Wyatt Hepler | 64c165e | 2020-01-13 10:21:08 -0800 | [diff] [blame] | 1 | // Copyright 2020 The Pigweed Authors |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
Wyatt Hepler | 1a96094 | 2019-11-26 14:13:38 -0800 | [diff] [blame] | 4 | // use this file except in compliance with the License. You may obtain a copy of |
| 5 | // the License at |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 6 | // |
| 7 | // https://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 11 | // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
Wyatt Hepler | 1a96094 | 2019-11-26 14:13:38 -0800 | [diff] [blame] | 12 | // License for the specific language governing permissions and limitations under |
| 13 | // the License. |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 14 | |
| 15 | // This is the base::span unit test from Chromium, with small modifications. |
| 16 | // Modifications are noted with "Pigweed:" comments. |
| 17 | // |
| 18 | // Original file: |
Wyatt Hepler | 64c165e | 2020-01-13 10:21:08 -0800 | [diff] [blame] | 19 | // https://chromium.googlesource.com/chromium/src/+/ef71f9c29f0dc6eddae474879c4ca5232ca93a6c/base/containers/span_unittest.cc |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 20 | // |
Wyatt Hepler | 64c165e | 2020-01-13 10:21:08 -0800 | [diff] [blame] | 21 | // In order to minimize changes from the original, this file does NOT fully |
| 22 | // adhere to Pigweed's style guide. |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 23 | |
| 24 | #include <algorithm> |
| 25 | #include <cstdint> |
| 26 | #include <memory> |
Wyatt Hepler | 69a5190 | 2020-06-22 10:42:53 -0700 | [diff] [blame] | 27 | #include <span> |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 28 | #include <string> |
| 29 | #include <type_traits> |
| 30 | #include <vector> |
| 31 | |
| 32 | #include "gtest/gtest.h" |
| 33 | |
| 34 | // Pigweed: gMock matchers are not yet supported. |
| 35 | #if 0 |
| 36 | using ::testing::ElementsAre; |
| 37 | using ::testing::Eq; |
| 38 | using ::testing::Pointwise; |
| 39 | #endif // 0 |
| 40 | |
Wyatt Hepler | 69a5190 | 2020-06-22 10:42:53 -0700 | [diff] [blame] | 41 | namespace std { |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 42 | |
| 43 | namespace { |
| 44 | |
| 45 | // constexpr implementation of std::equal's 4 argument overload. |
| 46 | template <class InputIterator1, class InputIterator2> |
| 47 | constexpr bool constexpr_equal(InputIterator1 first1, |
| 48 | InputIterator1 last1, |
| 49 | InputIterator2 first2, |
| 50 | InputIterator2 last2) { |
| 51 | for (; first1 != last1 && first2 != last2; ++first1, ++first2) { |
| 52 | if (*first1 != *first2) |
| 53 | return false; |
| 54 | } |
| 55 | |
| 56 | return first1 == last1 && first2 == last2; |
| 57 | } |
| 58 | |
| 59 | } // namespace |
| 60 | |
Wyatt Hepler | 83d4248 | 2019-11-19 15:17:33 -0800 | [diff] [blame] | 61 | TEST(SpanTest, DeductionGuides_MutableArray) { |
| 62 | char array[] = {'a', 'b', 'c', 'd', '\0'}; |
| 63 | |
| 64 | auto the_span = span(array); |
| 65 | static_assert(the_span.extent == 5u); |
| 66 | static_assert(the_span.size() == 5u); |
| 67 | |
| 68 | the_span[0] = '!'; |
| 69 | EXPECT_STREQ(the_span.data(), "!bcd"); |
| 70 | } |
| 71 | |
| 72 | TEST(SpanTest, DeductionGuides_ConstArray) { |
| 73 | static constexpr char array[] = {'a', 'b', 'c', 'd', '\0'}; |
| 74 | |
| 75 | constexpr auto the_span = span(array); |
| 76 | static_assert(the_span.extent == 5u); |
| 77 | static_assert(the_span.size() == 5u); |
| 78 | |
| 79 | EXPECT_STREQ(the_span.data(), "abcd"); |
| 80 | } |
| 81 | |
| 82 | TEST(SpanTest, DeductionGuides_MutableStdArray) { |
| 83 | std::array<char, 5> array{'a', 'b', 'c', 'd'}; |
| 84 | |
| 85 | auto the_span = span(array); |
| 86 | static_assert(the_span.extent == 5u); |
| 87 | static_assert(the_span.size() == 5u); |
| 88 | |
| 89 | the_span[0] = '?'; |
| 90 | EXPECT_STREQ(the_span.data(), "?bcd"); |
| 91 | } |
| 92 | |
| 93 | TEST(SpanTest, DeductionGuides_ConstStdArray) { |
| 94 | static constexpr std::array<char, 5> array{'a', 'b', 'c', 'd'}; |
| 95 | |
| 96 | constexpr auto the_span = span(array); |
| 97 | static_assert(the_span.extent == 5u); |
| 98 | static_assert(the_span.size() == 5u); |
| 99 | |
| 100 | EXPECT_STREQ(the_span.data(), "abcd"); |
| 101 | } |
| 102 | |
Wyatt Hepler | 1cb06df | 2020-01-31 10:01:12 -0800 | [diff] [blame] | 103 | TEST(SpanTest, DeductionGuides_MutableContainerWithConstElements) { |
| 104 | std::string_view string("Hello"); |
| 105 | auto the_span = span(string); |
Wyatt Hepler | 83d4248 | 2019-11-19 15:17:33 -0800 | [diff] [blame] | 106 | static_assert(the_span.extent == dynamic_extent); |
| 107 | |
| 108 | EXPECT_STREQ("Hello", the_span.data()); |
| 109 | EXPECT_EQ(5u, the_span.size()); |
| 110 | } |
| 111 | |
Wyatt Hepler | 1cb06df | 2020-01-31 10:01:12 -0800 | [diff] [blame] | 112 | TEST(SpanTest, DeductionGuides_MutableContainerWithMutableElements) { |
| 113 | std::string string("Hello"); |
| 114 | auto the_span = span(string); |
| 115 | static_assert(the_span.extent == dynamic_extent); |
| 116 | |
| 117 | EXPECT_EQ(5u, the_span.size()); |
| 118 | the_span[1] = 'a'; |
| 119 | EXPECT_STREQ(the_span.data(), string.data()); |
| 120 | EXPECT_STREQ("Hallo", the_span.data()); |
| 121 | } |
| 122 | |
| 123 | class MutableStringView { |
| 124 | public: |
| 125 | using element_type = char; |
| 126 | using value_type = char; |
| 127 | using size_type = size_t; |
| 128 | using difference_type = ptrdiff_t; |
| 129 | using pointer = char*; |
| 130 | using reference = char&; |
| 131 | using iterator = char*; |
| 132 | using const_iterator = const char*; |
| 133 | using reverse_iterator = std::reverse_iterator<iterator>; |
| 134 | using const_reverse_iterator = std::reverse_iterator<const_iterator>; |
| 135 | |
| 136 | MutableStringView(char* str) : data_(str, std::strlen(str)) {} |
| 137 | |
| 138 | char& operator[](size_type index) const { return data_[index]; } |
| 139 | pointer data() const { return data_.data(); } |
| 140 | size_type size() const { return data_.size(); } |
| 141 | iterator begin() const { return data_.begin(); } |
| 142 | iterator end() const { return data_.end(); } |
| 143 | |
| 144 | private: |
| 145 | span<char> data_; |
| 146 | }; |
| 147 | |
| 148 | TEST(SpanTest, DeductionGuides_ConstContainerWithMutableElements) { |
| 149 | char data[] = "54321"; |
| 150 | MutableStringView view(data); |
| 151 | |
| 152 | auto the_span = span(view); |
| 153 | static_assert(the_span.extent == dynamic_extent); |
| 154 | |
| 155 | EXPECT_EQ(5u, the_span.size()); |
| 156 | view[2] = '?'; |
| 157 | EXPECT_STREQ("54?21", the_span.data()); |
| 158 | EXPECT_STREQ("54?21", data); |
| 159 | } |
| 160 | |
| 161 | TEST(SpanTest, DeductionGuides_ConstContainerWithMutableValueType) { |
| 162 | const std::string string("Hello"); |
| 163 | auto the_span = span(string); |
| 164 | static_assert(the_span.extent == dynamic_extent); |
| 165 | |
| 166 | EXPECT_EQ(5u, the_span.size()); |
| 167 | EXPECT_STREQ("Hello", the_span.data()); |
| 168 | } |
| 169 | |
| 170 | TEST(SpanTest, DeductionGuides_ConstContainerWithConstElements) { |
| 171 | const std::string_view string("Hello"); |
| 172 | auto the_span = span(string); |
| 173 | static_assert(the_span.extent == dynamic_extent); |
| 174 | |
| 175 | EXPECT_EQ(5u, the_span.size()); |
| 176 | EXPECT_STREQ("Hello", the_span.data()); |
| 177 | } |
| 178 | |
| 179 | TEST(SpanTest, DeductionGuides_FromTemporary_ContainerWithConstElements) { |
| 180 | auto the_span = span(std::string_view("Hello")); |
| 181 | static_assert(the_span.extent == dynamic_extent); |
| 182 | |
| 183 | EXPECT_EQ(5u, the_span.size()); |
| 184 | EXPECT_STREQ("Hello", the_span.data()); |
| 185 | } |
| 186 | |
| 187 | TEST(SpanTest, DeductionGuides_FromReference) { |
| 188 | std::array<int, 5> array{1, 3, 5, 7, 9}; |
| 189 | std::array<int, 5>& array_ref = array; |
| 190 | |
| 191 | auto the_span = span(array_ref); |
| 192 | static_assert(the_span.extent == 5); |
| 193 | |
| 194 | for (unsigned i = 0; i < array.size(); ++i) { |
| 195 | ASSERT_EQ(array[i], the_span[i]); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | TEST(SpanTest, DeductionGuides_FromConstReference) { |
| 200 | std::string_view string = "yo!"; |
| 201 | const std::string_view& string_ref = string; |
| 202 | |
| 203 | auto the_span = span(string_ref); |
| 204 | static_assert(the_span.extent == dynamic_extent); |
| 205 | |
| 206 | EXPECT_EQ(string, the_span.data()); |
| 207 | } |
| 208 | |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 209 | TEST(SpanTest, DefaultConstructor) { |
| 210 | span<int> dynamic_span; |
| 211 | EXPECT_EQ(nullptr, dynamic_span.data()); |
| 212 | EXPECT_EQ(0u, dynamic_span.size()); |
| 213 | |
| 214 | constexpr span<int, 0> static_span; |
