__traits isCopyable vs isPOD

[Paul Backus]

On Monday, 28 November 2022 at 23:11:37 UTC, Per Nordlöw wrote:
> the real question I had is whether one should use `isPOD` 
> instead of `isCopyable` in cases
>
> ```d
>             static if (__traits(isCopyable, Element))
>                 insertAt(element, index);
>             else
>                 insertAt(move(element), index);
> ```
>
> because that avoids any potential call to the copy-constructor 
> and destructor of `Element`. Afaict, one should.

If your goal is to avoid calling the copy constructor (and, I 
assume, to avoid unnecessary instantiations of `move`), then 
yeah, `isPOD` is the one you want.