diff options
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__functional/reference_wrapper.h')
| -rw-r--r-- | contrib/llvm-project/libcxx/include/__functional/reference_wrapper.h | 97 |
1 files changed, 44 insertions, 53 deletions
diff --git a/contrib/llvm-project/libcxx/include/__functional/reference_wrapper.h b/contrib/llvm-project/libcxx/include/__functional/reference_wrapper.h index 3688590d10d1..54de06a8879c 100644 --- a/contrib/llvm-project/libcxx/include/__functional/reference_wrapper.h +++ b/contrib/llvm-project/libcxx/include/__functional/reference_wrapper.h @@ -26,44 +26,43 @@ _LIBCPP_BEGIN_NAMESPACE_STD template <class _Tp> -class _LIBCPP_TEMPLATE_VIS reference_wrapper : public __weak_result_type<_Tp> -{ +class _LIBCPP_TEMPLATE_VIS reference_wrapper : public __weak_result_type<_Tp> { public: - // types - typedef _Tp type; + // types + typedef _Tp type; + private: - type* __f_; + type* __f_; - static void __fun(_Tp&) _NOEXCEPT; - static void __fun(_Tp&&) = delete; + static void __fun(_Tp&) _NOEXCEPT; + static void __fun(_Tp&&) = delete; public: - template <class _Up, class = __enable_if_t<!__is_same_uncvref<_Up, reference_wrapper>::value, decltype(__fun(std::declval<_Up>())) > > - _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 - reference_wrapper(_Up&& __u) _NOEXCEPT_(noexcept(__fun(std::declval<_Up>()))) { - type& __f = static_cast<_Up&&>(__u); - __f_ = std::addressof(__f); - } - - // access - _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 - operator type&() const _NOEXCEPT {return *__f_;} - _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 - type& get() const _NOEXCEPT {return *__f_;} - - // invoke - template <class... _ArgTypes> - _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 - typename __invoke_of<type&, _ArgTypes...>::type - operator() (_ArgTypes&&... __args) const + template < + class _Up, + class = __enable_if_t<!__is_same_uncvref<_Up, reference_wrapper>::value, decltype(__fun(std::declval<_Up>())) > > + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference_wrapper(_Up&& __u) + _NOEXCEPT_(noexcept(__fun(std::declval<_Up>()))) { + type& __f = static_cast<_Up&&>(__u); + __f_ = std::addressof(__f); + } + + // access + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 operator type&() const _NOEXCEPT { return *__f_; } + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 type& get() const _NOEXCEPT { return *__f_; } + + // invoke + template <class... _ArgTypes> + _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 typename __invoke_of<type&, _ArgTypes...>::type + operator()(_ArgTypes&&... __args) const #if _LIBCPP_STD_VER >= 17 - // Since is_nothrow_invocable requires C++17 LWG3764 is not backported - // to earlier versions. - noexcept(is_nothrow_invocable_v<_Tp&, _ArgTypes...>) + // Since is_nothrow_invocable requires C++17 LWG3764 is not backported + // to earlier versions. + noexcept(is_nothrow_invocable_v<_Tp&, _ArgTypes...>) #endif - { - return std::__invoke(get(), std::forward<_ArgTypes>(__args)...); - } + { + return std::__invoke(get(), std::forward<_ArgTypes>(__args)...); + } }; #if _LIBCPP_STD_VER >= 17 @@ -72,39 +71,31 @@ reference_wrapper(_Tp&) -> reference_wrapper<_Tp>; #endif template <class _Tp> -inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 -reference_wrapper<_Tp> -ref(_Tp& __t) _NOEXCEPT -{ - return reference_wrapper<_Tp>(__t); +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference_wrapper<_Tp> ref(_Tp& __t) _NOEXCEPT { + return reference_wrapper<_Tp>(__t); } template <class _Tp> -inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 -reference_wrapper<_Tp> -ref(reference_wrapper<_Tp> __t) _NOEXCEPT -{ - return __t; +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference_wrapper<_Tp> +ref(reference_wrapper<_Tp> __t) _NOEXCEPT { + return __t; } template <class _Tp> -inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 -reference_wrapper<const _Tp> -cref(const _Tp& __t) _NOEXCEPT -{ - return reference_wrapper<const _Tp>(__t); +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference_wrapper<const _Tp> cref(const _Tp& __t) _NOEXCEPT { + return reference_wrapper<const _Tp>(__t); } template <class _Tp> -inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 -reference_wrapper<const _Tp> -cref(reference_wrapper<_Tp> __t) _NOEXCEPT -{ - return __t; +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference_wrapper<const _Tp> +cref(reference_wrapper<_Tp> __t) _NOEXCEPT { + return __t; } -template <class _Tp> void ref(const _Tp&&) = delete; -template <class _Tp> void cref(const _Tp&&) = delete; +template <class _Tp> +void ref(const _Tp&&) = delete; +template <class _Tp> +void cref(const _Tp&&) = delete; _LIBCPP_END_NAMESPACE_STD |