[Mlir-commits] [mlir] [libc++] Implement ranges::contains_subrange (PR #66963)

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Tue Sep 26 17:07:45 PDT 2023


github-actions[bot] wrote:


<!--LLVM CODE FORMAT COMMENT: {clang-format}-->

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``````````bash
git-clang-format --diff 2f2319cf2406d9830a331cbf015881c55ae78806 5f33fa63e76b5d0c066773113447749c3428aa99 -- libcxx/include/__algorithm/ranges_contains_subrange.h libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains_subrange.pass.cpp
``````````

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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains_subrange.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains_subrange.pass.cpp
index fd4d858b255d..e9c300e5bb20 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains_subrange.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.contains/ranges.contains_subrange.pass.cpp
@@ -51,7 +51,8 @@ static_assert(HasContainsSubrangeSubrangeIt<int*, int*>);
 
 template <class Range1, class Range2 = UncheckedRange<int*>>
 concept HasContainsSubrangeR = requires(Range1&& range1, Range2&& range2) {
-    std::ranges::contains_subrange(std::forward<Range1>(range1), std::forward<Range2>(range2)); };
+  std::ranges::contains_subrange(std::forward<Range1>(range1), std::forward<Range2>(range2));
+};
 
 static_assert(HasContainsSubrangeR<UncheckedRange<int*>>);
 static_assert(HasContainsSubrangeR<ForwardRangeNotDerivedFrom>);
@@ -68,27 +69,26 @@ static std::vector<int> comparable_data;
 
 template <class Iter1, class Sent1 = Iter1, class Iter2, class Sent2 = Iter2>
 constexpr void test_iterators() {
-  {  // simple tests
-    int a[] = {1, 2, 3, 4, 5, 6};
-    int p[] = {3, 4, 5};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+  { // simple tests
+    int a[]       = {1, 2, 3, 4, 5, 6};
+    int p[]       = {3, 4, 5};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     {
       [[maybe_unused]] std::same_as<bool> decltype(auto) ret =
-        std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
+          std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
       assert(ret);
     }
     {
-      [[maybe_unused]] std::same_as<bool> decltype(auto) ret =
-        std::ranges::contains_subrange(whole, subrange);
+      [[maybe_unused]] std::same_as<bool> decltype(auto) ret = std::ranges::contains_subrange(whole, subrange);
       assert(ret);
     }
   }
 
   { // no match
-    int a[] = {1, 2, 3, 4, 5, 6};
-    int p[] = {3, 4, 2};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+    int a[]       = {1, 2, 3, 4, 5, 6};
+    int p[]       = {3, 4, 2};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -101,9 +101,9 @@ constexpr void test_iterators() {
   }
 
   { // range consists of just one element
-    int a[] = {3};
-    int p[] = {3, 4, 2};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 1)));
+    int a[]       = {3};
+    int p[]       = {3, 4, 2};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 1)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -116,9 +116,9 @@ constexpr void test_iterators() {
   }
 
   { // subrange consists of just one element
-    int a[] = {23, 1, 20, 3, 54, 2};
-    int p[] = {3};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+    int a[]       = {23, 1, 20, 3, 54, 2};
+    int p[]       = {3};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 1)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -131,9 +131,9 @@ constexpr void test_iterators() {
   }
 
   { // range has zero length
-    int a[] = {};
-    int p[] = {3, 4, 2};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a)));
+    int a[]       = {};
+    int p[]       = {3, 4, 2};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -146,9 +146,9 @@ constexpr void test_iterators() {
   }
 
   { // subrange has zero length
-    int a[] = {3, 4, 2};
-    int p[] = {};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 3)));
+    int a[]       = {3, 4, 2};
+    int p[]       = {};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 3)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -161,9 +161,9 @@ constexpr void test_iterators() {
   }
 
   { // range and subrange are identical
-    int a[] = {3, 4, 11, 32, 54, 2};
-    int p[] = {3, 4, 11, 32, 54, 2};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
+    int a[]       = {3, 4, 11, 32, 54, 2};
+    int p[]       = {3, 4, 11, 32, 54, 2};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 6)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 6)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -176,9 +176,9 @@ constexpr void test_iterators() {
   }
 
   { // subrange is longer than range
