std::remove_reference

 

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

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.

Member types

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

Helper types

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

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> // std::cout
#include <type_traits> // std::is_same
 
template<class T1, class T2>
void print_is_same() {
  std::cout << std::is_same<T1, T2>() << std::endl;
}
 
int main() {
  std::cout << std::boolalpha;
 
  print_is_same<int, int>(); // true
  print_is_same<int, int &>(); // false
  print_is_same<int, int &&>(); // false
 
  print_is_same<int, std::remove_reference<int>::type>(); // true
  print_is_same<int, std::remove_reference<int &>::type>(); // true
  print_is_same<int, std::remove_reference<int &&>::type>(); // true
}

Output:

true
false
false
true
true
true

See also

is_reference (C++11)	checks if a type is either an lvalue reference or rvalue reference (class template)
add_lvalue_referenceadd_rvalue_reference (C++11)(C++11)	adds an lvalue or rvalue reference to the given type (class template)