std::aligned_storage< _Len, _Align >(3)               Library Functions Manual

NAME
       std::aligned_storage< _Len, _Align > - Aligned storage.


SYNOPSIS
       #include <type_traits>

Detailed Description
   template<size_t _Len, size_t _Align =
       __aligned_storage_default_alignment(_Len)>
       struct std::aligned_storage< _Len, _Align >"Aligned storage.

       The member typedef type is be a POD type suitable for use as
       uninitialized storage for any object whose size is at most _Len and
       whose alignment is a divisor of _Align.


       It is important to use the nested type as uninitialized storage, not
       the std::aligned_storage type itself which is an empty class with
       1-byte alignment. So this is correct:


       typename std::aligned_storage<sizeof(X), alignof(X)>::type m_xobj;


       This is wrong:


       std::aligned_storage<sizeof(X), alignof(X)> m_xobj;


       In C++14 and later std::aligned_storage_t<sizeof(X), alignof(X)> can be
       used to refer to the type member typedef.


       The default value of _Align is supposed to be the most stringent
       fundamental alignment requirement for any C++ object type whose size is
       no greater than _Len (see [basic.align] in the C++ standard).


       Deprecated
           Deprecated in C++23. Uses can be replaced by an array
           std::byte[_Len] declared with alignas(_Align).



Author
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                                   libstdc++
                                       std::aligned_storage< _Len, _Align >(3)