diff options
| -rw-r--r-- | libcxx/include/memory | 157 |
1 files changed, 58 insertions, 99 deletions
diff --git a/libcxx/include/memory b/libcxx/include/memory index 4765bff299d..22706d029d5 100644 --- a/libcxx/include/memory +++ b/libcxx/include/memory @@ -720,16 +720,12 @@ public: // pointer_traits +template <class _Tp, class = void> +struct __has_element_type : false_type {}; + template <class _Tp> -struct __has_element_type -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::element_type* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_element_type<_Tp, + typename __void_t<typename _Tp::element_type>::type> : true_type {}; template <class _Ptr, bool = __has_element_type<_Ptr>::value> struct __pointer_traits_element_type; @@ -808,16 +804,12 @@ struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, false> #endif // _LIBCPP_HAS_NO_VARIADICS +template <class _Tp, class = void> +struct __has_difference_type : false_type {}; + template <class _Tp> -struct __has_difference_type -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::difference_type* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_difference_type<_Tp, + typename __void_t<typename _Tp::difference_type>::type> : true_type {}; template <class _Ptr, bool = __has_difference_type<_Ptr>::value> struct __pointer_traits_difference_type @@ -998,17 +990,12 @@ struct __rebind_pointer { // allocator_traits -struct __has_pointer_type_imp -{ - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::pointer* = 0); -}; +template <class _Tp, class = void> +struct __has_pointer_type : false_type {}; template <class _Tp> -struct __has_pointer_type - : public integral_constant<bool, sizeof(__has_pointer_type_imp::__test<_Tp>(0)) == 1> -{ -}; +struct __has_pointer_type<_Tp, + typename __void_t<typename _Tp::pointer>::type> : true_type {}; namespace __pointer_type_imp { @@ -1033,16 +1020,12 @@ struct __pointer_type typedef typename __pointer_type_imp::__pointer_type<_Tp, typename remove_reference<_Dp>::type>::type type; }; +template <class _Tp, class = void> +struct __has_const_pointer : false_type {}; + template <class _Tp> -struct __has_const_pointer -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::const_pointer* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_const_pointer<_Tp, + typename __void_t<typename _Tp::const_pointer>::type> : true_type {}; template <class _Tp, class _Ptr, class _Alloc, bool = __has_const_pointer<_Alloc>::value> struct __const_pointer @@ -1060,16 +1043,12 @@ struct __const_pointer<_Tp, _Ptr, _Alloc, false> #endif }; +template <class _Tp, class = void> +struct __has_void_pointer : false_type {}; + template <class _Tp> -struct __has_void_pointer -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::void_pointer* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_void_pointer<_Tp, + typename __void_t<typename _Tp::void_pointer>::type> : true_type {}; template <class _Ptr, class _Alloc, bool = __has_void_pointer<_Alloc>::value> struct __void_pointer @@ -1087,16 +1066,12 @@ struct __void_pointer<_Ptr, _Alloc, false> #endif }; +template <class _Tp, class = void> +struct __has_const_void_pointer : false_type {}; + template <class _Tp> -struct __has_const_void_pointer -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::const_void_pointer* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_const_void_pointer<_Tp, + typename __void_t<typename _Tp::const_void_pointer>::type> : true_type {}; template <class _Ptr, class _Alloc, bool = __has_const_void_pointer<_Alloc>::value> struct __const_void_pointer @@ -1130,16 +1105,12 @@ __to_raw_pointer(_Pointer __p) _NOEXCEPT return _VSTD::__to_raw_pointer(__p.operator->()); } +template <class _Tp, class = void> +struct __has_size_type : false_type {}; + template <class _Tp> -struct __has_size_type -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::size_type* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_size_type<_Tp, + typename __void_t<typename _Tp::size_type>::type> : true_type {}; template <class _Alloc, class _DiffType, bool = __has_size_type<_Alloc>::value> struct __size_type @@ -1153,16 +1124,13 @@ struct __size_type<_Alloc, _DiffType, true> typedef typename _Alloc::size_type type; }; +template <class _Tp, class = void> +struct __has_propagate_on_container_copy_assignment : false_type {}; + template <class _Tp> -struct __has_propagate_on_container_copy_assignment -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::propagate_on_container_copy_assignment* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_propagate_on_container_copy_assignment<_Tp, + typename __void_t<typename _Tp::propagate_on_container_copy_assignment>::type> + : true_type {}; template <class _Alloc, bool = __has_propagate_on_container_copy_assignment<_Alloc>::value> struct __propagate_on_container_copy_assignment @@ -1176,16 +1144,13 @@ struct __propagate_on_container_copy_assignment<_Alloc, true> typedef typename _Alloc::propagate_on_container_copy_assignment type; }; +template <class _Tp, class = void> +struct __has_propagate_on_container_move_assignment : false_type {}; + template <class _Tp> -struct __has_propagate_on_container_move_assignment -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::propagate_on_container_move_assignment* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_propagate_on_container_move_assignment<_Tp, + typename __void_t<typename _Tp::propagate_on_container_move_assignment>::type> + : true_type {}; template <class _Alloc, bool = __has_propagate_on_container_move_assignment<_Alloc>::value> struct __propagate_on_container_move_assignment @@ -1199,16 +1164,13 @@ struct __propagate_on_container_move_assignment<_Alloc, true> typedef typename _Alloc::propagate_on_container_move_assignment type; }; +template <class _Tp, class = void> +struct __has_propagate_on_container_swap : false_type {}; + template <class _Tp> -struct __has_propagate_on_container_swap -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::propagate_on_container_swap* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_propagate_on_container_swap<_Tp, + typename __void_t<typename _Tp::propagate_on_container_swap>::type> + : true_type {}; template <class _Alloc, bool = __has_propagate_on_container_swap<_Alloc>::value> struct __propagate_on_container_swap @@ -1222,16 +1184,13 @@ struct __propagate_on_container_swap<_Alloc, true> typedef typename _Alloc::propagate_on_container_swap type; }; +template <class _Tp, class = void> +struct __has_is_always_equal : false_type {}; + template <class _Tp> -struct __has_is_always_equal -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::is_always_equal* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; +struct __has_is_always_equal<_Tp, + typename __void_t<typename _Tp::is_always_equal>::type> + : true_type {}; template <class _Alloc, bool = __has_is_always_equal<_Alloc>::value> struct __is_always_equal |
