| description | Learn more about: is_unsigned Class | ||
|---|---|---|---|
| title | is_unsigned Class | ||
| ms.date | 11/04/2016 | ||
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| ms.assetid | ba5bec3d-796b-4e54-8595-a3941ec6a8dc |
Tests if type is unsigned integer.
template <class Ty>
struct is_unsigned;Ty
The type to query.
An instance of the type predicate holds true if the type Ty is an unsigned integral type or a cv-qualified unsigned integral type, otherwise it holds false.
// std__type_traits__is_unsigned.cpp
// compile with: /EHsc
#include <type_traits>
#include <iostream>
struct trivial
{
int val;
};
int main()
{
std::cout << "is_unsigned<trivial> == " << std::boolalpha
<< std::is_unsigned<trivial>::value << std::endl;
std::cout << "is_unsigned<int> == " << std::boolalpha
<< std::is_unsigned<int>::value << std::endl;
std::cout << "is_unsigned<unsigned int> == " << std::boolalpha
<< std::is_unsigned<unsigned int>::value << std::endl;
std::cout << "is_unsigned<float> == " << std::boolalpha
<< std::is_unsigned<float>::value << std::endl;
return (0);
}is_unsigned<trivial> == false
is_unsigned<int> == false
is_unsigned<unsigned int> == true
is_unsigned<float> == false
Header: <type_traits>
Namespace: std