On 07/01/2023 19:52, Frederick Virchanza Gotham via Std-Proposals wrote:
>
> When I first started wondering about the implications of this core
> language change, I first thought that it might break old code that
> relies on SFINAE, but I tried writing a template function with
> "std::enable_if" and I don't actually think that this change to the
> core language would break any SFINAE achieved with "std::enable_if".


This would break:

> template <typename T, typename Enable = void>
> constexpr bool x = false;
>
> template <typename T>
> constexpr bool x <T, std::void_t<decltype(std::declval<T>()->size())>> = true;
>
> static_assert(!x<std::string **>);




My 2 c,

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