist = this.blockHoist; |
| return declar; |
| } |
| |
| push(id, _init) { |
| const init = _core.types.cloneNode(_init); |
| |
| if (_core.types.isObjectPattern(id)) { |
| this.pushObjectPattern(id, init); |
| } else if (_core.types.isArrayPattern(id)) { |
| this.pushArrayPattern(id, init); |
| } else if (_core.types.isAssignmentPattern(id)) { |
| this.pushAssignmentPattern(id, init); |
| } else { |
| this.nodes.push(this.buildVariableAssignment(id, init)); |
| } |
| } |
| |
| toArray(node, count) { |
| if (this.iterableIsArray || _core.types.isIdentifier(node) && this.arrays[node.name]) { |
| return node; |
| } else { |
| return this.scope.toArray(node, count, this.arrayLikeIsIterable); |
| } |
| } |
| |
| pushAssignmentPattern({ |
| left, |
| right |
| }, valueRef) { |
| const tempId = this.scope.generateUidIdentifierBasedOnNode(valueRef); |
| this.nodes.push(this.buildVariableDeclaration(tempId, valueRef)); |
| |
| const tempConditional = _core.types.conditionalExpression(_core.types.binaryExpression("===", _core.types.cloneNode(tempId), this.scope.buildUndefinedNode()), right, _core.types.cloneNode(tempId)); |
| |
| if (_core.types.isPattern(left)) { |
| let patternId; |
| let node; |
| |
| if (this.kind === "const" || this.kind === "let") { |
| patternId = this.scope.generateUidIdentifier(tempId.name); |
| node = this.buildVariableDeclaration(patternId, tempConditional); |
| } else { |
| patternId = tempId; |
| node = _core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.cloneNode(tempId), tempConditional)); |
| } |
| |
| this.nodes.push(node); |
| this.push(left, patternId); |
| } else { |
| this.nodes.push(this.buildVariableAssignment(left, tempConditional)); |
| } |
| } |
| |
| pushObjectRest(pattern, objRef, spreadProp, spreadPropIndex) { |
| const keys = []; |
| let allLiteral = true; |
| let hasTemplateLiteral = false; |
| |
| for (let i = 0; i < pattern.properties.length; i++) { |
| const prop = pattern.properties[i]; |
| if (i >= spreadPropIndex) break; |
| if (_core.types.isRestElement(prop)) continue; |
| const key = prop.key; |
| |
| if (_core.types.isIdentifier(key) && !prop.computed) { |
| keys.push(_core.types.stringLiteral(key.name)); |
| } else if (_core.types.isTemplateLiteral(key)) { |
| keys.push(_core.types.cloneNode(key)); |
| hasTemplateLiteral = true; |
| } else if (_core.types.isLiteral(key)) { |
| keys.push(_core.types.stringLiteral(String(key.value))); |
| } else { |
| keys.push(_core.types.cloneNode(key)); |
| allLiteral = false; |
| } |
| } |
| |
| let value; |
| |
| if (keys.length === 0) { |
| value = _core.types.callExpression(getExtendsHelper(this), [_core.types.objectExpression([]), _core.types.cloneNode(objRef)]); |
| } else { |
| let keyExpression = _core.types.arrayExpression(keys); |
| |
| if (!allLiteral) { |
| keyExpression = _core.types.callExpression(_core.types.memberExpression(keyExpression, _core.types.identifier("map")), [this.addHelper("toPropertyKey")]); |
| } else if (!hasTemplateLiteral && !_core.types.isProgram(this.scope.block)) { |
| const program = this.scope.path.findParent(path => path.isProgram()); |
| const id = this.scope.generateUidIdentifier("excluded"); |
| program.scope.push({ |
| id, |
| init: keyExpression, |
| kind: "const" |
| }); |
| keyExpression = _core.types.cloneNode(id); |
| } |
| |
| value = _core.types.callExpression(this.addHelper(`objectWithoutProperties${objectRestNoSymbols ? "Loose" : ""}`), [_core.types.cloneNode(objRef), keyExpression]); |
