284 lines
8 KiB
JavaScript
284 lines
8 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = rewriteLiveReferences;
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function _assert() {
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const data = _interopRequireDefault(require("assert"));
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_assert = function () {
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return data;
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};
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return data;
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}
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function t() {
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const data = _interopRequireWildcard(require("@babel/types"));
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t = function () {
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return data;
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};
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return data;
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}
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function _template() {
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const data = _interopRequireDefault(require("@babel/template"));
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_template = function () {
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return data;
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};
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return data;
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}
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function _helperSimpleAccess() {
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const data = _interopRequireDefault(require("@babel/helper-simple-access"));
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_helperSimpleAccess = function () {
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return data;
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};
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return data;
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}
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function rewriteLiveReferences(programPath, metadata) {
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const imported = new Map();
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const exported = new Map();
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const requeueInParent = path => {
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programPath.requeue(path);
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};
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for (const [source, data] of metadata.source) {
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for (const [localName, importName] of data.imports) {
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imported.set(localName, [source, importName, null]);
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}
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for (const localName of data.importsNamespace) {
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imported.set(localName, [source, null, localName]);
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}
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}
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for (const [local, data] of metadata.local) {
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let exportMeta = exported.get(local);
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if (!exportMeta) {
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exportMeta = [];
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exported.set(local, exportMeta);
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}
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exportMeta.push(...data.names);
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}
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programPath.traverse(rewriteBindingInitVisitor, {
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metadata,
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requeueInParent,
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scope: programPath.scope,
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exported
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});
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(0, _helperSimpleAccess().default)(programPath, new Set([...Array.from(imported.keys()), ...Array.from(exported.keys())]));
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programPath.traverse(rewriteReferencesVisitor, {
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seen: new WeakSet(),
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metadata,
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requeueInParent,
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scope: programPath.scope,
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imported,
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exported,
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buildImportReference: ([source, importName, localName], identNode) => {
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const meta = metadata.source.get(source);
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if (localName) {
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if (meta.lazy) identNode = t().callExpression(identNode, []);
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return identNode;
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}
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let namespace = t().identifier(meta.name);
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if (meta.lazy) namespace = t().callExpression(namespace, []);
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return t().memberExpression(namespace, t().identifier(importName));
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}
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});
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}
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const rewriteBindingInitVisitor = {
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ClassProperty(path) {
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path.skip();
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},
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Function(path) {
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path.skip();
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},
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ClassDeclaration(path) {
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const {
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requeueInParent,
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exported,
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metadata
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} = this;
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const {
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id
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} = path.node;
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if (!id) throw new Error("Expected class to have a name");
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const localName = id.name;
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const exportNames = exported.get(localName) || [];
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if (exportNames.length > 0) {
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const statement = t().expressionStatement(buildBindingExportAssignmentExpression(metadata, exportNames, t().identifier(localName)));
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statement._blockHoist = path.node._blockHoist;
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requeueInParent(path.insertAfter(statement)[0]);
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}
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},
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VariableDeclaration(path) {
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const {
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requeueInParent,
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exported,
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metadata
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} = this;
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Object.keys(path.getOuterBindingIdentifiers()).forEach(localName => {
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const exportNames = exported.get(localName) || [];
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if (exportNames.length > 0) {
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const statement = t().expressionStatement(buildBindingExportAssignmentExpression(metadata, exportNames, t().identifier(localName)));
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statement._blockHoist = path.node._blockHoist;
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requeueInParent(path.insertAfter(statement)[0]);
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}
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});
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}
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};
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const buildBindingExportAssignmentExpression = (metadata, exportNames, localExpr) => {
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return (exportNames || []).reduce((expr, exportName) => {
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return t().assignmentExpression("=", t().memberExpression(t().identifier(metadata.exportName), t().identifier(exportName)), expr);
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}, localExpr);
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};
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const buildImportThrow = localName => {
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return _template().default.expression.ast`
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(function() {
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throw new Error('"' + '${localName}' + '" is read-only.');
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})()
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`;
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};
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const rewriteReferencesVisitor = {
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ReferencedIdentifier(path) {
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const {
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seen,
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buildImportReference,
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scope,
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imported,
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requeueInParent
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} = this;
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if (seen.has(path.node)) return;
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seen.add(path.node);
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const localName = path.node.name;
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const localBinding = path.scope.getBinding(localName);
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const rootBinding = scope.getBinding(localName);
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if (rootBinding !== localBinding) return;
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const importData = imported.get(localName);
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if (importData) {
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const ref = buildImportReference(importData, path.node);
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ref.loc = path.node.loc;
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if (path.parentPath.isCallExpression({
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callee: path.node
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}) && t().isMemberExpression(ref)) {
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path.replaceWith(t().sequenceExpression([t().numericLiteral(0), ref]));
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} else if (path.isJSXIdentifier() && t().isMemberExpression(ref)) {
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const {
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object,
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property
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} = ref;
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path.replaceWith(t().JSXMemberExpression(t().JSXIdentifier(object.name), t().JSXIdentifier(property.name)));
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} else {
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path.replaceWith(ref);
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}
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requeueInParent(path);
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path.skip();
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}
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},
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AssignmentExpression: {
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exit(path) {
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const {
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scope,
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seen,
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imported,
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exported,
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requeueInParent,
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buildImportReference
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} = this;
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if (seen.has(path.node)) return;
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seen.add(path.node);
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const left = path.get("left");
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if (left.isIdentifier()) {
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const localName = left.node.name;
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if (scope.getBinding(localName) !== path.scope.getBinding(localName)) {
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return;
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}
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const exportedNames = exported.get(localName) || [];
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const importData = imported.get(localName);
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if (exportedNames.length > 0 || importData) {
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(0, _assert().default)(path.node.operator === "=", "Path was not simplified");
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const assignment = path.node;
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if (importData) {
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assignment.left = buildImportReference(importData, assignment.left);
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assignment.right = t().sequenceExpression([assignment.right, buildImportThrow(localName)]);
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}
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path.replaceWith(buildBindingExportAssignmentExpression(this.metadata, exportedNames, assignment));
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requeueInParent(path);
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}
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} else if (left.isMemberExpression()) {} else {
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const ids = left.getOuterBindingIdentifiers();
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const id = Object.keys(ids).filter(localName => imported.has(localName)).pop();
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if (id) {
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path.node.right = t().sequenceExpression([path.node.right, buildImportThrow(id)]);
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}
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const items = [];
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Object.keys(ids).forEach(localName => {
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if (scope.getBinding(localName) !== path.scope.getBinding(localName)) {
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return;
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}
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const exportedNames = exported.get(localName) || [];
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if (exportedNames.length > 0) {
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items.push(buildBindingExportAssignmentExpression(this.metadata, exportedNames, t().identifier(localName)));
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}
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});
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if (items.length > 0) {
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let node = t().sequenceExpression(items);
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if (path.parentPath.isExpressionStatement()) {
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node = t().expressionStatement(node);
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node._blockHoist = path.parentPath.node._blockHoist;
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}
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const statement = path.insertAfter(node)[0];
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requeueInParent(statement);
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}
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}
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}
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}
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};
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