#ifndef __GBLIBCPP_BITS_FWD_FUNCTIONAL__
#define __GBLIBCPP_BITS_FWD_FUNCTIONAL__

#include <cstddef>

namespace std {

template <typename T>
class reference_wrapper;

template <typename>
class function;

template <typename Ret, typename... Args>
bool operator==(const std::function<Ret(Args...)>& func, std::nullptr_t) noexcept;

template <typename Ret, typename... Args>
void swap(std::function<Ret(Args...)>& lhs, std::function<Ret(Args...)>& rhs) noexcept;

template <typename T>
constexpr std::reference_wrapper<T> ref(T& t) noexcept;

template <typename T>
constexpr std::reference_wrapper<T>
    ref(std::reference_wrapper<T> t) noexcept;

template <typename T>
void ref(const T&&) = delete;

template <typename T>
constexpr std::reference_wrapper<const T> cref(const T& t) noexcept;

template <typename T>
constexpr std::reference_wrapper<const T>
    cref(std::reference_wrapper<T> t) noexcept;

template <typename T>
void cref(const T&&) = delete;

} // namespace std

#endif