Andrea Falcone | 1c4977f | 2020-07-23 10:58:25 -0400 | [diff] [blame] | 1 | // -*- C++ -*- |
| 2 | //===----------------------------------------------------------------------===// |
| 3 | // |
| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 5 | // See https://llvm.org/LICENSE.txt for license information. |
| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #ifndef _LIBCPP_FUNCTIONAL_BASE_03 |
| 11 | #define _LIBCPP_FUNCTIONAL_BASE_03 |
| 12 | |
| 13 | // manual variadic expansion for <functional> |
| 14 | |
| 15 | // __invoke |
| 16 | |
| 17 | template <class _Ret, class _T1, bool _IsFunc, bool _IsBase> |
| 18 | struct __enable_invoke_imp; |
| 19 | |
| 20 | template <class _Ret, class _T1> |
| 21 | struct __enable_invoke_imp<_Ret, _T1, true, true> { |
| 22 | typedef _Ret _Bullet1; |
| 23 | typedef _Bullet1 type; |
| 24 | }; |
| 25 | |
| 26 | template <class _Ret, class _T1> |
| 27 | struct __enable_invoke_imp<_Ret, _T1, true, false> { |
| 28 | typedef _Ret _Bullet2; |
| 29 | typedef _Bullet2 type; |
| 30 | }; |
| 31 | |
| 32 | template <class _Ret, class _T1> |
| 33 | struct __enable_invoke_imp<_Ret, _T1, false, true> { |
| 34 | typedef typename add_lvalue_reference< |
| 35 | typename __apply_cv<_T1, _Ret>::type |
| 36 | >::type _Bullet3; |
| 37 | typedef _Bullet3 type; |
| 38 | }; |
| 39 | |
| 40 | template <class _Ret, class _T1> |
| 41 | struct __enable_invoke_imp<_Ret, _T1, false, false> { |
| 42 | typedef typename add_lvalue_reference< |
| 43 | typename __apply_cv<decltype(*_VSTD::declval<_T1>()), _Ret>::type |
| 44 | >::type _Bullet4; |
| 45 | typedef _Bullet4 type; |
| 46 | }; |
| 47 | |
| 48 | template <class _Ret, class _T1> |
| 49 | struct __enable_invoke_imp<_Ret, _T1*, false, false> { |
| 50 | typedef typename add_lvalue_reference< |
| 51 | typename __apply_cv<_T1, _Ret>::type |
| 52 | >::type _Bullet4; |
| 53 | typedef _Bullet4 type; |
| 54 | }; |
| 55 | |
| 56 | template <class _Fn, class _T1, |
| 57 | class _Traits = __member_pointer_traits<_Fn>, |
| 58 | class _Ret = typename _Traits::_ReturnType, |
| 59 | class _Class = typename _Traits::_ClassType> |
| 60 | struct __enable_invoke : __enable_invoke_imp< |
| 61 | _Ret, _T1, |
| 62 | is_member_function_pointer<_Fn>::value, |
| 63 | is_base_of<_Class, typename remove_reference<_T1>::type>::value> |
| 64 | { |
| 65 | }; |
| 66 | |
| 67 | __nat __invoke(__any, ...); |
| 68 | |
| 69 | // first bullet |
| 70 | |
| 71 | template <class _Fn, class _T1> |
| 72 | inline _LIBCPP_INLINE_VISIBILITY |
| 73 | typename __enable_invoke<_Fn, _T1>::_Bullet1 |
| 74 | __invoke(_Fn __f, _T1& __t1) { |
| 75 | return (__t1.*__f)(); |
| 76 | } |
| 77 | |
| 78 | template <class _Fn, class _T1, class _A0> |
