Taking D to GDC Europe - let's make this tight

[Stefan Koch via Digitalmars-d]

On Tuesday, 12 July 2016 at 16:24:07 UTC, Ola Fosheim Grøstad 
wrote:
>
>   template<class T >
>   struct has_equality<T, void_t<decltype(
>      std::declval<T&>() == std::declval<T&>()
>   )>> : std::true_type { };

It looks horrible.
And in D it is much prettier.