19 lines
524 B
TypeScript
19 lines
524 B
TypeScript
// @target: es2015
|
|
// https://github.com/Microsoft/TypeScript/issues/18186
|
|
|
|
class AsyncEnumeratorDone { };
|
|
|
|
interface IAsyncEnumerator<T> {
|
|
next1(): Promise<T | AsyncEnumeratorDone>;
|
|
next2(): Promise<T> | Promise<AsyncEnumeratorDone>;
|
|
next3(): Promise<T | {}>;
|
|
next4(): Promise<T | { x: string }>;
|
|
}
|
|
|
|
async function main() {
|
|
const x: IAsyncEnumerator<number> = null;
|
|
let a = await x.next1();
|
|
let b = await x.next2();
|
|
let c = await x.next3();
|
|
let d = await x.next4();
|
|
}
|