2010-05-12 03:42:16 +08:00
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// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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2010-05-12 05:36:01 +08:00
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// The LLVM Compiler Infrastructure
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2010-05-12 03:42:16 +08:00
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//
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2010-11-17 06:09:02 +08:00
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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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2010-05-12 03:42:16 +08:00
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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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#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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2013-09-12 10:11:16 +08:00
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#include <new>
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2010-05-12 03:42:16 +08:00
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2011-10-18 04:05:10 +08:00
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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2010-05-12 03:42:16 +08:00
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#pragma GCC system_header
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2011-10-18 04:05:10 +08:00
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#endif
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2010-05-12 03:42:16 +08:00
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_LIBCPP_BEGIN_NAMESPACE_STD
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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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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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2013-08-13 02:38:34 +08:00
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template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY hash;
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2010-05-12 03:42:16 +08:00
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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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2012-10-31 03:06:59 +08:00
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struct __two {char __lx; char __lxx;};
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2010-05-12 03:42:16 +08:00
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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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2013-07-29 22:21:53 +08:00
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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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2013-09-29 03:06:12 +08:00
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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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2012-02-22 05:02:58 +08:00
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{return __x < __y;}
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};
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2013-07-29 22:21:53 +08:00
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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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2013-09-29 03:06:12 +08:00
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template <class _T1, class _T2>
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_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
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2013-07-29 22:21:53 +08:00
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auto operator()(_T1&& __t, _T2&& __u) const
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2015-02-25 20:20:52 +08:00
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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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2013-08-13 09:11:06 +08:00
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typedef void is_transparent;
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};
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#endif
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2010-05-12 03:42:16 +08:00
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// __weak_result_type
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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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2012-10-31 03:06:59 +08:00
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struct __two {char __lx; char __lxx;};
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static __two __test(...);
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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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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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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2012-10-31 03:06:59 +08:00
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struct __two {char __lx; char __lxx;};
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2010-05-12 03:42:16 +08:00
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static __two __test(...);
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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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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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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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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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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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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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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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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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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// 0 argument case
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2011-11-30 02:15:50 +08:00
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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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2011-11-30 02:15:50 +08:00
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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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2011-11-30 02:15:50 +08:00
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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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// 1 argument case
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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// 2 argument case
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2011-11-30 02:15:50 +08:00
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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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2010-05-12 03:42:16 +08:00
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{
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};
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2015-07-23 06:23:49 +08:00
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#ifndef _LIBCPP_HAS_NO_VARIADICS
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2010-05-12 03:42:16 +08:00
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// 3 or more arguments
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2011-11-30 02:15:50 +08:00
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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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2011-11-30 02:15:50 +08:00
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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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2011-11-30 02:15:50 +08:00
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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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2011-11-30 02:15:50 +08:00
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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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2011-11-30 02:15:50 +08:00
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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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2011-11-30 02:15:50 +08:00
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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>
|
2010-05-12 03:42:16 +08:00
|
|
|
{
|
2011-11-30 02:15:50 +08:00
|
|
|
typedef _Rp result_type;
|
2010-05-12 03:42:16 +08:00
|
|
|
};
|
|
|
|
|
2011-11-30 02:15:50 +08:00
|
|
|
template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3>
|
|
|
|
struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...) const volatile>
|
2010-05-12 03:42:16 +08:00
|
|
|
{
|
2011-11-30 02:15:50 +08:00
|
|
|
typedef _Rp result_type;
|
2010-05-12 03:42:16 +08:00
|
|
|
};
|
|
|
|
|
2015-07-23 06:23:49 +08:00
|
|
|
#endif // _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
|
2010-05-12 03:42:16 +08:00
|
|
|
// __invoke
|
|
|
|
|
2015-07-23 06:23:49 +08:00
|
|
|
#ifndef _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
|
2011-05-21 06:02:53 +08:00
|
|
|
// bullets 1 and 2
|
2010-05-12 03:42:16 +08:00
|
|
|
|
2013-05-08 07:40:12 +08:00
|
|
|
template <class _Fp, class _A0, class ..._Args,
|
|
|
|
class>
|
2015-04-19 23:32:52 +08:00
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
2011-05-21 06:02:53 +08:00
|
|
|
auto
|
2011-11-30 02:15:50 +08:00
|
|
|
__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
|
2011-07-01 05:18:19 +08:00
|
|
|
-> decltype((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...))
