Files
babel/packages/babel-plugin-proposal-throw-expressions/src/index.js
2017-11-06 11:32:47 -08:00

25 lines
603 B
JavaScript

import syntaxThrowExpressions from "@babel/plugin-syntax-throw-expressions";
import { types as t } from "@babel/core";
export default function() {
return {
inherits: syntaxThrowExpressions,
visitor: {
UnaryExpression(path) {
const { operator, argument } = path.node;
if (operator !== "throw") return;
const arg = t.identifier("e");
const arrow = t.functionExpression(
null,
[arg],
t.blockStatement([t.throwStatement(arg)]),
);
path.replaceWith(t.callExpression(arrow, [argument]));
},
},
};
}