std::max_align_t
Defined in header <cstddef> | ||
|---|---|---|
typedef /* implementation-defined */ max_align_t; | (since C++11) |
std::max_align_t is a standard-layout TrivialType(until C++26)TriviallyCopyable type(since C++26) whose alignment requirement is at least as strict (as large) as that of every scalar type.
std::is_trivially_default_constructible_v<std::max_align_t> is true.
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
#include <cstddef>
#include <iostream>
int main()
{
std::cout << alignof(std::max_align_t) << '\n';
}
Possible output:
16
References
- C++23 standard (ISO/IEC 14882:2024):
- 17.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 504-505)
- C++20 standard (ISO/IEC 14882:2020):
- 17.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 507-508)
- C++17 standard (ISO/IEC 14882:2017):
- 21.2.4 Sizes, alignments, and offsets [support.types.layout] (p: 479)
- C++14 standard (ISO/IEC 14882:2014):
- 18.2 Types [support.types] (p: 443-444)
- C++11 standard (ISO/IEC 14882:2011):
- 18.2 Types [support.types] (p: 454-455)
See also
alignof (C++11) | queries alignment requirements of a type (operator) |
|
(C++11) | obtains the type's alignment requirements (class template) |
|
(C++11) | checks if a type is a scalar type (class template) |
C documentation for max_align_t |
|
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