std:: max_align_t

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';
}

16

References