forked from OSchip/llvm-project
664 lines
18 KiB
C++
664 lines
18 KiB
C++
// -*- 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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#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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#include <new>
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#include <utility>
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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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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Arg1, class _Arg2, class _Result>
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struct _LIBCPP_TEMPLATE_VIS 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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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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#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_TEMPLATE_VIS 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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#if _LIBCPP_STD_VER > 11
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template <>
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struct _LIBCPP_TEMPLATE_VIS 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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// __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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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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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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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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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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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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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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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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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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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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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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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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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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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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// 2 argument case
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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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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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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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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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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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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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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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#ifndef _LIBCPP_CXX03_LANG
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// 3 or more arguments
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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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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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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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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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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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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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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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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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#else // defined(_LIBCPP_CXX03_LANG)
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#include <__functional_base_03>
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#endif // !defined(_LIBCPP_CXX03_LANG)
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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_CXX03_LANG
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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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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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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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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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template <>
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struct __invoke_void_return_wrapper<void>
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{
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#ifndef _LIBCPP_CXX03_LANG
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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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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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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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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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template <class _Tp>
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class _LIBCPP_TEMPLATE_VIS reference_wrapper
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: public __weak_result_type<_Tp>
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{
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public:
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// types
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typedef _Tp type;
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private:
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type* __f_;
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public:
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// construct/copy/destroy
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_LIBCPP_INLINE_VISIBILITY reference_wrapper(type& __f) _NOEXCEPT
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: __f_(_VSTD::addressof(__f)) {}
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#ifndef _LIBCPP_CXX03_LANG
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private: reference_wrapper(type&&); public: // = delete; // do not bind to temps
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#endif
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// access
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_LIBCPP_INLINE_VISIBILITY operator type& () const _NOEXCEPT {return *__f_;}
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_LIBCPP_INLINE_VISIBILITY type& get() const _NOEXCEPT {return *__f_;}
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#ifndef _LIBCPP_CXX03_LANG
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// invoke
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template <class... _ArgTypes>
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_LIBCPP_INLINE_VISIBILITY
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typename __invoke_of<type&, _ArgTypes...>::type
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operator() (_ArgTypes&&... __args) const {
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return __invoke(get(), _VSTD::forward<_ArgTypes>(__args)...);
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}
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#else
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_LIBCPP_INLINE_VISIBILITY
