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Force parentheses around array and conditional infer (#11227)

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Sergey Melyukov 2020-03-10 19:27:52 +03:00 committed by GitHub
parent eb65195f09
commit cb9d28c42c
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2 changed files with 13 additions and 0 deletions
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4
packages/babel-generator/src/node/parentheses.js
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@ -157,6 +157,10 @@ export function TSUnionType(node: Object, parent: Object): boolean {
export { TSUnionType as TSIntersectionType };
export function TSInferType(node: Object, parent: Object): boolean {
return t.isTSArrayType(parent) || t.isTSOptionalType(parent);
}
export function BinaryExpression(node: Object, parent: Object): boolean {
// let i = (1 in []);
// for ((1 in []);;);

9
packages/babel-generator/test/index.js
View File

@ -295,6 +295,15 @@ describe("generation", function() {
expect(generated).toHaveProperty("map");
expect(typeof generated.map).toBe("object");
});
it("wraps around infer inside an array type", () => {
const type = t.tsArrayType(
t.tsInferType(t.tsTypeParameter(null, null, "T")),
);
const output = generate(type).code;
expect(output).toBe("(infer T)[]");
});
});
describe("programmatic generation", function() {