|
2011-05-21 06:02:53 +08:00
|
|
|
{
|
2011-07-01 05:18:19 +08:00
|
|
|
return (_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...);
|
2010-05-12 03:42:16 +08:00
|
|
|
}
|
|
|
|
|
2013-05-08 07:40:12 +08:00
|
|
|
template <class _Fp, class _A0, class ..._Args,
|
|
|
|
class>
|
2015-04-19 23:32:52 +08:00
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
2011-05-21 06:02:53 +08:00
|
|
|
auto
|
2011-11-30 02:15:50 +08:00
|
|
|
__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
|
2011-07-01 05:18:19 +08:00
|
|
|
-> decltype(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...))
|
2011-05-21 06:02:53 +08:00
|
|
|
{
|
2011-07-01 05:18:19 +08:00
|
|
|
return ((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...);
|
2010-05-12 03:42:16 +08:00
|
|
|
}
|
|
|
|
|
2011-05-21 06:02:53 +08:00
|
|
|
// bullets 3 and 4
|
2010-05-12 03:42:16 +08:00
|
|
|
|
2013-05-08 07:40:12 +08:00
|
|
|
template <class _Fp, class _A0,
|
|
|
|
class>
|
2015-04-19 23:32:52 +08:00
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
2011-05-21 06:02:53 +08:00
|
|
|
auto
|
2011-11-30 02:15:50 +08:00
|
|
|
__invoke(_Fp&& __f, _A0&& __a0)
|
2011-07-01 05:18:19 +08:00
|
|
|
-> decltype(_VSTD::forward<_A0>(__a0).*__f)
|
2010-05-12 03:42:16 +08:00
|
|
|
{
|
2011-07-01 05:18:19 +08:00
|
|
|
return _VSTD::forward<_A0>(__a0).*__f;
|
2010-05-12 03:42:16 +08:00
|
|
|
}
|
|
|
|
|
2013-05-08 07:40:12 +08:00
|
|
|
template <class _Fp, class _A0,
|
|
|
|
class>
|
2015-04-19 23:32:52 +08:00
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
2011-05-21 06:02:53 +08:00
|
|
|
auto
|
2011-11-30 02:15:50 +08:00
|
|
|
__invoke(_Fp&& __f, _A0&& __a0)
|
2011-07-01 05:18:19 +08:00
|
|
|
-> decltype((*_VSTD::forward<_A0>(__a0)).*__f)
|
2011-05-17 00:20:21 +08:00
|
|
|
{
|
2011-07-01 05:18:19 +08:00
|
|
|
return (*_VSTD::forward<_A0>(__a0)).*__f;
|
2011-05-17 00:20:21 +08:00
|
|
|
}
|
|
|
|
|
2011-05-21 06:02:53 +08:00
|
|
|
// bullet 5
|
|
|
|
|
2011-11-30 02:15:50 +08:00
|
|
|
template <class _Fp, class ..._Args>
|
2015-04-19 23:32:52 +08:00
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
2011-05-21 06:02:53 +08:00
|
|
|
auto
|
2011-11-30 02:15:50 +08:00
|
|
|
__invoke(_Fp&& __f, _Args&& ...__args)
|
|
|
|
-> decltype(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...))
