mirror of
https://github.com/swc-project/swc.git
synced 2024-12-28 08:04:43 +03:00
86 lines
2.1 KiB
XML
86 lines
2.1 KiB
XML
// @strict: true
|
|
|
|
// From #4260
|
|
class X<T> {
|
|
f(t: T) {
|
|
return { a: t };
|
|
}
|
|
}
|
|
|
|
declare const x: X<void>;
|
|
x.f() // no error because f expects void
|
|
|
|
declare const xUnion: X<void | number>;
|
|
xUnion.f(42) // no error because f accepts number
|
|
xUnion.f() // no error because f accepts void
|
|
|
|
declare const xAny: X<any>;
|
|
xAny.f() // error, any still expects an argument
|
|
|
|
declare const xUnknown: X<unknown>;
|
|
xUnknown.f() // error, unknown still expects an argument
|
|
|
|
declare const xNever: X<never>;
|
|
xNever.f() // error, never still expects an argument
|
|
|
|
|
|
// Promise has previously been updated to work without arguments, but to show this fixes the issue too.
|
|
|
|
class MyPromise<X> {
|
|
constructor(executor: (resolve: (value: X) => void) => void) {
|
|
|
|
}
|
|
}
|
|
|
|
new MyPromise<void>(resolve => resolve()); // no error
|
|
new MyPromise<void | number>(resolve => resolve()); // no error
|
|
new MyPromise<any>(resolve => resolve()); // error, `any` arguments cannot be omitted
|
|
new MyPromise<unknown>(resolve => resolve()); // error, `unknown` arguments cannot be omitted
|
|
new MyPromise<never>(resolve => resolve()); // error, `never` arguments cannot be omitted
|
|
|
|
|
|
// Multiple parameters
|
|
|
|
function a(x: number, y: string, z: void): void {
|
|
|
|
}
|
|
|
|
a(4, "hello"); // ok
|
|
a(4, "hello", void 0); // ok
|
|
a(4); // not ok
|
|
|
|
function b(x: number, y: string, z: void, what: number): void {
|
|
|
|
}
|
|
|
|
b(4, "hello", void 0, 2); // ok
|
|
b(4, "hello"); // not ok
|
|
b(4, "hello", void 0); // not ok
|
|
b(4); // not ok
|
|
|
|
function c(x: number | void, y: void, z: void | string | number): void {
|
|
|
|
}
|
|
|
|
c(3, void 0, void 0); // ok
|
|
c(3, void 0); // ok
|
|
c(3); // ok
|
|
c(); // ok
|
|
|
|
|
|
// Spread Parameters
|
|
|
|
declare function call<TS extends unknown[]>(
|
|
handler: (...args: TS) => unknown,
|
|
...args: TS): void;
|
|
|
|
call((x: number, y: number) => x + y) // error
|
|
call((x: number, y: number) => x + y, 4, 2) // ok
|
|
|
|
call((x: number, y: void) => x, 4, void 0) // ok
|
|
call((x: number, y: void) => x, 4) // ok
|
|
call((x: void, y: void) => 42) // ok
|
|
call((x: number | void, y: number | void) => 42) // ok
|
|
call((x: number | void, y: number | void) => 42, 4) // ok
|
|
call((x: number | void, y: number | void) => 42, 4, 2) // ok
|