Fix for PR 19616: 'tuple_cat of nested tuples fails in noexcept specification'. Thanks to Louis Dionne for the fix.

llvm-svn: 219243

1 files changed, 14 insertions, 0 deletions

diff --git a/libcxx/test/utilities/tuple/tuple.tuple/tuple.creation/tuple_cat.pass.cpp b/libcxx/test/utilities/tuple/tuple.tuple/tuple.creation/tuple_cat.pass.cpp
index b47842d419c..3fca5738929 100644
--- a/libcxx/test/utilities/tuple/tuple.tuple/tuple.creation/tuple_cat.pass.cpp
+++ b/libcxx/test/utilities/tuple/tuple.tuple/tuple.creation/tuple_cat.pass.cpp
@@ -213,4 +213,18 @@ int main()
         assert(std::get<3>(t3) == 4);
         assert(std::get<4>(t3) == 5);
     }
+    {
+        // See bug #19616.
+        auto t1 = std::tuple_cat(
+            std::make_tuple(std::make_tuple(1)),
+            std::make_tuple()
+        );
+        assert(t1 == std::make_tuple(std::make_tuple(1)));
+
+        auto t2 = std::tuple_cat(
+            std::make_tuple(std::make_tuple(1)),
+            std::make_tuple(std::make_tuple(2))
+        );
+        assert(t2 == std::make_tuple(std::make_tuple(1), std::make_tuple(2)));
+    }
 }