| 79 | inline _LIBCPP_INLINE_VISIBILITY |
| 80 | typename __enable_invoke<_Fn, _T1>::_Bullet1 |
| 81 | __invoke(_Fn __f, _T1& __t1, _A0& __a0) { |
| 82 | return (__t1.*__f)(__a0); |
| 83 | } |
| 84 | |
| 85 | template <class _Fn, class _T1, class _A0, class _A1> |
| 86 | inline _LIBCPP_INLINE_VISIBILITY |
| 87 | typename __enable_invoke<_Fn, _T1>::_Bullet1 |
| 88 | __invoke(_Fn __f, _T1& __t1, _A0& __a0, _A1& __a1) { |
| 89 | return (__t1.*__f)(__a0, __a1); |
| 90 | } |
| 91 | |
| 92 | template <class _Fn, class _T1, class _A0, class _A1, class _A2> |
| 93 | inline _LIBCPP_INLINE_VISIBILITY |
| 94 | typename __enable_invoke<_Fn, _T1>::_Bullet1 |
| 95 | __invoke(_Fn __f, _T1& __t1, _A0& __a0, _A1& __a1, _A2& __a2) { |
| 96 | return (__t1.*__f)(__a0, __a1, __a2); |
| 97 | } |
| 98 | |
| 99 | template <class _Fn, class _T1> |
| 100 | inline _LIBCPP_INLINE_VISIBILITY |
| 101 | typename __enable_invoke<_Fn, _T1>::_Bullet2 |
| 102 | __invoke(_Fn __f, _T1& __t1) { |
| 103 | return ((*__t1).*__f)(); |
| 104 | } |
| 105 | |
| 106 | template <class _Fn, class _T1, class _A0> |
| 107 | inline _LIBCPP_INLINE_VISIBILITY |
| 108 | typename __enable_invoke<_Fn, _T1>::_Bullet2 |
| 109 | __invoke(_Fn __f, _T1& __t1, _A0& __a0) { |
| 110 | return ((*__t1).*__f)(__a0); |
| 111 | } |
| 112 | |
| 113 | template <class _Fn, class _T1, class _A0, class _A1> |
| 114 | inline _LIBCPP_INLINE_VISIBILITY |
| 115 | typename __enable_invoke<_Fn, _T1>::_Bullet2 |
| 116 | __invoke(_Fn __f, _T1& __t1, _A0& __a0, _A1& __a1) { |
| 117 | return ((*__t1).*__f)(__a0, __a1); |
| 118 | } |
| 119 | |
| 120 | template <class _Fn, class _T1, class _A0, class _A1, class _A2> |
| 121 | inline _LIBCPP_INLINE_VISIBILITY |
| 122 | typename __enable_invoke<_Fn, _T1>::_Bullet2 |
| 123 | __invoke(_Fn __f, _T1& __t1, _A0& __a0, _A1& __a1, _A2& __a2) { |
| 124 | return ((*__t1).*__f)(__a0, __a1, __a2); |
| 125 | } |
| 126 | |
| 127 | template <class _Fn, class _T1> |
| 128 | inline _LIBCPP_INLINE_VISIBILITY |
| 129 | typename __enable_invoke<_Fn, _T1>::_Bullet3 |
| 130 | __invoke(_Fn __f, _T1& __t1) { |
| 131 | return __t1.*__f; |
| 132 | } |
| 133 | |
| 134 | template <class _Fn, class _T1> |
| 135 | inline _LIBCPP_INLINE_VISIBILITY |
| 136 | typename __enable_invoke<_Fn, _T1>::_Bullet4 |
| 137 | __invoke(_Fn __f, _T1& __t1) { |
| 138 | return (*__t1).*__f; |
| 139 | } |
| 140 | |
| 141 | // fifth bullet |
| 142 | |
| 143 | template <class _Fp> |
| 144 | inline _LIBCPP_INLINE_VISIBILITY |
| 145 | decltype(_VSTD::declval<_Fp&>()()) |
| 146 | __invoke(_Fp& __f) |
| 147 | { |
| 148 | return __f(); |
| 149 | } |
| 150 | |
| 151 | template <class _Fp, class _A0> |
| 152 | inline _LIBCPP_INLINE_VISIBILITY |
