23f98a753a
* Add throw expressions Stage 2 proposal: https://github.com/tc39/proposal-throw-expressions * Update babylon * Add to stage 2
24 lines
572 B
JavaScript
24 lines
572 B
JavaScript
import syntaxThrowExpressions from "babel-plugin-syntax-throw-expressions";
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export default function({ types: t }) {
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return {
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inherits: syntaxThrowExpressions,
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visitor: {
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UnaryExpression(path) {
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const { operator, argument } = path.node;
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if (operator !== "throw") return;
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const arg = t.identifier("e");
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const arrow = t.functionExpression(
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null,
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[arg],
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t.blockStatement([t.throwStatement(arg)]),
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);
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path.replaceWith(t.callExpression(arrow, [argument]));
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},
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},
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};
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}
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