Use typeof on inline function call

I'm just wondering if there is any way to call typeof directly on a function call, in the context of typescript, for example assigning to a type.

For example, suppose we have simple identity function

const identity =<T extends unknown>(x:T)=>x;

Then can get the type for 5 by first calling identity with 5 and then typeof on the result.

const five = identity(5);

type Five = typeof five

But say we want to directly get the type for "s"

type S = typeof identity("s") //cant do this. ';' expected.(1005)
type S2 = typeof (identity("s")) //cant do this. Exported type alias 'S2' has or is using private name ''.

Wonder if there is a way, not that it matters much, but some cases could be useful.

Also if not possible would be cool to know why, is typescript expecting some particular symbol after typeof?

Thanks

You can use a combination of the utility ReturnType<Type> and instantiation expression (applied generic), like this:

TS Playground

const identity = <T extends unknown>(x: T) => x;

type S = ReturnType<typeof identity<"s">>;
   //^? type S = "s"