How to extract type parameter from generic, in a generic way

[weary crown]

tickleme_pink#0

Playground Link

Preview:```ts
const x = new Set(["a", "b"])

type X = typeof x

type GenericTypeParam<T> = T extends Set<infer Y>
? Y
: never // How do I make this more generic, not just for a Set?

type XGenTypeParam = GenericTypeParam<X> //string

const data = [1, 2, 3, 2, 4, 3] as const
...```

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[primal gust]

You could try making Set in the generic a type argument, and pass in Array for the array. Not sure if it works

[earnest lark]

not possible
TypeScript doesn't support generics of generics
see #1213

[primal gust]

Ah yeah of course

We can't pass a generic