[Bug libstdc++/108619] Compilation error if the construct method of the allocator isn't implemented and the detructor of value_type is private
redi at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Tue Jan 31 22:07:07 GMT 2023
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108619
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Keywords| |rejects-valid
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The bug is here in std::allocator_traits:
template<typename _Tp, typename... _Args>
static _GLIBCXX14_CONSTEXPR
_Require<__and_<__not_<__has_construct<_Tp, _Args...>>,
is_constructible<_Tp, _Args...>>>
_S_construct(_Alloc&, _Tp* __p, _Args&&... __args)
It uses std::is_constructible, which is false because std::is_destructible<a>
is false.
We need to check if a placement new expression is valid, so that we don't
consider the destructor.
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