| 215 | static_assert(nullptr == static_span.data(), ""); |
Rob Mohr | cd59b7e | 2019-11-19 09:54:45 -0800 | [diff] [blame] | 216 | static_assert(static_span.empty(), ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | TEST(SpanTest, ConstructFromDataAndSize) { |
| 220 | constexpr span<int> empty_span(nullptr, 0); |
| 221 | EXPECT_TRUE(empty_span.empty()); |
| 222 | EXPECT_EQ(nullptr, empty_span.data()); |
| 223 | |
| 224 | std::vector<int> vector = {1, 1, 2, 3, 5, 8}; |
| 225 | |
| 226 | span<int> dynamic_span(vector.data(), vector.size()); |
| 227 | EXPECT_EQ(vector.data(), dynamic_span.data()); |
| 228 | EXPECT_EQ(vector.size(), dynamic_span.size()); |
| 229 | |
| 230 | for (size_t i = 0; i < dynamic_span.size(); ++i) |
| 231 | EXPECT_EQ(vector[i], dynamic_span[i]); |
| 232 | |
| 233 | span<int, 6> static_span(vector.data(), vector.size()); |
| 234 | EXPECT_EQ(vector.data(), static_span.data()); |
| 235 | EXPECT_EQ(vector.size(), static_span.size()); |
| 236 | |
| 237 | for (size_t i = 0; i < static_span.size(); ++i) |
| 238 | EXPECT_EQ(vector[i], static_span[i]); |
| 239 | } |
| 240 | |
| 241 | TEST(SpanTest, ConstructFromPointerPair) { |
| 242 | constexpr span<int> empty_span(nullptr, nullptr); |
| 243 | EXPECT_TRUE(empty_span.empty()); |
| 244 | EXPECT_EQ(nullptr, empty_span.data()); |
| 245 | |
| 246 | std::vector<int> vector = {1, 1, 2, 3, 5, 8}; |
| 247 | |
| 248 | span<int> dynamic_span(vector.data(), vector.data() + vector.size() / 2); |
| 249 | EXPECT_EQ(vector.data(), dynamic_span.data()); |
| 250 | EXPECT_EQ(vector.size() / 2, dynamic_span.size()); |
| 251 | |
| 252 | for (size_t i = 0; i < dynamic_span.size(); ++i) |
| 253 | EXPECT_EQ(vector[i], dynamic_span[i]); |
| 254 | |
| 255 | span<int, 3> static_span(vector.data(), vector.data() + vector.size() / 2); |
| 256 | EXPECT_EQ(vector.data(), static_span.data()); |
| 257 | EXPECT_EQ(vector.size() / 2, static_span.size()); |
| 258 | |
| 259 | for (size_t i = 0; i < static_span.size(); ++i) |
| 260 | EXPECT_EQ(vector[i], static_span[i]); |
| 261 | } |
| 262 | |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 263 | TEST(SpanTest, AllowedConversionsFromStdArray) { |
| 264 | // In the following assertions we use std::is_convertible_v<From, To>, which |
| 265 | // for non-void types is equivalent to checking whether the following |
| 266 | // expression is well-formed: |
| 267 | // |
| 268 | // T obj = std::declval<From>(); |
| 269 | // |
| 270 | // In particular we are checking whether From is implicitly convertible to To, |
| 271 | // which also implies that To is explicitly constructible from From. |
| 272 | static_assert( |
| 273 | std::is_convertible<std::array<int, 3>&, span<int>>::value, |
| 274 | "Error: l-value reference to std::array<int> should be convertible to " |
| 275 | "span<int> with dynamic extent."); |
| 276 | static_assert( |
| 277 | std::is_convertible<std::array<int, 3>&, span<int, 3>>::value, |
| 278 | "Error: l-value reference to std::array<int> should be convertible to " |
| 279 | "span<int> with the same static extent."); |
| 280 | static_assert( |
| 281 | std::is_convertible<std::array<int, 3>&, span<const int>>::value, |
| 282 | "Error: l-value reference to std::array<int> should be convertible to " |
| 283 | "span<const int> with dynamic extent."); |
| 284 | static_assert( |
| 285 | std::is_convertible<std::array<int, 3>&, span<const int, 3>>::value, |
| 286 | "Error: l-value reference to std::array<int> should be convertible to " |
| 287 | "span<const int> with the same static extent."); |
| 288 | static_assert( |
| 289 | std::is_convertible<const std::array<int, 3>&, span<const int>>::value, |
| 290 | "Error: const l-value reference to std::array<int> should be " |
| 291 | "convertible to span<const int> with dynamic extent."); |
| 292 | static_assert( |
| 293 | std::is_convertible<const std::array<int, 3>&, span<const int, 3>>::value, |
| 294 | "Error: const l-value reference to std::array<int> should be convertible " |
| 295 | "to span<const int> with the same static extent."); |
| 296 | static_assert( |
| 297 | std::is_convertible<std::array<const int, 3>&, span<const int>>::value, |
| 298 | "Error: l-value reference to std::array<const int> should be " |
| 299 | "convertible to span<const int> with dynamic extent."); |
| 300 | static_assert( |
| 301 | std::is_convertible<std::array<const int, 3>&, span<const int, 3>>::value, |
| 302 | "Error: l-value reference to std::array<const int> should be convertible " |
| 303 | "to span<const int> with the same static extent."); |
| 304 | static_assert( |
| 305 | std::is_convertible<const std::array<const int, 3>&, |
| 306 | span<const int>>::value, |
| 307 | "Error: const l-value reference to std::array<const int> should be " |
| 308 | "convertible to span<const int> with dynamic extent."); |
| 309 | static_assert( |
| 310 | std::is_convertible<const std::array<const int, 3>&, |
| 311 | span<const int, 3>>::value, |
| 312 | "Error: const l-value reference to std::array<const int> should be " |
| 313 | "convertible to span<const int> with the same static extent."); |
| 314 | } |
| 315 | |
| 316 | TEST(SpanTest, DisallowedConstructionsFromStdArray) { |
| 317 | // In the following assertions we use !std::is_constructible_v<T, Args>, which |
| 318 | // is equivalent to checking whether the following expression is malformed: |
| 319 | // |
| 320 | // T obj(std::declval<Args>()...); |
| 321 | // |
| 322 | // In particular we are checking that T is not explicitly constructible from |
| 323 | // Args, which also implies that T is not implicitly constructible from Args |
| 324 | // as well. |
| 325 | static_assert( |
| 326 | !std::is_constructible<span<int>, const std::array<int, 3>&>::value, |
| 327 | "Error: span<int> with dynamic extent should not be constructible " |
| 328 | "from const l-value reference to std::array<int>"); |
| 329 | |
| 330 | static_assert( |
| 331 | !std::is_constructible<span<int>, std::array<const int, 3>&>::value, |
| 332 | "Error: span<int> with dynamic extent should not be constructible " |
| 333 | "from l-value reference to std::array<const int>"); |
| 334 | |
| 335 | static_assert( |
| 336 | !std::is_constructible<span<int>, const std::array<const int, 3>&>::value, |
| 337 | "Error: span<int> with dynamic extent should not be constructible " |
| 338 | "const from l-value reference to std::array<const int>"); |
| 339 | |
| 340 | static_assert( |
| 341 | !std::is_constructible<span<int, 2>, std::array<int, 3>&>::value, |
| 342 | "Error: span<int> with static extent should not be constructible " |
| 343 | "from l-value reference to std::array<int> with different extent"); |
| 344 | |
| 345 | static_assert( |
| 346 | !std::is_constructible<span<int, 4>, std::array<int, 3>&>::value, |
| 347 | "Error: span<int> with dynamic extent should not be constructible " |
| 348 | "from l-value reference to std::array<int> with different extent"); |
| 349 | |
| 350 | static_assert( |
| 351 | !std::is_constructible<span<int>, std::array<bool, 3>&>::value, |
| 352 | "Error: span<int> with dynamic extent should not be constructible " |
| 353 | "from l-value reference to std::array<bool>"); |
| 354 | } |
| 355 | |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 356 | TEST(SpanTest, ConstructFromConstexprArray) { |
| 357 | static constexpr int kArray[] = {5, 4, 3, 2, 1}; |
| 358 | |
| 359 | constexpr span<const int> dynamic_span(kArray); |
| 360 | static_assert(kArray == dynamic_span.data(), ""); |
| 361 | static_assert(std::size(kArray) == dynamic_span.size(), ""); |
| 362 | |
| 363 | static_assert(kArray[0] == dynamic_span[0], ""); |
| 364 | static_assert(kArray[1] == dynamic_span[1], ""); |
| 365 | static_assert(kArray[2] == dynamic_span[2], ""); |
| 366 | static_assert(kArray[3] == dynamic_span[3], ""); |
| 367 | static_assert(kArray[4] == dynamic_span[4], ""); |
| 368 | |
| 369 | constexpr span<const int, std::size(kArray)> static_span(kArray); |
| 370 | static_assert(kArray == static_span.data(), ""); |
| 371 | static_assert(std::size(kArray) == static_span.size(), ""); |
| 372 | |
| 373 | static_assert(kArray[0] == static_span[0], ""); |
| 374 | static_assert(kArray[1] == static_span[1], ""); |
| 375 | static_assert(kArray[2] == static_span[2], ""); |
| 376 | static_assert(kArray[3] == static_span[3], ""); |
| 377 | static_assert(kArray[4] == static_span[4], ""); |
| 378 | } |
| 379 | |
| 380 | TEST(SpanTest, ConstructFromArray) { |
| 381 | int array[] = {5, 4, 3, 2, 1}; |
| 382 | |
| 383 | span<const int> const_span(array); |
| 384 | EXPECT_EQ(array, const_span.data()); |
| 385 | EXPECT_EQ(std::size(array), const_span.size()); |
| 386 | for (size_t i = 0; i < const_span.size(); ++i) |
| 387 | EXPECT_EQ(array[i], const_span[i]); |
