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=== tests/cases/compiler/deferredLookupTypeResolution.ts ===
// Repro from #17456
type StringContains<S extends string, L extends string> = (
>StringContains : Symbol(StringContains, Decl(deferredLookupTypeResolution.ts, 0, 0))
>S : Symbol(S, Decl(deferredLookupTypeResolution.ts, 2, 20))
>L : Symbol(L, Decl(deferredLookupTypeResolution.ts, 2, 37))
{ [K in S]: 'true' } &
>K : Symbol(K, Decl(deferredLookupTypeResolution.ts, 3, 7))
>S : Symbol(S, Decl(deferredLookupTypeResolution.ts, 2, 20))
{ [key: string]: 'false' }
>key : Symbol(key, Decl(deferredLookupTypeResolution.ts, 4, 7))
)[L]
>L : Symbol(L, Decl(deferredLookupTypeResolution.ts, 2, 37))
type ObjectHasKey<O, L extends string> = StringContains<Extract<keyof O, string>, L>
>ObjectHasKey : Symbol(ObjectHasKey, Decl(deferredLookupTypeResolution.ts, 5, 6))
>O : Symbol(O, Decl(deferredLookupTypeResolution.ts, 7, 18))
>L : Symbol(L, Decl(deferredLookupTypeResolution.ts, 7, 20))
>StringContains : Symbol(StringContains, Decl(deferredLookupTypeResolution.ts, 0, 0))
>Extract : Symbol(Extract, Decl(lib.es5.d.ts, --, --))
>O : Symbol(O, Decl(deferredLookupTypeResolution.ts, 7, 18))
>L : Symbol(L, Decl(deferredLookupTypeResolution.ts, 7, 20))
type First<T> = ObjectHasKey<T, '0'>; // Should be deferred
>First : Symbol(First, Decl(deferredLookupTypeResolution.ts, 7, 84))
>T : Symbol(T, Decl(deferredLookupTypeResolution.ts, 9, 11))
>ObjectHasKey : Symbol(ObjectHasKey, Decl(deferredLookupTypeResolution.ts, 5, 6))
>T : Symbol(T, Decl(deferredLookupTypeResolution.ts, 9, 11))
type T1 = ObjectHasKey<{ a: string }, 'a'>; // 'true'
>T1 : Symbol(T1, Decl(deferredLookupTypeResolution.ts, 9, 37))
>ObjectHasKey : Symbol(ObjectHasKey, Decl(deferredLookupTypeResolution.ts, 5, 6))
>a : Symbol(a, Decl(deferredLookupTypeResolution.ts, 11, 24))
type T2 = ObjectHasKey<{ a: string }, 'b'>; // 'false'
>T2 : Symbol(T2, Decl(deferredLookupTypeResolution.ts, 11, 43))
>ObjectHasKey : Symbol(ObjectHasKey, Decl(deferredLookupTypeResolution.ts, 5, 6))
>a : Symbol(a, Decl(deferredLookupTypeResolution.ts, 12, 24))
// Verify that mapped type isn't eagerly resolved in type-to-string operation
declare function f1<A extends string, B extends string>(a: A, b: B): { [P in A | B]: any };
>f1 : Symbol(f1, Decl(deferredLookupTypeResolution.ts, 12, 43))
>A : Symbol(A, Decl(deferredLookupTypeResolution.ts, 16, 20))
>B : Symbol(B, Decl(deferredLookupTypeResolution.ts, 16, 37))
>a : Symbol(a, Decl(deferredLookupTypeResolution.ts, 16, 56))
>A : Symbol(A, Decl(deferredLookupTypeResolution.ts, 16, 20))
>b : Symbol(b, Decl(deferredLookupTypeResolution.ts, 16, 61))
>B : Symbol(B, Decl(deferredLookupTypeResolution.ts, 16, 37))
>P : Symbol(P, Decl(deferredLookupTypeResolution.ts, 16, 72))
>A : Symbol(A, Decl(deferredLookupTypeResolution.ts, 16, 20))
>B : Symbol(B, Decl(deferredLookupTypeResolution.ts, 16, 37))
function f2<A extends string>(a: A) {
>f2 : Symbol(f2, Decl(deferredLookupTypeResolution.ts, 16, 91))
>A : Symbol(A, Decl(deferredLookupTypeResolution.ts, 18, 12))
>a : Symbol(a, Decl(deferredLookupTypeResolution.ts, 18, 30))
>A : Symbol(A, Decl(deferredLookupTypeResolution.ts, 18, 12))
return f1(a, 'x');
>f1 : Symbol(f1, Decl(deferredLookupTypeResolution.ts, 12, 43))
>a : Symbol(a, Decl(deferredLookupTypeResolution.ts, 18, 30))
}
function f3(x: 'a' | 'b') {
>f3 : Symbol(f3, Decl(deferredLookupTypeResolution.ts, 20, 1))
>x : Symbol(x, Decl(deferredLookupTypeResolution.ts, 22, 12))
return f2(x);
>f2 : Symbol(f2, Decl(deferredLookupTypeResolution.ts, 16, 91))
>x : Symbol(x, Decl(deferredLookupTypeResolution.ts, 22, 12))
}
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