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// -*- C++ -*- |
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//===----------------------------------------------------------------------===// |
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// |
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// The LLVM Compiler Infrastructure |
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// |
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// This file is dual licensed under the MIT and the University of Illinois Open |
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// Source Licenses. See LICENSE.TXT for details. |
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// |
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//===----------------------------------------------------------------------===// |
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|
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#ifndef _LIBCPP_FUNCTIONAL_BASE |
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#define _LIBCPP_FUNCTIONAL_BASE |
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|
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#include <__config> |
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#include <type_traits> |
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#include <typeinfo> |
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#include <exception> |
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#include <new> |
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|
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
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#pragma GCC system_header |
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#endif |
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|
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_LIBCPP_BEGIN_NAMESPACE_STD |
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|
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template <class _Arg, class _Result> |
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struct _LIBCPP_TYPE_VIS_ONLY unary_function |
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{
|
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typedef _Arg argument_type; |
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typedef _Result result_type; |
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}; |
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|
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template <class _Arg1, class _Arg2, class _Result> |
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struct _LIBCPP_TYPE_VIS_ONLY binary_function |
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{
|
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typedef _Arg1 first_argument_type; |
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typedef _Arg2 second_argument_type; |
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typedef _Result result_type; |
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}; |
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|
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template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY hash; |
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|
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template <class _Tp> |
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struct __has_result_type |
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{
|
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private: |
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struct __two {char __lx; char __lxx;};
|
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template <class _Up> static __two __test(...); |
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template <class _Up> static char __test(typename _Up::result_type* = 0); |
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public: |
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static const bool value = sizeof(__test<_Tp>(0)) == 1; |
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}; |
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|
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#if _LIBCPP_STD_VER > 11 |
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template <class _Tp = void> |
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#else |
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template <class _Tp> |
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#endif |
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struct _LIBCPP_TYPE_VIS_ONLY less : binary_function<_Tp, _Tp, bool> |
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{
|
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_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY |
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bool operator()(const _Tp& __x, const _Tp& __y) const |
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{return __x < __y;}
|
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}; |
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|
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#if _LIBCPP_STD_VER > 11 |
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template <> |
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struct _LIBCPP_TYPE_VIS_ONLY less<void> |
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{
|
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template <class _T1, class _T2> |
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_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY |
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auto operator()(_T1&& __t, _T2&& __u) const |
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_NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u))) |
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-> decltype (_VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u)) |
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{ return _VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u); }
|
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typedef void is_transparent; |
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}; |
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#endif |
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|