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typename __invoke_return<type>::type
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operator() () const {
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return __invoke(get());
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}
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template <class _A0>
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_LIBCPP_INLINE_VISIBILITY
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typename __invoke_return0<type, _A0>::type
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operator() (_A0& __a0) const {
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return __invoke(get(), __a0);
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}
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template <class _A0>
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_LIBCPP_INLINE_VISIBILITY
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typename __invoke_return0<type, _A0 const>::type
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operator() (_A0 const& __a0) const {
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return __invoke(get(), __a0);
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}
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template <class _A0, class _A1>
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_LIBCPP_INLINE_VISIBILITY
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typename __invoke_return1<type, _A0, _A1>::type
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operator() (_A0& __a0, _A1& __a1) const {
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return __invoke(get(), __a0, __a1);
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}
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|
template <class _A0, class _A1>
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_LIBCPP_INLINE_VISIBILITY
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|
typename __invoke_return1<type, _A0 const, _A1>::type
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|
operator() (_A0 const& __a0, _A1& __a1) const {
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|
return __invoke(get(), __a0, __a1);
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|
}
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|
template <class _A0, class _A1>
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|
_LIBCPP_INLINE_VISIBILITY
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|
typename __invoke_return1<type, _A0, _A1 const>::type
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|
operator() (_A0& __a0, _A1 const& __a1) const {
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|
return __invoke(get(), __a0, __a1);
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|
}
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|
template <class _A0, class _A1>
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|
_LIBCPP_INLINE_VISIBILITY
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|
typename __invoke_return1<type, _A0 const, _A1 const>::type
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|
operator() (_A0 const& __a0, _A1 const& __a1) const {
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|
return __invoke(get(), __a0, __a1);
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|
}
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|
template <class _A0, class _A1, class _A2>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename __invoke_return2<type, _A0, _A1, _A2>::type
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|
operator() (_A0& __a0, _A1& __a1, _A2& __a2) const {
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|
return __invoke(get(), __a0, __a1, __a2);
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|
}
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|
template <class _A0, class _A1, class _A2>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename __invoke_return2<type, _A0 const, _A1, _A2>::type
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|
operator() (_A0 const& __a0, _A1& __a1, _A2& __a2) const {
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|
return __invoke(get(), __a0, __a1, __a2);
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}
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|
template <class _A0, class _A1, class _A2>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename __invoke_return2<type, _A0, _A1 const, _A2>::type
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operator() (_A0& __a0, _A1 const& __a1, _A2& __a2) const {
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return __invoke(get(), __a0, __a1, __a2);
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}
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|
template <class _A0, class _A1, class _A2>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename __invoke_return2<type, _A0, _A1, _A2 const>::type
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|
operator() (_A0& __a0, _A1& __a1, _A2 const& __a2) const {
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return __invoke(get(), __a0, __a1, __a2);
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}
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|
template <class _A0, class _A1, class _A2>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename __invoke_return2<type, _A0 const, _A1 const, _A2>::type
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|
operator() (_A0 const& __a0, _A1 const& __a1, _A2& __a2) const {
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|
return __invoke(get(), __a0, __a1, __a2);
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|
}
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|
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);
|
|
}
|
|
#endif // _LIBCPP_CXX03_LANG
|
|
};
|
|
|
|
|
|
template <class _Tp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
reference_wrapper<_Tp>
|
|
ref(_Tp& __t) _NOEXCEPT
|
|
{
|
|
return reference_wrapper<_Tp>(__t);
|
|
}
|
|
|
|
template <class _Tp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
reference_wrapper<_Tp>
|
|
ref(reference_wrapper<_Tp> __t) _NOEXCEPT
|
|
{
|
|
return ref(__t.get());
|
|
}
|
|
|
|
template <class _Tp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
reference_wrapper<const _Tp>
|
|
cref(const _Tp& __t) _NOEXCEPT
|
|
{
|
|
return reference_wrapper<const _Tp>(__t);
|
|
}
|
|
|
|
template <class _Tp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
reference_wrapper<const _Tp>
|
|
cref(reference_wrapper<_Tp> __t) _NOEXCEPT
|
|
{
|
|
return cref(__t.get());
|
|
}
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
template <class _Tp> void ref(const _Tp&&) = delete;
|
|
template <class _Tp> void cref(const _Tp&&) = delete;
|
|
#endif
|
|
|
|
#if _LIBCPP_STD_VER > 11
|
|
template <class _Tp, class, class = void>
|
|
struct __is_transparent : false_type {};
|
|
|
|
template <class _Tp, class _Up>
|
|
struct __is_transparent<_Tp, _Up,
|
|
typename __void_t<typename _Tp::is_transparent>::type>
|
|
: true_type {};
|
|
#endif
|
|
|
|
// allocator_arg_t
|
|
|
|
struct _LIBCPP_TEMPLATE_VIS allocator_arg_t { };
|
|
|
|
#if defined(_LIBCPP_CXX03_LANG) || defined(_LIBCPP_BUILDING_MEMORY)
|
|
extern const allocator_arg_t allocator_arg;
|
|
#else
|
|
/* _LIBCPP_INLINE_VAR */ 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_TEMPLATE_VIS uses_allocator
|
|
: public __uses_allocator<_Tp, _Alloc>
|
|
{
|
|
};
|
|
|
|
#if _LIBCPP_STD_VER > 14
|
|
template <class _Tp, class _Alloc>
|
|
_LIBCPP_INLINE_VAR constexpr size_t uses_allocator_v = uses_allocator<_Tp, _Alloc>::value;
|
|
#endif
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
|
|
// allocator construction
|
|
|
|
template <class _Tp, class _Alloc, class ..._Args>
|
|
struct __uses_alloc_ctor_imp
|
|
{
|
|
typedef typename __uncvref<_Alloc>::type _RawAlloc;
|
|
static const bool __ua = uses_allocator<_Tp, _RawAlloc>::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)...);
|
|
}
|
|
|
|
// FIXME: This should have a version which takes a non-const alloc.
|
|
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)...);
|
|
}
|
|
|
|
// FIXME: This should have a version which takes a non-const alloc.
|
|
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);
|
|
}
|
|
|
|
// FIXME: Theis should have a version which takes a non-const alloc.
|
|
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_CXX03_LANG
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_FUNCTIONAL_BASE
|