std::remove_reference
From cppreference.com
| Defined in header <type_traits>
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| 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
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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>() << '\n'; } int main() { std::cout << std::boolalpha; print_is_same<int, int>(); print_is_same<int, int &>(); print_is_same<int, int &&>(); print_is_same<int, std::remove_reference<int>::type>(); print_is_same<int, std::remove_reference<int &>::type>(); print_is_same<int, std::remove_reference<int &&>::type>(); }
Output:
true false false true true true
See also
| (C++11) |
checks if a type is either lvalue reference or rvalue reference (class template) |
| (C++11)(C++11) |
adds lvalue or rvalue reference to the given type (class template) |
| (C++20) |
combines std::remove_cv and std::remove_reference (class template) |