| 388 | |
| 389 | span<int> dynamic_span(array); |
| 390 | EXPECT_EQ(array, dynamic_span.data()); |
| 391 | EXPECT_EQ(std::size(array), dynamic_span.size()); |
| 392 | for (size_t i = 0; i < dynamic_span.size(); ++i) |
| 393 | EXPECT_EQ(array[i], dynamic_span[i]); |
| 394 | |
| 395 | span<int, std::size(array)> static_span(array); |
| 396 | EXPECT_EQ(array, static_span.data()); |
| 397 | EXPECT_EQ(std::size(array), static_span.size()); |
| 398 | for (size_t i = 0; i < static_span.size(); ++i) |
| 399 | EXPECT_EQ(array[i], static_span[i]); |
| 400 | } |
| 401 | |
| 402 | TEST(SpanTest, ConstructFromStdArray) { |
| 403 | // Note: Constructing a constexpr span from a constexpr std::array does not |
| 404 | // work prior to C++17 due to non-constexpr std::array::data. |
| 405 | std::array<int, 5> array = {{5, 4, 3, 2, 1}}; |
| 406 | |
| 407 | span<const int> const_span(array); |
| 408 | EXPECT_EQ(array.data(), const_span.data()); |
| 409 | EXPECT_EQ(array.size(), const_span.size()); |
| 410 | for (size_t i = 0; i < const_span.size(); ++i) |
| 411 | EXPECT_EQ(array[i], const_span[i]); |
| 412 | |
| 413 | span<int> dynamic_span(array); |
| 414 | EXPECT_EQ(array.data(), dynamic_span.data()); |
| 415 | EXPECT_EQ(array.size(), dynamic_span.size()); |
| 416 | for (size_t i = 0; i < dynamic_span.size(); ++i) |
| 417 | EXPECT_EQ(array[i], dynamic_span[i]); |
| 418 | |
| 419 | span<int, std::size(array)> static_span(array); |
| 420 | EXPECT_EQ(array.data(), static_span.data()); |
| 421 | EXPECT_EQ(array.size(), static_span.size()); |
| 422 | for (size_t i = 0; i < static_span.size(); ++i) |
| 423 | EXPECT_EQ(array[i], static_span[i]); |
| 424 | } |
| 425 | |
| 426 | TEST(SpanTest, ConstructFromInitializerList) { |
| 427 | std::initializer_list<int> il = {1, 1, 2, 3, 5, 8}; |
| 428 | |
| 429 | span<const int> const_span(il); |
| 430 | EXPECT_EQ(il.begin(), const_span.data()); |
| 431 | EXPECT_EQ(il.size(), const_span.size()); |
| 432 | |
| 433 | for (size_t i = 0; i < const_span.size(); ++i) |
| 434 | EXPECT_EQ(il.begin()[i], const_span[i]); |
| 435 | |
| 436 | span<const int, 6> static_span(il.begin(), il.end()); |
| 437 | EXPECT_EQ(il.begin(), static_span.data()); |
| 438 | EXPECT_EQ(il.size(), static_span.size()); |
| 439 | |
| 440 | for (size_t i = 0; i < static_span.size(); ++i) |
| 441 | EXPECT_EQ(il.begin()[i], static_span[i]); |
| 442 | } |
| 443 | |
| 444 | TEST(SpanTest, ConstructFromStdString) { |
| 445 | std::string str = "foobar"; |
| 446 | |
| 447 | span<const char> const_span(str); |
| 448 | EXPECT_EQ(str.data(), const_span.data()); |
| 449 | EXPECT_EQ(str.size(), const_span.size()); |
| 450 | |
| 451 | for (size_t i = 0; i < const_span.size(); ++i) |
| 452 | EXPECT_EQ(str[i], const_span[i]); |
| 453 | |
| 454 | span<char> dynamic_span(str); |
| 455 | EXPECT_EQ(str.data(), dynamic_span.data()); |
| 456 | EXPECT_EQ(str.size(), dynamic_span.size()); |
| 457 | |
| 458 | for (size_t i = 0; i < dynamic_span.size(); ++i) |
| 459 | EXPECT_EQ(str[i], dynamic_span[i]); |
| 460 | |
| 461 | span<char, 6> static_span(data(str), str.size()); |
| 462 | EXPECT_EQ(str.data(), static_span.data()); |
| 463 | EXPECT_EQ(str.size(), static_span.size()); |
| 464 | |
| 465 | for (size_t i = 0; i < static_span.size(); ++i) |
| 466 | EXPECT_EQ(str[i], static_span[i]); |
| 467 | } |
| 468 | |
| 469 | TEST(SpanTest, ConstructFromConstContainer) { |
| 470 | const std::vector<int> vector = {1, 1, 2, 3, 5, 8}; |
| 471 | |
| 472 | span<const int> const_span(vector); |
| 473 | EXPECT_EQ(vector.data(), const_span.data()); |
| 474 | EXPECT_EQ(vector.size(), const_span.size()); |
| 475 | |
| 476 | for (size_t i = 0; i < const_span.size(); ++i) |
| 477 | EXPECT_EQ(vector[i], const_span[i]); |
| 478 | |
| 479 | span<const int, 6> static_span(vector.data(), vector.size()); |
| 480 | EXPECT_EQ(vector.data(), static_span.data()); |
| 481 | EXPECT_EQ(vector.size(), static_span.size()); |
| 482 | |
| 483 | for (size_t i = 0; i < static_span.size(); ++i) |
| 484 | EXPECT_EQ(vector[i], static_span[i]); |
| 485 | } |
| 486 | |
| 487 | TEST(SpanTest, ConstructFromContainer) { |
| 488 | std::vector<int> vector = {1, 1, 2, 3, 5, 8}; |
| 489 | |
| 490 | span<const int> const_span(vector); |
| 491 | EXPECT_EQ(vector.data(), const_span.data()); |
| 492 | EXPECT_EQ(vector.size(), const_span.size()); |
| 493 | |
| 494 | for (size_t i = 0; i < const_span.size(); ++i) |
| 495 | EXPECT_EQ(vector[i], const_span[i]); |
| 496 | |
| 497 | span<int> dynamic_span(vector); |
| 498 | EXPECT_EQ(vector.data(), dynamic_span.data()); |
| 499 | EXPECT_EQ(vector.size(), dynamic_span.size()); |
| 500 | |
| 501 | for (size_t i = 0; i < dynamic_span.size(); ++i) |
| 502 | EXPECT_EQ(vector[i], dynamic_span[i]); |
| 503 | |
| 504 | span<int, 6> static_span(vector.data(), vector.size()); |
| 505 | EXPECT_EQ(vector.data(), static_span.data()); |
| 506 | EXPECT_EQ(vector.size(), static_span.size()); |
| 507 | |
| 508 | for (size_t i = 0; i < static_span.size(); ++i) |
| 509 | EXPECT_EQ(vector[i], static_span[i]); |
| 510 | } |
| 511 | |
| 512 | #if 0 |
| 513 | |
| 514 | // Pigweed: gMock matchers are not yet supported. |
| 515 | TEST(SpanTest, ConvertNonConstIntegralToConst) { |
| 516 | std::vector<int> vector = {1, 1, 2, 3, 5, 8}; |
| 517 | |
| 518 | span<int> int_span(vector.data(), vector.size()); |
| 519 | span<const int> const_span(int_span); |
| 520 | EXPECT_EQ(int_span.size(), const_span.size()); |
| 521 | |
| 522 | EXPECT_THAT(const_span, Pointwise(Eq(), int_span)); |
| 523 | |
| 524 | span<int, 6> static_int_span(vector.data(), vector.size()); |
| 525 | span<const int, 6> static_const_span(static_int_span); |
| 526 | EXPECT_THAT(static_const_span, Pointwise(Eq(), static_int_span)); |
| 527 | } |
| 528 | |
| 529 | // Pigweed: gMock matchers are not yet supported. |
| 530 | TEST(SpanTest, ConvertNonConstPointerToConst) { |
| 531 | auto a = std::make_unique<int>(11); |
| 532 | auto b = std::make_unique<int>(22); |
| 533 | auto c = std::make_unique<int>(33); |
| 534 | std::vector<int*> vector = {a.get(), b.get(), c.get()}; |
| 535 | |
| 536 | span<int*> non_const_pointer_span(vector); |
| 537 | EXPECT_THAT(non_const_pointer_span, Pointwise(Eq(), vector)); |
| 538 | span<int* const> const_pointer_span(non_const_pointer_span); |
| 539 | EXPECT_THAT(const_pointer_span, Pointwise(Eq(), non_const_pointer_span)); |
| 540 | // Note: no test for conversion from span<int> to span<const int*>, since that |
| 541 | // would imply a conversion from int** to const int**, which is unsafe. |
| 542 | // |
| 543 | // Note: no test for conversion from span<int*> to span<const int* const>, |
| 544 | // due to CWG Defect 330: |
| 545 | // http://open-std.org/JTC1/SC22/WG21/docs/cwg_defects.html#330 |
| 546 | |
| 547 | span<int*, 3> static_non_const_pointer_span(vector.data(), vector.size()); |
| 548 | EXPECT_THAT(static_non_const_pointer_span, Pointwise(Eq(), vector)); |
| 549 | span<int* const, 3> static_const_pointer_span(static_non_const_pointer_span); |
| 550 | EXPECT_THAT(static_const_pointer_span, |
| 551 | Pointwise(Eq(), static_non_const_pointer_span)); |
| 552 | } |
| 553 | |
| 554 | // Pigweed: This test does not work on platforms where int32_t is long int. |
| 555 | TEST(SpanTest, ConvertBetweenEquivalentTypes) { |
| 556 | std::vector<int32_t> vector = {2, 4, 8, 16, 32}; |
| 557 | |
| 558 | span<int32_t> int32_t_span(vector); |
| 559 | span<int> converted_span(int32_t_span); |
| 560 | EXPECT_EQ(int32_t_span.data(), converted_span.data()); |
| 561 | EXPECT_EQ(int32_t_span.size(), converted_span.size()); |
| 562 | |
| 563 | span<int32_t, 5> static_int32_t_span(vector.data(), vector.size()); |
| 564 | span<int, 5> static_converted_span(static_int32_t_span); |
| 565 | EXPECT_EQ(static_int32_t_span.data(), static_converted_span.data()); |
| 566 | EXPECT_EQ(static_int32_t_span.size(), static_converted_span.size()); |
| 567 | } |
| 568 | |
| 569 | #endif // 0 |
| 570 | |
| 571 | TEST(SpanTest, TemplatedFirst) { |
| 572 | static constexpr int array[] = {1, 2, 3}; |
| 573 | constexpr span<const int, 3> span(array); |
| 574 | |
| 575 | { |
| 576 | constexpr auto subspan = span.first<0>(); |
| 577 | static_assert(span.data() == subspan.data(), ""); |
Rob Mohr | cd59b7e | 2019-11-19 09:54:45 -0800 | [diff] [blame] | 578 | static_assert(subspan.empty(), ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 579 | static_assert(0u == decltype(subspan)::extent, ""); |
| 580 | } |
| 581 | |
| 582 | { |
| 583 | constexpr auto subspan = span.first<1>(); |
| 584 | static_assert(span.data() == subspan.data(), ""); |
| 585 | static_assert(1u == subspan.size(), ""); |
| 586 | static_assert(1u == decltype(subspan)::extent, ""); |
| 587 | static_assert(1 == subspan[0], ""); |
| 588 | } |
| 589 | |
| 590 | { |
