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|
=== tests/cases/compiler/strictFunctionTypesErrors.ts ===
export {}
declare let f1: (x: Object) => Object;
>f1 : (x: Object) => Object
>x : Object
declare let f2: (x: Object) => string;
>f2 : (x: Object) => string
>x : Object
declare let f3: (x: string) => Object;
>f3 : (x: string) => Object
>x : string
declare let f4: (x: string) => string;
>f4 : (x: string) => string
>x : string
f1 = f2; // Ok
>f1 = f2 : (x: Object) => string
>f1 : (x: Object) => Object
>f2 : (x: Object) => string
f1 = f3; // Error
>f1 = f3 : (x: string) => Object
>f1 : (x: Object) => Object
>f3 : (x: string) => Object
f1 = f4; // Error
>f1 = f4 : (x: string) => string
>f1 : (x: Object) => Object
>f4 : (x: string) => string
f2 = f1; // Error
>f2 = f1 : (x: Object) => Object
>f2 : (x: Object) => string
>f1 : (x: Object) => Object
f2 = f3; // Error
>f2 = f3 : (x: string) => Object
>f2 : (x: Object) => string
>f3 : (x: string) => Object
f2 = f4; // Error
>f2 = f4 : (x: string) => string
>f2 : (x: Object) => string
>f4 : (x: string) => string
f3 = f1; // Ok
>f3 = f1 : (x: Object) => Object
>f3 : (x: string) => Object
>f1 : (x: Object) => Object
f3 = f2; // Ok
>f3 = f2 : (x: Object) => string
>f3 : (x: string) => Object
>f2 : (x: Object) => string
f3 = f4; // Ok
>f3 = f4 : (x: string) => string
>f3 : (x: string) => Object
>f4 : (x: string) => string
f4 = f1; // Error
>f4 = f1 : (x: Object) => Object
>f4 : (x: string) => string
>f1 : (x: Object) => Object
f4 = f2; // Ok
>f4 = f2 : (x: Object) => string
>f4 : (x: string) => string
>f2 : (x: Object) => string
f4 = f3; // Error
>f4 = f3 : (x: string) => Object
>f4 : (x: string) => string
>f3 : (x: string) => Object
type Func<T, U> = (x: T) => U;
>Func : Func<T, U>
>x : T
declare let g1: Func<Object, Object>;
>g1 : Func<Object, Object>
declare let g2: Func<Object, string>;
>g2 : Func<Object, string>
declare let g3: Func<string, Object>;
>g3 : Func<string, Object>
declare let g4: Func<string, string>;
>g4 : Func<string, string>
g1 = g2; // Ok
>g1 = g2 : Func<Object, string>
>g1 : Func<Object, Object>
>g2 : Func<Object, string>
g1 = g3; // Error
>g1 = g3 : Func<string, Object>
>g1 : Func<Object, Object>
>g3 : Func<string, Object>
g1 = g4; // Error
>g1 = g4 : Func<string, string>
>g1 : Func<Object, Object>
>g4 : Func<string, string>
g2 = g1; // Error
>g2 = g1 : Func<Object, Object>
>g2 : Func<Object, string>
>g1 : Func<Object, Object>
g2 = g3; // Error
>g2 = g3 : Func<string, Object>
>g2 : Func<Object, string>
>g3 : Func<string, Object>
g2 = g4; // Error
>g2 = g4 : Func<string, string>
>g2 : Func<Object, string>
>g4 : Func<string, string>
g3 = g1; // Ok
>g3 = g1 : Func<Object, Object>
>g3 : Func<string, Object>
>g1 : Func<Object, Object>
g3 = g2; // Ok
>g3 = g2 : Func<Object, string>
>g3 : Func<string, Object>
>g2 : Func<Object, string>
g3 = g4; // Ok
>g3 = g4 : Func<string, string>