|
2010-05-12 03:42:16 +08:00
|
|
|
{
|
2011-11-30 02:15:50 +08:00
|
|
|
return _VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...);
|
2010-05-12 03:42:16 +08:00
|
|
|
}
|
|
|
|
template <class _Tp, class ..._Args>
|
|
|
|
struct __invoke_return
|
|
|
|
{
|
2011-07-01 05:18:19 +08:00
|
|
|
typedef decltype(__invoke(_VSTD::declval<_Tp>(), _VSTD::declval<_Args>()...)) type;
|
2010-05-12 03:42:16 +08:00
|
|
|
};
|
|
|
|
|
2015-07-23 06:23:49 +08:00
|
|
|
#else // _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
|
|
|
|
#include <__functional_base_03>
|
|
|
|
|
|
|
|
#endif // _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
|
|
|
|
|
2015-02-11 00:48:45 +08:00
|
|
|
template <class _Ret>
|
|
|
|
struct __invoke_void_return_wrapper
|
|
|
|
{
|
2015-07-23 06:23:49 +08:00
|
|
|
#ifndef _LIBCPP_HAS_NO_VARIADICS
|
2015-02-11 00:48:45 +08:00
|
|
|
template <class ..._Args>
|
2015-07-23 06:23:49 +08:00
|
|
|
static _Ret __call(_Args&&... __args) {
|
2015-02-11 00:48:45 +08:00
|
|
|
return __invoke(_VSTD::forward<_Args>(__args)...);
|
|
|
|
}
|
2015-07-23 06:23:49 +08:00
|
|
|
#else
|
|
|
|
template <class _Fn>
|
|
|
|
static _Ret __call(_Fn __f) {
|
|
|
|
return __invoke(__f);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Fn, class _A0>
|
|
|
|
static _Ret __call(_Fn __f, _A0& __a0) {
|
|
|
|
return __invoke(__f, __a0);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Fn, class _A0, class _A1>
|
|
|
|
static _Ret __call(_Fn __f, _A0& __a0, _A1& __a1) {
|
|
|
|
return __invoke(__f, __a0, __a1);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Fn, class _A0, class _A1, class _A2>
|
|
|
|
static _Ret __call(_Fn __f, _A0& __a0, _A1& __a1, _A2& __a2){
|
|
|
|
return __invoke(__f, __a0, __a1, __a2);
|
|
|
|
}
|
|
|
|
#endif
|
2015-02-11 00:48:45 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
template <>
|
|
|
|
struct __invoke_void_return_wrapper<void>
|
|
|
|
{
|
2015-07-23 06:23:49 +08:00
|
|
|
#ifndef _LIBCPP_HAS_NO_VARIADICS
|
2015-02-11 00:48:45 +08:00
|
|
|
template <class ..._Args>
|
2015-07-23 06:23:49 +08:00
|
|
|
static void __call(_Args&&... __args) {
|
2015-02-11 00:48:45 +08:00
|
|
|
__invoke(_VSTD::forward<_Args>(__args)...);
|
|
|
|
}
|
2015-07-23 06:23:49 +08:00
|
|
|
#else
|
|
|
|
template <class _Fn>
|
|
|
|
static void __call(_Fn __f) {
|
|
|
|
__invoke(__f);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Fn, class _A0>
|
|
|
|
static void __call(_Fn __f, _A0& __a0) {
|
|
|
|
__invoke(__f, __a0);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Fn, class _A0, class _A1>
|
|
|
|
static void __call(_Fn __f, _A0& __a0, _A1& __a1) {
|
|
|
|
__invoke(__f, __a0, __a1);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Fn, class _A0, class _A1, class _A2>
|
|
|
|
static void __call(_Fn __f, _A0& __a0, _A1& __a1, _A2& __a2) {
|
|
|
|
__invoke(__f, __a0, __a1, __a2);
|
|
|
|
}
|
|
|
|
#endif
|
2015-02-11 00:48:45 +08:00
|
|
|
};
|
|
|
|
|
2010-05-12 03:42:16 +08:00
|
|
|
template <class _Tp>
|
2013-08-13 02:38:34 +08:00
|
|
|
class _LIBCPP_TYPE_VIS_ONLY reference_wrapper
|
2010-05-12 03:42:16 +08:00
|
|
|
: public __weak_result_type<_Tp>
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
// types
|
|
|
|
typedef _Tp type;
|
|
|
|
private:
|
|
|
|
type* __f_;
|
|
|
|
|
|
|
|
public:
|
|
|
|
// construct/copy/destroy
|
2013-08-09 02:38:55 +08:00
|
|
|
_LIBCPP_INLINE_VISIBILITY reference_wrapper(type& __f) _NOEXCEPT
|
|
|
|
: __f_(_VSTD::addressof(__f)) {}
|
2010-09-05 07:28:19 +08:00
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
2010-05-12 03:42:16 +08:00
|
|
|
private: reference_wrapper(type&&); public: // = delete; // do not bind to temps
|
|
|
|
#endif
|
|
|
|
|
|
|
|
// access
|
2011-05-29 01:59:48 +08:00
|
|
|
_LIBCPP_INLINE_VISIBILITY operator type& () const _NOEXCEPT {return *__f_;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY type& get() const _NOEXCEPT {return *__f_;}
|
2010-05-12 03:42:16 +08:00
|
|
|
|
2015-07-23 06:23:49 +08:00
|
|
|
#ifndef _LIBCPP_HAS_NO_VARIADICS
|
2010-05-12 03:42:16 +08:00
|
|
|
// invoke
|
|
|
|
template <class... _ArgTypes>
|
[libcxx] Rewrite C++03 __invoke.
