< cpp‎ | types
Metaprogramming library
Type traits
Type categories
Type properties
(C++11)(until C++20*)
(C++11)(deprecated in C++20)
Type trait constants
Supported operations
Relationships and property queries
Type modifications
Type transformations
(C++11)(deprecated in C++23)
(C++11)(deprecated in C++23)

(C++11)(until C++20*)(C++17)
Compile-time rational arithmetic
Compile-time integer sequences
Defined in header <type_traits>
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.


[edit] Template parameters

T - a type to check

[edit] Helper variable template

template< class T >
inline 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

operator bool
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>

[edit] 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() {}

[edit] 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

[edit] See also

checks if a type is a standard-layout type
(class template) [edit]
checks if a type is trivial
(class template) [edit]
checks if a type is a scalar type
(class template) [edit]

[edit] External links

Why is std::is_pod deprecated in C++20? — StackOverflow