aligned_storage Class

Makes suitably aligned type.

Syntax

template <std::size_t Len, std::size_t Align>
struct aligned_storage;

template <std::size_t Len, std::size_t Align = alignment_of<max_align_t>::value>
using aligned_storage_t = typename aligned_storage<Len, Align>::type;

Parameters

Len
The object size.

Align
The object alignment.

Remarks

The template member typedef type is a synonym for a POD type with alignment Align and size Len. Align must be equal to alignment_of<T>::value for some type T, or to the default alignment.

Example

#include <type_traits>
#include <iostream>

typedef std::aligned_storage<sizeof (int),
    std::alignment_of<double>::value>::type New_type;
int main()
    {
    std::cout << "alignment_of<int> == "
        << std::alignment_of<int>::value << std::endl;
    std::cout << "aligned to double == "
        << std::alignment_of<New_type>::value << std::endl;

    return (0);
    }

alignment_of<int> == 4
aligned to double == 8

Requirements

Header: <type_traits>

Namespace: std

See also

<type_traits>
alignment_of Class