Summary:
This patch rewrites the C++03 `__invoke` and related meta-programming. There are a number of major changes.
`__invoke` in C++03 now has a fallback overload for when the invoke expression is ill-formed (similar to C++11). This means that the `__invoke_return` traits will return `__nat` when `__invoke(...)` is ill formed. This would previously cause a compile error.
Bullets 1-4 of `__invoke` have been rewritten. In the old version `__invoke` had 32 overloads for bullets 1 and 2,
one for each possible cv-qualified function signature with arities 0-3. 64 overloads would be needed to support member functions
with varargs. Currently these overloads were fundamentally broken. An example overload looked like:
```
template <class Rp, class Tp, class T1, class A0>
Rp __invoke(Rp (Tp::*pm)(A0) const, T1&, A0&)
```
Because `A0` appeared in two different deducible contexts it would have to deduce to be an exact match or the overload
would be rejected. This is made even worse because `A0` appears without a reference qualifier in the member function signature
and with a reference qualifier as an `__invoke` parameter. This means that only member functions that took all
of their arguments by value could be matched.
One possible fix would be to make the second occurrence of `A0` appear in a non-deducible context. This way
any type convertible to `A0` could be passed as the first parameter. The benefit of this approach is that the
signature of the member function enforces the arity and types taken by the `__invoke` signature it generates. However
nothing in the `INVOKE` specification requires this behavior.
My solution is to use a `__invoke_enable_if<PM_Type, Tp>` metafunction to selectively enable the `__invoke` overloads for bullets 1, 2, 3 and 4. It uses `__member_function_traits` to inspect and extract the return type and class type of the pointer to member. Using `__member_function_traits` to inspect `PM_Type` also allows us to reduce the number of `__invoke` overloads from 32 to 8 and add
varargs support at the same time.
Because `__invoke_enable_if` knows the exact return type of `__invoke` for bullets 1-4 we no longer need to use `decltype(__invoke(...))` to
compute the return type in the `__invoke_return*` traits. This will reduce the problems caused by `#define decltype(X) __typeof__(X)` in C++03.
Tests for this change have already been committed. All tests in `test/std/utilities/function.objects` now pass in C++03, previously there were 20 failures.
Reviewers: K-ballo, howard.hinnant, mclow.lists
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D11553
llvm-svn: 246068
2015-08-27 04:15:02 +08:00
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_of<type&, _ArgTypes...>::type
|
|
|
|
operator() (_ArgTypes&&... __args) const {
|
|
|
|
return __invoke(get(), _VSTD::forward<_ArgTypes>(__args)...);
|
|
|
|
}
|
2015-07-23 06:23:49 +08:00
|
|
|
#else
|
|
|
|
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return<type>::type
|
[libcxx] Rewrite C++03 __invoke.
Summary:
This patch rewrites the C++03 `__invoke` and related meta-programming. There are a number of major changes.
`__invoke` in C++03 now has a fallback overload for when the invoke expression is ill-formed (similar to C++11). This means that the `__invoke_return` traits will return `__nat` when `__invoke(...)` is ill formed. This would previously cause a compile error.
