37 lines
1.0 KiB
JavaScript
37 lines
1.0 KiB
JavaScript
import remapAsyncToGenerator from "@babel/helper-remap-async-to-generator";
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import syntaxAsyncGenerators from "@babel/plugin-syntax-async-generators";
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import { types as t } from "@babel/core";
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export default function() {
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const yieldStarVisitor = {
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Function(path) {
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path.skip();
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},
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YieldExpression({ node }, state) {
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if (!node.delegate) return;
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const callee = state.addHelper("asyncGeneratorDelegate");
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node.argument = t.callExpression(callee, [
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t.callExpression(state.addHelper("asyncIterator"), [node.argument]),
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state.addHelper("awaitAsyncGenerator"),
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]);
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},
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};
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return {
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inherits: syntaxAsyncGenerators,
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visitor: {
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Function(path, state) {
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if (!path.node.async || !path.node.generator) return;
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path.traverse(yieldStarVisitor, state);
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remapAsyncToGenerator(path, state.file, {
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wrapAsync: state.addHelper("wrapAsyncGenerator"),
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wrapAwait: state.addHelper("awaitAsyncGenerator"),
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});
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},
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},
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};
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}
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