diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/types/span_test.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/types/span_test.cc | 846 |
1 files changed, 0 insertions, 846 deletions
diff --git a/third_party/abseil_cpp/absl/types/span_test.cc b/third_party/abseil_cpp/absl/types/span_test.cc deleted file mode 100644 index 2584339bd3..0000000000 --- a/third_party/abseil_cpp/absl/types/span_test.cc +++ /dev/null @@ -1,846 +0,0 @@ -// Copyright 2017 The Abseil 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 "absl/types/span.h" - -#include <array> -#include <initializer_list> -#include <numeric> -#include <stdexcept> -#include <string> -#include <type_traits> -#include <vector> - -#include "gmock/gmock.h" -#include "gtest/gtest.h" -#include "absl/base/attributes.h" -#include "absl/base/config.h" -#include "absl/base/internal/exception_testing.h" -#include "absl/base/options.h" -#include "absl/container/fixed_array.h" -#include "absl/container/inlined_vector.h" -#include "absl/hash/hash_testing.h" -#include "absl/strings/str_cat.h" - -namespace { - -MATCHER_P(DataIs, data, - absl::StrCat("data() ", negation ? "isn't " : "is ", - testing::PrintToString(data))) { - return arg.data() == data; -} - -template <typename T> -auto SpanIs(T data, size_t size) - -> decltype(testing::AllOf(DataIs(data), testing::SizeIs(size))) { - return testing::AllOf(DataIs(data), testing::SizeIs(size)); -} - -template <typename Container> -auto SpanIs(const Container& c) -> decltype(SpanIs(c.data(), c.size())) { - return SpanIs(c.data(), c.size()); -} - -std::vector<int> MakeRamp(int len, int offset = 0) { - std::vector<int> v(len); - std::iota(v.begin(), v.end(), offset); - return v; -} - -TEST(IntSpan, EmptyCtors) { - absl::Span<int> s; - EXPECT_THAT(s, SpanIs(nullptr, 0)); -} - -TEST(IntSpan, PtrLenCtor) { - int a[] = {1, 2, 3}; - absl::Span<int> s(&a[0], 2); - EXPECT_THAT(s, SpanIs(a, 2)); -} - -TEST(IntSpan, ArrayCtor) { - int a[] = {1, 2, 3}; - absl::Span<int> s(a); - EXPECT_THAT(s, SpanIs(a, 3)); - - EXPECT_TRUE((std::is_constructible<absl::Span<const int>, int[3]>::value)); - EXPECT_TRUE( - (std::is_constructible<absl::Span<const int>, const int[3]>::value)); - EXPECT_FALSE((std::is_constructible<absl::Span<int>, const int[3]>::value)); - EXPECT_TRUE((std::is_convertible<int[3], absl::Span<const int>>::value)); - EXPECT_TRUE( - (std::is_convertible<const int[3], absl::Span<const int>>::value)); -} - -template <typename T> -void TakesGenericSpan(absl::Span<T>) {} - -TEST(IntSpan, ContainerCtor) { - std::vector<int> empty; - absl::Span<int> s_empty(empty); - EXPECT_THAT(s_empty, SpanIs(empty)); - - std::vector<int> filled{1, 2, 3}; - absl::Span<int> s_filled(filled); - EXPECT_THAT(s_filled, SpanIs(filled)); - - absl::Span<int> s_from_span(filled); - EXPECT_THAT(s_from_span, SpanIs(s_filled)); - - absl::Span<const int> const_filled = filled; - EXPECT_THAT(const_filled, SpanIs(filled)); - - absl::Span<const int> const_from_span = s_filled; - EXPECT_THAT(const_from_span, SpanIs(s_filled)); - - EXPECT_TRUE( - (std::is_convertible<std::vector<int>&, absl::Span<const int>>::value)); - EXPECT_TRUE( - (std::is_convertible<absl::Span<int>&, absl::Span<const int>>::value)); - - TakesGenericSpan(absl::Span<int>(filled)); -} - -// A struct supplying shallow data() const. -struct ContainerWithShallowConstData { - std::vector<int> storage; - int* data() const { return const_cast<int*>(storage.data()); } - int size() const { return storage.size(); } -}; - -TEST(IntSpan, ShallowConstness) { - const ContainerWithShallowConstData c{MakeRamp(20)}; - absl::Span<int> s( - c); // We should be able to do this even though data() is const. - s[0] = -1; - EXPECT_EQ(c.storage[0], -1); -} - -TEST(CharSpan, StringCtor) { - std::string empty = ""; - absl::Span<char> s_empty(empty); - EXPECT_THAT(s_empty, SpanIs(empty)); - - std::string abc = "abc"; - absl::Span<char> s_abc(abc); - EXPECT_THAT(s_abc, SpanIs(abc)); - - absl::Span<const char> s_const_abc = abc; - EXPECT_THAT(s_const_abc, SpanIs(abc)); - - EXPECT_FALSE((std::is_constructible<absl::Span<int>, std::string>::value)); - EXPECT_FALSE( - (std::is_constructible<absl::Span<const int>, std::string>::value)); - EXPECT_TRUE( - (std::is_convertible<std::string, absl::Span<const char>>::value)); -} - -TEST(IntSpan, FromConstPointer) { - EXPECT_TRUE((std::is_constructible<absl::Span<const int* const>, - std::vector<int*>>::value)); - EXPECT_TRUE((std::is_constructible<absl::Span<const int* const>, - std::vector<const int*>>::value)); - EXPECT_FALSE(( - std::is_constructible<absl::Span<const int*>, std::vector<int*>>::value)); - EXPECT_FALSE(( - std::is_constructible<absl::Span<int*>, std::vector<const int*>>::value)); -} - -struct TypeWithMisleadingData { - int& data() { return i; } - int size() { return 1; } - int i; -}; - -struct TypeWithMisleadingSize { - int* data() { return &i; } - const char* size() { return "1"; } - int i; -}; - -TEST(IntSpan, EvilTypes) { - EXPECT_FALSE( - (std::is_constructible<absl::Span<int>, TypeWithMisleadingData&>::value)); - EXPECT_FALSE( - (std::is_constructible<absl::Span<int>, TypeWithMisleadingSize&>::value)); -} - -struct Base { - int* data() { return &i; } - int size() { return 1; } - int i; -}; -struct Derived : Base {}; - -TEST(IntSpan, SpanOfDerived) { - EXPECT_TRUE((std::is_constructible<absl::Span<int>, Base&>::value)); - EXPECT_TRUE((std::is_constructible<absl::Span<int>, Derived&>::value)); - EXPECT_FALSE( - (std::is_constructible<absl::Span<Base>, std::vector<Derived>>::value)); -} - -void TestInitializerList(absl::Span<const int> s, const std::vector<int>& v) { - EXPECT_TRUE(absl::equal(s.begin(), s.end(), v.begin(), v.end())); -} - -TEST(ConstIntSpan, InitializerListConversion) { - TestInitializerList({}, {}); - TestInitializerList({1}, {1}); - TestInitializerList({1, 2, 3}, {1, 2, 3}); - - EXPECT_FALSE((std::is_constructible<absl::Span<int>, - std::initializer_list<int>>::value)); - EXPECT_FALSE(( - std::is_convertible<absl::Span<int>, std::initializer_list<int>>::value)); -} - -TEST(IntSpan, Data) { - int i; - absl::Span<int> s(&i, 1); - EXPECT_EQ(&i, s.data()); -} - -TEST(IntSpan, SizeLengthEmpty) { - absl::Span<int> empty; - EXPECT_EQ(empty.size(), 0); - EXPECT_TRUE(empty.empty()); - EXPECT_EQ(empty.size(), empty.length()); - - auto v = MakeRamp(10); - absl::Span<int> s(v); - EXPECT_EQ(s.size(), 10); - EXPECT_FALSE(s.empty()); - EXPECT_EQ(s.size(), s.length()); -} - -TEST(IntSpan, ElementAccess) { - auto v = MakeRamp(10); - absl::Span<int> s(v); - for (int i = 0; i < s.size(); ++i) { - EXPECT_EQ(s[i], s.at(i)); - } - - EXPECT_EQ(s.front(), s[0]); - EXPECT_EQ(s.back(), s[9]); - -#if !defined(NDEBUG) || ABSL_OPTION_HARDENED - EXPECT_DEATH_IF_SUPPORTED(s[-1], ""); - EXPECT_DEATH_IF_SUPPORTED(s[10], ""); -#endif -} - -TEST(IntSpan, AtThrows) { - auto v = MakeRamp(10); - absl::Span<int> s(v); - - EXPECT_EQ(s.at(9), 9); - ABSL_BASE_INTERNAL_EXPECT_FAIL(s.at(10), std::out_of_range, - "failed bounds check"); -} - -TEST(IntSpan, RemovePrefixAndSuffix) { - auto v = MakeRamp(20, 1); - absl::Span<int> s(v); - EXPECT_EQ(s.size(), 20); - - s.remove_suffix(0); - s.remove_prefix(0); - EXPECT_EQ(s.size(), 20); - - s.remove_prefix(1); - EXPECT_EQ(s.size(), 19); - EXPECT_EQ(s[0], 2); - - s.remove_suffix(1); - EXPECT_EQ(s.size(), 18); - EXPECT_EQ(s.back(), 19); - - s.remove_prefix(7); - EXPECT_EQ(s.size(), 11); - EXPECT_EQ(s[0], 9); - - s.remove_suffix(11); - EXPECT_EQ(s.size(), 0); - - EXPECT_EQ(v, MakeRamp(20, 1)); - -#if !defined(NDEBUG) || ABSL_OPTION_HARDENED - absl::Span<int> prefix_death(v); - EXPECT_DEATH_IF_SUPPORTED(prefix_death.remove_prefix(21), ""); - absl::Span<int> suffix_death(v); - EXPECT_DEATH_IF_SUPPORTED(suffix_death.remove_suffix(21), ""); -#endif -} - -TEST(IntSpan, Subspan) { - std::vector<int> empty; - EXPECT_EQ(absl::MakeSpan(empty).subspan(), empty); - EXPECT_THAT(absl::MakeSpan(empty).subspan(0, 0), SpanIs(empty)); - EXPECT_THAT(absl::MakeSpan(empty).subspan(0, absl::Span<const int>::npos), - SpanIs(empty)); - - auto ramp = MakeRamp(10); - EXPECT_THAT(absl::MakeSpan(ramp).subspan(), SpanIs(ramp)); - EXPECT_THAT(absl::MakeSpan(ramp).subspan(0, 10), SpanIs(ramp)); - EXPECT_THAT(absl::MakeSpan(ramp).subspan(0, absl::Span<const int>::npos), - SpanIs(ramp)); - EXPECT_THAT(absl::MakeSpan(ramp).subspan(0, 3), SpanIs(ramp.data(), 3)); - EXPECT_THAT(absl::MakeSpan(ramp).subspan(5, absl::Span<const int>::npos), - SpanIs(ramp.data() + 5, 5)); - EXPECT_THAT(absl::MakeSpan(ramp).subspan(3, 3), SpanIs(ramp.data() + 3, 3)); - EXPECT_THAT(absl::MakeSpan(ramp).subspan(10, 5), SpanIs(ramp.data() + 10, 0)); - -#ifdef ABSL_HAVE_EXCEPTIONS - EXPECT_THROW(absl::MakeSpan(ramp).subspan(11, 5), std::out_of_range); -#else - EXPECT_DEATH_IF_SUPPORTED(absl::MakeSpan(ramp).subspan(11, 5), ""); -#endif -} - -TEST(IntSpan, First) { - std::vector<int> empty; - EXPECT_THAT(absl::MakeSpan(empty).first(0), SpanIs(empty)); - - auto ramp = MakeRamp(10); - EXPECT_THAT(absl::MakeSpan(ramp).first(0), SpanIs(ramp.data(), 0)); - EXPECT_THAT(absl::MakeSpan(ramp).first(10), SpanIs(ramp)); - EXPECT_THAT(absl::MakeSpan(ramp).first(3), SpanIs(ramp.data(), 3)); - -#ifdef ABSL_HAVE_EXCEPTIONS - EXPECT_THROW(absl::MakeSpan(ramp).first(11), std::out_of_range); -#else - EXPECT_DEATH_IF_SUPPORTED(absl::MakeSpan(ramp).first(11), ""); -#endif -} - -TEST(IntSpan, Last) { - std::vector<int> empty; - EXPECT_THAT(absl::MakeSpan(empty).last(0), SpanIs(empty)); - - auto ramp = MakeRamp(10); - EXPECT_THAT(absl::MakeSpan(ramp).last(0), SpanIs(ramp.data() + 10, 0)); - EXPECT_THAT(absl::MakeSpan(ramp).last(10), SpanIs(ramp)); - EXPECT_THAT(absl::MakeSpan(ramp).last(3), SpanIs(ramp.data() + 7, 3)); - -#ifdef ABSL_HAVE_EXCEPTIONS - EXPECT_THROW(absl::MakeSpan(ramp).last(11), std::out_of_range); -#else - EXPECT_DEATH_IF_SUPPORTED(absl::MakeSpan(ramp).last(11), ""); -#endif -} - -TEST(IntSpan, MakeSpanPtrLength) { - std::vector<int> empty; - auto s_empty = absl::MakeSpan(empty.data(), empty.size()); - EXPECT_THAT(s_empty, SpanIs(empty)); - - std::array<int, 3> a{{1, 2, 3}}; - auto s = absl::MakeSpan(a.data(), a.size()); - EXPECT_THAT(s, SpanIs(a)); - - EXPECT_THAT(absl::MakeConstSpan(empty.data(), empty.size()), SpanIs(s_empty)); - EXPECT_THAT(absl::MakeConstSpan(a.data(), a.size()), SpanIs(s)); -} - -TEST(IntSpan, MakeSpanTwoPtrs) { - std::vector<int> empty; - auto s_empty = absl::MakeSpan(empty.data(), empty.data()); - EXPECT_THAT(s_empty, SpanIs(empty)); - - std::vector<int> v{1, 2, 3}; - auto s = absl::MakeSpan(v.data(), v.data() + 1); - EXPECT_THAT(s, SpanIs(v.data(), 1)); - - EXPECT_THAT(absl::MakeConstSpan(empty.data(), empty.data()), SpanIs(s_empty)); - EXPECT_THAT(absl::MakeConstSpan(v.data(), v.data() + 1), SpanIs(s)); -} - -TEST(IntSpan, MakeSpanContainer) { - std::vector<int> empty; - auto s_empty = absl::MakeSpan(empty); - EXPECT_THAT(s_empty, SpanIs(empty)); - - std::vector<int> v{1, 2, 3}; - auto s = absl::MakeSpan(v); - EXPECT_THAT(s, SpanIs(v)); - - EXPECT_THAT(absl::MakeConstSpan(empty), SpanIs(s_empty)); - EXPECT_THAT(absl::MakeConstSpan(v), SpanIs(s)); - - EXPECT_THAT(absl::MakeSpan(s), SpanIs(s)); - EXPECT_THAT(absl::MakeConstSpan(s), SpanIs(s)); -} - -TEST(CharSpan, MakeSpanString) { - std::string empty = ""; - auto s_empty = absl::MakeSpan(empty); - EXPECT_THAT(s_empty, SpanIs(empty)); - - std::string str = "abc"; - auto s_str = absl::MakeSpan(str); - EXPECT_THAT(s_str, SpanIs(str)); - - EXPECT_THAT(absl::MakeConstSpan(empty), SpanIs(s_empty)); - EXPECT_THAT(absl::MakeConstSpan(str), SpanIs(s_str)); -} - -TEST(IntSpan, MakeSpanArray) { - int a[] = {1, 2, 3}; - auto s = absl::MakeSpan(a); - EXPECT_THAT(s, SpanIs(a, 3)); - - const int ca[] = {1, 2, 3}; - auto s_ca = absl::MakeSpan(ca); - EXPECT_THAT(s_ca, SpanIs(ca, 3)); - - EXPECT_THAT(absl::MakeConstSpan(a), SpanIs(s)); - EXPECT_THAT(absl::MakeConstSpan(ca), SpanIs(s_ca)); -} - -// Compile-asserts that the argument has the expected decayed type. -template <typename Expected, typename T> -void CheckType(const T& /* value */) { - testing::StaticAssertTypeEq<Expected, T>(); -} - -TEST(IntSpan, MakeSpanTypes) { - std::vector<int> vec; - const std::vector<int> cvec; - int a[1]; - const int ca[] = {1}; - int* ip = a; - const int* cip = ca; - std::string s = ""; - const std::string cs = ""; - CheckType<absl::Span<int>>(absl::MakeSpan(vec)); - CheckType<absl::Span<const int>>(absl::MakeSpan(cvec)); - CheckType<absl::Span<int>>(absl::MakeSpan(ip, ip + 1)); - CheckType<absl::Span<int>>(absl::MakeSpan(ip, 1)); - CheckType<absl::Span<const int>>(absl::MakeSpan(cip, cip + 1)); - CheckType<absl::Span<const int>>(absl::MakeSpan(cip, 1)); - CheckType<absl::Span<int>>(absl::MakeSpan(a)); - CheckType<absl::Span<int>>(absl::MakeSpan(a, a + 1)); - CheckType<absl::Span<int>>(absl::MakeSpan(a, 1)); - CheckType<absl::Span<const int>>(absl::MakeSpan(ca)); - CheckType<absl::Span<const int>>(absl::MakeSpan(ca, ca + 1)); - CheckType<absl::Span<const int>>(absl::MakeSpan(ca, 1)); - CheckType<absl::Span<char>>(absl::MakeSpan(s)); - CheckType<absl::Span<const char>>(absl::MakeSpan(cs)); -} - -TEST(ConstIntSpan, MakeConstSpanTypes) { - std::vector<int> vec; - const std::vector<int> cvec; - int array[1]; - const int carray[] = {0}; - int* ptr = array; - const int* cptr = carray; - std::string s = ""; - std::string cs = ""; - CheckType<absl::Span<const int>>(absl::MakeConstSpan(vec)); - CheckType<absl::Span<const int>>(absl::MakeConstSpan(cvec)); - CheckType<absl::Span<const int>>(absl::MakeConstSpan(ptr, ptr + 1)); - CheckType<absl::Span<const int>>(absl::MakeConstSpan(ptr, 