| 591 | constexpr auto subspan = span.first<2>(); |
| 592 | static_assert(span.data() == subspan.data(), ""); |
| 593 | static_assert(2u == subspan.size(), ""); |
| 594 | static_assert(2u == decltype(subspan)::extent, ""); |
| 595 | static_assert(1 == subspan[0], ""); |
| 596 | static_assert(2 == subspan[1], ""); |
| 597 | } |
| 598 | |
| 599 | { |
| 600 | constexpr auto subspan = span.first<3>(); |
| 601 | static_assert(span.data() == subspan.data(), ""); |
| 602 | static_assert(3u == subspan.size(), ""); |
| 603 | static_assert(3u == decltype(subspan)::extent, ""); |
| 604 | static_assert(1 == subspan[0], ""); |
| 605 | static_assert(2 == subspan[1], ""); |
| 606 | static_assert(3 == subspan[2], ""); |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | TEST(SpanTest, TemplatedLast) { |
| 611 | static constexpr int array[] = {1, 2, 3}; |
| 612 | constexpr span<const int, 3> span(array); |
| 613 | |
| 614 | { |
| 615 | constexpr auto subspan = span.last<0>(); |
| 616 | static_assert(span.data() + 3 == subspan.data(), ""); |
Rob Mohr | cd59b7e | 2019-11-19 09:54:45 -0800 | [diff] [blame] | 617 | static_assert(subspan.empty(), ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 618 | static_assert(0u == decltype(subspan)::extent, ""); |
| 619 | } |
| 620 | |
| 621 | { |
| 622 | constexpr auto subspan = span.last<1>(); |
| 623 | static_assert(span.data() + 2 == subspan.data(), ""); |
| 624 | static_assert(1u == subspan.size(), ""); |
| 625 | static_assert(1u == decltype(subspan)::extent, ""); |
| 626 | static_assert(3 == subspan[0], ""); |
| 627 | } |
| 628 | |
| 629 | { |
| 630 | constexpr auto subspan = span.last<2>(); |
| 631 | static_assert(span.data() + 1 == subspan.data(), ""); |
| 632 | static_assert(2u == subspan.size(), ""); |
| 633 | static_assert(2u == decltype(subspan)::extent, ""); |
| 634 | static_assert(2 == subspan[0], ""); |
| 635 | static_assert(3 == subspan[1], ""); |
| 636 | } |
| 637 | |
| 638 | { |
| 639 | constexpr auto subspan = span.last<3>(); |
| 640 | static_assert(span.data() == subspan.data(), ""); |
| 641 | static_assert(3u == subspan.size(), ""); |
| 642 | static_assert(3u == decltype(subspan)::extent, ""); |
| 643 | static_assert(1 == subspan[0], ""); |
| 644 | static_assert(2 == subspan[1], ""); |
| 645 | static_assert(3 == subspan[2], ""); |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | TEST(SpanTest, TemplatedSubspan) { |
| 650 | static constexpr int array[] = {1, 2, 3}; |
| 651 | constexpr span<const int, 3> span(array); |
| 652 | |
| 653 | { |
| 654 | constexpr auto subspan = span.subspan<0>(); |
| 655 | static_assert(span.data() == subspan.data(), ""); |
| 656 | static_assert(3u == subspan.size(), ""); |
| 657 | static_assert(3u == decltype(subspan)::extent, ""); |
| 658 | static_assert(1 == subspan[0], ""); |
| 659 | static_assert(2 == subspan[1], ""); |
| 660 | static_assert(3 == subspan[2], ""); |
| 661 | } |
| 662 | |
| 663 | { |
| 664 | constexpr auto subspan = span.subspan<1>(); |
| 665 | static_assert(span.data() + 1 == subspan.data(), ""); |
| 666 | static_assert(2u == subspan.size(), ""); |
| 667 | static_assert(2u == decltype(subspan)::extent, ""); |
| 668 | static_assert(2 == subspan[0], ""); |
| 669 | static_assert(3 == subspan[1], ""); |
| 670 | } |
| 671 | |
| 672 | { |
| 673 | constexpr auto subspan = span.subspan<2>(); |
| 674 | static_assert(span.data() + 2 == subspan.data(), ""); |
| 675 | static_assert(1u == subspan.size(), ""); |
| 676 | static_assert(1u == decltype(subspan)::extent, ""); |
| 677 | static_assert(3 == subspan[0], ""); |
| 678 | } |
| 679 | |
| 680 | { |
| 681 | constexpr auto subspan = span.subspan<3>(); |
| 682 | static_assert(span.data() + 3 == subspan.data(), ""); |
Rob Mohr | cd59b7e | 2019-11-19 09:54:45 -0800 | [diff] [blame] | 683 | static_assert(subspan.empty(), ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 684 | static_assert(0u == decltype(subspan)::extent, ""); |
| 685 | } |
| 686 | |
| 687 | { |
| 688 | constexpr auto subspan = span.subspan<0, 0>(); |
| 689 | static_assert(span.data() == subspan.data(), ""); |
Rob Mohr | cd59b7e | 2019-11-19 09:54:45 -0800 | [diff] [blame] | 690 | static_assert(subspan.empty(), ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 691 | static_assert(0u == decltype(subspan)::extent, ""); |
| 692 | } |
| 693 | |
| 694 | { |
| 695 | constexpr auto subspan = span.subspan<1, 0>(); |
| 696 | static_assert(span.data() + 1 == subspan.data(), ""); |
Rob Mohr | cd59b7e | 2019-11-19 09:54:45 -0800 | [diff] [blame] | 697 | static_assert(subspan.empty(), ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 698 | static_assert(0u == decltype(subspan)::extent, ""); |
| 699 | } |
| 700 | |
| 701 | { |
| 702 | constexpr auto subspan = span.subspan<2, 0>(); |
| 703 | static_assert(span.data() + 2 == subspan.data(), ""); |
Rob Mohr | cd59b7e | 2019-11-19 09:54:45 -0800 | [diff] [blame] | 704 | static_assert(subspan.empty(), ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 705 | static_assert(0u == decltype(subspan)::extent, ""); |
| 706 | } |
| 707 | |
| 708 | { |
| 709 | constexpr auto subspan = span.subspan<0, 1>(); |
| 710 | static_assert(span.data() == subspan.data(), ""); |
| 711 | static_assert(1u == subspan.size(), ""); |
| 712 | static_assert(1u == decltype(subspan)::extent, ""); |
| 713 | static_assert(1 == subspan[0], ""); |
| 714 | } |
| 715 | |
| 716 | { |
| 717 | constexpr auto subspan = span.subspan<1, 1>(); |
| 718 | static_assert(span.data() + 1 == subspan.data(), ""); |
| 719 | static_assert(1u == subspan.size(), ""); |
| 720 | static_assert(1u == decltype(subspan)::extent, ""); |
| 721 | static_assert(2 == subspan[0], ""); |
| 722 | } |
| 723 | |
| 724 | { |
| 725 | constexpr auto subspan = span.subspan<2, 1>(); |
| 726 | static_assert(span.data() + 2 == subspan.data(), ""); |
| 727 | static_assert(1u == subspan.size(), ""); |
| 728 | static_assert(1u == decltype(subspan)::extent, ""); |
| 729 | static_assert(3 == subspan[0], ""); |
| 730 | } |
| 731 | |
| 732 | { |
| 733 | constexpr auto subspan = span.subspan<0, 2>(); |
| 734 | static_assert(span.data() == subspan.data(), ""); |
| 735 | static_assert(2u == subspan.size(), ""); |
| 736 | static_assert(2u == decltype(subspan)::extent, ""); |
| 737 | static_assert(1 == subspan[0], ""); |
| 738 | static_assert(2 == subspan[1], ""); |
| 739 | } |
| 740 | |
| 741 | { |
| 742 | constexpr auto subspan = span.subspan<1, 2>(); |
| 743 | static_assert(span.data() + 1 == subspan.data(), ""); |
| 744 | static_assert(2u == subspan.size(), ""); |
| 745 | static_assert(2u == decltype(subspan)::extent, ""); |
| 746 | static_assert(2 == subspan[0], ""); |
| 747 | static_assert(3 == subspan[1], ""); |
| 748 | } |
| 749 | |
| 750 | { |
| 751 | constexpr auto subspan = span.subspan<0, 3>(); |
| 752 | static_assert(span.data() == subspan.data(), ""); |
| 753 | static_assert(3u == subspan.size(), ""); |
| 754 | static_assert(3u == decltype(subspan)::extent, ""); |
| 755 | static_assert(1 == subspan[0], ""); |
| 756 | static_assert(2 == subspan[1], ""); |
| 757 | static_assert(3 == subspan[2], ""); |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | TEST(SpanTest, SubscriptedBeginIterator) { |
| 762 | int array[] = {1, 2, 3}; |
| 763 | span<const int> const_span(array); |
| 764 | for (size_t i = 0; i < const_span.size(); ++i) |
| 765 | EXPECT_EQ(array[i], const_span.begin()[i]); |
| 766 | |
| 767 | span<int> mutable_span(array); |
| 768 | for (size_t i = 0; i < mutable_span.size(); ++i) |
| 769 | EXPECT_EQ(array[i], mutable_span.begin()[i]); |
| 770 | } |
| 771 | |
| 772 | TEST(SpanTest, TemplatedFirstOnDynamicSpan) { |
| 773 | int array[] = {1, 2, 3}; |
| 774 | span<const int> span(array); |
| 775 | |
| 776 | { |
| 777 | auto subspan = span.first<0>(); |
| 778 | EXPECT_EQ(span.data(), subspan.data()); |
| 779 | EXPECT_EQ(0u, subspan.size()); |
| 780 | static_assert(0u == decltype(subspan)::extent, ""); |
| 781 | } |
| 782 | |
| 783 | { |
| 784 | auto subspan = span.first<1>(); |
| 785 | EXPECT_EQ(span.data(), subspan.data()); |
| 786 | EXPECT_EQ(1u, subspan.size()); |
| 787 | static_assert(1u == decltype(subspan)::extent, ""); |
| 788 | EXPECT_EQ(1, subspan[0]); |
| 789 | } |
| 790 | |
| 791 | { |
| 792 | auto subspan = span.first<2>(); |
| 793 | EXPECT_EQ(span.data(), subspan.data()); |
| 794 | EXPECT_EQ(2u, subspan.size()); |
| 795 | static_assert(2u == decltype(subspan)::extent, ""); |
| 796 | EXPECT_EQ(1, subspan[0]); |
| 797 | EXPECT_EQ(2, subspan[1]); |
| 798 | } |
| 799 | |
| 800 | { |
| 801 | auto subspan = span.first<3>(); |
| 802 | EXPECT_EQ(span.data(), subspan.data()); |
| 803 | EXPECT_EQ(3u, subspan.size()); |
| 804 | static_assert(3u == decltype(subspan)::extent, ""); |
| 805 | EXPECT_EQ(1, subspan[0]); |