-    int a[] = {3, 4, 2};
-    int p[] = {23, 3, 4, 2, 11, 32, 54, 2};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 3)));
+    int a[]       = {3, 4, 2};
+    int p[]       = {23, 3, 4, 2, 11, 32, 54, 2};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 3)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 8)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -191,9 +191,9 @@ constexpr void test_iterators() {
   }
 
   { // subrange is subsequence
-    int a[] = {23, 1, 0, 54, 2};
-    int p[] = {1, 0, 2};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 5)));
+    int a[]       = {23, 1, 0, 54, 2};
+    int p[]       = {1, 0, 2};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 5)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -206,9 +206,9 @@ constexpr void test_iterators() {
   }
 
   { // repeated subrange
-    int a[] = {23, 1, 0, 2, 54, 1, 0, 2, 23, 33};
-    int p[] = {1, 0, 2};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 10)));
+    int a[]       = {23, 1, 0, 2, 54, 1, 0, 2, 23, 33};
+    int p[]       = {1, 0, 2};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 10)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end());
@@ -221,10 +221,10 @@ constexpr void test_iterators() {
   }
 
   { // check that the predicate is used
-    int a[] = {23, 81, 61, 0, 42, 25, 1, 2, 1, 29, 2};
-    int p[] = {-1, -2, -1};
-    auto pred = [](int l, int r) { return l * -1 == r; };
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 11)));
+    int a[]       = {23, 81, 61, 0, 42, 25, 1, 2, 1, 29, 2};
+    int p[]       = {-1, -2, -1};
+    auto pred     = [](int l, int r) { return l * -1 == r; };
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 11)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     {
       bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end(), pred);
@@ -237,40 +237,44 @@ constexpr void test_iterators() {
   }
 
   { // check that the projections are used
-    int a[] = {1, 3, 15, 1, 2, 1, 8};
-    int p[] = {2, 1, 2};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 7)));
-    auto subrange  = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
+    int a[]       = {1, 3, 15, 1, 2, 1, 8};
+    int p[]       = {2, 1, 2};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 7)));
+    auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     {
-      bool ret = std::ranges::contains_subrange(whole.begin(), whole.end(), subrange.begin(), subrange.end(), {},
-         [](int i) { return i - 3; },
-         [](int i) { return i * -1; });
+      bool ret = std::ranges::contains_subrange(
+          whole.begin(),
+          whole.end(),
+          subrange.begin(),
+          subrange.end(),
+          {},
+          [](int i) { return i - 3; },
+          [](int i) { return i * -1; });
       assert(ret);
     }
     {
-      bool ret = std::ranges::contains_subrange(whole, subrange, {},
-         [](int i) { return i - 3; },
-         [](int i) { return i * -1; });
+      bool ret = std::ranges::contains_subrange(
+          whole, subrange, {}, [](int i) { return i - 3; }, [](int i) { return i * -1; });
       assert(ret);
     }
   }
 
   { // check the nodiscard extension
-    // use #pragma around to suppress error: ignoring return value of function
-    // declared with 'nodiscard' attribute [-Werror,-Wunused-result]
-    #pragma clang diagnostic push
-    #pragma clang diagnostic ignored "-Wunused-result"
-    int a[] = {1, 9, 0, 13, 25};
-    int p[] = {1, 9, 0};
-    auto whole = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 5)));
+// use #pragma around to suppress error: ignoring return value of function
+// declared with 'nodiscard' attribute [-Werror,-Wunused-result]
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-result"
+    int a[]       = {1, 9, 0, 13, 25};
+    int p[]       = {1, 9, 0};
+    auto whole    = std::ranges::subrange(Iter1(a), Sent1(Iter1(a + 5)));
     auto subrange = std::ranges::subrange(Iter2(p), Sent2(Iter2(p + 3)));
     std::ranges::contains_subrange(whole, subrange);
-    #pragma clang diagnostic pop
+#pragma clang diagnostic pop
   }
 }
 
 constexpr bool test() {
-    types::for_each(types::cpp20_input_iterator_list<int*>{}, []<class Iter2>() {
+  types::for_each(types::cpp20_input_iterator_list<int*>{}, []<class Iter2>() {
     types::for_each(types::cpp20_input_iterator_list<int*>{}, []<class Iter1>() {
       if constexpr (std::forward_iterator<Iter1> && std::forward_iterator<Iter2>)
         test_iterators<Iter1, Iter1, Iter2, Iter2>();

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</details>


https://github.com/llvm/llvm-project/pull/66963


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