Eric Fiselier | 7175a07 | 2015-07-31 02:24:58 +0000 | [diff] [blame] | 1 | #ifndef ANY_HELPERS_H |
| 2 | #define ANY_HELPERS_H |
| 3 | |
| 4 | #include <experimental/any> |
| 5 | #include <typeinfo> |
| 6 | #include <type_traits> |
| 7 | #include <cassert> |
| 8 | |
| 9 | #include "test_macros.h" |
| 10 | |
| 11 | #if !defined(TEST_HAS_NO_RTTI) |
| 12 | #define RTTI_ASSERT(X) assert(X) |
| 13 | #else |
| 14 | #define RTTI_ASSERT(X) |
| 15 | #endif |
| 16 | |
| 17 | template <class _Tp> |
| 18 | struct IsSmallObject |
| 19 | : public std::integral_constant<bool |
| 20 | , sizeof(_Tp) <= (sizeof(void*)*3) |
| 21 | && std::alignment_of<void*>::value |
| 22 | % std::alignment_of<_Tp>::value == 0 |
| 23 | && std::is_nothrow_move_constructible<_Tp>::value |
| 24 | > |
| 25 | {}; |
| 26 | |
| 27 | |
| 28 | // Return 'true' if 'Type' will be considered a small type by 'any' |
| 29 | template <class Type> |
| 30 | bool isSmallType() { |
| 31 | #if defined(_LIBCPP_VERSION) |
| 32 | return std::experimental::__any_imp::_IsSmallObject<Type>::value; |
| 33 | #else |
| 34 | return IsSmallObject<Type>::value; |
| 35 | #endif |
| 36 | |
| 37 | } |
| 38 | |
| 39 | // Assert that an object is empty. If the object used to contain an object |
| 40 | // of type 'LastType' check that it can no longer be accessed. |
| 41 | template <class LastType = int> |
| 42 | void assertEmpty(std::experimental::any const& a) { |
| 43 | assert(a.empty()); |
| 44 | RTTI_ASSERT(a.type() == typeid(void)); |
| 45 | assert(std::experimental::any_cast<LastType const>(&a) == nullptr); |
| 46 | } |
| 47 | |
| 48 | // Assert that an 'any' object stores the specified 'Type' and 'value'. |
| 49 | template <class Type> |
| 50 | void assertContains(std::experimental::any const& a, int value = 1) { |
| 51 | assert(!a.empty()); |
| 52 | RTTI_ASSERT(a.type() == typeid(Type)); |
| 53 | assert(std::experimental::any_cast<Type const &>(a).value == value); |
| 54 | } |
| 55 | |
| 56 | // Modify the value of a "test type" stored within an any to the specified |
| 57 | // 'value'. |
| 58 | template <class Type> |
| 59 | void modifyValue(std::experimental::any& a, int value) { |
| 60 | assert(!a.empty()); |
| 61 | RTTI_ASSERT(a.type() == typeid(Type)); |
| 62 | std::experimental::any_cast<Type&>(a).value = value; |
| 63 | } |
| 64 | |
| 65 | // A test type that will trigger the small object optimization within 'any'. |
| 66 | template <int Dummy = 0> |
| 67 | struct small_type |
| 68 | { |
| 69 | static int count; |
| 70 | static int copied; |
| 71 | static int moved; |
| 72 | static int const_copied; |
| 73 | static int non_const_copied; |
| 74 | |
| 75 | static void reset() { |
| 76 | small_type::copied = 0; |
| 77 | small_type::moved = 0; |
| 78 | small_type::const_copied = 0; |
| 79 | small_type::non_const_copied = 0; |
| 80 | } |
| 81 | |
| 82 | int value; |
| 83 | |
| 84 | explicit small_type(int val) : value(val) { |
| 85 | ++count; |
| 86 | } |
| 87 | |
| 88 | small_type(small_type const & other) throw() { |
| 89 | value = other.value; |
| 90 | ++count; |
| 91 | ++copied; |
| 92 | ++const_copied; |
| 93 | } |
| 94 | |
| 95 | small_type(small_type& other) throw() { |
