Re: [go-nuts] Is it possible to "extract" the generic [T] from a reflected type ?

[Ian Lance Taylor]

On Tue, Apr 9, 2024 at 9:41 AM Mihai Barbu <ad...@hopz.com> wrote:
>
> I need to call some generic functions with types that are now known at 
> compile time. Is it possible to do this?
>  See the code below (vastly reduced).
>
> // fv is a function that returns an unknown type
> func Do(fv reflect.Value){
>  // get the first returned type by function fv
>   vt := fv.Type().Out(0)
>    // how to call `Hello` with `v` ?
>   // Obviously the code below is incorrect
>     Hello[vt]()
> }
>
> func Hello[T any](){
>  // do something with T
>  json.Marshal(new(T))
> }

This is not possible.  Sorry.

Ian

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