1)); - CheckType<absl::Span<const int>>(absl::MakeConstSpan(cptr, cptr + 1)); - CheckType<absl::Span<const int>>(absl::MakeConstSpan(cptr, 1)); - CheckType<absl::Span<const int>>(absl::MakeConstSpan(array)); - CheckType<absl::Span<const int>>(absl::MakeConstSpan(carray)); - CheckType<absl::Span<const char>>(absl::MakeConstSpan(s)); - CheckType<absl::Span<const char>>(absl::MakeConstSpan(cs)); -} - -TEST(IntSpan, Equality) { - const int arr1[] = {1, 2, 3, 4, 5}; - int arr2[] = {1, 2, 3, 4, 5}; - std::vector<int> vec1(std::begin(arr1), std::end(arr1)); - std::vector<int> vec2 = vec1; - std::vector<int> other_vec = {2, 4, 6, 8, 10}; - // These two slices are from different vectors, but have the same size and - // have the same elements (right now). They should compare equal. Test both - // == and !=. - const absl::Span<const int> from1 = vec1; - const absl::Span<const int> from2 = vec2; - EXPECT_EQ(from1, from1); - EXPECT_FALSE(from1 != from1); - EXPECT_EQ(from1, from2); - EXPECT_FALSE(from1 != from2); - - // These two slices have different underlying vector values. They should be - // considered not equal. Test both == and !=. - const absl::Span<const int> from_other = other_vec; - EXPECT_NE(from1, from_other); - EXPECT_FALSE(from1 == from_other); - - // Comparison between a vector and its slice should be equal. And vice-versa. - // This ensures implicit conversion to Span works on both sides of ==. - EXPECT_EQ(vec1, from1); - EXPECT_FALSE(vec1 != from1); - EXPECT_EQ(from1, vec1); - EXPECT_FALSE(from1 != vec1); - - // This verifies that absl::Span<T> can be compared freely with - // absl::Span<const T>. - const absl::Span<int> mutable_from1(vec1); - const absl::Span<int> mutable_from2(vec2); - EXPECT_EQ(from1, mutable_from1); - EXPECT_EQ(mutable_from1, from1); - EXPECT_EQ(mutable_from1, mutable_from2); - EXPECT_EQ(mutable_from2, mutable_from1); - - // Comparison between a vector and its slice should be equal for mutable - // Spans as well. - EXPECT_EQ(vec1, mutable_from1); - EXPECT_FALSE(vec1 != mutable_from1); - EXPECT_EQ(mutable_from1, vec1); - EXPECT_FALSE(mutable_from1 != vec1); - - // Comparison between convertible-to-Span-of-const and Span-of-mutable. Arrays - // are used because they're the only value type which converts to a - // Span-of-mutable. EXPECT_TRUE is used instead of EXPECT_EQ to avoid - // array-to-pointer decay. - EXPECT_TRUE(arr1 == mutable_from1); - EXPECT_FALSE(arr1 != mutable_from1); - EXPECT_TRUE(mutable_from1 == arr1); - EXPECT_FALSE(mutable_from1 != arr1); - - // Comparison between convertible-to-Span-of-mutable and Span-of-const - EXPECT_TRUE(arr2 == from1); - EXPECT_FALSE(arr2 != from1); - EXPECT_TRUE(from1 == arr2); - EXPECT_FALSE(from1 != arr2); - - // With a different size, the array slices should not be equal. - EXPECT_NE(from1, absl::Span<const int>(from1).subspan(0, from1.size() - 1)); - - // With different contents, the array slices should not be equal. - ++vec2.back(); - EXPECT_NE(from1, from2); -} - -class IntSpanOrderComparisonTest : public testing::Test { - public: - IntSpanOrderComparisonTest() - : arr_before_{1, 2, 3}, - arr_after_{1, 2, 4}, - carr_after_{1, 2, 4}, - vec_before_(std::begin(arr_before_), std::end(arr_before_)), - vec_after_(std::begin(arr_after_), std::end(arr_after_)), - before_(vec_before_), - after_(vec_after_), - cbefore_(vec_before_), - cafter_(vec_after_) {} - - protected: - int arr_before_[3], arr_after_[3]; - const int carr_after_[3]; - std::vector<int> vec_before_, vec_after_; - absl::Span<int> before_, after_; - absl::Span<const int> cbefore_, cafter_; -}; - -TEST_F(IntSpanOrderComparisonTest, CompareSpans) { - EXPECT_TRUE(cbefore_ < cafter_); - EXPECT_TRUE(cbefore_ <= cafter_); - EXPECT_TRUE(cafter_ > cbefore_); - EXPECT_TRUE(cafter_ >= cbefore_); - - EXPECT_FALSE(cbefore_ > cafter_); - EXPECT_FALSE(cafter_ < cbefore_); - - EXPECT_TRUE(before_ < after_); - EXPECT_TRUE(before_ <= after_); - EXPECT_TRUE(after_ > before_); - EXPECT_TRUE(after_ >= before_); - - EXPECT_FALSE(before_ > after_); - EXPECT_FALSE(after_ < before_); - - EXPECT_TRUE(cbefore_ < after_); - EXPECT_TRUE(cbefore_ <= after_); - EXPECT_TRUE(after_ > cbefore_); - EXPECT_TRUE(after_ >= cbefore_); - - EXPECT_FALSE(cbefore_ > after_); - EXPECT_FALSE(after_ < cbefore_); -} - -TEST_F(IntSpanOrderComparisonTest, SpanOfConstAndContainer) { - EXPECT_TRUE(cbefore_ < vec_after_); - EXPECT_TRUE(cbefore_ <= vec_after_); - EXPECT_TRUE(vec_after_ > cbefore_); - EXPECT_TRUE(vec_after_ >= cbefore_); - - EXPECT_FALSE(cbefore_ > vec_after_); - EXPECT_FALSE(vec_after_ < cbefore_); - - EXPECT_TRUE(arr_before_ < cafter_); - EXPECT_TRUE(arr_before_ <= cafter_); - EXPECT_TRUE(cafter_ > arr_before_); - EXPECT_TRUE(cafter_ >= arr_before_); - - EXPECT_FALSE(arr_before_ > cafter_); - EXPECT_FALSE(cafter_ < arr_before_); -} - -TEST_F(IntSpanOrderComparisonTest, SpanOfMutableAndContainer) { - EXPECT_TRUE(vec_before_ < after_); - EXPECT_TRUE(vec_before_ <= after_); - EXPECT_TRUE(after_ > vec_before_); - EXPECT_TRUE(after_ >= vec_before_); - - EXPECT_FALSE(vec_before_ > after_); - EXPECT_FALSE(after_ < vec_before_); - - EXPECT_TRUE(before_ < carr_after_); - EXPECT_TRUE(before_ <= carr_after_); - EXPECT_TRUE(carr_after_ > before_); - EXPECT_TRUE(carr_after_ >= before_); - - EXPECT_FALSE(before_ > carr_after_); - EXPECT_FALSE(carr_after_ < before_); -} - -TEST_F(IntSpanOrderComparisonTest, EqualSpans) { - EXPECT_FALSE(before_ < before_); - EXPECT_TRUE(before_ <= before_); - EXPECT_FALSE(before_ > before_); - EXPECT_TRUE(before_ >= before_); -} - -TEST_F(IntSpanOrderComparisonTest, Subspans) { - auto subspan = before_.subspan(0, 1); - EXPECT_TRUE(subspan < before_); - EXPECT_TRUE(subspan <= before_); - EXPECT_TRUE(before_ > subspan); - EXPECT_TRUE(before_ >= subspan); - - EXPECT_FALSE(subspan > before_); - EXPECT_FALSE(before_ < subspan); -} - -TEST_F(IntSpanOrderComparisonTest, EmptySpans) { - absl::Span<int> empty; - EXPECT_FALSE(empty < empty); - EXPECT_TRUE(empty <= empty); - EXPECT_FALSE(empty > empty); - EXPECT_TRUE(empty >= empty); - - EXPECT_TRUE(empty < before_); - EXPECT_TRUE(empty <= before_); - EXPECT_TRUE(before_ > empty); - EXPECT_TRUE(before_ >= empty); - - EXPECT_FALSE(empty > before_); - EXPECT_FALSE(before_ < empty); -} - -TEST(IntSpan, ExposesContainerTypesAndConsts) { - absl::Span<int> slice; - CheckType<absl::Span<int>::iterator>(slice.begin()); - EXPECT_TRUE((std::is_convertible<decltype(slice.begin()), - absl::Span<int>::const_iterator>::value)); - CheckType<absl::Span<int>::const_iterator>(slice.cbegin()); - EXPECT_TRUE((std::is_convertible<decltype(slice.end()), - absl::Span<int>::const_iterator>::value)); - CheckType<absl::Span<int>::const_iterator>(slice.cend()); - CheckType<absl::Span<int>::reverse_iterator>(slice.rend()); - EXPECT_TRUE( - (std::is_convertible<decltype(slice.rend()), - absl::Span<int>::const_reverse_iterator>::value)); - CheckType<absl::Span<int>::const_reverse_iterator>(slice.crend()); - testing::StaticAssertTypeEq<int, absl::Span<int>::value_type>(); - testing::StaticAssertTypeEq<int, absl::Span<const