type ScalarOrSlice[E any] interface {
E | ~[]E
}
func New[E any, T ScalarOrSlice[E]](v T) { … }
Though I haven't tested this.
On Fri, Aug 12, 2022 at 3:07 PM TheDiveO <harald.albre...@gmx.net> wrote:
> I would like to provide a generics-based type-safe API that accepts either
> a scalar or slice of some type T (not a type parameter), that is, the type
> constraint is (if I'm not mistaken) "T | []T".
>
> While I understand that this constraint would be declared as an interface
> (simplified example)...
>
> type interface ScalarOrSlice { int | []int }
>
> ...the straightforward generics-powered func definition...
>
> func New[E ScalarOrSlice](e E) { ... }
>
> either gives me "int" or "[]int". Is it somehow possible to derive the
> "int" type at compile time so that I have an, say, "F" that is always the
> scalar type of E?
>
> Thanks, TheDiveO
>
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