Bullets 1-4 of `__invoke` have been rewritten. In the old version `__invoke` had 32 overloads for bullets 1 and 2,
one for each possible cv-qualified function signature with arities 0-3. 64 overloads would be needed to support member functions
with varargs. Currently these overloads were fundamentally broken. An example overload looked like:
```
template <class Rp, class Tp, class T1, class A0>
Rp __invoke(Rp (Tp::*pm)(A0) const, T1&, A0&)
```
Because `A0` appeared in two different deducible contexts it would have to deduce to be an exact match or the overload
would be rejected. This is made even worse because `A0` appears without a reference qualifier in the member function signature
and with a reference qualifier as an `__invoke` parameter. This means that only member functions that took all
of their arguments by value could be matched.
One possible fix would be to make the second occurrence of `A0` appear in a non-deducible context. This way
any type convertible to `A0` could be passed as the first parameter. The benefit of this approach is that the
signature of the member function enforces the arity and types taken by the `__invoke` signature it generates. However
nothing in the `INVOKE` specification requires this behavior.
My solution is to use a `__invoke_enable_if<PM_Type, Tp>` metafunction to selectively enable the `__invoke` overloads for bullets 1, 2, 3 and 4. It uses `__member_function_traits` to inspect and extract the return type and class type of the pointer to member. Using `__member_function_traits` to inspect `PM_Type` also allows us to reduce the number of `__invoke` overloads from 32 to 8 and add
varargs support at the same time.
Because `__invoke_enable_if` knows the exact return type of `__invoke` for bullets 1-4 we no longer need to use `decltype(__invoke(...))` to
compute the return type in the `__invoke_return*` traits. This will reduce the problems caused by `#define decltype(X) __typeof__(X)` in C++03.
Tests for this change have already been committed. All tests in `test/std/utilities/function.objects` now pass in C++03, previously there were 20 failures.
Reviewers: K-ballo, howard.hinnant, mclow.lists
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D11553
llvm-svn: 246068
2015-08-27 04:15:02 +08:00
|
|
|
operator() () const {
|
|
|
|
return __invoke(get());
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return0<type, _A0>::type
|
|
|
|
operator() (_A0& __a0) const {
|
|
|
|
return __invoke(get(), __a0);
|
|
|
|
}
|
2015-07-23 06:23:49 +08:00
|
|
|
|
|
|
|
template <class _A0>
|
[libcxx] Rewrite C++03 __invoke.
Summary:
This patch rewrites the C++03 `__invoke` and related meta-programming. There are a number of major changes.
`__invoke` in C++03 now has a fallback overload for when the invoke expression is ill-formed (similar to C++11). This means that the `__invoke_return` traits will return `__nat` when `__invoke(...)` is ill formed. This would previously cause a compile error.
Bullets 1-4 of `__invoke` have been rewritten. In the old version `__invoke` had 32 overloads for bullets 1 and 2,
one for each possible cv-qualified function signature with arities 0-3. 64 overloads would be needed to support member functions
with varargs. Currently these overloads were fundamentally broken. An example overload looked like:
```
template <class Rp, class Tp, class T1, class A0>
Rp __invoke(Rp (Tp::*pm)(A0) const, T1&, A0&)
```
Because `A0` appeared in two different deducible contexts it would have to deduce to be an exact match or the overload
would be rejected. This is made even worse because `A0` appears without a reference qualifier in the member function signature
and with a reference qualifier as an `__invoke` parameter. This means that only member functions that took all
of their arguments by value could be matched.
One possible fix would be to make the second occurrence of `A0` appear in a non-deducible context. This way
any type convertible to `A0` could be passed as the first parameter. The benefit of this approach is that the
signature of the member function enforces the arity and types taken by the `__invoke` signature it generates. However
nothing in the `INVOKE` specification requires this behavior.
My solution is to use a `__invoke_enable_if<PM_Type, Tp>` metafunction to selectively enable the `__invoke` overloads for bullets 1, 2, 3 and 4. It uses `__member_function_traits` to inspect and extract the return type and class type of the pointer to member. Using `__member_function_traits` to inspect `PM_Type` also allows us to reduce the number of `__invoke` overloads from 32 to 8 and add
varargs support at the same time.
Because `__invoke_enable_if` knows the exact return type of `__invoke` for bullets 1-4 we no longer need to use `decltype(__invoke(...))` to
compute the return type in the `__invoke_return*` traits. This will reduce the problems caused by `#define decltype(X) __typeof__(X)` in C++03.
