Makes integral constant fromt type and value.
template <class Ty, Ty v>
struct integral_constant;
Parameters
Ty
The type of the constant.Ty
The value of the constant.
Remarks
The template class, when specialized with an integral type and a value of that type, represents an object that holds a constant of that integral type with the specified value.
Example
// std_tr1__type_traits__integral_constant.cpp
// compile with: /EHsc
#include <type_traits>
#include <iostream>
int main()
{
std::cout << "integral_constant<int, 5> == "
<< std::integral_constant<int, 5>::value << std::endl;
std::cout << "integral_constant<bool, false> == " << std::boolalpha
<< std::integral_constant<bool, false>::value << std::endl;
return (0);
}
integral_constant<int, 5> == 5 integral_constant<bool, false> == false
Requirements
Header: <type_traits>
Namespace: std