| 96 | value = other.value; |
| 97 | ++count; |
| 98 | ++copied; |
| 99 | ++non_const_copied; |
| 100 | } |
| 101 | |
| 102 | small_type(small_type && other) throw() { |
| 103 | value = other.value; |
| 104 | other.value = 0; |
| 105 | ++count; |
| 106 | ++moved; |
| 107 | } |
| 108 | |
| 109 | ~small_type() { |
| 110 | value = -1; |
| 111 | --count; |
| 112 | } |
| 113 | |
| 114 | private: |
| 115 | small_type& operator=(small_type const&) = delete; |
| 116 | small_type& operator=(small_type&&) = delete; |
| 117 | }; |
| 118 | |
| 119 | template <int Dummy> |
| 120 | int small_type<Dummy>::count = 0; |
| 121 | |
| 122 | template <int Dummy> |
| 123 | int small_type<Dummy>::copied = 0; |
| 124 | |
| 125 | template <int Dummy> |
| 126 | int small_type<Dummy>::moved = 0; |
| 127 | |
| 128 | template <int Dummy> |
| 129 | int small_type<Dummy>::const_copied = 0; |
| 130 | |
| 131 | template <int Dummy> |
| 132 | int small_type<Dummy>::non_const_copied = 0; |
| 133 | |
| 134 | typedef small_type<> small; |
| 135 | typedef small_type<1> small1; |
| 136 | typedef small_type<2> small2; |
| 137 | |
| 138 | |
| 139 | // A test type that will NOT trigger the small object optimization in any. |
| 140 | template <int Dummy = 0> |
| 141 | struct large_type |
| 142 | { |
| 143 | static int count; |
| 144 | static int copied; |
| 145 | static int moved; |
| 146 | static int const_copied; |
| 147 | static int non_const_copied; |
| 148 | |
| 149 | static void reset() { |
| 150 | large_type::copied = 0; |
| 151 | large_type::moved = 0; |
| 152 | large_type::const_copied = 0; |
| 153 | large_type::non_const_copied = 0; |
| 154 | } |
| 155 | |
| 156 | int value; |
| 157 | |
| 158 | large_type(int val) : value(val) { |
| 159 | ++count; |
| 160 | data[0] = 0; |
| 161 | } |
| 162 | |
| 163 | large_type(large_type const & other) { |
| 164 | value = other.value; |
| 165 | ++count; |
| 166 | ++copied; |
| 167 | ++const_copied; |
| 168 | } |
| 169 | |
| 170 | large_type(large_type & other) { |
| 171 | value = other.value; |
| 172 | ++count; |
| 173 | ++copied; |
| 174 | ++non_const_copied; |
| 175 | } |
| 176 | |
| 177 | large_type(large_type && other) { |
| 178 | value = other.value; |
| 179 | other.value = 0; |
| 180 | ++count; |
| 181 | ++moved; |
| 182 | } |
| 183 | |
| 184 | ~large_type() { |
| 185 | value = 0; |
| 186 | --count; |
| 187 | } |
| 188 | |
| 189 | private: |
| 190 | large_type& operator=(large_type const&) = delete; |
| 191 | large_type& operator=(large_type &&) = delete; |
| 192 | int data[10]; |
| 193 | }; |
| 194 | |
| 195 | template <int Dummy> |
| 196 | int large_type<Dummy>::count = 0; |
| 197 | |
| 198 | template <int Dummy> |
| 199 | int large_type<Dummy>::copied = 0; |
| 200 | |
| 201 | template <int Dummy> |
| 202 | int large_type<Dummy>::moved = 0; |
| 203 | |
| 204 | template <int Dummy> |
| 205 | int large_type<Dummy>::const_copied = 0; |
| 206 | |
| 207 | template <int Dummy> |
| 208 | int large_type<Dummy>::non_const_copied = 0; |
| 209 | |
| 210 | typedef large_type<> large; |
| 211 | typedef large_type<1> large1; |
| 212 | typedef large_type<2> large2; |
| 213 | |
