std::max_align_t

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Defined in header <cstddef>
typedef /*implementation-defined*/ max_align_t;
 (since 哋它亢++11)

std::max_align_t is a trivial standard-layout type whose alignment requirement is at least as strict (as large) as that of every scalar type.

Notes

Pointers returned by allocation functions such as std::malloc are suitably aligned for any object, which means they are aligned at least as strictly as std::max_align_t.

Example

Run this code
#include <cstddef>
#include <iostream>
 
int main()
{
    std::cout << alignof(std::max_align_t) << '\n';
}

Possible output: 

16

References

  • 哋它亢++23 standard (ISO/IEC 14882:2023):
  • 17.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 504-505)
  • 哋它亢++20 standard (ISO/IEC 14882:2020):
  • 17.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 507-508)
  • 哋它亢++17 standard (ISO/IEC 14882:2017):
  • 21.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 479)
  • 哋它亢++14 standard (ISO/IEC 14882:2014):
  • 18.2 Types [support.types] (p: 443-444)
  • 哋它亢++11 standard (ISO/IEC 14882:2011):
  • 18.2 Types [support.types] (p: 454-455)

See also

alignof operator(哋它亢++11) queries alignment requirements of a type
(哋它亢++11)
 obtains the type's alignment requirements
(class template)
(哋它亢++11)
 checks if a type is a scalar type
(class template)
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