| } |
| |
| this.nodes.push(this.buildVariableAssignment(spreadProp.argument, value)); |
| } |
| |
| pushObjectProperty(prop, propRef) { |
| if (_core.types.isLiteral(prop.key)) prop.computed = true; |
| const pattern = prop.value; |
| |
| const objRef = _core.types.memberExpression(_core.types.cloneNode(propRef), prop.key, prop.computed); |
| |
| if (_core.types.isPattern(pattern)) { |
| this.push(pattern, objRef); |
| } else { |
| this.nodes.push(this.buildVariableAssignment(pattern, objRef)); |
| } |
| } |
| |
| pushObjectPattern(pattern, objRef) { |
| if (!pattern.properties.length) { |
| this.nodes.push(_core.types.expressionStatement(_core.types.callExpression(this.addHelper("objectDestructuringEmpty"), [objRef]))); |
| } |
| |
| if (pattern.properties.length > 1 && !this.scope.isStatic(objRef)) { |
| const temp = this.scope.generateUidIdentifierBasedOnNode(objRef); |
| this.nodes.push(this.buildVariableDeclaration(temp, objRef)); |
| objRef = temp; |
| } |
| |
| if (hasObjectRest(pattern)) { |
| let copiedPattern; |
| |
| for (let i = 0; i < pattern.properties.length; i++) { |
| const prop = pattern.properties[i]; |
| |
| if (_core.types.isRestElement(prop)) { |
| break; |
| } |
| |
| const key = prop.key; |
| |
| if (prop.computed && !this.scope.isPure(key)) { |
| const name = this.scope.generateUidIdentifierBasedOnNode(key); |
| this.nodes.push(this.buildVariableDeclaration(name, key)); |
| |
| if (!copiedPattern) { |
| copiedPattern = pattern = Object.assign({}, pattern, { |
| properties: pattern.properties.slice() |
| }); |
| } |
| |
| copiedPattern.properties[i] = Object.assign({}, copiedPattern.properties[i], { |
| key: name |
| }); |
| } |
| } |
| } |
| |
| for (let i = 0; i < pattern.properties.length; i++) { |
| const prop = pattern.properties[i]; |
| |
| if (_core.types.isRestElement(prop)) { |
| this.pushObjectRest(pattern, objRef, prop, i); |
| } else { |
| this.pushObjectProperty(prop, objRef); |
| } |
| } |
| } |
| |
| canUnpackArrayPattern(pattern, arr) { |
| if (!_core.types.isArrayExpression(arr)) return false; |
| if (pattern.elements.length > arr.elements.length) return; |
| |
| if (pattern.elements.length < arr.elements.length && !hasRest(pattern)) { |
| return false; |
| } |
| |
| for (const elem of pattern.elements) { |
| if (!elem) return false; |
| if (_core.types.isMemberExpression(elem)) return false; |
| } |
| |
| for (const elem of arr.elements) { |
| if (_core.types.isSpreadElement(elem)) return false; |
| if (_core.types.isCallExpression(elem)) return false; |
| if (_core.types.isMemberExpression(elem)) return false; |
| } |
| |
| const bindings = _core.types.getBindingIdentifiers(pattern); |
| |
| const state = { |
| deopt: false, |
| bindings |
| }; |
| |
| try { |
| _core.types.traverse(arr, arrayUnpackVisitor, state); |
| } catch (e) { |
| if (e !== STOP_TRAVERSAL) throw e; |
| } |
| |
| return !state.deopt; |
| } |
| |
| pushUnpackedArrayPattern(pattern, arr) { |
| for (let i = 0; i < pattern.elements.length; i++) { |
| const elem = pattern.elements[i]; |
| |
| if (_core.types.isRestElement(elem)) { |
| this.push(elem.argument, _core.types.arrayExpression(arr.elements.slice(i))); |
| } else { |
| this.push(elem, arr.elements[i]); |
| } |
| } |
| } |
| |
| pushArrayPattern(pattern, arrayRef) { |
| if (!pattern.elements) return; |
| |
| if (this.canUnpackArrayPattern(pattern, arrayRef)) { |
| return this.pushUnpackedArrayPattern(pattern, arrayRef); |
| } |
| |
