# std::remove_cvref

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< cpp‎ | types

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.

The behavior of a program that adds specializations for `std::remove_cvref` is undefined.

### Member types

Name | Definition
`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 = typename remove_cvref<T>::type; |  | (since C++20)

### Possible implementation

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

### Notes

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

### Example

Run this code

    #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)>);
    }

### See also

remove_cv remove_const remove_volatile (C++11)(C++11)(C++11) | removes const and/or volatile specifiers 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)

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