[v3 PATCH] Implement LWG 2758.

[Jonathan Wakely]

On 16/08/16 16:15 +0300, Ville Voutilainen wrote:
>On 16 August 2016 at 15:58, Jonathan Wakely <jwakely@redhat.com> wrote:
>> This patch constrains the new overloads using:
>>
>>  template<typename _Tp, typename _Res>
>>    using _If_sv = enable_if_t<
>>      __and_<is_convertible<const _Tp&, __sv_type>,
>>              __not_<is_convertible<const _Tp&, const _CharT*>>>::value,
>>      _Res>;
>>
>> so that anything convertible to const _CharT* goes to the same
>> overload as would have been chosen prior to C++17.
>>
>> I'm testing this now but won't commit it until it's clear this is a
>> sensible resolution for LWG 2758.
>
>
>It's crystal clear to me that it is, ship it.

Here's what I've committed, adding tests for the other functions too.

Tested ppx64le-linux, committed to trunk.


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