| const count = !hasRest(pattern) && pattern.elements.length; |
| const toArray = this.toArray(arrayRef, count); |
| |
| if (_core.types.isIdentifier(toArray)) { |
| arrayRef = toArray; |
| } else { |
| arrayRef = this.scope.generateUidIdentifierBasedOnNode(arrayRef); |
| this.arrays[arrayRef.name] = true; |
| this.nodes.push(this.buildVariableDeclaration(arrayRef, toArray)); |
| } |
| |
| for (let i = 0; i < pattern.elements.length; i++) { |
| let elem = pattern.elements[i]; |
| if (!elem) continue; |
| let elemRef; |
| |
| if (_core.types.isRestElement(elem)) { |
| elemRef = this.toArray(arrayRef); |
| elemRef = _core.types.callExpression(_core.types.memberExpression(elemRef, _core.types.identifier("slice")), [_core.types.numericLiteral(i)]); |
| elem = elem.argument; |
| } else { |
| elemRef = _core.types.memberExpression(arrayRef, _core.types.numericLiteral(i), true); |
| } |
| |
| this.push(elem, elemRef); |
| } |
| } |
| |
| init(pattern, ref) { |
| if (!_core.types.isArrayExpression(ref) && !_core.types.isMemberExpression(ref)) { |
| const memo = this.scope.maybeGenerateMemoised(ref, true); |
| |
| if (memo) { |
| this.nodes.push(this.buildVariableDeclaration(memo, _core.types.cloneNode(ref))); |
| ref = memo; |
| } |
| } |
| |
| this.push(pattern, ref); |
| return this.nodes; |
| } |
| |
| } |
| |
| return { |
| name: "transform-destructuring", |
| visitor: { |
| ExportNamedDeclaration(path) { |
| const declaration = path.get("declaration"); |
| if (!declaration.isVariableDeclaration()) return; |
| if (!variableDeclarationHasPattern(declaration.node)) return; |
| const specifiers = []; |
| |
| for (const name of Object.keys(path.getOuterBindingIdentifiers(path))) { |
| specifiers.push(_core.types.exportSpecifier(_core.types.identifier(name), _core.types.identifier(name))); |
| } |
| |
| path.replaceWith(declaration.node); |
| path.insertAfter(_core.types.exportNamedDeclaration(null, specifiers)); |
| }, |
| |
| ForXStatement(path) { |
| const { |
| node, |
| scope |
| } = path; |
| const left = node.left; |
| |
| if (_core.types.isPattern(left)) { |
| const temp = scope.generateUidIdentifier("ref"); |
| node.left = _core.types.variableDeclaration("var", [_core.types.variableDeclarator(temp)]); |
| path.ensureBlock(); |
| |
| if (node.body.body.length === 0 && path.isCompletionRecord()) { |
| node.body.body.unshift(_core.types.expressionStatement(scope.buildUndefinedNode())); |
| } |
| |
| node.body.body.unshift(_core.types.expressionStatement(_core.types.assignmentExpression("=", left, temp))); |
| return; |
| } |
| |
| if (!_core.types.isVariableDeclaration(left)) return; |
| const pattern = left.declarations[0].id; |
| if (!_core.types.isPattern(pattern)) return; |
| const key = scope.generateUidIdentifier("ref"); |
| node.left = _core.types.variableDeclaration(left.kind, [_core.types.variableDeclarator(key, null)]); |
| const nodes = []; |
| const destructuring = new DestructuringTransformer({ |
| kind: left.kind, |
| scope: scope, |
| nodes: nodes, |
| iterableIsArray, |
| arrayLikeIsIterable, |
| addHelper: name => this.addHelper(name) |
| }); |
| destructuring.init(pattern, key); |
| path.ensureBlock(); |
| const block = node.body; |
| block.body = nodes.concat(block.body); |
| }, |
| |
| CatchClause({ |
| node, |
| scope |
| }) { |
| const pattern = node.param; |
| if (!_core.types.isPattern(pattern)) return; |
| const ref = scope.generateUidIdentifier("ref"); |
| node.param = ref; |
| const nodes = []; |
