std::remove_cvref

Defined in header `<type_traits>`
template< class T > struct remove_cvref;		(since C++20)

If the type T is a reference type, provides the member typedef type which is the type referred to by T with its topmost cv-qualifiers removed. Otherwise type is T with its topmost cv-qualifiers removed.

If the program adds specializations for std::remove_cvref, the behavior is undefined.

Member types

Name	Description
`type`	the type referred by `T` or `T` itself if it is not a reference, with top-level cv-qualifiers removed

Helper types

template< class T >
using remove_cvref_t = remove_cvref<T>::type;

(since C++20)

Possible implementation

template<class T>
struct remove_cvref
{
    using type = std::remove_cv_t<std::remove_reference_t<T>>;
};

Notes

Feature-test macro	Value	Std	Feature
`__cpp_lib_remove_cvref`	`201711L`	(C++20)	`std::remove_cvref`

Example

#include <type_traits>

int main()
{
    static_assert(std::is_same_v<std::remove_cvref_t<int>, int>);
    static_assert(std::is_same_v<std::remove_cvref_t<int&>, int>);
    static_assert(std::is_same_v<std::remove_cvref_t<int&&>, int>);
    static_assert(std::is_same_v<std::remove_cvref_t<const int&>, int>);
    static_assert(std::is_same_v<std::remove_cvref_t<const int[2]>, int[2]>);
    static_assert(std::is_same_v<std::remove_cvref_t<const int(&)[2]>, int[2]>);
    static_assert(std::is_same_v<std::remove_cvref_t<int(int)>, int(int)>);
}

remove_cvremove_constremove_volatile (C++11)(C++11)(C++11)	removes const and/or volatile qualifiers from the given type (class template)
remove_reference (C++11)	removes a reference from the given type (class template)
decay (C++11)	applies type transformations as when passing a function argument by value (class template)
remove_cvref (C++26)	combines `meta::remove_cv` and `meta::remove_reference` (function)