diff options
| -rw-r--r-- | libcxx/include/__functional_base | 92 | ||||
| -rw-r--r-- | libcxx/include/tuple | 62 |
2 files changed, 92 insertions, 62 deletions
diff --git a/libcxx/include/__functional_base b/libcxx/include/__functional_base index 72da75971b9..8927f9d7f37 100644 --- a/libcxx/include/__functional_base +++ b/libcxx/include/__functional_base @@ -15,6 +15,7 @@ #include <type_traits> #include <typeinfo> #include <exception> +#include <new> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) #pragma GCC system_header @@ -515,6 +516,97 @@ public: }; #endif +// allocator_arg_t + +struct _LIBCPP_TYPE_VIS_ONLY allocator_arg_t { }; + +#if defined(_LIBCPP_HAS_NO_CONSTEXPR) || defined(_LIBCPP_BUILDING_MEMORY) +extern const allocator_arg_t allocator_arg; +#else +constexpr allocator_arg_t allocator_arg = allocator_arg_t(); +#endif + +// uses_allocator + +template <class _Tp> +struct __has_allocator_type +{ +private: + struct __two {char __lx; char __lxx;}; + template <class _Up> static __two __test(...); + template <class _Up> static char __test(typename _Up::allocator_type* = 0); +public: + static const bool value = sizeof(__test<_Tp>(0)) == 1; +}; + +template <class _Tp, class _Alloc, bool = __has_allocator_type<_Tp>::value> +struct __uses_allocator + : public integral_constant<bool, + is_convertible<_Alloc, typename _Tp::allocator_type>::value> +{ +}; + +template <class _Tp, class _Alloc> +struct __uses_allocator<_Tp, _Alloc, false> + : public false_type +{ +}; + +template <class _Tp, class _Alloc> +struct _LIBCPP_TYPE_VIS_ONLY uses_allocator + : public __uses_allocator<_Tp, _Alloc> +{ +}; + +#ifndef _LIBCPP_HAS_NO_VARIADICS + +// allocator construction + +template <class _Tp, class _Alloc, class ..._Args> +struct __uses_alloc_ctor_imp +{ + static const bool __ua = uses_allocator<_Tp, _Alloc>::value; + static const bool __ic = + is_constructible<_Tp, allocator_arg_t, _Alloc, _Args...>::value; + static const int value = __ua ? 2 - __ic : 0; +}; + +template <class _Tp, class _Alloc, class ..._Args> +struct __uses_alloc_ctor + : integral_constant<int, __uses_alloc_ctor_imp<_Tp, _Alloc, _Args...>::value> + {}; + +template <class _Tp, class _Allocator, class... _Args> +inline _LIBCPP_INLINE_VISIBILITY +void __user_alloc_construct_impl (integral_constant<int, 0>, _Tp *__storage, const _Allocator &, _Args &&... __args ) +{ + new (__storage) _Tp (_VSTD::forward<_Args>(__args)...); +} + +template <class _Tp, class _Allocator, class... _Args> +inline _LIBCPP_INLINE_VISIBILITY +void __user_alloc_construct_impl (integral_constant<int, 1>, _Tp *__storage, const _Allocator &__a, _Args &&... __args ) +{ + new (__storage) _Tp (allocator_arg, __a, _VSTD::forward<_Args>(__args)...); +} + +template <class _Tp, class _Allocator, class... _Args> +inline _LIBCPP_INLINE_VISIBILITY +void __user_alloc_construct_impl (integral_constant<int, 2>, _Tp *__storage, const _Allocator &__a, _Args &&... __args ) +{ + new (__storage) _Tp (_VSTD::forward<_Args>(__args)..., __a); +} + +template <class _Tp, class _Allocator, class... _Args> +inline _LIBCPP_INLINE_VISIBILITY +void __user_alloc_construct (_Tp *__storage, const _Allocator &__a, _Args &&... __args) +{ + __user_alloc_construct_impl( + __uses_alloc_ctor<_Tp, _Allocator>(), + __storage, __a, _VSTD::forward<_Args>(__args)... + ); +} +#endif // _LIBCPP_HAS_NO_VARIADICS _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/tuple b/libcxx/include/tuple index 1829932e14a..68b975bf3e2 100644 --- a/libcxx/include/tuple +++ b/libcxx/include/tuple @@ -133,68 +133,6 @@ template <class... Types> _LIBCPP_BEGIN_NAMESPACE_STD -// allocator_arg_t - -struct _LIBCPP_TYPE_VIS_ONLY allocator_arg_t { }; - -#if defined(_LIBCPP_HAS_NO_CONSTEXPR) || defined(_LIBCPP_BUILDING_MEMORY) -extern const allocator_arg_t allocator_arg; -#else -constexpr allocator_arg_t allocator_arg = allocator_arg_t(); -#endif - -// uses_allocator - -template <class _Tp> -struct __has_allocator_type -{ -private: - struct __two {char __lx; char __lxx;}; - template <class _Up> static __two __test(...); - template <class _Up> static char __test(typename _Up::allocator_type* = 0); -public: - static const bool value = sizeof(__test<_Tp>(0)) == 1; -}; - -template <class _Tp, class _Alloc, bool = __has_allocator_type<_Tp>::value> -struct __uses_allocator - : public integral_constant<bool, - is_convertible<_Alloc, typename _Tp::allocator_type>::value> -{ -}; - -template <class _Tp, class _Alloc> -struct __uses_allocator<_Tp, _Alloc, false> - : public false_type -{ -}; - -template <class _Tp, class _Alloc> -struct _LIBCPP_TYPE_VIS_ONLY uses_allocator - : public __uses_allocator<_Tp, _Alloc> -{ -}; - -#ifndef _LIBCPP_HAS_NO_VARIADICS - -// uses-allocator construction - -template <class _Tp, class _Alloc, class ..._Args> -struct __uses_alloc_ctor_imp -{ - static const bool __ua = uses_allocator<_Tp, _Alloc>::value; - static const bool __ic = - is_constructible<_Tp, allocator_arg_t, _Alloc, _Args...>::value; - static const int value = __ua ? 2 - __ic : 0; -}; - -template <class _Tp, class _Alloc, class ..._Args> -struct __uses_alloc_ctor - : integral_constant<int, __uses_alloc_ctor_imp<_Tp, _Alloc, _Args...>::value> - {}; - -#endif // _LIBCPP_HAS_NO_VARIADICS - #ifndef _LIBCPP_HAS_NO_VARIADICS // tuple_size |
