.TH "std::aligned_storage< _Len, _Align >" 3 "libstdc++" \" -*- nroff -*-
.ad l
.nh
.SH NAME
std::aligned_storage< _Len, _Align > \- Aligned storage\&.  

.SH SYNOPSIS
.br
.PP
.PP
\fR#include <type_traits>\fP
.SH "Detailed Description"
.PP 

.SS "template<size_t _Len, size_t _Align = __aligned_storage_default_alignment(_Len)>
.br
struct std::aligned_storage< _Len, _Align >"Aligned storage\&. 

The member typedef \fRtype\fP is be a POD type suitable for use as uninitialized storage for any object whose size is at most \fR_Len\fP and whose alignment is a divisor of \fR_Align\fP\&.

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

.PP
\fRtypename std::aligned_storage<sizeof(X), alignof(X)>::type m_xobj;\fP

.PP
This is wrong:

.PP
\fRstd::aligned_storage<sizeof(X), alignof(X)> m_xobj;\fP

.PP
In C++14 and later \fRstd::aligned_storage_t<sizeof(X), alignof(X)>\fP can be used to refer to the \fRtype\fP member typedef\&.

.PP
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 \fR_Len\fP (see [basic\&.align] in the C++ standard)\&.

.PP
\fBDeprecated\fP
.RS 4
Deprecated in C++23\&. Uses can be replaced by an array \fRstd::byte[_Len]\fP declared with \fRalignas(_Align)\fP\&. 
.RE
.PP


.SH "Author"
.PP 
Generated automatically by Doxygen for libstdc++ from the source code\&.