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is_class Class

Visual Studio 2008

Tests if type is a class.

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template<class Ty>
    struct is_class;
Ty

The type to query.

An instance of the type predicate holds true if the type Ty is a type defined as a class or a struct, or a cv-qualified form of one of them, otherwise it holds false.

 

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// std_tr1__type_traits__is_class.cpp 
// compile with: /EHsc 
#include <type_traits> 
#include <iostream> 
 
struct trivial 
    { 
    int val; 
    }; 
 
int main() 
    { 
    std::cout << "is_class<trivial> == " << std::boolalpha 
        << std::tr1::is_class<trivial>::value << std::endl; 
    std::cout << "is_class<int> == " << std::boolalpha 
        << std::tr1::is_class<int>::value << std::endl; 
 
    return (0); 
    }
is_class<trivial> == true is_class<int> == false

Header: <type_traits>

Namespace: std::tr1

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