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template<class T>
struct is_scoped_enum
: true_type-or-false_type { };
Inherits: If T is a (possibly cv-qualified)
scoped enumeration type (enum class but not enum),
then inherits from true_type,
otherwise inherits from false_type.
Header: #include
<boost/type_traits/is_scoped_enum.hpp>
Compiler Compatibility: All current compilers are supported by this trait.
Examples:
Given:
enum class color { red, blue };andenum fruit { apple, orange };
is_scoped_enum<color>inherits fromtrue_type.
is_scoped_enum<fruit>inherits fromfalse_type.
is_scoped_enum<color const>::typeis the typetrue_type.
is_scoped_enum<color>::valueis an integral constant expression that evaluates to true.
is_scoped_enum<color&>::valueis an integral constant expression that evaluates to false.
is_scoped_enum<color*>::valueis an integral constant expression that evaluates to false.
is_scoped_enum<T>::value_typeis the typebool.