Tests for this change have already been committed. All tests in `test/std/utilities/function.objects` now pass in C++03, previously there were 20 failures.
Reviewers: K-ballo, howard.hinnant, mclow.lists
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D11553
llvm-svn: 246068
2015-08-27 04:15:02 +08:00
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return0<type, _A0 const>::type
|
|
|
|
operator() (_A0 const& __a0) const {
|
|
|
|
return __invoke(get(), __a0);
|
|
|
|
}
|
2015-07-23 06:23:49 +08:00
|
|
|
|
|
|
|
template <class _A0, class _A1>
|
[libcxx] Rewrite C++03 __invoke.
Summary:
This patch rewrites the C++03 `__invoke` and related meta-programming. There are a number of major changes.
`__invoke` in C++03 now has a fallback overload for when the invoke expression is ill-formed (similar to C++11). This means that the `__invoke_return` traits will return `__nat` when `__invoke(...)` is ill formed. This would previously cause a compile error.
Bullets 1-4 of `__invoke` have been rewritten. In the old version `__invoke` had 32 overloads for bullets 1 and 2,
one for each possible cv-qualified function signature with arities 0-3. 64 overloads would be needed to support member functions
with varargs. Currently these overloads were fundamentally broken. An example overload looked like:
```
template <class Rp, class Tp, class T1, class A0>
Rp __invoke(Rp (Tp::*pm)(A0) const, T1&, A0&)
```
Because `A0` appeared in two different deducible contexts it would have to deduce to be an exact match or the overload
would be rejected. This is made even worse because `A0` appears without a reference qualifier in the member function signature
and with a reference qualifier as an `__invoke` parameter. This means that only member functions that took all
of their arguments by value could be matched.
One possible fix would be to make the second occurrence of `A0` appear in a non-deducible context. This way
any type convertible to `A0` could be passed as the first parameter. The benefit of this approach is that the
signature of the member function enforces the arity and types taken by the `__invoke` signature it generates. However
nothing in the `INVOKE` specification requires this behavior.
My solution is to use a `__invoke_enable_if<PM_Type, Tp>` metafunction to selectively enable the `__invoke` overloads for bullets 1, 2, 3 and 4. It uses `__member_function_traits` to inspect and extract the return type and class type of the pointer to member. Using `__member_function_traits` to inspect `PM_Type` also allows us to reduce the number of `__invoke` overloads from 32 to 8 and add
varargs support at the same time.
Because `__invoke_enable_if` knows the exact return type of `__invoke` for bullets 1-4 we no longer need to use `decltype(__invoke(...))` to
compute the return type in the `__invoke_return*` traits. This will reduce the problems caused by `#define decltype(X) __typeof__(X)` in C++03.
Tests for this change have already been committed. All tests in `test/std/utilities/function.objects` now pass in C++03, previously there were 20 failures.
Reviewers: K-ballo, howard.hinnant, mclow.lists
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D11553
llvm-svn: 246068
2015-08-27 04:15:02 +08:00
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return1<type, _A0, _A1>::type
|
|
|
|
operator() (_A0& __a0, _A1& __a1) const {
|
|
|
|
return __invoke(get(), __a0, __a1);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return1<type, _A0 const, _A1>::type
|
|
|
|
operator() (_A0 const& __a0, _A1& __a1) const {
|
|
|
|
return __invoke(get(), __a0, __a1);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return1<type, _A0, _A1 const>::type
|
|
|
|
operator() (_A0& __a0, _A1 const& __a1) const {
|
|
|
|
return __invoke(get(), __a0, __a1);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return1<type, _A0 const, _A1 const>::type
|
|
|
|
operator() (_A0 const& __a0, _A1 const& __a1) const {
|
|
|
|
return __invoke(get(), __a0, __a1);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1, class _A2>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return2<type, _A0, _A1, _A2>::type
|
|
|
|
operator() (_A0& __a0, _A1& __a1, _A2& __a2) const {
|
|
|
|
return __invoke(get(), __a0, __a1, __a2);
|
|
|
|
}
|
2015-07-23 06:23:49 +08:00
|
|
|
|
|
|
|
template <class _A0, class _A1, class _A2>
|
[libcxx] Rewrite C++03 __invoke.
