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=== tests/cases/compiler/varianceMeasurement.ts ===
// The type below should be invariant in T but is measured as covariant because
// we don't analyze recursive references.
interface Foo1<T> {
>Foo1 : Symbol(Foo1, Decl(varianceMeasurement.ts, 0, 0))
>T : Symbol(T, Decl(varianceMeasurement.ts, 3, 15))
x: T;
>x : Symbol(Foo1.x, Decl(varianceMeasurement.ts, 3, 19))
>T : Symbol(T, Decl(varianceMeasurement.ts, 3, 15))
y: Foo1<(arg: T) => void>;
>y : Symbol(Foo1.y, Decl(varianceMeasurement.ts, 4, 7))
>Foo1 : Symbol(Foo1, Decl(varianceMeasurement.ts, 0, 0))
>arg : Symbol(arg, Decl(varianceMeasurement.ts, 5, 11))
>T : Symbol(T, Decl(varianceMeasurement.ts, 3, 15))
}
declare const f10: Foo1<string>;
>f10 : Symbol(f10, Decl(varianceMeasurement.ts, 8, 13))
>Foo1 : Symbol(Foo1, Decl(varianceMeasurement.ts, 0, 0))
const f11: Foo1<'a'> = f10;
>f11 : Symbol(f11, Decl(varianceMeasurement.ts, 9, 5))
>Foo1 : Symbol(Foo1, Decl(varianceMeasurement.ts, 0, 0))
>f10 : Symbol(f10, Decl(varianceMeasurement.ts, 8, 13))
const f12: Foo1<unknown> = f10;
>f12 : Symbol(f12, Decl(varianceMeasurement.ts, 10, 5))
>Foo1 : Symbol(Foo1, Decl(varianceMeasurement.ts, 0, 0))
>f10 : Symbol(f10, Decl(varianceMeasurement.ts, 8, 13))
// The type below is invariant in T and is measured as such.
interface Foo2<T> {
>Foo2 : Symbol(Foo2, Decl(varianceMeasurement.ts, 10, 31))
>T : Symbol(T, Decl(varianceMeasurement.ts, 14, 15))
x: T;
>x : Symbol(Foo2.x, Decl(varianceMeasurement.ts, 14, 19))
>T : Symbol(T, Decl(varianceMeasurement.ts, 14, 15))
y: { x: (arg: T) => void, y: Foo2<(arg: T) => void>; }
>y : Symbol(Foo2.y, Decl(varianceMeasurement.ts, 15, 7))
>x : Symbol(x, Decl(varianceMeasurement.ts, 16, 6))
>arg : Symbol(arg, Decl(varianceMeasurement.ts, 16, 11))
>T : Symbol(T, Decl(varianceMeasurement.ts, 14, 15))
>y : Symbol(y, Decl(varianceMeasurement.ts, 16, 27))
>Foo2 : Symbol(Foo2, Decl(varianceMeasurement.ts, 10, 31))
>arg : Symbol(arg, Decl(varianceMeasurement.ts, 16, 37))
>T : Symbol(T, Decl(varianceMeasurement.ts, 14, 15))
}
declare const f20: Foo2<string>;
>f20 : Symbol(f20, Decl(varianceMeasurement.ts, 19, 13))
>Foo2 : Symbol(Foo2, Decl(varianceMeasurement.ts, 10, 31))
const f21: Foo2<'a'> = f20;
>f21 : Symbol(f21, Decl(varianceMeasurement.ts, 20, 5))
>Foo2 : Symbol(Foo2, Decl(varianceMeasurement.ts, 10, 31))
>f20 : Symbol(f20, Decl(varianceMeasurement.ts, 19, 13))
const f22: Foo2<unknown> = f20;
>f22 : Symbol(f22, Decl(varianceMeasurement.ts, 21, 5))
>Foo2 : Symbol(Foo2, Decl(varianceMeasurement.ts, 10, 31))
>f20 : Symbol(f20, Decl(varianceMeasurement.ts, 19, 13))
// The type below should be invariant in T but is measured as covariant because
// we don't analyze recursive references.