>g3 : Func<string, Object>
>g4 : Func<string, string>
g4 = g1; // Error
>g4 = g1 : Func<Object, Object>
>g4 : Func<string, string>
>g1 : Func<Object, Object>
g4 = g2; // Ok
>g4 = g2 : Func<Object, string>
>g4 : Func<string, string>
>g2 : Func<Object, string>
g4 = g3; // Error
>g4 = g3 : Func<string, Object>
>g4 : Func<string, string>
>g3 : Func<string, Object>
declare let h1: Func<Func<Object, void>, Object>;
>h1 : Func<Func<Object, void>, Object>
declare let h2: Func<Func<Object, void>, string>;
>h2 : Func<Func<Object, void>, string>
declare let h3: Func<Func<string, void>, Object>;
>h3 : Func<Func<string, void>, Object>
declare let h4: Func<Func<string, void>, string>;
>h4 : Func<Func<string, void>, string>
h1 = h2; // Ok
>h1 = h2 : Func<Func<Object, void>, string>
>h1 : Func<Func<Object, void>, Object>
>h2 : Func<Func<Object, void>, string>
h1 = h3; // Ok
>h1 = h3 : Func<Func<string, void>, Object>
>h1 : Func<Func<Object, void>, Object>
>h3 : Func<Func<string, void>, Object>
h1 = h4; // Ok
>h1 = h4 : Func<Func<string, void>, string>
>h1 : Func<Func<Object, void>, Object>
>h4 : Func<Func<string, void>, string>
h2 = h1; // Error
>h2 = h1 : Func<Func<Object, void>, Object>
>h2 : Func<Func<Object, void>, string>
>h1 : Func<Func<Object, void>, Object>
h2 = h3; // Error
>h2 = h3 : Func<Func<string, void>, Object>
>h2 : Func<Func<Object, void>, string>
>h3 : Func<Func<string, void>, Object>
h2 = h4; // Ok
>h2 = h4 : Func<Func<string, void>, string>
>h2 : Func<Func<Object, void>, string>
>h4 : Func<Func<string, void>, string>
h3 = h1; // Error
>h3 = h1 : Func<Func<Object, void>, Object>
>h3 : Func<Func<string, void>, Object>
>h1 : Func<Func<Object, void>, Object>
h3 = h2; // Error
>h3 = h2 : Func<Func<Object, void>, string>
>h3 : Func<Func<string, void>, Object>
>h2 : Func<Func<Object, void>, string>
h3 = h4; // Ok
>h3 = h4 : Func<Func<string, void>, string>
>h3 : Func<Func<string, void>, Object>
>h4 : Func<Func<string, void>, string>
h4 = h1; // Error
>h4 = h1 : Func<Func<Object, void>, Object>
>h4 : Func<Func<string, void>, string>
>h1 : Func<Func<Object, void>, Object>
h4 = h2; // Error
>h4 = h2 : Func<Func<Object, void>, string>
>h4 : Func<Func<string, void>, string>
>h2 : Func<Func<Object, void>, string>
h4 = h3; // Error
>h4 = h3 : Func<Func<string, void>, Object>
>h4 : Func<Func<string, void>, string>
>h3 : Func<Func<string, void>, Object>
declare let i1: Func<Object, Func<Object, void>>;
>i1 : Func<Object, Func<Object, void>>
declare let i2: Func<Object, Func<string, void>>;
>i2 : Func<Object, Func<string, void>>
declare let i3: Func<string, Func<Object, void>>;
>i3 : Func<string, Func<Object, void>>
declare let i4: Func<string, Func<string, void>>;
>i4 : Func<string, Func<string, void>>
i1 = i2; // Error
>i1 = i2 : Func<Object, Func<string, void>>
>i1 : Func<Object, Func<Object, void>>
>i2 : Func<Object, Func<string, void>>