| 806 | EXPECT_EQ(2, subspan[1]); |
| 807 | EXPECT_EQ(3, subspan[2]); |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | TEST(SpanTest, TemplatedLastOnDynamicSpan) { |
| 812 | int array[] = {1, 2, 3}; |
| 813 | span<int> span(array); |
| 814 | |
| 815 | { |
| 816 | auto subspan = span.last<0>(); |
| 817 | EXPECT_EQ(span.data() + 3, subspan.data()); |
| 818 | EXPECT_EQ(0u, subspan.size()); |
| 819 | static_assert(0u == decltype(subspan)::extent, ""); |
| 820 | } |
| 821 | |
| 822 | { |
| 823 | auto subspan = span.last<1>(); |
| 824 | EXPECT_EQ(span.data() + 2, subspan.data()); |
| 825 | EXPECT_EQ(1u, subspan.size()); |
| 826 | static_assert(1u == decltype(subspan)::extent, ""); |
| 827 | EXPECT_EQ(3, subspan[0]); |
| 828 | } |
| 829 | |
| 830 | { |
| 831 | auto subspan = span.last<2>(); |
| 832 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 833 | EXPECT_EQ(2u, subspan.size()); |
| 834 | static_assert(2u == decltype(subspan)::extent, ""); |
| 835 | EXPECT_EQ(2, subspan[0]); |
| 836 | EXPECT_EQ(3, subspan[1]); |
| 837 | } |
| 838 | |
| 839 | { |
| 840 | auto subspan = span.last<3>(); |
| 841 | EXPECT_EQ(span.data(), subspan.data()); |
| 842 | EXPECT_EQ(3u, subspan.size()); |
| 843 | static_assert(3u == decltype(subspan)::extent, ""); |
| 844 | EXPECT_EQ(1, subspan[0]); |
| 845 | EXPECT_EQ(2, subspan[1]); |
| 846 | EXPECT_EQ(3, subspan[2]); |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | TEST(SpanTest, TemplatedSubspanFromDynamicSpan) { |
| 851 | int array[] = {1, 2, 3}; |
| 852 | span<int, 3> span(array); |
| 853 | |
| 854 | { |
| 855 | auto subspan = span.subspan<0>(); |
| 856 | EXPECT_EQ(span.data(), subspan.data()); |
| 857 | static_assert(3u == decltype(subspan)::extent, ""); |
| 858 | EXPECT_EQ(3u, subspan.size()); |
| 859 | EXPECT_EQ(1, subspan[0]); |
| 860 | EXPECT_EQ(2, subspan[1]); |
| 861 | EXPECT_EQ(3, subspan[2]); |
| 862 | } |
| 863 | |
| 864 | { |
| 865 | auto subspan = span.subspan<1>(); |
| 866 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 867 | EXPECT_EQ(2u, subspan.size()); |
| 868 | static_assert(2u == decltype(subspan)::extent, ""); |
| 869 | EXPECT_EQ(2, subspan[0]); |
| 870 | EXPECT_EQ(3, subspan[1]); |
| 871 | } |
| 872 | |
| 873 | { |
| 874 | auto subspan = span.subspan<2>(); |
| 875 | EXPECT_EQ(span.data() + 2, subspan.data()); |
| 876 | EXPECT_EQ(1u, subspan.size()); |
| 877 | static_assert(1u == decltype(subspan)::extent, ""); |
| 878 | EXPECT_EQ(3, subspan[0]); |
| 879 | } |
| 880 | |
| 881 | { |
| 882 | auto subspan = span.subspan<3>(); |
| 883 | EXPECT_EQ(span.data() + 3, subspan.data()); |
| 884 | EXPECT_EQ(0u, subspan.size()); |
| 885 | static_assert(0u == decltype(subspan)::extent, ""); |
| 886 | } |
| 887 | |
| 888 | { |
| 889 | auto subspan = span.subspan<0, 0>(); |
| 890 | EXPECT_EQ(span.data(), subspan.data()); |
| 891 | EXPECT_EQ(0u, subspan.size()); |
| 892 | static_assert(0u == decltype(subspan)::extent, ""); |
| 893 | } |
| 894 | |
| 895 | { |
| 896 | auto subspan = span.subspan<1, 0>(); |
| 897 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 898 | EXPECT_EQ(0u, subspan.size()); |
| 899 | static_assert(0u == decltype(subspan)::extent, ""); |
| 900 | } |
| 901 | |
| 902 | { |
| 903 | auto subspan = span.subspan<2, 0>(); |
| 904 | EXPECT_EQ(span.data() + 2, subspan.data()); |
| 905 | EXPECT_EQ(0u, subspan.size()); |
| 906 | static_assert(0u == decltype(subspan)::extent, ""); |
| 907 | } |
| 908 | |
| 909 | { |
| 910 | auto subspan = span.subspan<0, 1>(); |
| 911 | EXPECT_EQ(span.data(), subspan.data()); |
| 912 | EXPECT_EQ(1u, subspan.size()); |
| 913 | static_assert(1u == decltype(subspan)::extent, ""); |
| 914 | EXPECT_EQ(1, subspan[0]); |
| 915 | } |
| 916 | |
| 917 | { |
| 918 | auto subspan = span.subspan<1, 1>(); |
| 919 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 920 | EXPECT_EQ(1u, subspan.size()); |
| 921 | static_assert(1u == decltype(subspan)::extent, ""); |
| 922 | EXPECT_EQ(2, subspan[0]); |
| 923 | } |
| 924 | |
| 925 | { |
| 926 | auto subspan = span.subspan<2, 1>(); |
| 927 | EXPECT_EQ(span.data() + 2, subspan.data()); |
| 928 | EXPECT_EQ(1u, subspan.size()); |
| 929 | static_assert(1u == decltype(subspan)::extent, ""); |
| 930 | EXPECT_EQ(3, subspan[0]); |
| 931 | } |
| 932 | |
| 933 | { |
| 934 | auto subspan = span.subspan<0, 2>(); |
| 935 | EXPECT_EQ(span.data(), subspan.data()); |
| 936 | EXPECT_EQ(2u, subspan.size()); |
| 937 | static_assert(2u == decltype(subspan)::extent, ""); |
| 938 | EXPECT_EQ(1, subspan[0]); |
| 939 | EXPECT_EQ(2, subspan[1]); |
| 940 | } |
| 941 | |
| 942 | { |
| 943 | auto subspan = span.subspan<1, 2>(); |
| 944 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 945 | EXPECT_EQ(2u, subspan.size()); |
| 946 | static_assert(2u == decltype(subspan)::extent, ""); |
| 947 | EXPECT_EQ(2, subspan[0]); |
| 948 | EXPECT_EQ(3, subspan[1]); |
| 949 | } |
| 950 | |
| 951 | { |
| 952 | auto subspan = span.subspan<0, 3>(); |
| 953 | EXPECT_EQ(span.data(), subspan.data()); |
| 954 | EXPECT_EQ(3u, subspan.size()); |
| 955 | static_assert(3u == decltype(subspan)::extent, ""); |
| 956 | EXPECT_EQ(1, subspan[0]); |
| 957 | EXPECT_EQ(2, subspan[1]); |
| 958 | EXPECT_EQ(3, subspan[2]); |
| 959 | } |
| 960 | } |
| 961 | |
| 962 | TEST(SpanTest, First) { |
| 963 | int array[] = {1, 2, 3}; |
| 964 | span<int> span(array); |
| 965 | |
| 966 | { |
| 967 | auto subspan = span.first(0); |
| 968 | EXPECT_EQ(span.data(), subspan.data()); |
| 969 | EXPECT_EQ(0u, subspan.size()); |
| 970 | } |
| 971 | |
| 972 | { |
| 973 | auto subspan = span.first(1); |
| 974 | EXPECT_EQ(span.data(), subspan.data()); |
| 975 | EXPECT_EQ(1u, subspan.size()); |
| 976 | EXPECT_EQ(1, subspan[0]); |
| 977 | } |
| 978 | |
| 979 | { |
| 980 | auto subspan = span.first(2); |
| 981 | EXPECT_EQ(span.data(), subspan.data()); |
| 982 | EXPECT_EQ(2u, subspan.size()); |
| 983 | EXPECT_EQ(1, subspan[0]); |
| 984 | EXPECT_EQ(2, subspan[1]); |
| 985 | } |
| 986 | |
| 987 | { |
| 988 | auto subspan = span.first(3); |
| 989 | EXPECT_EQ(span.data(), subspan.data()); |
| 990 | EXPECT_EQ(3u, subspan.size()); |
| 991 | EXPECT_EQ(1, subspan[0]); |
| 992 | EXPECT_EQ(2, subspan[1]); |
| 993 | EXPECT_EQ(3, subspan[2]); |
| 994 | } |
| 995 | } |
| 996 | |
| 997 | TEST(SpanTest, Last) { |
| 998 | int array[] = {1, 2, 3}; |
| 999 | span<int> span(array); |
| 1000 | |
| 1001 | { |
| 1002 | auto subspan = span.last(0); |
| 1003 | EXPECT_EQ(span.data() + 3, subspan.data()); |
| 1004 | EXPECT_EQ(0u, subspan.size()); |
| 1005 | } |
| 1006 | |
| 1007 | { |
| 1008 | auto subspan = span.last(1); |
| 1009 | EXPECT_EQ(span.data() + 2, subspan.data()); |
| 1010 | EXPECT_EQ(1u, subspan.size()); |
| 1011 | EXPECT_EQ(3, subspan[0]); |
| 1012 | } |
| 1013 | |
| 1014 | { |
| 1015 | auto subspan = span.last(2); |
| 1016 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 1017 | EXPECT_EQ(2u, subspan.size()); |
| 1018 | EXPECT_EQ(2, subspan[0]); |
| 1019 | EXPECT_EQ(3, subspan[1]); |
| 1020 | } |
| 1021 | |
| 1022 | { |
| 1023 | auto subspan = span.last(3); |
| 1024 | EXPECT_EQ(span.data(), subspan.data()); |
| 1025 | EXPECT_EQ(3u, subspan.size()); |
| 1026 | EXPECT_EQ(1, subspan[0]); |
| 1027 | EXPECT_EQ(2, subspan[1]); |
| 1028 | EXPECT_EQ(3, subspan[2]); |
| 1029 | } |
| 1030 | } |
| 1031 | |
| 1032 | TEST(SpanTest, Subspan) { |
| 1033 | int array[] = {1, 2, 3}; |
| 1034 | span<int> span(array); |
| 1035 | |
| 1036 | { |
| 1037 | auto subspan = span.subspan(0); |
| 1038 | EXPECT_EQ(span.data(), subspan.data()); |
| 1039 | EXPECT_EQ(3u, subspan.size()); |
| 1040 | EXPECT_EQ(1, subspan[0]); |
| 1041 | EXPECT_EQ(2, subspan[1]); |
| 1042 | EXPECT_EQ(3, subspan[2]); |
| 1043 | } |
| 1044 | |
| 1045 | { |
| 1046 | auto subspan = span.subspan(1); |
| 1047 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 1048 | EXPECT_EQ(2u, subspan.size()); |
| 1049 | EXPECT_EQ(2, subspan[0]); |
| 1050 | EXPECT_EQ(3, subspan[1]); |
| 1051 | } |
| 1052 | |
| 1053 | { |
| 1054 | auto subspan = span.subspan(2); |
| 1055 | EXPECT_EQ(span.data() + 2, subspan.data()); |
| 1056 | EXPECT_EQ(1u, subspan.size()); |
| 1057 | EXPECT_EQ(3, subspan[0]); |
| 1058 | } |
| 1059 | |
| 1060 | { |
| 1061 | auto subspan = span.subspan(3); |
| 1062 | EXPECT_EQ(span.data() + 3, subspan.data()); |
| 1063 | EXPECT_EQ(0u, subspan.size()); |
| 1064 | } |
| 1065 | |
| 1066 | { |
| 1067 | auto subspan = span.subspan(0, 0); |
| 1068 | EXPECT_EQ(span.data(), subspan.data()); |
| 1069 | EXPECT_EQ(0u, subspan.size()); |
| 1070 | } |
| 1071 | |
| 1072 | { |
| 1073 | auto subspan = span.subspan(1, 0); |
| 1074 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 1075 | EXPECT_EQ(0u, subspan.size()); |
| 1076 | } |
| 1077 | |
| 1078 | { |
| 1079 | auto subspan = span.subspan(2, 0); |
| 1080 | EXPECT_EQ(span.data() + 2, subspan.data()); |
