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=== tests/cases/conformance/controlFlow/assertionTypePredicates2.js ===
/**
* @typedef {{ x: number }} A
*/
/**
* @typedef { A & { y: number } } B
*/
/**
* @param {A} a
* @returns { asserts a is B }
*/
const foo = (a) => {
>foo : (a: A) => asserts a is B
>(a) => { if (/** @type { B } */ (a).y !== 0) throw TypeError(); return undefined;} : (a: A) => asserts a is B
>a : A
if (/** @type { B } */ (a).y !== 0) throw TypeError();
>(a).y !== 0 : boolean
>(a).y : number
>(a) : B
>a : A
>y : number
>0 : 0
>TypeError() : TypeError
>TypeError : TypeErrorConstructor
return undefined;
>undefined : undefined
};
export const main = () => {
>main : () => void
>() => { /** @type { A } */ const a = { x: 1 }; foo(a);} : () => void
/** @type { A } */
const a = { x: 1 };
>a : A
>{ x: 1 } : { x: number; }
>x : number
>1 : 1
foo(a);
>foo(a) : void
>foo : (a: A) => asserts a is B
>a : A
};
|