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// addressof |
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|
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template <class _Tp> |
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inline _LIBCPP_INLINE_VISIBILITY |
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_Tp* |
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addressof(_Tp& __x) _NOEXCEPT |
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{
|
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return (_Tp*)&reinterpret_cast<const volatile char&>(__x); |
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} |
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|
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#if defined(_LIBCPP_HAS_OBJC_ARC) && !defined(_LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF) |
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// Objective-C++ Automatic Reference Counting uses qualified pointers |
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// that require special addressof() signatures. When |
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// _LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF is defined, the compiler |
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// itself is providing these definitions. Otherwise, we provide them. |
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template <class _Tp> |
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inline _LIBCPP_INLINE_VISIBILITY |
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__strong _Tp* |
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addressof(__strong _Tp& __x) _NOEXCEPT |
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{
|
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return &__x; |
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} |
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|
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#ifdef _LIBCPP_HAS_OBJC_ARC_WEAK |
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template <class _Tp> |
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inline _LIBCPP_INLINE_VISIBILITY |
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__weak _Tp* |
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addressof(__weak _Tp& __x) _NOEXCEPT |
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{
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return &__x; |
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} |
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#endif |
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|
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template <class _Tp> |
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inline _LIBCPP_INLINE_VISIBILITY |
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__autoreleasing _Tp* |
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addressof(__autoreleasing _Tp& __x) _NOEXCEPT |
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{
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return &__x; |
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} |
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|
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template <class _Tp> |
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inline _LIBCPP_INLINE_VISIBILITY |
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__unsafe_unretained _Tp* |
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addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT |
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{
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return &__x; |
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} |
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#endif |
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|
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|
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// __weak_result_type |
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|
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template <class _Tp> |
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struct __derives_from_unary_function |
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{
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private: |
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struct __two {char __lx; char __lxx;};
|
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static __two __test(...); |
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template <class _Ap, class _Rp> |
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static unary_function<_Ap, _Rp> |
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__test(const volatile unary_function<_Ap, _Rp>*); |
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public: |
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static const bool value = !is_same<decltype(__test((_Tp*)0)), __two>::value; |
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typedef decltype(__test((_Tp*)0)) type; |
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}; |
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|
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template <class _Tp> |
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struct __derives_from_binary_function |
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{
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private: |
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struct __two {char __lx; char __lxx;};
|
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static __two __test(...); |
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template <class _A1, class _A2, class _Rp> |
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static binary_function<_A1, _A2, _Rp> |
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__test(const volatile binary_function<_A1, _A2, _Rp>*); |
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public: |
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static const bool value = !is_same<decltype(__test((_Tp*)0)), __two>::value; |
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typedef decltype(__test((_Tp*)0)) type; |
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}; |
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|