i1 = i3; // Error
>i1 = i3 : Func<string, Func<Object, void>>
>i1 : Func<Object, Func<Object, void>>
>i3 : Func<string, Func<Object, void>>
i1 = i4; // Error
>i1 = i4 : Func<string, Func<string, void>>
>i1 : Func<Object, Func<Object, void>>
>i4 : Func<string, Func<string, void>>
i2 = i1; // Ok
>i2 = i1 : Func<Object, Func<Object, void>>
>i2 : Func<Object, Func<string, void>>
>i1 : Func<Object, Func<Object, void>>
i2 = i3; // Error
>i2 = i3 : Func<string, Func<Object, void>>
>i2 : Func<Object, Func<string, void>>
>i3 : Func<string, Func<Object, void>>
i2 = i4; // Error
>i2 = i4 : Func<string, Func<string, void>>
>i2 : Func<Object, Func<string, void>>
>i4 : Func<string, Func<string, void>>
i3 = i1; // Ok
>i3 = i1 : Func<Object, Func<Object, void>>
>i3 : Func<string, Func<Object, void>>
>i1 : Func<Object, Func<Object, void>>
i3 = i2; // Error
>i3 = i2 : Func<Object, Func<string, void>>
>i3 : Func<string, Func<Object, void>>
>i2 : Func<Object, Func<string, void>>
i3 = i4; // Error
>i3 = i4 : Func<string, Func<string, void>>
>i3 : Func<string, Func<Object, void>>
>i4 : Func<string, Func<string, void>>
i4 = i1; // Ok
>i4 = i1 : Func<Object, Func<Object, void>>
>i4 : Func<string, Func<string, void>>
>i1 : Func<Object, Func<Object, void>>
i4 = i2; // Ok
>i4 = i2 : Func<Object, Func<string, void>>
>i4 : Func<string, Func<string, void>>
>i2 : Func<Object, Func<string, void>>
i4 = i3; // Ok
>i4 = i3 : Func<string, Func<Object, void>>
>i4 : Func<string, Func<string, void>>
>i3 : Func<string, Func<Object, void>>
interface Animal { animal: void }
>animal : void
interface Dog extends Animal { dog: void }
>dog : void
interface Cat extends Animal { cat: void }
>cat : void
interface Comparer1<T> {
compare(a: T, b: T): number;
>compare : (a: T, b: T) => number
>a : T
>b : T
}
declare let animalComparer1: Comparer1<Animal>;
>animalComparer1 : Comparer1<Animal>
declare let dogComparer1: Comparer1<Dog>;
>dogComparer1 : Comparer1<Dog>
animalComparer1 = dogComparer1; // Ok
>animalComparer1 = dogComparer1 : Comparer1<Dog>
>animalComparer1 : Comparer1<Animal>
>dogComparer1 : Comparer1<Dog>
dogComparer1 = animalComparer1; // Ok
>dogComparer1 = animalComparer1 : Comparer1<Animal>
>dogComparer1 : Comparer1<Dog>
>animalComparer1 : Comparer1<Animal>
interface Comparer2<T> {
compare: (a: T, b: T) => number;
>compare : (a: T, b: T) => number
>a : T
>b : T
}
declare let animalComparer2: Comparer2<Animal>;
>animalComparer2 : Comparer2<Animal>
declare let dogComparer2: Comparer2<Dog>;
>dogComparer2 : Comparer2<Dog>
animalComparer2 = dogComparer2; // Error
>animalComparer2 = dogComparer2 : Comparer2<Dog>
>animalComparer2 : Comparer2<Animal>
>dogComparer2 : Comparer2<Dog>
dogComparer2 = animalComparer2; // Ok
>dogComparer2 = animalComparer2 : Comparer2<Animal>
>dogComparer2 : Comparer2<Dog>
>animalComparer2 : Comparer2<Animal>
// Crate<T> is invariant in --strictFunctionTypes mode