| 153 | decltype(_VSTD::declval<_Fp&>()(_VSTD::declval<_A0&>())) |
| 154 | __invoke(_Fp& __f, _A0& __a0) |
| 155 | { |
| 156 | return __f(__a0); |
| 157 | } |
| 158 | |
| 159 | template <class _Fp, class _A0, class _A1> |
| 160 | inline _LIBCPP_INLINE_VISIBILITY |
| 161 | decltype(_VSTD::declval<_Fp&>()(_VSTD::declval<_A0&>(), _VSTD::declval<_A1&>())) |
| 162 | __invoke(_Fp& __f, _A0& __a0, _A1& __a1) |
| 163 | { |
| 164 | return __f(__a0, __a1); |
| 165 | } |
| 166 | |
| 167 | template <class _Fp, class _A0, class _A1, class _A2> |
| 168 | inline _LIBCPP_INLINE_VISIBILITY |
| 169 | decltype(_VSTD::declval<_Fp&>()(_VSTD::declval<_A0&>(), _VSTD::declval<_A1&>(), _VSTD::declval<_A2&>())) |
| 170 | __invoke(_Fp& __f, _A0& __a0, _A1& __a1, _A2& __a2) |
| 171 | { |
| 172 | return __f(__a0, __a1, __a2); |
| 173 | } |
| 174 | |
| 175 | template <class _Fp, bool = __has_result_type<__weak_result_type<_Fp> >::value> |
| 176 | struct __invoke_return |
| 177 | { |
| 178 | typedef typename __weak_result_type<_Fp>::result_type type; |
| 179 | }; |
| 180 | |
| 181 | template <class _Fp> |
| 182 | struct __invoke_return<_Fp, false> |
| 183 | { |
| 184 | typedef decltype(__invoke(_VSTD::declval<_Fp&>())) type; |
| 185 | }; |
| 186 | |
| 187 | template <class _Tp, class _A0> |
| 188 | struct __invoke_return0 |
| 189 | { |
| 190 | typedef decltype(__invoke(_VSTD::declval<_Tp&>(), _VSTD::declval<_A0&>())) type; |
| 191 | }; |
| 192 | |
| 193 | template <class _Rp, class _Tp, class _A0> |
| 194 | struct __invoke_return0<_Rp _Tp::*, _A0> |
| 195 | { |
| 196 | typedef typename __enable_invoke<_Rp _Tp::*, _A0>::type type; |
| 197 | }; |
| 198 | |
| 199 | template <class _Tp, class _A0, class _A1> |
| 200 | struct __invoke_return1 |
| 201 | { |
| 202 | typedef decltype(__invoke(_VSTD::declval<_Tp&>(), _VSTD::declval<_A0&>(), |
| 203 | _VSTD::declval<_A1&>())) type; |
| 204 | }; |
| 205 | |
| 206 | template <class _Rp, class _Class, class _A0, class _A1> |
| 207 | struct __invoke_return1<_Rp _Class::*, _A0, _A1> { |
| 208 | typedef typename __enable_invoke<_Rp _Class::*, _A0>::type type; |
| 209 | }; |
| 210 | |
| 211 | template <class _Tp, class _A0, class _A1, class _A2> |
| 212 | struct __invoke_return2 |
| 213 | { |
| 214 | typedef decltype(__invoke(_VSTD::declval<_Tp&>(), _VSTD::declval<_A0&>(), |
| 215 | _VSTD::declval<_A1&>(), |
| 216 | _VSTD::declval<_A2&>())) type; |
| 217 | }; |
| 218 | |
| 219 | template <class _Ret, class _Class, class _A0, class _A1, class _A2> |
| 220 | struct __invoke_return2<_Ret _Class::*, _A0, _A1, _A2> { |
| 221 | typedef typename __enable_invoke<_Ret _Class::*, _A0>::type type; |
| 222 | }; |
| 223 | #endif // _LIBCPP_FUNCTIONAL_BASE_03 |