Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
template <class T>
struct is_enum : public true_type-or-false_type {};
Inherits: If T is a (possibly cv-qualified) enum type then inherits from true_type, otherwise inherits from false_type.
C++ Standard Reference: 3.9.2 and 7.2.
Header: #include
<boost/type_traits/is_enum.hpp>
or #include <boost/type_traits.hpp>
Compiler Compatibility: All current compilers are supported by this trait.
Examples:
Given:
enum my_enum { one, two };
is_enum<my_enum>inherits fromtrue_type.
is_enum<my_enum const>::typeis the typetrue_type.
is_enum<my_enum>::valueis an integral constant expression that evaluates to true.
is_enum<my_enum&>::valueis an integral constant expression that evaluates to false.
is_enum<my_enum*>::valueis an integral constant expression that evaluates to false.
is_enum<T>::value_typeis the typebool.