lepu-test-platform-web/node_modules/@babel/helper-split-export-declara.../lib/index.js

58 lines
2.1 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = splitExportDeclaration;
var t = require("@babel/types");
function splitExportDeclaration(exportDeclaration) {
if (!exportDeclaration.isExportDeclaration()) {
throw new Error("Only export declarations can be split.");
}
const isDefault = exportDeclaration.isExportDefaultDeclaration();
const declaration = exportDeclaration.get("declaration");
const isClassDeclaration = declaration.isClassDeclaration();
if (isDefault) {
const standaloneDeclaration = declaration.isFunctionDeclaration() || isClassDeclaration;
const scope = declaration.isScope() ? declaration.scope.parent : declaration.scope;
let id = declaration.node.id;
let needBindingRegistration = false;
if (!id) {
needBindingRegistration = true;
id = scope.generateUidIdentifier("default");
if (standaloneDeclaration || declaration.isFunctionExpression() || declaration.isClassExpression()) {
declaration.node.id = t.cloneNode(id);
}
}
const updatedDeclaration = standaloneDeclaration ? declaration : t.variableDeclaration("var", [t.variableDeclarator(t.cloneNode(id), declaration.node)]);
const updatedExportDeclaration = t.exportNamedDeclaration(null, [t.exportSpecifier(t.cloneNode(id), t.identifier("default"))]);
exportDeclaration.insertAfter(updatedExportDeclaration);
exportDeclaration.replaceWith(updatedDeclaration);
if (needBindingRegistration) {
scope.registerDeclaration(exportDeclaration);
}
return exportDeclaration;
}
if (exportDeclaration.get("specifiers").length > 0) {
throw new Error("It doesn't make sense to split exported specifiers.");
}
const bindingIdentifiers = declaration.getOuterBindingIdentifiers();
const specifiers = Object.keys(bindingIdentifiers).map(name => {
return t.exportSpecifier(t.identifier(name), t.identifier(name));
});
const aliasDeclar = t.exportNamedDeclaration(null, specifiers);
exportDeclaration.insertAfter(aliasDeclar);
exportDeclaration.replaceWith(declaration.node);
return exportDeclaration;
}