nonNullableReduction.symbols

=== tests/cases/compiler/nonNullableReduction.ts ===
// Repros from #43425

type Transform1<T> = ((value: string) => T) | (string extends T ? undefined : never);
>Transform1 : Symbol(Transform1, Decl(nonNullableReduction.ts, 0, 0))
>T : Symbol(T, Decl(nonNullableReduction.ts, 2, 16))
>value : Symbol(value, Decl(nonNullableReduction.ts, 2, 23))
>T : Symbol(T, Decl(nonNullableReduction.ts, 2, 16))
>T : Symbol(T, Decl(nonNullableReduction.ts, 2, 16))

type Transform2<T> = string extends T ? ((value: string) => T) | undefined : (value: string) => T;
>Transform2 : Symbol(Transform2, Decl(nonNullableReduction.ts, 2, 85))
>T : Symbol(T, Decl(nonNullableReduction.ts, 3, 16))
>T : Symbol(T, Decl(nonNullableReduction.ts, 3, 16))
>value : Symbol(value, Decl(nonNullableReduction.ts, 3, 42))
>T : Symbol(T, Decl(nonNullableReduction.ts, 3, 16))
>value : Symbol(value, Decl(nonNullableReduction.ts, 3, 78))
>T : Symbol(T, Decl(nonNullableReduction.ts, 3, 16))

function test<T>(f1: Transform1<T>, f2: Transform2<T>) {
>test : Symbol(test, Decl(nonNullableReduction.ts, 3, 98))
>T : Symbol(T, Decl(nonNullableReduction.ts, 5, 14))
>f1 : Symbol(f1, Decl(nonNullableReduction.ts, 5, 17))
>Transform1 : Symbol(Transform1, Decl(nonNullableReduction.ts, 0, 0))
>T : Symbol(T, Decl(nonNullableReduction.ts, 5, 14))
>f2 : Symbol(f2, Decl(nonNullableReduction.ts, 5, 35))
>Transform2 : Symbol(Transform2, Decl(nonNullableReduction.ts, 2, 85))
>T : Symbol(T, Decl(nonNullableReduction.ts, 5, 14))

    f1?.("hello");
>f1 : Symbol(f1, Decl(nonNullableReduction.ts, 5, 17))

    f2?.("hello");
>f2 : Symbol(f2, Decl(nonNullableReduction.ts, 5, 35))
}

function f1<T>(x: T | (string extends T ? null | undefined : never)) {
>f1 : Symbol(f1, Decl(nonNullableReduction.ts, 8, 1))
>T : Symbol(T, Decl(nonNullableReduction.ts, 10, 12))
>x : Symbol(x, Decl(nonNullableReduction.ts, 10, 15))
>T : Symbol(T, Decl(nonNullableReduction.ts, 10, 12))
>T : Symbol(T, Decl(nonNullableReduction.ts, 10, 12))

    let z = x!;  // NonNullable<T>
>z : Symbol(z, Decl(nonNullableReduction.ts, 11, 7))
>x : Symbol(x, Decl(nonNullableReduction.ts, 10, 15))
}

function f2<T, U extends null | undefined>(x: T | U) {
>f2 : Symbol(f2, Decl(nonNullableReduction.ts, 12, 1))
>T : Symbol(T, Decl(nonNullableReduction.ts, 14, 12))
>U : Symbol(U, Decl(nonNullableReduction.ts, 14, 14))
>x : Symbol(x, Decl(nonNullableReduction.ts, 14, 43))
>T : Symbol(T, Decl(nonNullableReduction.ts, 14, 12))
>U : Symbol(U, Decl(nonNullableReduction.ts, 14, 14))

    let z = x!;  // NonNullable<T>
>z : Symbol(z, Decl(nonNullableReduction.ts, 15, 7))
>x : Symbol(x, Decl(nonNullableReduction.ts, 14, 43))
}