33 lines
654 B
TypeScript
33 lines
654 B
TypeScript
|
|
class A {
|
|
propA: number;
|
|
}
|
|
|
|
class B {
|
|
propB: number;
|
|
}
|
|
|
|
class C extends A {
|
|
propC: number;
|
|
}
|
|
|
|
declare function isB(p1): p1 is B;
|
|
declare function isC(p1): p1 is C;
|
|
declare function retC(x): C;
|
|
|
|
declare function funA<T>(p1: (p1) => T): T;
|
|
declare function funB<T>(p1: (p1) => T, p2: any): p2 is T;
|
|
declare function funC<T>(p1: (p1) => p1 is T): T;
|
|
declare function funD<T>(p1: (p1) => p1 is T, p2: any): p2 is T;
|
|
declare function funE<T, U>(p1: (p1) => p1 is T, p2: U): T;
|
|
|
|
let a: A;
|
|
let test1: boolean = funA(isB);
|
|
if (funB(retC, a)) {
|
|
a.propC;
|
|
}
|
|
let test2: B = funC(isB);
|
|
if (funD(isC, a)) {
|
|
a.propC;
|
|
}
|
|
let test3: B = funE(isB, 1); |