1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
|
=== tests/cases/conformance/types/typeRelationships/apparentType/apparentTypeSupertype.ts ===
// subtype checks use the apparent type of the target type
// S is a subtype of a type T, and T is a supertype of S, if one of the following is true, where S' denotes the apparent type (section 3.8.1) of S:
class Base {
>Base : Symbol(Base, Decl(apparentTypeSupertype.ts, 0, 0))
x: string;
>x : Symbol(Base.x, Decl(apparentTypeSupertype.ts, 3, 12))
}
// is String (S) a subtype of U extends String (T)? Would only be true if we used the apparent type of U (T)
class Derived<U extends String> extends Base { // error
>Derived : Symbol(Derived, Decl(apparentTypeSupertype.ts, 5, 1))
>U : Symbol(U, Decl(apparentTypeSupertype.ts, 8, 14))
>String : Symbol(String, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>Base : Symbol(Base, Decl(apparentTypeSupertype.ts, 0, 0))
x: U;
>x : Symbol(Derived.x, Decl(apparentTypeSupertype.ts, 8, 46))
>U : Symbol(U, Decl(apparentTypeSupertype.ts, 8, 14))
}
|