| 214 | // The exception type thrown by 'small_throws_on_copy', 'large_throws_on_copy' |
| 215 | // and 'throws_on_move'. |
| 216 | struct my_any_exception {}; |
| 217 | |
| 218 | void throwMyAnyExpression() { |
| 219 | #if !defined(TEST_HAS_NO_EXCEPTIONS) |
| 220 | throw my_any_exception(); |
| 221 | #else |
| 222 | assert(false && "Exceptions are disabled"); |
| 223 | #endif |
| 224 | } |
| 225 | |
| 226 | // A test type that will trigger the small object optimization within 'any'. |
| 227 | // this type throws if it is copied. |
| 228 | struct small_throws_on_copy |
| 229 | { |
| 230 | static int count; |
| 231 | int value; |
| 232 | |
| 233 | explicit small_throws_on_copy(int val = 0) : value(val) { |
| 234 | ++count; |
| 235 | } |
| 236 | |
| 237 | small_throws_on_copy(small_throws_on_copy const &) { |
| 238 | throwMyAnyExpression(); |
| 239 | } |
| 240 | |
| 241 | small_throws_on_copy(small_throws_on_copy && other) throw() { |
| 242 | value = other.value; |
| 243 | ++count; |
| 244 | } |
| 245 | |
| 246 | ~small_throws_on_copy() { |
| 247 | --count; |
| 248 | } |
| 249 | private: |
| 250 | small_throws_on_copy& operator=(small_throws_on_copy const&) = delete; |
| 251 | small_throws_on_copy& operator=(small_throws_on_copy &&) = delete; |
| 252 | }; |
| 253 | |
| 254 | int small_throws_on_copy::count = 0; |
| 255 | |
| 256 | // A test type that will NOT trigger the small object optimization within 'any'. |
| 257 | // this type throws if it is copied. |
| 258 | struct large_throws_on_copy |
| 259 | { |
| 260 | static int count; |
| 261 | int value = 0; |
| 262 | |
| 263 | explicit large_throws_on_copy(int val = 0) : value(val) { |
| 264 | data[0] = 0; |
| 265 | ++count; |
| 266 | } |
| 267 | |
| 268 | large_throws_on_copy(large_throws_on_copy const &) { |
| 269 | throwMyAnyExpression(); |
| 270 | } |
| 271 | |
| 272 | large_throws_on_copy(large_throws_on_copy && other) throw() { |
| 273 | value = other.value; |
| 274 | ++count; |
| 275 | } |
| 276 | |
| 277 | ~large_throws_on_copy() { |
| 278 | --count; |
| 279 | } |
| 280 | |
| 281 | private: |
| 282 | large_throws_on_copy& operator=(large_throws_on_copy const&) = delete; |
| 283 | large_throws_on_copy& operator=(large_throws_on_copy &&) = delete; |
| 284 | int data[10]; |
| 285 | }; |
| 286 | |
| 287 | int large_throws_on_copy::count = 0; |
| 288 | |
| 289 | // A test type that throws when it is moved. This object will NOT trigger |
| 290 | // the small object optimization in 'any'. |
| 291 | struct throws_on_move |
| 292 | { |
| 293 | static int count; |
| 294 | int value; |
| 295 | |
| 296 | explicit throws_on_move(int val = 0) : value(val) { ++count; } |
| 297 | |
| 298 | throws_on_move(throws_on_move const & other) { |
| 299 | value = other.value; |
| 300 | ++count; |
| 301 | } |
| 302 | |
| 303 | throws_on_move(throws_on_move &&) { |
| 304 | throwMyAnyExpression(); |
| 305 | } |
| 306 | |
| 307 | ~throws_on_move() { |
| 308 | --count; |
| 309 | } |
| 310 | private: |
| 311 | throws_on_move& operator=(throws_on_move const&) = delete; |
| 312 | throws_on_move& operator=(throws_on_move &&) = delete; |
| 313 | }; |
| 314 | |
| 315 | int throws_on_move::count = 0; |
| 316 | |
| 317 | |
| 318 | #endif |