1 files changed, 37 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/24_iterators/move_iterator/p2520r0.cc b/libstdc++-v3/testsuite/24_iterators/move_iterator/p2520r0.cc
new file mode 100644
index 00000000000..883d6cc09e0
--- /dev/null
+++ b/libstdc++-v3/testsuite/24_iterators/move_iterator/p2520r0.cc
@@ -0,0 +1,37 @@
+// { dg-options "-std=gnu++20" }
+// { dg-do compile { target c++20 } }
+
+// Verify P2520R0 changes to move_iterator's iterator_concept, which we treat
+// as a DR against C++20.
+
+#include <iterator>
+#if __cpp_lib_move_iterator_concept != 202207L
+# error "Feature-test macro __cpp_lib_move_iterator_concept has wrong value in <iterator>"
+#endif
+
+#undef __cpp_lib_move_iterator_concept
+#include <version>
+#if __cpp_lib_move_iterator_concept != 202207L
+# error "Feature-test macro __cpp_lib_move_iterator_concept has wrong value in <version>"
+#endif
+
+#include <testsuite_iterators.h>
+
+using __gnu_test::test_input_range;
+using __gnu_test::test_forward_range;
+using __gnu_test::test_bidirectional_range;
+using __gnu_test::test_random_access_range;
+
+using ty1 = std::move_iterator<decltype(std::declval<test_input_range<int>&>().begin())>;
+static_assert(std::same_as<ty1::iterator_concept, std::input_iterator_tag>);
+
+using ty2 = std::move_iterator<decltype(std::declval<test_forward_range<int>&>().begin())>;
+static_assert(std::same_as<ty2::iterator_concept, std::forward_iterator_tag>);
+
+using ty3 = std::move_iterator<decltype(std::declval<test_bidirectional_range<int>&>().begin())>;
+static_assert(std::same_as<ty3::iterator_concept, std::bidirectional_iterator_tag>);
+
+using ty4 = std::move_iterator<decltype(std::declval<test_random_access_range<int>&>().begin())>;
+static_assert(std::same_as<ty4::iterator_concept, std::random_access_iterator_tag>);
+
+static_assert(std::random_access_iterator<std::move_iterator<int*>>);