type Foo3<T> = {
>Foo3 : Symbol(Foo3, Decl(varianceMeasurement.ts, 21, 31))
>T : Symbol(T, Decl(varianceMeasurement.ts, 26, 10))
x: T;
>x : Symbol(x, Decl(varianceMeasurement.ts, 26, 16))
>T : Symbol(T, Decl(varianceMeasurement.ts, 26, 10))
y: Foo3<(arg: T) => void>;
>y : Symbol(y, Decl(varianceMeasurement.ts, 27, 7))
>Foo3 : Symbol(Foo3, Decl(varianceMeasurement.ts, 21, 31))
>arg : Symbol(arg, Decl(varianceMeasurement.ts, 28, 11))
>T : Symbol(T, Decl(varianceMeasurement.ts, 26, 10))
}
declare const f30: Foo3<string>;
>f30 : Symbol(f30, Decl(varianceMeasurement.ts, 31, 13))
>Foo3 : Symbol(Foo3, Decl(varianceMeasurement.ts, 21, 31))
const f31: Foo3<'a'> = f30;
>f31 : Symbol(f31, Decl(varianceMeasurement.ts, 32, 5))
>Foo3 : Symbol(Foo3, Decl(varianceMeasurement.ts, 21, 31))
>f30 : Symbol(f30, Decl(varianceMeasurement.ts, 31, 13))
const f32: Foo3<unknown> = f30;
>f32 : Symbol(f32, Decl(varianceMeasurement.ts, 33, 5))
>Foo3 : Symbol(Foo3, Decl(varianceMeasurement.ts, 21, 31))
>f30 : Symbol(f30, Decl(varianceMeasurement.ts, 31, 13))
// The type below is invariant in T and is measured as such.
type Foo4<T> = {
>Foo4 : Symbol(Foo4, Decl(varianceMeasurement.ts, 33, 31))
>T : Symbol(T, Decl(varianceMeasurement.ts, 37, 10))
x: T;
>x : Symbol(x, Decl(varianceMeasurement.ts, 37, 16))
>T : Symbol(T, Decl(varianceMeasurement.ts, 37, 10))
y: { x: (arg: T) => void, y: Foo4<(arg: T) => void>; }
>y : Symbol(y, Decl(varianceMeasurement.ts, 38, 7))
>x : Symbol(x, Decl(varianceMeasurement.ts, 39, 6))
>arg : Symbol(arg, Decl(varianceMeasurement.ts, 39, 11))
>T : Symbol(T, Decl(varianceMeasurement.ts, 37, 10))
>y : Symbol(y, Decl(varianceMeasurement.ts, 39, 27))
>Foo4 : Symbol(Foo4, Decl(varianceMeasurement.ts, 33, 31))
>arg : Symbol(arg, Decl(varianceMeasurement.ts, 39, 37))
>T : Symbol(T, Decl(varianceMeasurement.ts, 37, 10))
}
declare const f40: Foo4<string>;
>f40 : Symbol(f40, Decl(varianceMeasurement.ts, 42, 13))
>Foo4 : Symbol(Foo4, Decl(varianceMeasurement.ts, 33, 31))
const f41: Foo4<'a'> = f40;
>f41 : Symbol(f41, Decl(varianceMeasurement.ts, 43, 5))
>Foo4 : Symbol(Foo4, Decl(varianceMeasurement.ts, 33, 31))
>f40 : Symbol(f40, Decl(varianceMeasurement.ts, 42, 13))
const f42: Foo4<unknown> = f40;
>f42 : Symbol(f42, Decl(varianceMeasurement.ts, 44, 5))
>Foo4 : Symbol(Foo4, Decl(varianceMeasurement.ts, 33, 31))
>f40 : Symbol(f40, Decl(varianceMeasurement.ts, 42, 13))
// Repro from #3580
interface Fn<A, B> {
>Fn : Symbol(Fn, Decl(varianceMeasurement.ts, 44, 31))
>A : Symbol(A, Decl(varianceMeasurement.ts, 48, 13))
>B : Symbol(B, Decl(varianceMeasurement.ts, 48, 15))
(a: A): B;
>a : Symbol(a, Decl(varianceMeasurement.ts, 49, 3))
>A : Symbol(A, Decl(varianceMeasurement.ts, 48, 13))
>B : Symbol(B, Decl(varianceMeasurement.ts, 48, 15))
then<C>(next: Fn<B, C>): Fn<A, C>;
