438 lines
11 KiB
C++
438 lines
11 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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#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 _Arg, class _Result>
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struct _LIBCPP_VISIBLE 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_VISIBLE 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> struct _LIBCPP_VISIBLE hash;
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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 _; char __;};
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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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template <class _Tp>
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struct _LIBCPP_VISIBLE less : binary_function<_Tp, _Tp, bool>
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{
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_LIBCPP_INLINE_VISIBILITY bool operator()(const _Tp& __x, const _Tp& __y) const
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{return __x < __y;}
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};
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#ifdef _LIBCPP_HAS_NO_VARIADICS
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#include <__functional_base_03>
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#else // _LIBCPP_HAS_NO_VARIADICS
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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 _; char __;};
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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 _; char __;};
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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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// 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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// __invoke
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// bullets 1 and 2
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template <class _Fp, class _A0, class ..._Args>
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inline _LIBCPP_INLINE_VISIBILITY
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auto
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__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
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-> decltype((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...))
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{
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return (_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...);
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}
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template <class _Fp, class _A0, class ..._Args>
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inline _LIBCPP_INLINE_VISIBILITY
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auto
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__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
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-> decltype(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...))
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{
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return ((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...);
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}
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// bullets 3 and 4
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template <class _Fp, class _A0>
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inline _LIBCPP_INLINE_VISIBILITY
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auto
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__invoke(_Fp&& __f, _A0&& __a0)
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-> decltype(_VSTD::forward<_A0>(__a0).*__f)
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{
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return _VSTD::forward<_A0>(__a0).*__f;
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}
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template <class _Fp, class _A0>
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inline _LIBCPP_INLINE_VISIBILITY
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auto
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__invoke(_Fp&& __f, _A0&& __a0)
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-> decltype((*_VSTD::forward<_A0>(__a0)).*__f)
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{
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return (*_VSTD::forward<_A0>(__a0)).*__f;
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}
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// bullet 5
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template <class _Fp, class ..._Args>
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inline _LIBCPP_INLINE_VISIBILITY
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auto
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__invoke(_Fp&& __f, _Args&& ...__args)
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-> decltype(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...))
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{
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return _VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...);
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}
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template <class _Tp, class ..._Args>
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struct __invoke_return
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{
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typedef decltype(__invoke(_VSTD::declval<_Tp>(), _VSTD::declval<_Args>()...)) type;
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};
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template <class _Tp>
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class _LIBCPP_VISIBLE 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 : __f_(&__f) {}
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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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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// 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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{
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return __invoke(get(), _VSTD::forward<_ArgTypes>(__args)...);
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}
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};
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template <class _Tp> struct ____is_reference_wrapper : public false_type {};
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template <class _Tp> struct ____is_reference_wrapper<reference_wrapper<_Tp> > : public true_type {};
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template <class _Tp> struct __is_reference_wrapper
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: public ____is_reference_wrapper<typename remove_cv<_Tp>::type> {};
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template <class _Tp>
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inline _LIBCPP_INLINE_VISIBILITY
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reference_wrapper<_Tp>
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ref(_Tp& __t) _NOEXCEPT
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{
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return reference_wrapper<_Tp>(__t);
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}
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template <class _Tp>
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inline _LIBCPP_INLINE_VISIBILITY
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reference_wrapper<_Tp>
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ref(reference_wrapper<_Tp> __t) _NOEXCEPT
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{
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return ref(__t.get());
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}
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template <class _Tp>
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inline _LIBCPP_INLINE_VISIBILITY
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reference_wrapper<const _Tp>
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cref(const _Tp& __t) _NOEXCEPT
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{
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return reference_wrapper<const _Tp>(__t);
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}
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template <class _Tp>
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inline _LIBCPP_INLINE_VISIBILITY
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reference_wrapper<const _Tp>
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cref(reference_wrapper<_Tp> __t) _NOEXCEPT
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{
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return cref(__t.get());
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}
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
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template <class _Tp> void ref(const _Tp&&) = delete;
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template <class _Tp> void cref(const _Tp&&) = delete;
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#else // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
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template <class _Tp> void ref(const _Tp&&);// = delete;
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template <class _Tp> void cref(const _Tp&&);// = delete;
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#endif // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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#endif // _LIBCPP_HAS_NO_VARIADICS
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_FUNCTIONAL_BASE
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