Why does D not have generics?

[Ola Fosheim Grøstad]

On Tuesday, 12 January 2021 at 22:23:51 UTC, Paul Backus wrote:
> You have written a generic function that accepts any type 
> (unconstrained `T`), but fails to instantiate for most of them 
> (e.g. `pop_second!int` would not compile). In a language like 
> Rust or Java with type-checked generics, the compiler would 
> reject this function definition.

Hm? pop_second requires StackConcept!(T,E) ?