##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# std::is_pod

From cppreference.com
< cpp‎ | types

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.

The behavior is undefined if std::remove_all_extents_t<T> is an incomplete type and not (possibly cv-qualified) void.

### [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)

[edit]

## 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>

### [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) [edit]
is_trivial (C++11) | checks if a type is trivial (class template) [edit]

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/types/is_pod&oldid=90989"