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template <class _Tp, bool = __derives_from_unary_function<_Tp>::value> |
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struct __maybe_derive_from_unary_function // bool is true |
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: public __derives_from_unary_function<_Tp>::type |
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{
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}; |
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|
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template <class _Tp> |
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struct __maybe_derive_from_unary_function<_Tp, false> |
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{
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}; |
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|
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template <class _Tp, bool = __derives_from_binary_function<_Tp>::value> |
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struct __maybe_derive_from_binary_function // bool is true |
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: public __derives_from_binary_function<_Tp>::type |
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{
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}; |
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|
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template <class _Tp> |
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struct __maybe_derive_from_binary_function<_Tp, false> |
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{
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}; |
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|
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template <class _Tp, bool = __has_result_type<_Tp>::value> |
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struct __weak_result_type_imp // bool is true |
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: public __maybe_derive_from_unary_function<_Tp>, |
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public __maybe_derive_from_binary_function<_Tp> |
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{
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typedef typename _Tp::result_type result_type; |
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}; |
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|
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template <class _Tp> |
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struct __weak_result_type_imp<_Tp, false> |
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: public __maybe_derive_from_unary_function<_Tp>, |
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public __maybe_derive_from_binary_function<_Tp> |
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{
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}; |
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|
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template <class _Tp> |
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struct __weak_result_type |
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: public __weak_result_type_imp<_Tp> |
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{
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}; |
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|
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// 0 argument case |
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|
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template <class _Rp> |
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struct __weak_result_type<_Rp ()> |
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{
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typedef _Rp result_type; |
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}; |
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|
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template <class _Rp> |
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struct __weak_result_type<_Rp (&)()> |
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{
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typedef _Rp result_type; |
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}; |
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|
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template <class _Rp> |
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struct __weak_result_type<_Rp (*)()> |
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{
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typedef _Rp result_type; |
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}; |
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|
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// 1 argument case |
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|
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template <class _Rp, class _A1> |
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struct __weak_result_type<_Rp (_A1)> |
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: public unary_function<_A1, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _A1> |
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struct __weak_result_type<_Rp (&)(_A1)> |
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: public unary_function<_A1, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _A1> |
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struct __weak_result_type<_Rp (*)(_A1)> |
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: public unary_function<_A1, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _Cp> |
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struct __weak_result_type<_Rp (_Cp::*)()> |
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: public unary_function<_Cp*, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _Cp> |
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struct __weak_result_type<_Rp (_Cp::*)() const> |
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: public unary_function<const _Cp*, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _Cp> |
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struct __weak_result_type<_Rp (_Cp::*)() volatile> |
