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

NAME
     std::remove_reference - std::remove_reference

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

	If  the  type  T  is  a reference type, provides the member typedef type
     which is the
	type referred to by T. Otherwise type is T.

	If the program adds specializations for std::remove_reference,	the  be-
     havior is
	undefined.

Member types
	Name Definition
	type the type referred by T or T if it is not a reference

Helper types
	template<  class  T >						  (since
     C++14)
	using remove_reference_t = typename remove_reference<T>::type;

Possible implementation
	template<class T> struct remove_reference { typedef T type; };
	template<class T> struct remove_reference<T&> { typedef T type; };
	template<class T> struct remove_reference<T&&> { typedef T type; };

Example
     // Run this code

      #include <iostream>
      #include <type_traits>

      int main()
      {
	  std::cout << std::boolalpha;

	  std::cout << "std::remove_reference<int>::type is int? "
		    <<		 std::is_same<int,	      std::remove_refer-
     ence<int>::type>::value << '\n';
	  std::cout << "std::remove_reference<int&>::type is int? "
		    <<		  std::is_same<int,	      std::remove_refer-
     ence<int&>::type>::value << '\n';
	  std::cout << "std::remove_reference<int&&>::type is int? "
		    <<		 std::is_same<int,	      std::remove_refer-
     ence<int&&>::type>::value << '\n';
	  std::cout << "std::remove_reference<const int&>::type is const int? "
		    << std::is_same<const int,
				    std::remove_reference<const
     int&>::type>::value << '\n';
      }

Output:
      std::remove_reference<int>::type is int? true
      std::remove_reference<int&>::type is int? true
      std::remove_reference<int&&>::type is int? true
      std::remove_reference<const int&>::type is const int? true

See also
	is_reference	      checks  if a type is either an lvalue reference or
     rvalue
	(C++11) 	     reference
			     (class template)
	add_lvalue_reference
	add_rvalue_reference adds an lvalue or rvalue  reference  to  the  given
     type
	(C++11) 	     (class template)
	(C++11)
	remove_cvref	     combines std::remove_cv and std::remove_reference
	(C++20) 	     (class template)

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