is_pod Class

Tests if type is a POD.

template<class Ty>
    struct is_pod;

Parameters

• Ty
  The type to query.

Remarks

An instance of the type predicate holds true if the type Ty is a scalar type, a POD aggregate type, or a cv-qualified form of one of them, or an array of such a type, otherwise it holds false.

A POD aggregate type is a class, struct, or union whose non-static data members are all scalar types or POD aggregates, and that has no references, no user-defined copy assignment operator, and no user-defined destructor.

Example

 

// std_tr1__type_traits__is_pod.cpp 
// compile with: /EHsc 
#include <type_traits> 
#include <iostream> 
 
struct trivial 
    { 
    int val; 
    }; 
 
struct throws 
    { 
    throws() throw(int) 
        { 
        } 
 
    throws(const throws&) throw(int) 
        { 
        } 
 
    throws& operator=(const throws&) throw(int) 
        { 
        } 
 
    int val; 
    }; 
 
int main() 
    { 
    std::cout << "is_pod<trivial> == " << std::boolalpha 
        << std::tr1::is_pod<trivial>::value << std::endl; 
    std::cout << "is_pod<int> == " << std::boolalpha 
        << std::tr1::is_pod<int>::value << std::endl; 
    std::cout << "is_pod<throws> == " << std::boolalpha 
        << std::tr1::is_pod<throws>::value << std::endl; 
 
    return (0); 
    } 
 

is_pod<trivial> == true is_pod<int> == true is_pod<throws> == false

Requirements

Header: <type_traits>

Namespace: std::tr1

See Also

Reference

<type_traits>