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: public unary_function<volatile _Cp*, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _Cp> |
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struct __weak_result_type<_Rp (_Cp::*)() const volatile> |
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: public unary_function<const volatile _Cp*, _Rp> |
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{
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}; |
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|
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// 2 argument case |
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|
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template <class _Rp, class _A1, class _A2> |
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struct __weak_result_type<_Rp (_A1, _A2)> |
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: public binary_function<_A1, _A2, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _A1, class _A2> |
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struct __weak_result_type<_Rp (*)(_A1, _A2)> |
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: public binary_function<_A1, _A2, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _A1, class _A2> |
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struct __weak_result_type<_Rp (&)(_A1, _A2)> |
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: public binary_function<_A1, _A2, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _Cp, class _A1> |
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struct __weak_result_type<_Rp (_Cp::*)(_A1)> |
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: public binary_function<_Cp*, _A1, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _Cp, class _A1> |
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struct __weak_result_type<_Rp (_Cp::*)(_A1) const> |
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: public binary_function<const _Cp*, _A1, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _Cp, class _A1> |
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struct __weak_result_type<_Rp (_Cp::*)(_A1) volatile> |
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: public binary_function<volatile _Cp*, _A1, _Rp> |
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{
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}; |
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|
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template <class _Rp, class _Cp, class _A1> |
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struct __weak_result_type<_Rp (_Cp::*)(_A1) const volatile> |
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: public binary_function<const volatile _Cp*, _A1, _Rp> |
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{
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}; |
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|
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|
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#ifndef _LIBCPP_HAS_NO_VARIADICS |
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// 3 or more arguments |
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|
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template <class _Rp, class _A1, class _A2, class _A3, class ..._A4> |
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struct __weak_result_type<_Rp (_A1, _A2, _A3, _A4...)> |
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{
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typedef _Rp result_type; |
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}; |
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|
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template <class _Rp, class _A1, class _A2, class _A3, class ..._A4> |
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struct __weak_result_type<_Rp (&)(_A1, _A2, _A3, _A4...)> |
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{
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typedef _Rp result_type; |
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}; |
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|
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template <class _Rp, class _A1, class _A2, class _A3, class ..._A4> |
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struct __weak_result_type<_Rp (*)(_A1, _A2, _A3, _A4...)> |
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{
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typedef _Rp result_type; |
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}; |
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|
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template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3> |
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struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...)> |
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{
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typedef _Rp result_type; |
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}; |
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|
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template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3> |
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struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...) const> |
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{
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typedef _Rp result_type; |
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}; |
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|
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template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3> |
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struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...) volatile> |
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{
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typedef _Rp result_type; |
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}; |
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|
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template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3> |
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struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...) const volatile> |
