std::max_align_t - cppreference.com (original) (raw)
| | | | | ----------------------------------------------------- | | ------------- | | 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_vstd::max\_align\_t\ is true.
[edit] 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.
[edit] Example
#include #include int main() { std::cout << alignof(std::max_align_t) << '\n'; }
Possible output:
[edit] 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)