| 1081 | EXPECT_EQ(0u, subspan.size()); |
| 1082 | } |
| 1083 | |
| 1084 | { |
| 1085 | auto subspan = span.subspan(0, 1); |
| 1086 | EXPECT_EQ(span.data(), subspan.data()); |
| 1087 | EXPECT_EQ(1u, subspan.size()); |
| 1088 | EXPECT_EQ(1, subspan[0]); |
| 1089 | } |
| 1090 | |
| 1091 | { |
| 1092 | auto subspan = span.subspan(1, 1); |
| 1093 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 1094 | EXPECT_EQ(1u, subspan.size()); |
| 1095 | EXPECT_EQ(2, subspan[0]); |
| 1096 | } |
| 1097 | |
| 1098 | { |
| 1099 | auto subspan = span.subspan(2, 1); |
| 1100 | EXPECT_EQ(span.data() + 2, subspan.data()); |
| 1101 | EXPECT_EQ(1u, subspan.size()); |
| 1102 | EXPECT_EQ(3, subspan[0]); |
| 1103 | } |
| 1104 | |
| 1105 | { |
| 1106 | auto subspan = span.subspan(0, 2); |
| 1107 | EXPECT_EQ(span.data(), subspan.data()); |
| 1108 | EXPECT_EQ(2u, subspan.size()); |
| 1109 | EXPECT_EQ(1, subspan[0]); |
| 1110 | EXPECT_EQ(2, subspan[1]); |
| 1111 | } |
| 1112 | |
| 1113 | { |
| 1114 | auto subspan = span.subspan(1, 2); |
| 1115 | EXPECT_EQ(span.data() + 1, subspan.data()); |
| 1116 | EXPECT_EQ(2u, subspan.size()); |
| 1117 | EXPECT_EQ(2, subspan[0]); |
| 1118 | EXPECT_EQ(3, subspan[1]); |
| 1119 | } |
| 1120 | |
| 1121 | { |
| 1122 | auto subspan = span.subspan(0, 3); |
| 1123 | EXPECT_EQ(span.data(), subspan.data()); |
| 1124 | EXPECT_EQ(span.size(), subspan.size()); |
| 1125 | EXPECT_EQ(1, subspan[0]); |
| 1126 | EXPECT_EQ(2, subspan[1]); |
| 1127 | EXPECT_EQ(3, subspan[2]); |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | TEST(SpanTest, Size) { |
| 1132 | { |
| 1133 | span<int> span; |
| 1134 | EXPECT_EQ(0u, span.size()); |
| 1135 | } |
| 1136 | |
| 1137 | { |
| 1138 | int array[] = {1, 2, 3}; |
| 1139 | span<int> span(array); |
| 1140 | EXPECT_EQ(3u, span.size()); |
| 1141 | } |
| 1142 | } |
| 1143 | |
| 1144 | TEST(SpanTest, SizeBytes) { |
| 1145 | { |
| 1146 | span<int> span; |
| 1147 | EXPECT_EQ(0u, span.size_bytes()); |
| 1148 | } |
| 1149 | |
| 1150 | { |
| 1151 | int array[] = {1, 2, 3}; |
| 1152 | span<int> span(array); |
| 1153 | EXPECT_EQ(3u * sizeof(int), span.size_bytes()); |
| 1154 | } |
| 1155 | } |
| 1156 | |
| 1157 | TEST(SpanTest, Empty) { |
| 1158 | { |
| 1159 | span<int> span; |
| 1160 | EXPECT_TRUE(span.empty()); |
| 1161 | } |
| 1162 | |
| 1163 | { |
| 1164 | int array[] = {1, 2, 3}; |
| 1165 | span<int> span(array); |
| 1166 | EXPECT_FALSE(span.empty()); |
| 1167 | } |
| 1168 | } |
| 1169 | |
| 1170 | TEST(SpanTest, OperatorAt) { |
| 1171 | static constexpr int kArray[] = {1, 6, 1, 8, 0}; |
| 1172 | constexpr span<const int> span(kArray); |
| 1173 | |
| 1174 | static_assert(&kArray[0] == &span[0], |
| 1175 | "span[0] does not refer to the same element as kArray[0]"); |
| 1176 | static_assert(&kArray[1] == &span[1], |
| 1177 | "span[1] does not refer to the same element as kArray[1]"); |
| 1178 | static_assert(&kArray[2] == &span[2], |
| 1179 | "span[2] does not refer to the same element as kArray[2]"); |
| 1180 | static_assert(&kArray[3] == &span[3], |
| 1181 | "span[3] does not refer to the same element as kArray[3]"); |
| 1182 | static_assert(&kArray[4] == &span[4], |
| 1183 | "span[4] does not refer to the same element as kArray[4]"); |
| 1184 | } |
| 1185 | |
| 1186 | TEST(SpanTest, Front) { |
| 1187 | static constexpr int kArray[] = {1, 6, 1, 8, 0}; |
| 1188 | constexpr span<const int> span(kArray); |
| 1189 | static_assert(&kArray[0] == &span.front(), |
| 1190 | "span.front() does not refer to the same element as kArray[0]"); |
| 1191 | } |
| 1192 | |
| 1193 | TEST(SpanTest, Back) { |
| 1194 | static constexpr int kArray[] = {1, 6, 1, 8, 0}; |
| 1195 | constexpr span<const int> span(kArray); |
| 1196 | static_assert(&kArray[4] == &span.back(), |
| 1197 | "span.back() does not refer to the same element as kArray[4]"); |
| 1198 | } |
| 1199 | |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1200 | // Pigweed: This test uses gMock features not yet supported in Pigweed. |
| 1201 | #if 0 |
| 1202 | TEST(SpanTest, Iterator) { |
| 1203 | static constexpr int kArray[] = {1, 6, 1, 8, 0}; |
| 1204 | constexpr span<const int> span(kArray); |
| 1205 | |
| 1206 | std::vector<int> results; |
| 1207 | for (int i : span) |
| 1208 | results.emplace_back(i); |
| 1209 | EXPECT_THAT(results, ElementsAre(1, 6, 1, 8, 0)); |
| 1210 | } |
| 1211 | #endif // 0 |
| 1212 | |
| 1213 | TEST(SpanTest, ConstexprIterator) { |
| 1214 | static constexpr int kArray[] = {1, 6, 1, 8, 0}; |
| 1215 | constexpr span<const int> span(kArray); |
| 1216 | |
Wyatt Hepler | 83d4248 | 2019-11-19 15:17:33 -0800 | [diff] [blame] | 1217 | static_assert( |
| 1218 | constexpr_equal( |
| 1219 | std::begin(kArray), std::end(kArray), span.begin(), span.end()), |
| 1220 | ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1221 | static_assert(1 == span.begin()[0], ""); |
| 1222 | // Pigweed: These tests assume an iterator object, but Pigweed's span uses a |
| 1223 | // simple pointer. |
| 1224 | #if 0 |
| 1225 | static_assert(1 == *(span.begin() += 0), ""); |
| 1226 | static_assert(6 == *(span.begin() += 1), ""); |
| 1227 | |
| 1228 | static_assert(1 == *((span.begin() + 1) -= 1), ""); |
| 1229 | static_assert(6 == *((span.begin() + 1) -= 0), ""); |
| 1230 | #endif // 0 |
| 1231 | } |
| 1232 | |
| 1233 | TEST(SpanTest, ReverseIterator) { |
| 1234 | static constexpr int kArray[] = {1, 6, 1, 8, 0}; |
| 1235 | constexpr span<const int> span(kArray); |
| 1236 | |
Wyatt Hepler | 83d4248 | 2019-11-19 15:17:33 -0800 | [diff] [blame] | 1237 | EXPECT_TRUE(std::equal( |
| 1238 | std::rbegin(kArray), std::rend(kArray), span.rbegin(), span.rend())); |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 1239 | EXPECT_TRUE(std::equal(std::crbegin(kArray), |
| 1240 | std::crend(kArray), |
| 1241 | std::crbegin(span), |
| 1242 | std::crend(span))); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1243 | } |
| 1244 | |
| 1245 | // Pigweed: These are tests for make_span, which is not included in Pigweed's |
| 1246 | // implementation, since class template deduction is available. |
| 1247 | #if 0 |
| 1248 | TEST(SpanTest, AsBytes) { |
| 1249 | { |
| 1250 | constexpr int kArray[] = {2, 3, 5, 7, 11, 13}; |
| 1251 | span<const uint8_t, sizeof(kArray)> bytes_span = |
| 1252 | as_bytes(make_span(kArray)); |
| 1253 | EXPECT_EQ(reinterpret_cast<const uint8_t*>(kArray), bytes_span.data()); |
| 1254 | EXPECT_EQ(sizeof(kArray), bytes_span.size()); |
| 1255 | EXPECT_EQ(bytes_span.size(), bytes_span.size_bytes()); |
| 1256 | } |
| 1257 | |
| 1258 | { |
| 1259 | std::vector<int> vec = {1, 1, 2, 3, 5, 8}; |
| 1260 | span<int> mutable_span(vec); |
| 1261 | span<const uint8_t> bytes_span = as_bytes(mutable_span); |
| 1262 | EXPECT_EQ(reinterpret_cast<const uint8_t*>(vec.data()), bytes_span.data()); |
| 1263 | EXPECT_EQ(sizeof(int) * vec.size(), bytes_span.size()); |
| 1264 | EXPECT_EQ(bytes_span.size(), bytes_span.size_bytes()); |
| 1265 | } |
| 1266 | } |
| 1267 | |
| 1268 | TEST(SpanTest, AsWritableBytes) { |
| 1269 | std::vector<int> vec = {1, 1, 2, 3, 5, 8}; |
| 1270 | span<int> mutable_span(vec); |
| 1271 | span<uint8_t> writable_bytes_span = as_writable_bytes(mutable_span); |
| 1272 | EXPECT_EQ(reinterpret_cast<uint8_t*>(vec.data()), writable_bytes_span.data()); |
| 1273 | EXPECT_EQ(sizeof(int) * vec.size(), writable_bytes_span.size()); |
| 1274 | EXPECT_EQ(writable_bytes_span.size(), writable_bytes_span.size_bytes()); |
| 1275 | |
| 1276 | // Set the first entry of vec to zero while writing through the span. |
| 1277 | std::fill(writable_bytes_span.data(), |
| 1278 | writable_bytes_span.data() + sizeof(int), 0); |
| 1279 | EXPECT_EQ(0, vec[0]); |
| 1280 | } |
| 1281 | |
| 1282 | TEST(SpanTest, MakeSpanFromDataAndSize) { |
| 1283 | int* nullint = nullptr; |
| 1284 | auto empty_span = make_span(nullint, 0); |
| 1285 | EXPECT_TRUE(empty_span.empty()); |
| 1286 | EXPECT_EQ(nullptr, empty_span.data()); |
| 1287 | |
| 1288 | std::vector<int> vector = {1, 1, 2, 3, 5, 8}; |
| 1289 | span<int> expected_span(vector.data(), vector.size()); |
| 1290 | auto made_span = make_span(vector.data(), vector.size()); |
| 1291 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1292 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1293 | static_assert(decltype(made_span)::extent == dynamic_extent, ""); |
| 1294 | static_assert( |
| 1295 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1296 | "the type of made_span differs from expected_span!"); |
| 1297 | } |
| 1298 | |
| 1299 | TEST(SpanTest, MakeSpanFromPointerPair) { |
| 1300 | int* nullint = nullptr; |
| 1301 | auto empty_span = make_span(nullint, nullint); |
| 1302 | EXPECT_TRUE(empty_span.empty()); |
| 1303 | EXPECT_EQ(nullptr, empty_span.data()); |
| 1304 | |