| const destructuring = new DestructuringTransformer({ |
| kind: "let", |
| scope: scope, |
| nodes: nodes, |
| iterableIsArray, |
| arrayLikeIsIterable, |
| addHelper: name => this.addHelper(name) |
| }); |
| destructuring.init(pattern, ref); |
| node.body.body = nodes.concat(node.body.body); |
| }, |
| |
| AssignmentExpression(path) { |
| const { |
| node, |
| scope |
| } = path; |
| if (!_core.types.isPattern(node.left)) return; |
| const nodes = []; |
| const destructuring = new DestructuringTransformer({ |
| operator: node.operator, |
| scope: scope, |
| nodes: nodes, |
| iterableIsArray, |
| arrayLikeIsIterable, |
| addHelper: name => this.addHelper(name) |
| }); |
| let ref; |
| |
| if (path.isCompletionRecord() || !path.parentPath.isExpressionStatement()) { |
| ref = scope.generateUidIdentifierBasedOnNode(node.right, "ref"); |
| nodes.push(_core.types.variableDeclaration("var", [_core.types.variableDeclarator(ref, node.right)])); |
| |
| if (_core.types.isArrayExpression(node.right)) { |
| destructuring.arrays[ref.name] = true; |
| } |
| } |
| |
| destructuring.init(node.left, ref || node.right); |
| |
| if (ref) { |
| if (path.parentPath.isArrowFunctionExpression()) { |
| path.replaceWith(_core.types.blockStatement([])); |
| nodes.push(_core.types.returnStatement(_core.types.cloneNode(ref))); |
| } else { |
| nodes.push(_core.types.expressionStatement(_core.types.cloneNode(ref))); |
| } |
| } |
| |
| path.replaceWithMultiple(nodes); |
| path.scope.crawl(); |
| }, |
| |
| VariableDeclaration(path) { |
| const { |
| node, |
| scope, |
| parent |
| } = path; |
| if (_core.types.isForXStatement(parent)) return; |
| if (!parent || !path.container) return; |
| if (!variableDeclarationHasPattern(node)) return; |
| const nodeKind = node.kind; |
| const nodeLoc = node.loc; |
| const nodes = []; |
| let declar; |
| |
| for (let i = 0; i < node.declarations.length; i++) { |
| declar = node.declarations[i]; |
| const patternId = declar.init; |
| const pattern = declar.id; |
| const destructuring = new DestructuringTransformer({ |
| blockHoist: node._blockHoist, |
| nodes: nodes, |
| scope: scope, |
| kind: node.kind, |
| iterableIsArray, |
| arrayLikeIsIterable, |
| addHelper: name => this.addHelper(name) |
| }); |
| |
| if (_core.types.isPattern(pattern)) { |
| destructuring.init(pattern, patternId); |
| |
| if (+i !== node.declarations.length - 1) { |
| _core.types.inherits(nodes[nodes.length - 1], declar); |
| } |
| } else { |
| nodes.push(_core.types.inherits(destructuring.buildVariableAssignment(declar.id, _core.types.cloneNode(declar.init)), declar)); |
| } |
| } |
| |
| let tail = null; |
| const nodesOut = []; |
| |
| for (const node of nodes) { |
| if (tail !== null && _core.types.isVariableDeclaration(node)) { |
| tail.declarations.push(...node.declarations); |
| } else { |
| node.kind = nodeKind; |
| |
| if (!node.loc) { |
| node.loc = nodeLoc; |
| } |
| |
| nodesOut.push(node); |
| tail = _core.types.isVariableDeclaration(node) ? node : null; |
| } |
| } |
| |
| for (const nodeOut of nodesOut) { |
| if (!nodeOut.declarations) continue; |
| |
| for (const declaration of nodeOut.declarations) { |
| const { |
| name |
| } = declaration.id; |
| |
| if (scope.bindings[name]) { |
| scope.bindings[name].kind = nodeOut.kind; |
| } |
| } |
| } |
| |
| if (nodesOut.length === 1) { |
| path.replaceWith(nodesOut[0]); |
| } else { |
| path.replaceWithMultiple(nodesOut); |
| } |
| } |
| |
| } |
| }; |
| }); |
| |
| exports.default = _default; |