| 123456789101112131415161718192021222324252627282930313233343536373839404142 | #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
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