std::is_unsigned
From Cppreference
| Defined in header <type_traits>
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| template< class T >
struct is_unsigned; |
(C++11 feature) | |
If T is an unsigned arithmetic type, provides the member constant value equal true. For any other type, value is false.
Contents |
Inherited from std::integral_constant
Member constants
| value | true if T is an unsigned arithmetic type , false otherwise (public static member constant) |
Member functions
| operator bool | converts the object to bool, returns value (public member function) |
Member types
| Type | Definition |
| value_type | bool |
| type | std::integral_constant<bool, value> |
[edit] Example
#include <iostream> #include <type_traits> class A {}; int main() { std::cout << std::boolalpha; std::cout << std::is_unsigned<A>::value << '\n'; std::cout << std::is_unsigned<float>::value << '\n'; std::cout << std::is_unsigned<signed int>::value << '\n'; std::cout << std::is_unsigned<unsigned int>::value << '\n'; }
Output:
false false false true
[edit] See also
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checks if a type is signed arithmetic type (class template) |
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checks if a type is floating-point type (class template) |
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checks if a type is integral type (class template) |
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