Use STL algorithms available since C++14 to implement absl::equal and

absl::rotate.

Prior to C++14 these were either polyfills or fixes for bugs in
standard libraries.

PiperOrigin-RevId: 575295101
Change-Id: Ie01e77fedadc879c73203d71babd40c87a419af3

1 files changed, 0 insertions, 141 deletions

diff --git a/absl/algorithm/algorithm_test.cc b/absl/algorithm/algorithm_test.cc
index d18df024..e6ee4695 100644
--- a/absl/algorithm/algorithm_test.cc
+++ b/absl/algorithm/algorithm_test.cc
@@ -24,137 +24,6 @@
 
 namespace {
 
-TEST(EqualTest, DefaultComparisonRandomAccess) {
-  std::vector<int> v1{1, 2, 3};
-  std::vector<int> v2 = v1;
-  std::vector<int> v3 = {1, 2};
-  std::vector<int> v4 = {1, 2, 4};
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v4.begin(), v4.end()));
-}
-
-TEST(EqualTest, DefaultComparison) {
-  std::list<int> lst1{1, 2, 3};
-  std::list<int> lst2 = lst1;
-  std::list<int> lst3{1, 2};
-  std::list<int> lst4{1, 2, 4};
-
-  EXPECT_TRUE(absl::equal(lst1.begin(), lst1.end(), lst2.begin(), lst2.end()));
-  EXPECT_FALSE(absl::equal(lst1.begin(), lst1.end(), lst3.begin(), lst3.end()));
-  EXPECT_FALSE(absl::equal(lst1.begin(), lst1.end(), lst4.begin(), lst4.end()));
-}
-
-TEST(EqualTest, EmptyRange) {
-  std::vector<int> v1{1, 2, 3};
-  std::vector<int> empty1;
-  std::vector<int> empty2;
-
-  // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105705
-#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wnonnull"
-#endif
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), empty1.begin(), empty1.end()));
-#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
-#pragma GCC diagnostic pop
-#endif
-  EXPECT_FALSE(absl::equal(empty1.begin(), empty1.end(), v1.begin(), v1.end()));
-  EXPECT_TRUE(
-      absl::equal(empty1.begin(), empty1.end(), empty2.begin(), empty2.end()));
-}
-
-TEST(EqualTest, MixedIterTypes) {
-  std::vector<int> v1{1, 2, 3};
-  std::list<int> lst1{v1.begin(), v1.end()};
-  std::list<int> lst2{1, 2, 4};
-  std::list<int> lst3{1, 2};
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), lst1.begin(), lst1.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), lst2.begin(), lst2.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), lst3.begin(), lst3.end()));
-}
-
-TEST(EqualTest, MixedValueTypes) {
-  std::vector<int> v1{1, 2, 3};
-  std::vector<char> v2{1, 2, 3};
-  std::vector<char> v3{1, 2};
-  std::vector<char> v4{1, 2, 4};
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v4.begin(), v4.end()));
-}
-
-TEST(EqualTest, WeirdIterators) {
-  std::vector<bool> v1{true, false};
-  std::vector<bool> v2 = v1;
-  std::vector<bool> v3{true};
-  std::vector<bool> v4{true, true, true};
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v4.begin(), v4.end()));
-}
-
-TEST(EqualTest, CustomComparison) {
-  int n[] = {1, 2, 3, 4};
-  std::vector<int*> v1{&n[0], &n[1], &n[2]};
-  std::vector<int*> v2 = v1;
-  std::vector<int*> v3{&n[0], &n[1], &n[3]};
-  std::vector<int*> v4{&n[0], &n[1]};
-
-  auto eq = [](int* a, int* b) { return *a == *b; };
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end(), eq));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end(), eq));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v4.begin(), v4.end(), eq));
-}
-
-TEST(EqualTest, MoveOnlyPredicate) {
-  std::vector<int> v1{1, 2, 3};
-  std::vector<int> v2{4, 5, 6};
-
-  // move-only equality predicate
-  struct Eq {
-    Eq() = default;
-    Eq(Eq &&) = default;
-    Eq(const Eq &) = delete;
-    Eq &operator=(const Eq &) = delete;
-    bool operator()(const int a, const int b) const { return a == b; }
-  };
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v1.begin(), v1.end(), Eq()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end(), Eq()));
-}
-
-struct CountingTrivialPred {
-  int* count;
-  bool operator()(int, int) const {
-    ++*count;
-    return true;
-  }
-};
-
-TEST(EqualTest, RandomAccessComplexity) {
-  std::vector<int> v1{1, 1, 3};
-  std::vector<int> v2 = v1;
-  std::vector<int> v3{1, 2};
-
-  do {
-    int count = 0;
-    absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end(),
-                CountingTrivialPred{&count});
-    EXPECT_LE(count, 3);
-  } while (std::next_permutation(v2.begin(), v2.end()));
-
-  int count = 0;
-  absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end(),
-              CountingTrivialPred{&count});
-  EXPECT_EQ(count, 0);
-}
-
 class LinearSearchTest : public testing::Test {
  protected:
   LinearSearchTest() : container_{1, 2, 3} {}
@@ -178,14 +47,4 @@ TEST_F(LinearSearchTest, linear_searchConst) {
       absl::linear_search(const_container->begin(), const_container->end(), 4));
 }
 
-TEST(RotateTest, Rotate) {
-  std::vector<int> v{0, 1, 2, 3, 4};
-  EXPECT_EQ(*absl::rotate(v.begin(), v.begin() + 2, v.end()), 0);
-  EXPECT_THAT(v, testing::ElementsAreArray({2, 3, 4, 0, 1}));
-
-  std::list<int> l{0, 1, 2, 3, 4};
-  EXPECT_EQ(*absl::rotate(l.begin(), std::next(l.begin(), 3), l.end()), 0);
-  EXPECT_THAT(l, testing::ElementsAreArray({3, 4, 0, 1, 2}));
-}
-
 }  // namespace