bit_not.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_FUNCTIONAL_BIT_NOT_HPP
#define TETL_FUNCTIONAL_BIT_NOT_HPP
 
#include <etl/_utility/forward.hpp>
 
namespace etl {
 
/// \brief Function object for performing bitwise NOT. Effectively calls `operator~` on type T.
///
/// https://en.cppreference.com/w/cpp/utility/functional/bit_not
///
/// \ingroup functional
template <typename T = void>
struct bit_not {
    [[nodiscard]] constexpr auto operator()(T const& arg) const -> T
    {
        return static_cast<T>(~arg);
    }
};
 
template <>
struct bit_not<void> {
    using is_transparent = void;
 
    template <typename T>
    [[nodiscard]] constexpr auto operator()(T&& arg) const noexcept(noexcept(~etl::forward<T>(arg)))
        -> decltype(~etl::forward<T>(arg))
    {
        return ~etl::forward<T>(arg);
    }
};
 
} // namespace etl
 
#endif // TETL_FUNCTIONAL_BIT_NOT_HPP