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{
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typedef _Rp result_type; |
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}; |
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|
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#endif // _LIBCPP_HAS_NO_VARIADICS |
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|
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// __invoke |
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|
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#ifndef _LIBCPP_HAS_NO_VARIADICS |
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|
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// bullets 1 and 2 |
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|
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template <class _Fp, class _A0, class ..._Args, |
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class> |
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inline _LIBCPP_INLINE_VISIBILITY |
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auto |
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__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) |
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-> decltype((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...)) |
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{
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return (_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...); |
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} |
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|
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template <class _Fp, class _A0, class ..._Args, |
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class> |
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inline _LIBCPP_INLINE_VISIBILITY |
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auto |
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__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) |
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-> decltype(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...)) |
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{
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return ((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...); |
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} |
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|
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// bullets 3 and 4 |
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|
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template <class _Fp, class _A0, |
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class> |
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inline _LIBCPP_INLINE_VISIBILITY |
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auto |
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__invoke(_Fp&& __f, _A0&& __a0) |
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-> decltype(_VSTD::forward<_A0>(__a0).*__f) |
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{
|
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return _VSTD::forward<_A0>(__a0).*__f; |
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} |
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|
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template <class _Fp, class _A0, |
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class> |
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inline _LIBCPP_INLINE_VISIBILITY |
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auto |
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__invoke(_Fp&& __f, _A0&& __a0) |
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-> decltype((*_VSTD::forward<_A0>(__a0)).*__f) |
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{
|
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return (*_VSTD::forward<_A0>(__a0)).*__f; |
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} |
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|
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// bullet 5 |
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|
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template <class _Fp, class ..._Args> |
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inline _LIBCPP_INLINE_VISIBILITY |
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auto |
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__invoke(_Fp&& __f, _Args&& ...__args) |
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-> decltype(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...)) |
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{
|
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return _VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...); |
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} |
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template <class _Tp, class ..._Args> |
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struct __invoke_return |
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{
|
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typedef decltype(__invoke(_VSTD::declval<_Tp>(), _VSTD::declval<_Args>()...)) type; |
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}; |
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|
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#else // _LIBCPP_HAS_NO_VARIADICS |
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|
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#include <__functional_base_03> |
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|
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#endif // _LIBCPP_HAS_NO_VARIADICS |
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|
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|
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template <class _Ret> |
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struct __invoke_void_return_wrapper |
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{
|
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#ifndef _LIBCPP_HAS_NO_VARIADICS |
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template <class ..._Args> |
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static _Ret __call(_Args&&... __args) {
