std::is_pod

From cppreference.com

Defined in header `<type_traits>`

template< class T > struct is_pod;		(since C++11)

If T is a PODType ("plain old data type"), that is, both trivial and standard-layout, provides the member constant value equal true. For any other type, value is false.

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)

Member types


Type	Definition

`value_type`	`bool`

`type`	std::integral_constant<bool, value>

[edit] Notes

Objects of POD types are fully compatible with the C programming language.

[edit] 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

[edit] See also


is_standard_layout (C++11)	checks if a type is standard-layout type (class template)

is_trivial (C++11)	checks if a type is trivial (class template)

Language
Standard library headers
Concepts
Utilities library
Strings library
Containers library
Algorithms library
Iterators library
Numerics library
Input/output library
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Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)