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std::is_enum(3) 	       C++ Standard Libary		 std::is_enum(3)

NAME
     std::is_enum - std::is_enum

Synopsis
	Defined in header <type_traits>
	template< class T >		 (since C++11)
	struct is_enum;

	std::is_enum is a UnaryTypeTrait.

	Checks	whether  T  is an enumeration type. Provides the member constant
     value which is
	equal to true, if T is an enumeration type. Otherwise, value is equal to
     false.

	If the program adds specializations for std::is_enum or  std::is_enum_v,
     the behavior
	is undefined.

Template parameters
	T - a type to check

	Helper variable template

	template< class T >				      (since C++17)
	inline constexpr bool is_enum_v = is_enum<T>::value;

     Inherited from std::integral_constant

Member constants
	value	 true if T is an enumeration type, false otherwise
	[static] (public static member constant)

Member functions
	operator bool converts the object to bool, returns value
		      (public member function)
	operator()    returns value
	(C++14)       (public member function)

Member types
	Type	   Definition
	value_type bool
	type	   std::integral_constant<bool, value>

Example
     // Run this code

      #include <type_traits>

      struct A { enum E {}; };
      static_assert(std::is_enum_v<A> == false);
      static_assert(std::is_enum_v<A::E> == true);

      enum E {};
      static_assert(std::is_enum_v<E> == true);

      enum class Ec : int {};
      static_assert(std::is_enum_v<Ec> == true);

      static_assert(std::is_enum_v<int> == false);

      int main() {}

See also
	is_integral    checks if a type is an integral type
	(C++11)        (class template)
	is_arithmetic  checks if a type is an arithmetic type
	(C++11)        (class template)
	is_scalar      checks if a type is a scalar type
	(C++11)        (class template)
	is_scoped_enum checks if a type is a scoped enumeration type
	(C++23)        (class template)

http://cppreference.com 	   2024.06.10			 std::is_enum(3)
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