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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) 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. The behavior is undefined if std::remove_all_extents_t<T> is an in- complete type and not (possibly cv-qualified) void. The behavior of a program that adds specializations for is_pod or is_pod_v (since C++17) 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 <iostream> #include <type_traits> struct A { int m; }; struct B { int m1; private: int m2; }; struct C { virtual void foo(); }; int main() { std::cout << std::boolalpha; std::cout << std::is_pod<A>::value << '\n'; std::cout << std::is_pod<B>::value << '\n'; std::cout << std::is_pod<C>::value << '\n'; } Output: true false false 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) http://cppreference.com 2022.07.31 std::is_pod(3)
NAME | Synopsis | Template parameters | Member constants | Member functions | Member types | Example | Output: | See also
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