Summary:
This patch rewrites the C++03 `__invoke` and related meta-programming. There are a number of major changes.
`__invoke` in C++03 now has a fallback overload for when the invoke expression is ill-formed (similar to C++11). This means that the `__invoke_return` traits will return `__nat` when `__invoke(...)` is ill formed. This would previously cause a compile error.
Bullets 1-4 of `__invoke` have been rewritten. In the old version `__invoke` had 32 overloads for bullets 1 and 2,
one for each possible cv-qualified function signature with arities 0-3. 64 overloads would be needed to support member functions
with varargs. Currently these overloads were fundamentally broken. An example overload looked like:
```
template <class Rp, class Tp, class T1, class A0>
Rp __invoke(Rp (Tp::*pm)(A0) const, T1&, A0&)
```
Because `A0` appeared in two different deducible contexts it would have to deduce to be an exact match or the overload
would be rejected. This is made even worse because `A0` appears without a reference qualifier in the member function signature
and with a reference qualifier as an `__invoke` parameter. This means that only member functions that took all
of their arguments by value could be matched.
One possible fix would be to make the second occurrence of `A0` appear in a non-deducible context. This way
any type convertible to `A0` could be passed as the first parameter. The benefit of this approach is that the
signature of the member function enforces the arity and types taken by the `__invoke` signature it generates. However
nothing in the `INVOKE` specification requires this behavior.
My solution is to use a `__invoke_enable_if<PM_Type, Tp>` metafunction to selectively enable the `__invoke` overloads for bullets 1, 2, 3 and 4. It uses `__member_function_traits` to inspect and extract the return type and class type of the pointer to member. Using `__member_function_traits` to inspect `PM_Type` also allows us to reduce the number of `__invoke` overloads from 32 to 8 and add
varargs support at the same time.
Because `__invoke_enable_if` knows the exact return type of `__invoke` for bullets 1-4 we no longer need to use `decltype(__invoke(...))` to
compute the return type in the `__invoke_return*` traits. This will reduce the problems caused by `#define decltype(X) __typeof__(X)` in C++03.
Tests for this change have already been committed. All tests in `test/std/utilities/function.objects` now pass in C++03, previously there were 20 failures.
Reviewers: K-ballo, howard.hinnant, mclow.lists
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D11553
llvm-svn: 246068
2015-08-27 04:15:02 +08:00
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return2<type, _A0 const, _A1, _A2>::type
|
|
|
|
operator() (_A0 const& __a0, _A1& __a1, _A2& __a2) const {
|
|
|
|
return __invoke(get(), __a0, __a1, __a2);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1, class _A2>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return2<type, _A0, _A1 const, _A2>::type
|
|
|
|
operator() (_A0& __a0, _A1 const& __a1, _A2& __a2) const {
|
|
|
|
return __invoke(get(), __a0, __a1, __a2);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1, class _A2>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return2<type, _A0, _A1, _A2 const>::type
|
|
|
|
operator() (_A0& __a0, _A1& __a1, _A2 const& __a2) const {
|
|
|
|
return __invoke(get(), __a0, __a1, __a2);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1, class _A2>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return2<type, _A0 const, _A1 const, _A2>::type
|
|
|
|
operator() (_A0 const& __a0, _A1 const& __a1, _A2& __a2) const {
|
|
|
|
return __invoke(get(), __a0, __a1, __a2);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1, class _A2>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return2<type, _A0 const, _A1, _A2 const>::type
|
|
|
|
operator() (_A0 const& __a0, _A1& __a1, _A2 const& __a2) const {
|
|
|
|
