std::is_pod

 

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

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.

The behavior is undefined if std::remove_all_extents_t<T> is an incomplete 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 > inline constexpr bool is_pod_v = is_pod<T>::value;		(since C++17) (deprecated in C++20)

Inherited from std::integral_constant

Member constants

value [static]

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)
operator() (C++14)	returns value (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 (C++11)	checks if a type is a standard-layout type (class template)
is_trivial (C++11)	checks if a type is trivial (class template)