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Learn more about: is_enum Class |
is_enum Class |
11/04/2016 |
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df3b00b7-4f98-4b3a-96ce-10ad958ee69c |
Tests if type is an enumeration.
template <class Ty>
struct is_enum;
Ty
The type to query.
An instance of the type predicate holds true if the type Ty is an enumeration type or a cv-qualified
form of an enumeration type, otherwise it holds false.
// std__type_traits__is_enum.cpp
// compile with: /EHsc
#include <type_traits>
#include <iostream>
struct trivial
{
int val;
};
enum color {
red, greed, blue};
int main()
{
std::cout << "is_enum<trivial> == " << std::boolalpha
<< std::is_enum<trivial>::value << std::endl;
std::cout << "is_enum<color> == " << std::boolalpha
<< std::is_enum<color>::value << std::endl;
std::cout << "is_enum<int> == " << std::boolalpha
<< std::is_enum<int>::value << std::endl;
return (0);
}
is_enum<trivial> == false
is_enum<color> == true
is_enum<int> == false
Header: <type_traits>
Namespace: std