std::is_pod - cppreference.com

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`template< class T > struct is_pod;`		(since C++11) (deprecated in C++20)

std::is_pod is a UnaryTypeTrait.

If T is a POD type ("plain old data type"), provides the member constant value equal to true. For any other type, value is false.

If std::remove_all_extents_t<T> is an incomplete type and not (possibly 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

Helper variable template

`template< class T > constexpr bool is_pod_v = is_pod<T>::value;`		(since C++17) (deprecated in C++20)

Inherited from std::integral_constant

Member constants

true if T is a POD type, false otherwise
(public static member constant)

Member functions

	converts the object to `bool`, returns `value` (public member function)
	returns `value` (public member function)

Member types

Type	Definition
`value_type`	`bool`
`type`	`std::integral_constant<bool, value>`

Example

#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 retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 2015	C++11	`T` could be an array of incomplete class type with unknown bound	the behavior is undefined in this case