std::remove_reference

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

#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>() << '\n';
}
  
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

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

std::remove_reference

Member types

Helper types

Possible implementation

Example

See also