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std::max_align_t(3) C++ Standard Libary std::max_align_t(3) NAME std::max_align_t - std::max_align_t Synopsis Defined in header <cstddef> typedef /*implementation-defined*/ max_align_t; (since C++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. std::max_align_t is usually synonymous with the largest scalar type, which is long double on most platforms, and its alignment requirement is either 8 or 16. Example // Run this code #include <iostream> #include <cstddef> int main() { std::cout << alignof(std::max_align_t) << '\n'; } Possible output: 16 References * C++20 standard (ISO/IEC 14882:2020): * 17.2.4 Sizes, alignments, and offsets [sup- port.types.layout] (p: 507-508) * C++17 standard (ISO/IEC 14882:2017): * 21.2.4 Sizes, alignments, and offsets [sup- port.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 operator(C++11) queries alignment requirements of a type alignment_of obtains the type's alignment requirements (C++11) (class template) is_scalar checks if a type is a scalar type (C++11) (class template) http://cppreference.com 2022.07.31 std::max_align_t(3)
NAME | Synopsis | Notes | Example | Possible output: | References | See also
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