interface Crate<T> {
item: T;
>item : T
onSetItem: (item: T) => void;
>onSetItem : (item: T) => void
>item : T
}
declare let animalCrate: Crate<Animal>;
>animalCrate : Crate<Animal>
declare let dogCrate: Crate<Dog>;
>dogCrate : Crate<Dog>
// Errors below should elaborate the reason for invariance
animalCrate = dogCrate; // Error
>animalCrate = dogCrate : Crate<Dog>
>animalCrate : Crate<Animal>
>dogCrate : Crate<Dog>
dogCrate = animalCrate; // Error
>dogCrate = animalCrate : Crate<Animal>
>dogCrate : Crate<Dog>
>animalCrate : Crate<Animal>
// Verify that callback parameters are strictly checked
declare let fc1: (f: (x: Animal) => Animal) => void;
>fc1 : (f: (x: Animal) => Animal) => void
>f : (x: Animal) => Animal
>x : Animal
declare let fc2: (f: (x: Dog) => Dog) => void;
>fc2 : (f: (x: Dog) => Dog) => void
>f : (x: Dog) => Dog
>x : Dog
fc1 = fc2; // Error
>fc1 = fc2 : (f: (x: Dog) => Dog) => void
>fc1 : (f: (x: Animal) => Animal) => void
>fc2 : (f: (x: Dog) => Dog) => void
fc2 = fc1; // Error
>fc2 = fc1 : (f: (x: Animal) => Animal) => void
>fc2 : (f: (x: Dog) => Dog) => void
>fc1 : (f: (x: Animal) => Animal) => void
// Verify that callback parameters aren't loosely checked when types
// originate in method declarations
namespace n1 {
>n1 : typeof n1
class Foo {
>Foo : Foo
static f1(x: Animal): Animal { throw "wat"; }
>f1 : (x: Animal) => Animal
>x : Animal
>"wat" : "wat"
static f2(x: Dog): Animal { throw "wat"; };
>f2 : (x: Dog) => Animal
>x : Dog
>"wat" : "wat"
}
declare let f1: (cb: typeof Foo.f1) => void;
>f1 : (cb: (x: Animal) => Animal) => void
>cb : (x: Animal) => Animal
>Foo.f1 : (x: Animal) => Animal
>Foo : typeof Foo
>f1 : (x: Animal) => Animal
declare let f2: (cb: typeof Foo.f2) => void;
>f2 : (cb: (x: Dog) => Animal) => void
>cb : (x: Dog) => Animal
>Foo.f2 : (x: Dog) => Animal
>Foo : typeof Foo
>f2 : (x: Dog) => Animal
f1 = f2;
>f1 = f2 : (cb: (x: Dog) => Animal) => void
>f1 : (cb: (x: Animal) => Animal) => void
>f2 : (cb: (x: Dog) => Animal) => void
f2 = f1; // Error
>f2 = f1 : (cb: (x: Animal) => Animal) => void
>f2 : (cb: (x: Dog) => Animal) => void
>f1 : (cb: (x: Animal) => Animal) => void
}
namespace n2 {
>n2 : typeof n2
type BivariantHack<Input, Output> = { foo(x: Input): Output }["foo"];
>BivariantHack : (x: Input) => Output
>foo : (x: Input) => Output
>x : Input
declare let f1: (cb: BivariantHack<Animal, Animal>) => void;
>f1 : (cb: (x: Animal) => Animal) => void
>cb : (x: Animal) => Animal
declare let f2: (cb: BivariantHack<Dog, Animal>) => void;
>f2 : (cb: (x: Dog) => Animal) => void
>cb : (x: Dog) => Animal
f1 = f2;
>f1 = f2 : (cb: (x: Dog) => Animal) => void
>f1 : (cb: (x: Animal) => Animal) => void
>f2 : (cb: (x: Dog) => Animal) => void
f2 = f1; // Error
>f2 = f1 : (cb: (x: Animal) => Animal) => void
>f2 : (cb: (x: Dog) => Animal) => void
>f1 : (cb: (x: Animal) => Animal) => void
}
|