| 1305 | std::vector<int> vector = {1, 1, 2, 3, 5, 8}; |
| 1306 | span<int> expected_span(vector.data(), vector.size()); |
| 1307 | auto made_span = make_span(vector.data(), vector.data() + vector.size()); |
| 1308 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1309 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1310 | static_assert(decltype(made_span)::extent == dynamic_extent, ""); |
| 1311 | static_assert( |
| 1312 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1313 | "the type of made_span differs from expected_span!"); |
| 1314 | } |
| 1315 | |
| 1316 | TEST(SpanTest, MakeSpanFromConstexprArray) { |
| 1317 | static constexpr int kArray[] = {1, 2, 3, 4, 5}; |
| 1318 | constexpr span<const int, 5> expected_span(kArray); |
| 1319 | constexpr auto made_span = make_span(kArray); |
| 1320 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1321 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1322 | static_assert(decltype(made_span)::extent == 5, ""); |
| 1323 | static_assert( |
| 1324 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1325 | "the type of made_span differs from expected_span!"); |
| 1326 | } |
| 1327 | |
| 1328 | TEST(SpanTest, MakeSpanFromStdArray) { |
| 1329 | const std::array<int, 5> kArray = {{1, 2, 3, 4, 5}}; |
| 1330 | span<const int, 5> expected_span(kArray); |
| 1331 | auto made_span = make_span(kArray); |
| 1332 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1333 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1334 | static_assert(decltype(made_span)::extent == 5, ""); |
| 1335 | static_assert( |
| 1336 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1337 | "the type of made_span differs from expected_span!"); |
| 1338 | } |
| 1339 | |
| 1340 | TEST(SpanTest, MakeSpanFromConstContainer) { |
| 1341 | const std::vector<int> vector = {-1, -2, -3, -4, -5}; |
| 1342 | span<const int> expected_span(vector); |
| 1343 | auto made_span = make_span(vector); |
| 1344 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1345 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1346 | static_assert(decltype(made_span)::extent == dynamic_extent, ""); |
| 1347 | static_assert( |
| 1348 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1349 | "the type of made_span differs from expected_span!"); |
| 1350 | } |
| 1351 | |
| 1352 | TEST(SpanTest, MakeStaticSpanFromConstContainer) { |
| 1353 | const std::vector<int> vector = {-1, -2, -3, -4, -5}; |
| 1354 | span<const int, 5> expected_span(vector.data(), vector.size()); |
| 1355 | auto made_span = make_span<5>(vector); |
| 1356 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1357 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1358 | static_assert(decltype(made_span)::extent == 5, ""); |
| 1359 | static_assert( |
| 1360 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1361 | "the type of made_span differs from expected_span!"); |
| 1362 | } |
| 1363 | |
| 1364 | TEST(SpanTest, MakeSpanFromContainer) { |
| 1365 | std::vector<int> vector = {-1, -2, -3, -4, -5}; |
| 1366 | span<int> expected_span(vector); |
| 1367 | auto made_span = make_span(vector); |
| 1368 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1369 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1370 | static_assert(decltype(made_span)::extent == dynamic_extent, ""); |
| 1371 | static_assert( |
| 1372 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1373 | "the type of made_span differs from expected_span!"); |
| 1374 | } |
| 1375 | |
| 1376 | TEST(SpanTest, MakeStaticSpanFromContainer) { |
| 1377 | std::vector<int> vector = {-1, -2, -3, -4, -5}; |
| 1378 | span<int, 5> expected_span(vector.data(), vector.size()); |
| 1379 | auto made_span = make_span<5>(vector); |
| 1380 | EXPECT_EQ(expected_span.data(), make_span<5>(vector).data()); |
| 1381 | EXPECT_EQ(expected_span.size(), make_span<5>(vector).size()); |
| 1382 | static_assert(decltype(make_span<5>(vector))::extent == 5, ""); |
| 1383 | static_assert( |
| 1384 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1385 | "the type of made_span differs from expected_span!"); |
| 1386 | } |
| 1387 | |
| 1388 | TEST(SpanTest, MakeStaticSpanFromConstexprContainer) { |
| 1389 | constexpr StringPiece str = "Hello, World"; |
| 1390 | constexpr auto made_span = make_span<12>(str); |
| 1391 | static_assert(str.data() == made_span.data(), "Error: data() does not match"); |
| 1392 | static_assert(str.size() == made_span.size(), "Error: size() does not match"); |
| 1393 | static_assert(std::is_same<decltype(str)::value_type, |
| 1394 | decltype(made_span)::value_type>::value, |
| 1395 | "Error: value_type does not match"); |
| 1396 | static_assert(str.size() == decltype(made_span)::extent, |
| 1397 | "Error: extent does not match"); |
| 1398 | } |
| 1399 | |
| 1400 | TEST(SpanTest, MakeSpanFromRValueContainer) { |
| 1401 | std::vector<int> vector = {-1, -2, -3, -4, -5}; |
| 1402 | span<const int> expected_span(vector); |
| 1403 | // Note: While static_cast<T&&>(foo) is effectively just a fancy spelling of |
| 1404 | // std::move(foo), make_span does not actually take ownership of the passed in |
| 1405 | // container. Writing it this way makes it more obvious that we simply care |
| 1406 | // about the right behavour when passing rvalues. |
| 1407 | auto made_span = make_span(static_cast<std::vector<int>&&>(vector)); |
| 1408 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1409 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1410 | static_assert(decltype(made_span)::extent == dynamic_extent, ""); |
| 1411 | static_assert( |
| 1412 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1413 | "the type of made_span differs from expected_span!"); |
| 1414 | } |
| 1415 | |
| 1416 | TEST(SpanTest, MakeStaticSpanFromRValueContainer) { |
| 1417 | std::vector<int> vector = {-1, -2, -3, -4, -5}; |
| 1418 | span<const int, 5> expected_span(vector.data(), vector.size()); |
| 1419 | // Note: While static_cast<T&&>(foo) is effectively just a fancy spelling of |
| 1420 | // std::move(foo), make_span does not actually take ownership of the passed in |
| 1421 | // container. Writing it this way makes it more obvious that we simply care |
| 1422 | // about the right behavour when passing rvalues. |
| 1423 | auto made_span = make_span<5>(static_cast<std::vector<int>&&>(vector)); |
| 1424 | EXPECT_EQ(expected_span.data(), made_span.data()); |
| 1425 | EXPECT_EQ(expected_span.size(), made_span.size()); |
| 1426 | static_assert(decltype(made_span)::extent == 5, ""); |
| 1427 | static_assert( |
| 1428 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1429 | "the type of made_span differs from expected_span!"); |
| 1430 | } |
| 1431 | |
| 1432 | TEST(SpanTest, MakeSpanFromDynamicSpan) { |
| 1433 | static constexpr int kArray[] = {1, 2, 3, 4, 5}; |
| 1434 | constexpr span<const int> expected_span(kArray); |
| 1435 | constexpr auto made_span = make_span(expected_span); |
| 1436 | static_assert(std::is_same<decltype(expected_span)::element_type, |
| 1437 | decltype(made_span)::element_type>::value, |
| 1438 | "make_span(span) should have the same element_type as span"); |
| 1439 | |
| 1440 | static_assert(expected_span.data() == made_span.data(), |
| 1441 | "make_span(span) should have the same data() as span"); |
| 1442 | |
| 1443 | static_assert(expected_span.size() == made_span.size(), |
| 1444 | "make_span(span) should have the same size() as span"); |
| 1445 | |
| 1446 | static_assert(decltype(made_span)::extent == decltype(expected_span)::extent, |
| 1447 | "make_span(span) should have the same extent as span"); |
| 1448 | |
| 1449 | static_assert( |
| 1450 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1451 | "the type of made_span differs from expected_span!"); |
| 1452 | } |
| 1453 | |
| 1454 | TEST(SpanTest, MakeSpanFromStaticSpan) { |
| 1455 | static constexpr int kArray[] = {1, 2, 3, 4, 5}; |
| 1456 | constexpr span<const int, 5> expected_span(kArray); |
| 1457 | constexpr auto made_span = make_span(expected_span); |
| 1458 | static_assert(std::is_same<decltype(expected_span)::element_type, |
| 1459 | decltype(made_span)::element_type>::value, |
| 1460 | "make_span(span) should have the same element_type as span"); |
| 1461 | |
| 1462 | static_assert(expected_span.data() == made_span.data(), |
| 1463 | "make_span(span) should have the same data() as span"); |
| 1464 | |
| 1465 | static_assert(expected_span.size() == made_span.size(), |
| 1466 | "make_span(span) should have the same size() as span"); |
| 1467 | |
| 1468 | static_assert(decltype(made_span)::extent == decltype(expected_span)::extent, |
| 1469 | "make_span(span) should have the same extent as span"); |
| 1470 | |
| 1471 | static_assert( |
| 1472 | std::is_same<decltype(expected_span), decltype(made_span)>::value, |
