=== tests/cases/compiler/contextualTypingWithGenericSignature.ts ===
// If e is a FunctionExpression or ArrowFunctionExpression with no type parameters and no parameter or return type annotations, and T is a function type with EXACTLY ONE non - generic call signature, then any inferences made for type parameters referenced by the parameters of T’s call signature are fixed(section 4.12.2) and e is processed with the contextual type T, as described in section 4.9.3.

var f2: {
>f2 : <T, U>(x: T, y: U) => T

    <T, U>(x: T, y: U): T
>T : T
>U : U
>x : T
>T : T
>y : U
>U : U
>T : T

};

f2 = (x, y) => { return x }
>f2 = (x, y) => { return x } : (x: any, y: any) => any
>f2 : <T, U>(x: T, y: U) => T
>(x, y) => { return x } : (x: any, y: any) => any
>x : any
>y : any
>x : any