1 files changed, 20 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/ext/iotaarray.cc b/libstdc++-v3/testsuite/ext/iotaarray.cc
new file mode 100644
index 0000000..b259602
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/iotaarray.cc
@@ -0,0 +1,20 @@
+// { dg-do compile { target c++26 } }
+
+#include <utility>
+#include <type_traits>
+
+template<auto N>
+void test()
+{
+  constexpr auto [id0, ...ids] = std::_IotaArray<N>;
+  static_assert( std::is_same_v<decltype(id0), const decltype(N)> );
+  static_assert( sizeof...(ids) == N - 1 );
+  static_assert( (id0 + ... + ids) == N*(N-1)/2 );
+}
+
+int main()
+{
+  test<1>();
+  test<4u>();
+  test<8ull>();
+}