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Showing content from https://en.cppreference.com/w/cpp/language/../error/error_code/../../types/max_align_t.html below:

std::max_align_t - cppreference.com

typedef /* implementation-defined */ 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.

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.

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

Possible output:

• 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)

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