aligned_storage Class

Makes suitably aligned type.

template<std::size_t Len, std::size_t Align>
    struct aligned_storage {
        typedef aligned-type type;
        };

template<size_t _Len,
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 nested typedef type is a synonym for a POD type with alignment Align and size Len. Align must be equal to alignment_of<Ty1>::value for some type Ty1.

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

Reference

<type_traits>

alignment_of Class

Other Resources

<type_traits> Members