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std::is_pod(3) C++ Standard Libary std::is_pod(3) NAME std::is_pod - std::is_pod Synopsis Defined in header <type_traits> template< class T > (since C++11) struct is_pod; (deprecated in C++20) std::is_pod is a UnaryTypeTrait. If T is a POD type ("plain old data type"), provides the member con- stant value equal to true. For any other type, value is false. If std::remove_all_extents_t<T> is an incomplete type and not (pos- sibly cv-qualified) void, the behavior is undefined. If the program adds specializations for std::is_pod or std::is_pod_v, the behavior is undefined. Template parameters T - a type to check Helper variable template template< class T > (since C++17) inline constexpr bool is_pod_v = is_pod<T>::value; (deprecated in C++20) Inherited from std::integral_constant Member constants value true if T is a POD type, false otherwise [static] (public static member constant) Member functions operator bool converts the object to bool, returns value (public member function) operator() returns value (C++14) (public member function) Member types Type Definition value_type bool type std::integral_constant<bool, value> Example // Run this code #include <type_traits> struct A { int m; }; static_assert(std::is_pod_v<A> == true); class B: public A { int m; }; static_assert(std::is_pod_v<B> == false); struct C { virtual void foo(); }; static_assert(std::is_pod_v<C> == false); int main() {} Defect reports The following behavior-changing defect reports were applied retroac- tively to previously published C++ standards. DR Applied to Behavior as published Correct be- havior LWG 2015 C++11 T could be an array of incomplete the behavior is class type with unknown bound undefined in this case See also is_standard_layout checks if a type is a standard-layout type (C++11) (class template) is_trivial checks if a type is trivial (C++11) (class template) is_scalar checks if a type is a scalar type (C++11) (class template) External links Why is std::is_pod deprecated in C++20? StackOverflow http://cppreference.com 2024.06.10 std::is_pod(3)
NAME | Synopsis | Template parameters | Member constants | Member functions | Member types | Example | See also | External links
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