|
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return __invoke(_VSTD::forward<_Args>(__args)...); |
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} |
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#else |
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template <class _Fn> |
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static _Ret __call(_Fn __f) {
|
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return __invoke(__f); |
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} |
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|
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template <class _Fn, class _A0> |
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static _Ret __call(_Fn __f, _A0& __a0) {
|
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return __invoke(__f, __a0); |
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} |
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|
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template <class _Fn, class _A0, class _A1> |
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static _Ret __call(_Fn __f, _A0& __a0, _A1& __a1) {
|
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return __invoke(__f, __a0, __a1); |
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} |
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|
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template <class _Fn, class _A0, class _A1, class _A2> |
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static _Ret __call(_Fn __f, _A0& __a0, _A1& __a1, _A2& __a2){
|
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return __invoke(__f, __a0, __a1, __a2); |
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} |
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#endif |
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}; |
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|
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template <> |
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struct __invoke_void_return_wrapper<void> |
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{
|
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#ifndef _LIBCPP_HAS_NO_VARIADICS |
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template <class ..._Args> |
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static void __call(_Args&&... __args) {
|
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__invoke(_VSTD::forward<_Args>(__args)...); |
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} |
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#else |
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template <class _Fn> |
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static void __call(_Fn __f) {
|
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__invoke(__f); |
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} |
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|
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template <class _Fn, class _A0> |
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static void __call(_Fn __f, _A0& __a0) {
|
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__invoke(__f, __a0); |
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} |
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|
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template <class _Fn, class _A0, class _A1> |
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static void __call(_Fn __f, _A0& __a0, _A1& __a1) {
|
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__invoke(__f, __a0, __a1); |
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} |
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|
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template <class _Fn, class _A0, class _A1, class _A2> |
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static void __call(_Fn __f, _A0& __a0, _A1& __a1, _A2& __a2) {
|
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__invoke(__f, __a0, __a1, __a2); |
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} |
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#endif |
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}; |
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|
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template <class _Tp> |
| 494 |
class _LIBCPP_TYPE_VIS_ONLY reference_wrapper |
| 495 |
: public __weak_result_type<_Tp> |
| 496 |
{
|
| 497 |
public: |
| 498 |
// types |
| 499 |
typedef _Tp type; |
| 500 |
private: |
| 501 |
type* __f_; |
| 502 |
|
| 503 |
public: |
| 504 |
// construct/copy/destroy |
| 505 |
_LIBCPP_INLINE_VISIBILITY reference_wrapper(type& __f) _NOEXCEPT |
| 506 |
: __f_(_VSTD::addressof(__f)) {}
|
| 507 |
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| 508 |
private: reference_wrapper(type&&); public: // = delete; // do not bind to temps |
| 509 |
#endif |
| 510 |
|
| 511 |
// access |
| 512 |
_LIBCPP_INLINE_VISIBILITY operator type& () const _NOEXCEPT {return *__f_;}
|
| 513 |
_LIBCPP_INLINE_VISIBILITY type& get() const _NOEXCEPT {return *__f_;}
|
| 514 |
|
| 515 |
#ifndef _LIBCPP_HAS_NO_VARIADICS |
| 516 |
// invoke |
| 517 |
template <class... _ArgTypes> |
| 518 |
_LIBCPP_INLINE_VISIBILITY |
| 519 |
typename __invoke_of<type&, _ArgTypes...>::type |
| 520 |
operator() (_ArgTypes&&... __args) const |
| 521 |
{
|
| 522 |
return __invoke(get(), _VSTD::forward<_ArgTypes>(__args)...); |
| 523 |
} |
| 524 |
#else |
| 525 |
|
| 526 |
_LIBCPP_INLINE_VISIBILITY |
| 527 |
typename __invoke_return<type>::type |
| 528 |
operator() () const |
| 529 |
{
|
| 530 |
return __invoke(get()); |
| 531 |
} |
| 532 |
|
| 533 |
template <class _A0> |
| 534 |
_LIBCPP_INLINE_VISIBILITY |
| 535 |
typename __invoke_return0<type&, _A0>::type |
| 536 |
operator() (_A0& __a0) const |
| 537 |
{
|
| 538 |
return __invoke<type&, _A0>(get(), __a0); |
| 539 |
} |
| 540 |
|
| 541 |
template <class _A0, class _A1> |
| 542 |
_LIBCPP_INLINE_VISIBILITY |
| 543 |
typename __invoke_return1<type&, _A0, _A1>::type |
| 544 |
operator() (_A0& __a0, _A1& __a1) const |
| 545 |
{
|
| 546 |
return __invoke<type&, _A0, _A1>(get(), __a0, __a1); |
| 547 |
} |
| 548 |
|
| 549 |
template <class _A0, class _A1, class _A2> |
| 550 |
_LIBCPP_INLINE_VISIBILITY |
| 551 |
typename __invoke_return2<type&, _A0, _A1, _A2>::type |
