On Wed, 3 Mar 2021 at 19:25, Jonathan Wakely via Libstdc++
<libstd...@gcc.gnu.org> wrote:
> Oh, except that is_scalar is surprisingly expensive to instantiate
> (its defined in a really expensive way) and since we control all uses

I'll be more than happy to write you an __is_scalar for GCC 12. :P

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