>then : Symbol(Fn.then, Decl(varianceMeasurement.ts, 49, 12))
>C : Symbol(C, Decl(varianceMeasurement.ts, 50, 7))
>next : Symbol(next, Decl(varianceMeasurement.ts, 50, 10))
>Fn : Symbol(Fn, Decl(varianceMeasurement.ts, 44, 31))
>B : Symbol(B, Decl(varianceMeasurement.ts, 48, 15))
>C : Symbol(C, Decl(varianceMeasurement.ts, 50, 7))
>Fn : Symbol(Fn, Decl(varianceMeasurement.ts, 44, 31))
>A : Symbol(A, Decl(varianceMeasurement.ts, 48, 13))
>C : Symbol(C, Decl(varianceMeasurement.ts, 50, 7))
}
declare const fn: Fn<string, number>;
>fn : Symbol(fn, Decl(varianceMeasurement.ts, 53, 13))
>Fn : Symbol(Fn, Decl(varianceMeasurement.ts, 44, 31))
// Contravariant in A
const fn1: Fn<unknown, number> = fn; // Error
>fn1 : Symbol(fn1, Decl(varianceMeasurement.ts, 56, 5))
>Fn : Symbol(Fn, Decl(varianceMeasurement.ts, 44, 31))
>fn : Symbol(fn, Decl(varianceMeasurement.ts, 53, 13))
const fn2: Fn<'a', number> = fn;
>fn2 : Symbol(fn2, Decl(varianceMeasurement.ts, 57, 5))
>Fn : Symbol(Fn, Decl(varianceMeasurement.ts, 44, 31))
>fn : Symbol(fn, Decl(varianceMeasurement.ts, 53, 13))
// Covariant in B
const fn3: Fn<string, unknown> = fn;
>fn3 : Symbol(fn3, Decl(varianceMeasurement.ts, 60, 5))
>Fn : Symbol(Fn, Decl(varianceMeasurement.ts, 44, 31))
>fn : Symbol(fn, Decl(varianceMeasurement.ts, 53, 13))
const fn4: Fn<string, 0> = fn; // Error
>fn4 : Symbol(fn4, Decl(varianceMeasurement.ts, 61, 5))
>Fn : Symbol(Fn, Decl(varianceMeasurement.ts, 44, 31))
>fn : Symbol(fn, Decl(varianceMeasurement.ts, 53, 13))
// Repro from #39947
interface I<Dummy, V> {
>I : Symbol(I, Decl(varianceMeasurement.ts, 61, 30))
>Dummy : Symbol(Dummy, Decl(varianceMeasurement.ts, 65, 12))
>V : Symbol(V, Decl(varianceMeasurement.ts, 65, 18))
c: C<Dummy, V>;
>c : Symbol(I.c, Decl(varianceMeasurement.ts, 65, 23))
>C : Symbol(C, Decl(varianceMeasurement.ts, 67, 1))
>Dummy : Symbol(Dummy, Decl(varianceMeasurement.ts, 65, 12))
>V : Symbol(V, Decl(varianceMeasurement.ts, 65, 18))
}
class C<Dummy, V> {
>C : Symbol(C, Decl(varianceMeasurement.ts, 67, 1))
>Dummy : Symbol(Dummy, Decl(varianceMeasurement.ts, 69, 8))
>V : Symbol(V, Decl(varianceMeasurement.ts, 69, 14))
declare sub: I<Dummy, V>;
>sub : Symbol(C.sub, Decl(varianceMeasurement.ts, 69, 19))
>I : Symbol(I, Decl(varianceMeasurement.ts, 61, 30))
>Dummy : Symbol(Dummy, Decl(varianceMeasurement.ts, 69, 8))
>V : Symbol(V, Decl(varianceMeasurement.ts, 69, 14))
declare covariance: V;
>covariance : Symbol(C.covariance, Decl(varianceMeasurement.ts, 70, 27))
>V : Symbol(V, Decl(varianceMeasurement.ts, 69, 14))
}
const c1: C<unknown, string> = new C<unknown, number>(); // Error
>c1 : Symbol(c1, Decl(varianceMeasurement.ts, 74, 5))
>C : Symbol(C, Decl(varianceMeasurement.ts, 67, 1))
>C : Symbol(C, Decl(varianceMeasurement.ts, 67, 1))
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