115 lines
3.8 KiB
JavaScript
115 lines
3.8 KiB
JavaScript
import definitions from "./definitions";
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export default function ({ types: t }) {
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const RUNTIME_MODULE_NAME = "babel-runtime";
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function has(obj, key) {
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return Object.prototype.hasOwnProperty.call(obj, key);
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}
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return {
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metadata: {
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group: "builtin-post-modules"
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},
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pre(file) {
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file.set("helperGenerator", function (name) {
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return file.addImport(`${RUNTIME_MODULE_NAME}/helpers/${name}`, name, "absoluteDefault");
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});
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file.setDynamic("regeneratorIdentifier", function () {
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return file.addImport(`${RUNTIME_MODULE_NAME}/regenerator`, "regeneratorRuntime", "absoluteDefault");
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});
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},
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visitor: {
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ReferencedIdentifier(node, parent, scope, file) {
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if (node.name === "regeneratorRuntime") {
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return file.get("regeneratorIdentifier");
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}
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if (t.isMemberExpression(parent)) return;
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if (!has(definitions.builtins, node.name)) return;
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if (scope.getBindingIdentifier(node.name)) return;
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// Symbol() -> _core.Symbol(); new Promise -> new _core.Promise
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var modulePath = definitions.builtins[node.name];
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return file.addImport(`${RUNTIME_MODULE_NAME}/core-js/${modulePath}`, node.name, "absoluteDefault");
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},
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CallExpression(node, parent, scope, file) {
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// arr[Symbol.iterator]() -> _core.$for.getIterator(arr)
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if (node.arguments.length) return;
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var callee = node.callee;
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if (!t.isMemberExpression(callee)) return;
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if (!callee.computed) return;
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if (!this.get("callee.property").matchesPattern("Symbol.iterator")) return;
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return t.callExpression(file.addImport(`${RUNTIME_MODULE_NAME}/core-js/get-iterator`, "getIterator", "absoluteDefault"), [callee.object]);
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},
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BinaryExpression(node, parent, scope, file) {
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// Symbol.iterator in arr -> core.$for.isIterable(arr)
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if (node.operator !== "in") return;
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if (!this.get("left").matchesPattern("Symbol.iterator")) return;
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return t.callExpression(
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file.addImport(`${RUNTIME_MODULE_NAME}/core-js/is-iterable`, "isIterable", "absoluteDefault"),
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[node.right]
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);
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},
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MemberExpression: {
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enter(node, parent, scope, file) {
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// Array.from -> _core.Array.from
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if (!this.isReferenced()) return;
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var obj = node.object;
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var prop = node.property;
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if (!t.isReferenced(obj, node)) return;
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if (node.computed) return;
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if (!has(definitions.methods, obj.name)) return;
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var methods = definitions.methods[obj.name];
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if (!has(methods, prop.name)) return;
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// doesn't reference the global
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if (scope.getBindingIdentifier(obj.name)) return;
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// special case Object.defineProperty to not use core-js when using string keys
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if (obj.name === "Object" && prop.name === "defineProperty" && this.parentPath.isCallExpression()) {
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var call = this.parentPath.node;
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if (call.arguments.length === 3 && t.isLiteral(call.arguments[1])) return;
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}
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var modulePath = methods[prop.name];
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return file.addImport(`${RUNTIME_MODULE_NAME}/core-js/${modulePath}`, `${obj.name}$${prop.name}`, "absoluteDefault");
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},
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exit(node, parent, scope, file) {
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if (!this.isReferenced()) return;
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var prop = node.property;
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var obj = node.object;
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if (!has(definitions.builtins, obj.name)) return;
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if (scope.getBindingIdentifier(obj.name)) return;
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var modulePath = definitions.builtins[obj.name];
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return t.memberExpression(
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file.addImport(`${RUNTIME_MODULE_NAME}/core-js/${modulePath}`, `${obj.name}`, "absoluteDefault"),
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prop
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);
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}
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}
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}
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};
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}
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