=== tests/cases/compiler/inferentialTypingWithFunctionType.ts ===
declare function map<T, U>(x: T, f: (s: T) => U): U;
>map : <T, U>(x: T, f: (s: T) => U) => U
>T : T
>U : U
>x : T
>T : T
>f : (s: T) => U
>s : T
>T : T
>U : U
>U : U

declare function identity<V>(y: V): V;
>identity : <V>(y: V) => V
>V : V
>y : V
>V : V
>V : V

var s = map("", identity);
>s : string
>map("", identity) : string
>map : <T, U>(x: T, f: (s: T) => U) => U
>"" : string
>identity : <V>(y: V) => V