[libcxx-commits] [libcxx] [libc++] Implement P2442R1 `std::views::chunk` (PR #171234)

[Hristo Hristov via libcxx-commits]

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@@ -0,0 +1,43 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: std-at-least-c++23
+
+// <ranges>
+
+//   V models only input_range:
+//     friend constexpr range_rvalue_reference_t<V> iter_move(const inner_iterator& i)
+//       noexcept(noexcept(ranges::iter_move(i.parent_->current_.value())));
+
+#include <concepts>
+#include <ranges>
+#include <utility>
+
+#include "test_iterators.h"
+#include "test_range.h"
+
+constexpr bool test() {
+  using InnerIterator =
+      std::ranges::iterator_t<std::ranges::range_reference_t<std::ranges::chunk_view<test_view<cpp20_input_iterator>>>>;
+
+  static_assert(std::ranges::input_range<test_view<cpp20_input_iterator>>);
+  static_assert(!std::ranges::forward_range<test_view<cpp20_input_iterator>>);
+
+  static_assert(std::same_as<decltype(std::ranges::iter_move(std::declval<const InnerIterator&>())), int&&>);
+  static_assert(std::same_as<decltype(std::ranges::iter_move(std::declval<const InnerIterator&>())),
+                             std::ranges::range_rvalue_reference_t<test_view<cpp20_input_iterator>>>);
+
+  return true;
+}
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+
+  return 0;
+}
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Zingam wrote:

It looks like you are missing an empty line at the end of the file here.

https://github.com/llvm/llvm-project/pull/171234