[generics] Bugs + something else

[p...@pjebs.com.au]

1. 

For this Go 2 snippet: https://go2goplay.golang.org/p/vbfBBmjxaMi

Why can't I use square brackets when calling the constructor?

2. Variadic `any` types + allowing a called function() to be used as an argument + return arguments types and numbers based on input arguments

I want to implement a `must` function which I proposed here: https://github.com/golang/go/issues/32219

Based on the current generics proposal, I don't seem to be able to do so.

Am I missing something or is must outside its ambit?

-@pjebs

[Ian Lance Taylor]

On Mon, Aug 31, 2020 at 5:49 PM p...@pjebs.com.au <p...@pjebs.com.au> wrote:
>
> 1.
> For this Go 2 snippet: https://go2goplay.golang.org/p/vbfBBmjxaMi
>
> Why can't I use square brackets when calling the constructor?

Sorry, the Go 2 playground isn't fully up to date.

> 2. Variadic `any` types + allowing a called function() to be used as an argument + return arguments types and numbers based on input arguments
>
> I want to implement a `must` function which I proposed here: https://github.com/golang/go/issues/32219
>
> Based on the current generics proposal, I don't seem to be able to do so.
> Am I missing something or is must outside its ambit?

The current design draft does not support variadic type parameters.
Maybe someday.

Ian

[Jake Montgomery]

On Monday, August 31, 2020 at 8:49:00 PM UTC-4, p...@pjebs.com.au wrote:

1. 

For this Go 2 snippet: https://go2goplay.golang.org/p/vbfBBmjxaMi

Why can't I use square brackets when calling the constructor?

 

This seems  to be fixed now: https://go2goplay.golang.org/p/cpKKg5qG5Ve

[Anderson Queiroz]

you cannot mix parenthesis and square brackets for type parameters in the same file, you did it on your first example.