| 1473 | "the type of made_span differs from expected_span!"); |
| 1474 | } |
| 1475 | #endif // 0 |
| 1476 | |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1477 | TEST(SpanTest, EnsureConstexprGoodness) { |
| 1478 | static constexpr int kArray[] = {5, 4, 3, 2, 1}; |
| 1479 | constexpr span<const int> constexpr_span(kArray); |
| 1480 | const size_t size = 2; |
| 1481 | |
| 1482 | const size_t start = 1; |
| 1483 | constexpr span<const int> subspan = |
| 1484 | constexpr_span.subspan(start, start + size); |
| 1485 | for (size_t i = 0; i < subspan.size(); ++i) |
| 1486 | EXPECT_EQ(kArray[start + i], subspan[i]); |
| 1487 | |
| 1488 | constexpr span<const int> firsts = constexpr_span.first(size); |
| 1489 | for (size_t i = 0; i < firsts.size(); ++i) |
| 1490 | EXPECT_EQ(kArray[i], firsts[i]); |
| 1491 | |
| 1492 | constexpr span<const int> lasts = constexpr_span.last(size); |
| 1493 | for (size_t i = 0; i < lasts.size(); ++i) { |
| 1494 | const size_t j = (std::size(kArray) - size) + i; |
| 1495 | EXPECT_EQ(kArray[j], lasts[i]); |
| 1496 | } |
| 1497 | |
| 1498 | constexpr int item = constexpr_span[size]; |
| 1499 | EXPECT_EQ(kArray[size], item); |
| 1500 | } |
| 1501 | |
| 1502 | #if 0 |
| 1503 | |
| 1504 | // Pigweed: Death tests are not yet supported. |
| 1505 | TEST(SpanTest, OutOfBoundsDeath) { |
| 1506 | constexpr span<int, 0> kEmptySpan; |
| 1507 | ASSERT_DEATH_IF_SUPPORTED(kEmptySpan[0], ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1508 | ASSERT_DEATH_IF_SUPPORTED(kEmptySpan.first(1), ""); |
| 1509 | ASSERT_DEATH_IF_SUPPORTED(kEmptySpan.last(1), ""); |
| 1510 | ASSERT_DEATH_IF_SUPPORTED(kEmptySpan.subspan(1), ""); |
| 1511 | |
| 1512 | constexpr span<int> kEmptyDynamicSpan; |
| 1513 | ASSERT_DEATH_IF_SUPPORTED(kEmptyDynamicSpan[0], ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1514 | ASSERT_DEATH_IF_SUPPORTED(kEmptyDynamicSpan.front(), ""); |
| 1515 | ASSERT_DEATH_IF_SUPPORTED(kEmptyDynamicSpan.first(1), ""); |
| 1516 | ASSERT_DEATH_IF_SUPPORTED(kEmptyDynamicSpan.last(1), ""); |
| 1517 | ASSERT_DEATH_IF_SUPPORTED(kEmptyDynamicSpan.back(), ""); |
| 1518 | ASSERT_DEATH_IF_SUPPORTED(kEmptyDynamicSpan.subspan(1), ""); |
| 1519 | |
| 1520 | static constexpr int kArray[] = {0, 1, 2}; |
| 1521 | constexpr span<const int> kNonEmptyDynamicSpan(kArray); |
| 1522 | EXPECT_EQ(3U, kNonEmptyDynamicSpan.size()); |
| 1523 | ASSERT_DEATH_IF_SUPPORTED(kNonEmptyDynamicSpan[4], ""); |
Wyatt Hepler | 64c165e | 2020-01-13 10:21:08 -0800 | [diff] [blame] | 1524 | ASSERT_DEATH_IF_SUPPORTED(kNonEmptyDynamicSpan.subspan(10), ""); |
| 1525 | ASSERT_DEATH_IF_SUPPORTED(kNonEmptyDynamicSpan.subspan(1, 7), ""); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1526 | } |
| 1527 | |
| 1528 | // Pigweed: These tests use CheckedContiguousConstIterator, which isn't used in |
| 1529 | // Pigweed's version. |
| 1530 | TEST(SpanTest, IteratorIsRangeMoveSafe) { |
| 1531 | static constexpr int kArray[] = {1, 6, 1, 8, 0}; |
| 1532 | const size_t kNumElements = 5; |
| 1533 | constexpr span<const int> span(kArray); |
| 1534 | |
| 1535 | static constexpr int kOverlappingStartIndexes[] = {-4, 0, 3, 4}; |
| 1536 | static constexpr int kNonOverlappingStartIndexes[] = {-7, -5, 5, 7}; |
| 1537 | |
| 1538 | // Overlapping ranges. |
| 1539 | for (const int dest_start_index : kOverlappingStartIndexes) { |
| 1540 | EXPECT_FALSE(CheckedContiguousIterator<const int>::IsRangeMoveSafe( |
| 1541 | span.begin(), span.end(), |
| 1542 | CheckedContiguousIterator<const int>( |
| 1543 | span.data() + dest_start_index, |
| 1544 | span.data() + dest_start_index + kNumElements))); |
| 1545 | EXPECT_FALSE(CheckedContiguousConstIterator<const int>::IsRangeMoveSafe( |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 1546 | std::cbegin(span), std::cend(span), |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1547 | CheckedContiguousConstIterator<const int>( |
| 1548 | span.data() + dest_start_index, |
| 1549 | span.data() + dest_start_index + kNumElements))); |
| 1550 | } |
| 1551 | |
| 1552 | // Non-overlapping ranges. |
| 1553 | for (const int dest_start_index : kNonOverlappingStartIndexes) { |
| 1554 | EXPECT_TRUE(CheckedContiguousIterator<const int>::IsRangeMoveSafe( |
| 1555 | span.begin(), span.end(), |
| 1556 | CheckedContiguousIterator<const int>( |
| 1557 | span.data() + dest_start_index, |
| 1558 | span.data() + dest_start_index + kNumElements))); |
| 1559 | EXPECT_TRUE(CheckedContiguousConstIterator<const int>::IsRangeMoveSafe( |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 1560 | std::cbegin(span), std::cend(span), |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1561 | CheckedContiguousConstIterator<const int>( |
| 1562 | span.data() + dest_start_index, |
| 1563 | span.data() + dest_start_index + kNumElements))); |
| 1564 | } |
| 1565 | |
| 1566 | // IsRangeMoveSafe is true if the length to be moved is 0. |
| 1567 | EXPECT_TRUE(CheckedContiguousIterator<const int>::IsRangeMoveSafe( |
| 1568 | span.begin(), span.begin(), |
| 1569 | CheckedContiguousIterator<const int>(span.data(), span.data()))); |
| 1570 | EXPECT_TRUE(CheckedContiguousConstIterator<const int>::IsRangeMoveSafe( |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 1571 | std::cbegin(span), std::cbegin(span), |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1572 | CheckedContiguousConstIterator<const int>(span.data(), span.data()))); |
| 1573 | |
| 1574 | // IsRangeMoveSafe is false if end < begin. |
| 1575 | EXPECT_FALSE(CheckedContiguousIterator<const int>::IsRangeMoveSafe( |
| 1576 | span.end(), span.begin(), |
| 1577 | CheckedContiguousIterator<const int>(span.data(), span.data()))); |
| 1578 | EXPECT_FALSE(CheckedContiguousConstIterator<const int>::IsRangeMoveSafe( |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 1579 | std::cend(span), std::cbegin(span), |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1580 | CheckedContiguousConstIterator<const int>(span.data(), span.data()))); |
| 1581 | } |
| 1582 | |
| 1583 | // Pigweed: gMock matchers are not yet supported. |
| 1584 | TEST(SpanTest, Sort) { |
| 1585 | int array[] = {5, 4, 3, 2, 1}; |
| 1586 | |
| 1587 | span<int> dynamic_span = array; |
| 1588 | std::sort(dynamic_span.begin(), dynamic_span.end()); |
| 1589 | EXPECT_THAT(array, ElementsAre(1, 2, 3, 4, 5)); |
| 1590 | std::sort(dynamic_span.rbegin(), dynamic_span.rend()); |
| 1591 | EXPECT_THAT(array, ElementsAre(5, 4, 3, 2, 1)); |
| 1592 | |
| 1593 | span<int, 5> static_span = array; |
| 1594 | std::sort(static_span.rbegin(), static_span.rend(), std::greater<>()); |
| 1595 | EXPECT_THAT(array, ElementsAre(1, 2, 3, 4, 5)); |
| 1596 | std::sort(static_span.begin(), static_span.end(), std::greater<>()); |
| 1597 | EXPECT_THAT(array, ElementsAre(5, 4, 3, 2, 1)); |
| 1598 | } |
| 1599 | #endif // 0 |
| 1600 | |
| 1601 | TEST(SpanTest, SpanExtentConversions) { |
| 1602 | // Statically checks that various conversions between spans of dynamic and |
| 1603 | // static extent are possible or not. |
| 1604 | static_assert( |
| 1605 | !std::is_constructible<span<int, 0>, span<int>>::value, |
| 1606 | "Error: static span should not be constructible from dynamic span"); |
| 1607 | |
| 1608 | static_assert(!std::is_constructible<span<int, 2>, span<int, 1>>::value, |
| 1609 | "Error: static span should not be constructible from static " |
| 1610 | "span with different extent"); |
| 1611 | |
| 1612 | static_assert(std::is_convertible<span<int, 0>, span<int>>::value, |
| 1613 | "Error: static span should be convertible to dynamic span"); |
| 1614 | |
| 1615 | static_assert(std::is_convertible<span<int>, span<int>>::value, |
| 1616 | "Error: dynamic span should be convertible to dynamic span"); |
| 1617 | |
| 1618 | static_assert(std::is_convertible<span<int, 2>, span<int, 2>>::value, |
| 1619 | "Error: static span should be convertible to static span"); |
| 1620 | } |
| 1621 | |
| 1622 | TEST(SpanTest, IteratorConversions) { |
| 1623 | static_assert(std::is_convertible<span<int>::iterator, |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 1624 | span<const int>::iterator>::value, |
| 1625 | "Error: iterator should be convertible to const iterator"); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1626 | |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 1627 | static_assert(!std::is_convertible<span<const int>::iterator, |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1628 | span<int>::iterator>::value, |
Wyatt Hepler | 3a3ec58 | 2020-03-13 10:05:12 -0700 | [diff] [blame] | 1629 | "Error: const iterator should not be convertible to iterator"); |
Wyatt Hepler | 7710565 | 2019-11-06 17:50:03 -0800 | [diff] [blame] | 1630 | } |
| 1631 | |
Wyatt Hepler | 69a5190 | 2020-06-22 10:42:53 -0700 | [diff] [blame] | 1632 | } // namespace std |