[PATCH] libstdc++/77641 fix std::variant for literal types

[Jonathan Wakely]

On 22/09/16 09:37 +0100, Jonathan Wakely wrote:
>On 22/09/16 09:45 +0300, Ville Voutilainen wrote:
>>This problem is not introduced by the latest patch, but it's something that
>>we should look at anyway. There's been recent discussion about what
>>assignments do with variants that hold references. Consider this:
>>
>>#include <variant>
>>
>>int main()
>>{
>>  float f1 = 1.0f, f2 = 2.0f;
>>
>>  std::variant<float&> v1(f1);
>>
>>  v1 = f2; // #1
>>}
>
>It works if we add this to _Reference_storage:
>
>     template<typename _Tp>
>	_Reference_storage&
>	operator=(_Tp&& __t)
>	{
>	  _M_storage = std::forward<_Tp>(__t);
>	  return *this;
>	}
>
>I'm not sure if that's the right fix.

Oh I missed Tim's patch for this that he already posted.