return __invoke(get(), __a0, __a1, __a2);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1, class _A2>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return2<type, _A0, _A1 const, _A2 const>::type
|
|
|
|
operator() (_A0& __a0, _A1 const& __a1, _A2 const& __a2) const {
|
|
|
|
return __invoke(get(), __a0, __a1, __a2);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _A0, class _A1, class _A2>
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
|
|
typename __invoke_return2<type, _A0 const, _A1 const, _A2 const>::type
|
|
|
|
operator() (_A0 const& __a0, _A1 const& __a1, _A2 const& __a2) const {
|
|
|
|
return __invoke(get(), __a0, __a1, __a2);
|
|
|
|
}
|
2015-07-23 06:23:49 +08:00
|
|
|
#endif // _LIBCPP_HAS_NO_VARIADICS
|
2010-05-12 03:42:16 +08:00
|
|
|
};
|
|
|
|
|
2014-01-06 22:00:09 +08:00
|
|
|
template <class _Tp> struct __is_reference_wrapper_impl : public false_type {};
|
|
|
|
template <class _Tp> struct __is_reference_wrapper_impl<reference_wrapper<_Tp> > : public true_type {};
|
2010-05-12 03:42:16 +08:00
|
|
|
template <class _Tp> struct __is_reference_wrapper
|
2014-01-06 22:00:09 +08:00
|
|
|
: public __is_reference_wrapper_impl<typename remove_cv<_Tp>::type> {};
|
2010-05-12 03:42:16 +08:00
|
|
|
|
|
|
|
template <class _Tp>
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
|
|
reference_wrapper<_Tp>
|
2011-05-29 01:59:48 +08:00
|
|
|
ref(_Tp& __t) _NOEXCEPT
|
2010-05-12 03:42:16 +08:00
|
|
|
{
|
|
|
|
return reference_wrapper<_Tp>(__t);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Tp>
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
|
|
reference_wrapper<_Tp>
|
2011-05-29 01:59:48 +08:00
|
|
|
ref(reference_wrapper<_Tp> __t) _NOEXCEPT
|
2010-05-12 03:42:16 +08:00
|
|
|
{
|
|
|
|
return ref(__t.get());
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Tp>
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
|
|
reference_wrapper<const _Tp>
|
2011-05-29 01:59:48 +08:00
|
|
|
cref(const _Tp& __t) _NOEXCEPT
|
2010-05-12 03:42:16 +08:00
|
|
|
{
|
|
|
|
return reference_wrapper<const _Tp>(__t);
|
|
|
|
}
|
|
|
|
|
|
|
|
template <class _Tp>
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
|
|
reference_wrapper<const _Tp>
|
2011-05-29 01:59:48 +08:00
|
|
|
cref(reference_wrapper<_Tp> __t) _NOEXCEPT
|
2010-05-12 03:42:16 +08:00
|
|
|
{
|
|
|
|
return cref(__t.get());
|
|
|
|
}
|
|
|
|
|
2015-07-23 06:23:49 +08:00
|
|
|
#ifndef _LIBCPP_HAS_NO_VARIADICS
|
2010-09-05 07:28:19 +08:00
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
|
|
|
|
|
2011-12-02 04:21:04 +08:00
|
|
|
template <class _Tp> void ref(const _Tp&&) = delete;
|
|
|
|
template <class _Tp> void cref(const _Tp&&) = delete;
|
2010-09-05 07:28:19 +08:00
|
|
|
|
|
|
|
#else // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
|
|
|
|
|
2011-12-02 04:21:04 +08:00
|
|
|
template <class _Tp> void ref(const _Tp&&);// = delete;
|
|
|
|
template <class _Tp> void cref(const _Tp&&);// = delete;
|
2010-09-05 07:28:19 +08:00
|
|
|
|
|
|
|
#endif // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
|
|
|
|
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
2010-05-12 03:42:16 +08:00
|
|
|
|
|
|
|
#endif // _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
|
2013-08-13 09:11:06 +08:00
|
|
|
#if _LIBCPP_STD_VER > 11
|
|
|
|
template <class _Tp1, class _Tp2 = void>
|
|
|
|
struct __is_transparent
|
|
|
|
{
|
|
|
|
private:
|
|
|
|
struct __two {char __lx; char __lxx;};
|
|
|
|
template <class _Up> static __two __test(...);
|
|
|
|
template <class _Up> static char __test(typename _Up::is_transparent* = 0);
|
|
|
|
public:
|
|
|
|
static const bool value = sizeof(__test<_Tp1>(0)) == 1;
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
|
2013-09-12 10:11:16 +08:00
|
|
|
// 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
|
2013-08-13 09:11:06 +08:00
|
|
|
|
2010-05-12 03:42:16 +08:00
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
|
|
|
|
#endif // _LIBCPP_FUNCTIONAL_BASE
|