is_class Class
The latest version of this topic can be found at is_class Class.
Tests if type is a class.
Syntax
template <class Ty>
struct is_class;
Parameters
Ty
The type to query.
Remarks
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.
Example
// 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::is_class<trivial>::value << std::endl;
std::cout << "is_class<int> == " << std::boolalpha
<< std::is_class<int>::value << std::endl;
return (0);
}
is_class<trivial> == true
is_class<int> == false
Requirements
Header: <type_traits>
Namespace: std