| 552 |
operator() (_A0& __a0, _A1& __a1, _A2& __a2) const |
| 553 |
{
|
| 554 |
return __invoke<type&, _A0, _A1, _A2>(get(), __a0, __a1, __a2); |
| 555 |
} |
| 556 |
#endif // _LIBCPP_HAS_NO_VARIADICS |
| 557 |
}; |
| 558 |
|
| 559 |
template <class _Tp> struct __is_reference_wrapper_impl : public false_type {};
|
| 560 |
template <class _Tp> struct __is_reference_wrapper_impl<reference_wrapper<_Tp> > : public true_type {};
|
| 561 |
template <class _Tp> struct __is_reference_wrapper |
| 562 |
: public __is_reference_wrapper_impl<typename remove_cv<_Tp>::type> {};
|
| 563 |
|
| 564 |
template <class _Tp> |
| 565 |
inline _LIBCPP_INLINE_VISIBILITY |
| 566 |
reference_wrapper<_Tp> |
| 567 |
ref(_Tp& __t) _NOEXCEPT |
| 568 |
{
|
| 569 |
return reference_wrapper<_Tp>(__t); |
| 570 |
} |
| 571 |
|
| 572 |
template <class _Tp> |
| 573 |
inline _LIBCPP_INLINE_VISIBILITY |
| 574 |
reference_wrapper<_Tp> |
| 575 |
ref(reference_wrapper<_Tp> __t) _NOEXCEPT |
| 576 |
{
|
| 577 |
return ref(__t.get()); |
| 578 |
} |
| 579 |
|
| 580 |
template <class _Tp> |
| 581 |
inline _LIBCPP_INLINE_VISIBILITY |
| 582 |
reference_wrapper<const _Tp> |
| 583 |
cref(const _Tp& __t) _NOEXCEPT |
| 584 |
{
|
| 585 |
return reference_wrapper<const _Tp>(__t); |
| 586 |
} |
| 587 |
|
| 588 |
template <class _Tp> |
| 589 |
inline _LIBCPP_INLINE_VISIBILITY |
| 590 |
reference_wrapper<const _Tp> |
| 591 |
cref(reference_wrapper<_Tp> __t) _NOEXCEPT |
| 592 |
{
|
| 593 |
return cref(__t.get()); |
| 594 |
} |
| 595 |
|
| 596 |
#ifndef _LIBCPP_HAS_NO_VARIADICS |
| 597 |
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| 598 |
#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS |
| 599 |
|
| 600 |
template <class _Tp> void ref(const _Tp&&) = delete; |
| 601 |
template <class _Tp> void cref(const _Tp&&) = delete; |
| 602 |
|
| 603 |
#else // _LIBCPP_HAS_NO_DELETED_FUNCTIONS |
| 604 |
|
| 605 |
template <class _Tp> void ref(const _Tp&&);// = delete; |
| 606 |
template <class _Tp> void cref(const _Tp&&);// = delete; |
| 607 |
|
| 608 |
#endif // _LIBCPP_HAS_NO_DELETED_FUNCTIONS |
| 609 |
|
| 610 |
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| 611 |
|
| 612 |
#endif // _LIBCPP_HAS_NO_VARIADICS |
| 613 |
|
| 614 |
#if _LIBCPP_STD_VER > 11 |
| 615 |
template <class _Tp1, class _Tp2 = void> |
| 616 |
struct __is_transparent |
| 617 |
{
|
| 618 |
private: |
| 619 |
struct __two {char __lx; char __lxx;};
|
| 620 |
template <class _Up> static __two __test(...); |
| 621 |
template <class _Up> static char __test(typename _Up::is_transparent* = 0); |
| 622 |
public: |
| 623 |
static const bool value = sizeof(__test<_Tp1>(0)) == 1; |
| 624 |
}; |
| 625 |
#endif |
| 626 |
|
| 627 |
// allocator_arg_t |
| 628 |
|
| 629 |
struct _LIBCPP_TYPE_VIS_ONLY allocator_arg_t { };
|
| 630 |
|
| 631 |
#if defined(_LIBCPP_HAS_NO_CONSTEXPR) || defined(_LIBCPP_BUILDING_MEMORY) |
| 632 |
extern const allocator_arg_t allocator_arg; |
| 633 |
#else |
| 634 |
constexpr allocator_arg_t allocator_arg = allocator_arg_t(); |
| 635 |
#endif |
| 636 |
|
| 637 |
// uses_allocator |
| 638 |
|
| 639 |
template <class _Tp> |
| 640 |
struct __has_allocator_type |
| 641 |
{
|
| 642 |
private: |
| 643 |
struct __two {char __lx; char __lxx;};
|
| 644 |
template <class _Up> static __two __test(...); |
| 645 |
template <class _Up> static char __test(typename _Up::allocator_type* = 0); |
| 646 |
public: |
| 647 |
static const bool value = sizeof(__test<_Tp>(0)) == 1; |
| 648 |
}; |
| 649 |
|
| 650 |
template <class _Tp, class _Alloc, bool = __has_allocator_type<_Tp>::value> |
| 651 |
struct __uses_allocator |
| 652 |
: public integral_constant<bool, |
| 653 |
is_convertible<_Alloc, typename _Tp::allocator_type>::value> |
| 654 |
{
|
| 655 |
}; |
| 656 |
|
| 657 |
template <class _Tp, class _Alloc> |
| 658 |
struct __uses_allocator<_Tp, _Alloc, false> |
| 659 |
: public false_type |
| 660 |
{
|
| 661 |
}; |
| 662 |
|
| 663 |
template <class _Tp, class _Alloc> |
| 664 |
struct _LIBCPP_TYPE_VIS_ONLY uses_allocator |
| 665 |
: public __uses_allocator<_Tp, _Alloc> |
| 666 |
{
|
| 667 |
}; |
| 668 |
|
| 669 |
#ifndef _LIBCPP_HAS_NO_VARIADICS |
| 670 |
|
| 671 |
// allocator construction |
| 672 |
|
| 673 |
template <class _Tp, class _Alloc, class ..._Args> |
| 674 |
struct __uses_alloc_ctor_imp |
| 675 |
{
|
| 676 |
static const bool __ua = uses_allocator<_Tp, _Alloc>::value; |
| 677 |
static const bool __ic = |
| 678 |
is_constructible<_Tp, allocator_arg_t, _Alloc, _Args...>::value; |
| 679 |
static const int value = __ua ? 2 - __ic : 0; |
| 680 |
}; |
| 681 |
|
| 682 |
template <class _Tp, class _Alloc, class ..._Args> |
| 683 |
struct __uses_alloc_ctor |
| 684 |
: integral_constant<int, __uses_alloc_ctor_imp<_Tp, _Alloc, _Args...>::value> |
| 685 |
{};
|
| 686 |
|
| 687 |
template <class _Tp, class _Allocator, class... _Args> |
| 688 |
inline _LIBCPP_INLINE_VISIBILITY |
| 689 |
void __user_alloc_construct_impl (integral_constant<int, 0>, _Tp *__storage, const _Allocator &, _Args &&... __args ) |
| 690 |
{
|
| 691 |
new (__storage) _Tp (_VSTD::forward<_Args>(__args)...); |
| 692 |
} |
| 693 |
|
| 694 |
template <class _Tp, class _Allocator, class... _Args> |
| 695 |
inline _LIBCPP_INLINE_VISIBILITY |
| 696 |
void __user_alloc_construct_impl (integral_constant<int, 1>, _Tp *__storage, const _Allocator &__a, _Args &&... __args ) |
| 697 |
{
|
| 698 |
new (__storage) _Tp (allocator_arg, __a, _VSTD::forward<_Args>(__args)...); |
| 699 |
} |
| 700 |
|
| 701 |
template <class _Tp, class _Allocator, class... _Args> |
| 702 |
inline _LIBCPP_INLINE_VISIBILITY |
| 703 |
void __user_alloc_construct_impl (integral_constant<int, 2>, _Tp *__storage, const _Allocator &__a, _Args &&... __args ) |
| 704 |
{
|
| 705 |
new (__storage) _Tp (_VSTD::forward<_Args>(__args)..., __a); |
| 706 |
} |
| 707 |
|
| 708 |
template <class _Tp, class _Allocator, class... _Args> |
| 709 |
inline _LIBCPP_INLINE_VISIBILITY |
| 710 |
void __user_alloc_construct (_Tp *__storage, const _Allocator &__a, _Args &&... __args) |
| 711 |
{
|
| 712 |
__user_alloc_construct_impl( |
| 713 |
__uses_alloc_ctor<_Tp, _Allocator>(), |
| 714 |
__storage, __a, _VSTD::forward<_Args>(__args)... |
| 715 |
); |
| 716 |
} |
| 717 |
#endif // _LIBCPP_HAS_NO_VARIADICS |
| 718 |
|
| 719 |
_LIBCPP_END_NAMESPACE_STD |
| 720 |
|
| 721 |
#endif // _LIBCPP_FUNCTIONAL_BASE |