| // Copyright 2020 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| |
| #include <array> |
| |
| #include "gtest/gtest.h" |
| #include "pw_polyfill/language_feature_macros.h" |
| #include "pw_polyfill/standard.h" |
| #include "pw_polyfill/standard_library/bit.h" |
| #include "pw_polyfill/standard_library/cstddef.h" |
| #include "pw_polyfill/standard_library/iterator.h" |
| #include "pw_polyfill/standard_library/type_traits.h" |
| #include "pw_polyfill/standard_library/utility.h" |
| |
| namespace pw { |
| namespace polyfill { |
| namespace { |
| |
| PW_INLINE_VARIABLE constexpr int foo = 42; |
| |
| static_assert(foo == 42, "Error!"); |
| |
| static_assert(PW_CXX_STANDARD_IS_SUPPORTED(98), "C++98 must be supported"); |
| static_assert(PW_CXX_STANDARD_IS_SUPPORTED(11), "C++11 must be supported"); |
| |
| #if __cplusplus >= 201402L |
| static_assert(PW_CXX_STANDARD_IS_SUPPORTED(14), "C++14 must be not supported"); |
| #else |
| static_assert(!PW_CXX_STANDARD_IS_SUPPORTED(14), "C++14 must be supported"); |
| #endif // __cplusplus >= 201402L |
| |
| #if __cplusplus >= 201703L |
| static_assert(PW_CXX_STANDARD_IS_SUPPORTED(17), "C++17 must be not supported"); |
| #else |
| static_assert(!PW_CXX_STANDARD_IS_SUPPORTED(17), "C++17 must be supported"); |
| #endif // __cplusplus >= 201703L |
| |
| TEST(Array, ToArray_StringLiteral) { |
| std::array<char, sizeof("literally!")> array = std::to_array("literally!"); |
| EXPECT_TRUE(std::strcmp(array.data(), "literally!") == 0); |
| } |
| |
| TEST(Array, ToArray_Inline) { |
| constexpr std::array<int, 3> kArray = std::to_array({1, 2, 3}); |
| static_assert(kArray.size() == 3); |
| EXPECT_TRUE(kArray[0] == 1); |
| } |
| |
| TEST(Array, ToArray_Array) { |
| char c_array[] = "array!"; |
| std::array<char, sizeof("array!")> array = std::to_array(c_array); |
| EXPECT_TRUE(std::strcmp(array.data(), "array!") == 0); |
| } |
| |
| struct MoveOnly { |
| MoveOnly(char ch) : value(ch) {} |
| |
| MoveOnly(const MoveOnly&) = delete; |
| MoveOnly& operator=(const MoveOnly&) = delete; |
| |
| MoveOnly(MoveOnly&&) = default; |
| MoveOnly& operator=(MoveOnly&&) = default; |
| |
| char value; |
| }; |
| |
| TEST(Array, ToArray_MoveOnly) { |
| MoveOnly c_array[]{MoveOnly('a'), MoveOnly('b')}; |
| std::array<MoveOnly, 2> array = std::to_array(std::move(c_array)); |
| EXPECT_TRUE(array[0].value == 'a'); |
| EXPECT_TRUE(array[1].value == 'b'); |
| } |
| |
| TEST(Bit, Endian) { |
| if (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) { |
| EXPECT_TRUE(std::endian::native == std::endian::big); |
| } else if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) { |
| EXPECT_TRUE(std::endian::native == std::endian::little); |
| } else { |
| FAIL(); |
| } |
| } |
| |
| TEST(Cstddef, Byte_Operators) { |
| std::byte value = std::byte(0); |
| EXPECT_TRUE((value | std::byte(0x12)) == std::byte(0x12)); |
| EXPECT_TRUE((value & std::byte(0x12)) == std::byte(0)); |
| EXPECT_TRUE((value ^ std::byte(0x12)) == std::byte(0x12)); |
| EXPECT_TRUE(~std::byte(0) == std::byte(-1)); |
| EXPECT_TRUE((std::byte(1) << 3) == std::byte(0x8)); |
| EXPECT_TRUE((std::byte(0x8) >> 3) == std::byte(1)); |
| } |
| |
| TEST(Cstddef, Byte_AssignmentOperators) { |
| std::byte value = std::byte(0); |
| EXPECT_TRUE((value |= std::byte(0x12)) == std::byte(0x12)); |
| EXPECT_TRUE((value &= std::byte(0x0F)) == std::byte(0x02)); |
| EXPECT_TRUE((value ^= std::byte(0xFF)) == std::byte(0xFD)); |
| EXPECT_TRUE((value <<= 4) == std::byte(0xD0)); |
| EXPECT_TRUE((value >>= 5) == std::byte(0x6)); |
| } |
| |
| // Check that consteval is at least equivalent to constexpr. |
| consteval int ConstevalFunction() { return 123; } |
| static_assert(ConstevalFunction() == 123); |
| |
| int c_array[5423] = {}; |
| std::array<int, 32> array; |
| |
| TEST(Iterator, Size) { |
| EXPECT_TRUE(std::size(c_array) == sizeof(c_array) / sizeof(*c_array)); |
| EXPECT_TRUE(std::size(array) == array.size()); |
| } |
| |
| TEST(Iterator, Data) { |
| EXPECT_TRUE(std::data(c_array) == c_array); |
| EXPECT_TRUE(std::data(array) == array.data()); |
| } |
| |
| constinit bool mutable_value = true; |
| |
| TEST(Constinit, ValueIsMutable) { |
| ASSERT_TRUE(mutable_value); |
| mutable_value = false; |
| ASSERT_FALSE(mutable_value); |
| mutable_value = true; |
| } |
| |
| TEST(TypeTraits, Aliases) { |
| static_assert( |
| std::is_same<std::aligned_storage_t<40, 40>, |
| typename std::aligned_storage<40, 40>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert(std::is_same<std::common_type_t<int, bool>, |
| typename std::common_type<int, bool>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert( |
| std::is_same<std::conditional_t<false, int, char>, |
| typename std::conditional<false, int, char>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert( |
| std::is_same<std::decay_t<int>, typename std::decay<int>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert(std::is_same<std::enable_if_t<true, int>, |
| typename std::enable_if<true, int>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert(std::is_same<std::make_signed_t<int>, |
| typename std::make_signed<int>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert(std::is_same<std::make_unsigned_t<int>, |
| typename std::make_unsigned<int>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert(std::is_same<std::remove_cv_t<int>, |
| typename std::remove_cv<int>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert(std::is_same<std::remove_pointer_t<int>, |
| typename std::remove_pointer<int>::type>::value, |
| "Alias must be defined"); |
| |
| static_assert(std::is_same<std::remove_reference_t<int>, |
| typename std::remove_reference<int>::type>::value, |
| "Alias must be defined"); |
| } |
| |
| TEST(Utility, IntegerSequence) { |
| static_assert(std::integer_sequence<int>::size() == 0); |
| static_assert(std::integer_sequence<int, 9, 8, 7>::size() == 3); |
| static_assert(std::make_index_sequence<1>::size() == 1); |
| static_assert(std::make_index_sequence<123>::size() == 123); |
| } |
| |
| } // namespace |
| } // namespace polyfill |
| } // namespace pw |