int>::value_type>(); - testing::StaticAssertTypeEq<int*, absl::Span<int>::pointer>(); - testing::StaticAssertTypeEq<const int*, absl::Span<const int>::pointer>(); - testing::StaticAssertTypeEq<int&, absl::Span<int>::reference>(); - testing::StaticAssertTypeEq<const int&, absl::Span<const int>::reference>(); - testing::StaticAssertTypeEq<const int&, absl::Span<int>::const_reference>(); - testing::StaticAssertTypeEq<const int&, - absl::Span<const int>::const_reference>(); - EXPECT_EQ(static_cast<absl::Span<int>::size_type>(-1), absl::Span<int>::npos); -} - -TEST(IntSpan, IteratorsAndReferences) { - auto accept_pointer = [](int*) {}; - auto accept_reference = [](int&) {}; - auto accept_iterator = [](absl::Span<int>::iterator) {}; - auto accept_const_iterator = [](absl::Span<int>::const_iterator) {}; - auto accept_reverse_iterator = [](absl::Span<int>::reverse_iterator) {}; - auto accept_const_reverse_iterator = - [](absl::Span<int>::const_reverse_iterator) {}; - - int a[1]; - absl::Span<int> s = a; - - accept_pointer(s.data()); - accept_iterator(s.begin()); - accept_const_iterator(s.begin()); - accept_const_iterator(s.cbegin()); - accept_iterator(s.end()); - accept_const_iterator(s.end()); - accept_const_iterator(s.cend()); - accept_reverse_iterator(s.rbegin()); - accept_const_reverse_iterator(s.rbegin()); - accept_const_reverse_iterator(s.crbegin()); - accept_reverse_iterator(s.rend()); - accept_const_reverse_iterator(s.rend()); - accept_const_reverse_iterator(s.crend()); - - accept_reference(s[0]); - accept_reference(s.at(0)); - accept_reference(s.front()); - accept_reference(s.back()); -} - -TEST(IntSpan, IteratorsAndReferences_Const) { - auto accept_pointer = [](int*) {}; - auto accept_reference = [](int&) {}; - auto accept_iterator = [](absl::Span<int>::iterator) {}; - auto accept_const_iterator = [](absl::Span<int>::const_iterator) {}; - auto accept_reverse_iterator = [](absl::Span<int>::reverse_iterator) {}; - auto accept_const_reverse_iterator = - [](absl::Span<int>::const_reverse_iterator) {}; - - int a[1]; - const absl::Span<int> s = a; - - accept_pointer(s.data()); - accept_iterator(s.begin()); - accept_const_iterator(s.begin()); - accept_const_iterator(s.cbegin()); - accept_iterator(s.end()); - accept_const_iterator(s.end()); - accept_const_iterator(s.cend()); - accept_reverse_iterator(s.rbegin()); - accept_const_reverse_iterator(s.rbegin()); - accept_const_reverse_iterator(s.crbegin()); - accept_reverse_iterator(s.rend()); - accept_const_reverse_iterator(s.rend()); - accept_const_reverse_iterator(s.crend()); - - accept_reference(s[0]); - accept_reference(s.at(0)); - accept_reference(s.front()); - accept_reference(s.back()); -} - -TEST(IntSpan, NoexceptTest) { - int a[] = {1, 2, 3}; - std::vector<int> v; - EXPECT_TRUE(noexcept(absl::Span<const int>())); - EXPECT_TRUE(noexcept(absl::Span<const int>(a, 2))); - EXPECT_TRUE(noexcept(absl::Span<const int>(a))); - EXPECT_TRUE(noexcept(absl::Span<const int>(v))); - EXPECT_TRUE(noexcept(absl::Span<int>(v))); - EXPECT_TRUE(noexcept(absl::Span<const int>({1, 2, 