Eric Fiselier | 13858ee | 2015-03-17 18:28:14 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | // UNSUPPORTED: c++98, c++03, c++11 |
| 11 | |
| 12 | // <experimental/tuple> |
| 13 | |
| 14 | // template <class F, class T> constexpr decltype(auto) apply(F &&, T &&) |
| 15 | |
| 16 | // Test with different ref/ptr/cv qualified argument types. |
| 17 | |
| 18 | #include <experimental/tuple> |
| 19 | #include <array> |
| 20 | #include <utility> |
| 21 | #include <cassert> |
| 22 | |
Eric Fiselier | 13858ee | 2015-03-17 18:28:14 +0000 | [diff] [blame] | 23 | namespace ex = std::experimental; |
| 24 | |
| 25 | int call_with_value(int x, int y) { return (x + y); } |
| 26 | int call_with_ref(int & x, int & y) { return (x + y); } |
| 27 | int call_with_const_ref(int const & x, int const & y) { return (x + y); } |
| 28 | int call_with_rvalue_ref(int && x, int && y) { return (x + y); } |
| 29 | int call_with_pointer(int * x, int * y) { return (*x + *y); } |
| 30 | int call_with_const_pointer(int const* x, int const * y) { return (*x + *y); } |
| 31 | |
| 32 | |
| 33 | template <class Tuple> |
| 34 | void test_values() |
| 35 | { |
| 36 | { |
| 37 | Tuple t{1, 2}; |
| 38 | assert(3 == ex::apply(call_with_value, t)); |
| 39 | } |
| 40 | { |
| 41 | Tuple t{2, 2}; |
| 42 | assert(4 == ex::apply(call_with_ref, t)); |
| 43 | } |
| 44 | { |
| 45 | Tuple t{2, 3}; |
| 46 | assert(5 == ex::apply(call_with_const_ref, t)); |
| 47 | } |
| 48 | { |
| 49 | Tuple t{3, 3}; |
| 50 | assert(6 == ex::apply(call_with_rvalue_ref, static_cast<Tuple &&>(t))); |
| 51 | } |
| 52 | { |
| 53 | Tuple const t{4, 4}; |
| 54 | assert(8 == ex::apply(call_with_value, t)); |
| 55 | } |
| 56 | { |
| 57 | Tuple const t{4, 5}; |
| 58 | assert(9 == ex::apply(call_with_const_ref, t)); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | template <class Tuple> |
| 63 | void test_refs() |
| 64 | { |
| 65 | int x = 0; |
| 66 | int y = 0; |
| 67 | { |
| 68 | x = 1; y = 2; |
| 69 | Tuple t{x, y}; |
| 70 | assert(3 == ex::apply(call_with_value, t)); |
| 71 | } |
| 72 | { |
| 73 | x = 2; y = 2; |
| 74 | Tuple t{x, y}; |
| 75 | assert(4 == ex::apply(call_with_ref, t)); |
| 76 | } |
| 77 | { |
| 78 | x = 2; y = 3; |
| 79 | Tuple t{x, y}; |
| 80 | assert(5 == ex::apply(call_with_const_ref, t)); |
| 81 | } |
| 82 | { |
| 83 | x = 3; y = 3; |
| 84 | Tuple const t{x, y}; |
| 85 | assert(6 == ex::apply(call_with_value, t)); |
| 86 | } |
| 87 | { |
| 88 | x = 3; y = 4; |
| 89 | Tuple const t{x, y}; |
| 90 | assert(7 == ex::apply(call_with_const_ref, t)); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | template <class Tuple> |
| 95 | void test_const_refs() |
| 96 | { |
| 97 | int x = 0; |
| 98 | int y = 0; |
| 99 | { |
| 100 | x = 1; y = 2; |
| 101 | Tuple t{x, y}; |
| 102 | assert(3 == ex::apply(call_with_value, t)); |
| 103 | } |
| 104 | { |
| 105 | x = 2; y = 3; |
| 106 | Tuple t{x, y}; |
| 107 | assert(5 == ex::apply(call_with_const_ref, t)); |
| 108 | } |
| 109 | { |
| 110 | x = 3; y = 3; |
| 111 | Tuple const t{x, y}; |
| 112 | assert(6 == ex::apply(call_with_value, t)); |
| 113 | } |
| 114 | { |
| 115 | x = 3; y = 4; |
| 116 | Tuple const t{x, y}; |
| 117 | assert(7 == ex::apply(call_with_const_ref, t)); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | |
| 122 | template <class Tuple> |
| 123 | void test_pointer() |
| 124 | { |
| 125 | int x = 0; |
| 126 | int y = 0; |
| 127 | { |
| 128 | x = 2; y = 2; |
| 129 | Tuple t{&x, &y}; |
| 130 | assert(4 == ex::apply(call_with_pointer, t)); |
| 131 | } |
| 132 | { |
| 133 | x = 2; y = 3; |
| 134 | Tuple t{&x, &y}; |
| 135 | assert(5 == ex::apply(call_with_const_pointer, t)); |
| 136 | } |
| 137 | { |
| 138 | x = 3; y = 4; |
| 139 | Tuple const t{&x, &y}; |
| 140 | assert(7 == ex::apply(call_with_const_pointer, t)); |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | |
| 145 | template <class Tuple> |
| 146 | void test_const_pointer() |
| 147 | { |
| 148 | int x = 0; |
| 149 | int y = 0; |
| 150 | { |
| 151 | x = 2; y = 3; |
| 152 | Tuple t{&x, &y}; |
| 153 | assert(5 == ex::apply(call_with_const_pointer, t)); |
| 154 | } |
| 155 | { |
| 156 | x = 3; y = 4; |
| 157 | Tuple const t{&x, &y}; |
| 158 | assert(7 == ex::apply(call_with_const_pointer, t)); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | |
| 163 | int main() |
| 164 | { |
| 165 | test_values<std::tuple<int, int>>(); |
| 166 | test_values<std::pair<int, int>>(); |
| 167 | test_values<std::array<int, 2>>(); |
| 168 | |
| 169 | test_refs<std::tuple<int &, int &>>(); |
| 170 | test_refs<std::pair<int &, int &>>(); |
| 171 | |
| 172 | test_const_refs<std::tuple<int const &, int const &>>(); |
| 173 | test_const_refs<std::pair<int const &, int const &>>(); |
| 174 | |
| 175 | test_pointer<std::tuple<int *, int *>>(); |
| 176 | test_pointer<std::pair<int *, int *>>(); |
| 177 | test_pointer<std::array<int *, 2>>(); |
| 178 | |
| 179 | test_const_pointer<std::tuple<int const *, int const *>>(); |
| 180 | test_const_pointer<std::pair<int const *, int const *>>(); |
| 181 | test_const_pointer<std::array<int const *, 2>>(); |
| 182 | } |