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