3}))); - EXPECT_TRUE(noexcept(absl::MakeSpan(v))); - EXPECT_TRUE(noexcept(absl::MakeSpan(a))); - EXPECT_TRUE(noexcept(absl::MakeSpan(a, 2))); - EXPECT_TRUE(noexcept(absl::MakeSpan(a, a + 1))); - EXPECT_TRUE(noexcept(absl::MakeConstSpan(v))); - EXPECT_TRUE(noexcept(absl::MakeConstSpan(a))); - EXPECT_TRUE(noexcept(absl::MakeConstSpan(a, 2))); - EXPECT_TRUE(noexcept(absl::MakeConstSpan(a, a + 1))); - - absl::Span<int> s(v); - EXPECT_TRUE(noexcept(s.data())); - EXPECT_TRUE(noexcept(s.size())); - EXPECT_TRUE(noexcept(s.length())); - EXPECT_TRUE(noexcept(s.empty())); - EXPECT_TRUE(noexcept(s[0])); - EXPECT_TRUE(noexcept(s.front())); - EXPECT_TRUE(noexcept(s.back())); - EXPECT_TRUE(noexcept(s.begin())); - EXPECT_TRUE(noexcept(s.cbegin())); - EXPECT_TRUE(noexcept(s.end())); - EXPECT_TRUE(noexcept(s.cend())); - EXPECT_TRUE(noexcept(s.rbegin())); - EXPECT_TRUE(noexcept(s.crbegin())); - EXPECT_TRUE(noexcept(s.rend())); - EXPECT_TRUE(noexcept(s.crend())); - EXPECT_TRUE(noexcept(s.remove_prefix(0))); - EXPECT_TRUE(noexcept(s.remove_suffix(0))); -} - -// ConstexprTester exercises expressions in a constexpr context. Simply placing -// the expression in a constexpr function is not enough, as some compilers will -// simply compile the constexpr function as runtime code. Using template -// parameters forces compile-time execution. -template <int i> -struct ConstexprTester {}; - -#define ABSL_TEST_CONSTEXPR(expr) \ - do { \ - ABSL_ATTRIBUTE_UNUSED ConstexprTester<(expr, 1)> t; \ - } while (0) - -struct ContainerWithConstexprMethods { - constexpr int size() const { return 1; } - constexpr const int* data() const { return &i; } - const int i; -}; - -TEST(ConstIntSpan, ConstexprTest) { - static constexpr int a[] = {1, 2, 3}; - static constexpr int sized_arr[2] = {1, 2}; - static constexpr ContainerWithConstexprMethods c{1}; - ABSL_TEST_CONSTEXPR(absl::Span<const int>()); - ABSL_TEST_CONSTEXPR(absl::Span<const int>(a, 2)); - ABSL_TEST_CONSTEXPR(absl::Span<const int>(sized_arr)); - ABSL_TEST_CONSTEXPR(absl::Span<const int>(c)); - ABSL_TEST_CONSTEXPR(absl::MakeSpan(&a[0], 1)); - ABSL_TEST_CONSTEXPR(absl::MakeSpan(c)); - ABSL_TEST_CONSTEXPR(absl::MakeSpan(a)); - ABSL_TEST_CONSTEXPR(absl::MakeConstSpan(&a[0], 1)); - ABSL_TEST_CONSTEXPR(absl::MakeConstSpan(c)); - ABSL_TEST_CONSTEXPR(absl::MakeConstSpan(a)); - - constexpr absl::Span<const int> span = c; - ABSL_TEST_CONSTEXPR(span.data()); - ABSL_TEST_CONSTEXPR(span.size()); - ABSL_TEST_CONSTEXPR(span.length()); - ABSL_TEST_CONSTEXPR(span.empty()); - ABSL_TEST_CONSTEXPR(span.begin()); - ABSL_TEST_CONSTEXPR(span.cbegin()); - ABSL_TEST_CONSTEXPR(span.subspan(0, 0)); - ABSL_TEST_CONSTEXPR(span.first(1)); - ABSL_TEST_CONSTEXPR(span.last(1)); - ABSL_TEST_CONSTEXPR(span[0]); -} - -struct BigStruct { - char bytes[10000]; -}; - -TEST(Span, SpanSize) { - EXPECT_LE(sizeof(absl::Span<int>), 2 * sizeof(void*)); - EXPECT_LE(sizeof(absl::Span<BigStruct>), 2 * sizeof(void*)); -} - -TEST(Span, Hash) { - int array[] = {1, 2, 3, 4}; - int array2[] = {1, 2, 3}; - using T = absl::Span<const int>; - EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly( - {// Empties - T(), T(nullptr, 0), T(array, 0), T(array2, 0), - // Different array with same value - T(array, 3), T(array2), T({1, 2, 3}), - // Same array, but different length - T(array, 1), T(array, 2), - // Same length, but different array - T(array + 1, 2), T(array + 2, 2)})); -} - -} // namespace |