On Wed, Aug 11, 2021 at 7:45 AM tapi...@gmail.com <tapir....@gmail.com> wrote:
>
> // main.go
> package main
>
> func main() {
> var s = []int{1, 2, 3}
> var pa = (*[2]int)(s[1:])
> println(pa[1])
> }
>
> $ go run main.go
> # command-line-arguments
> ./main.go:6:23: cannot convert s[1:] (type []int) to type *[2]int:
> conversion of slices to array pointers only supported as of -lang=go1.17
>
> Is it the deliberate design? Shouldn't the lang value be the highest language
> version supported by the current used toolchain?
This is deliberate design. The idea is that if you put "go 1.16" in
your go.mod file you can reasonably assume that your package will be
usable by people who are still using Go 1.16. If you don't care
whether those people can build your package, go ahead and change to
1.17.
Ian
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