1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp1z/class-deduction62.C b/gcc/testsuite/g++.dg/cpp1z/class-deduction62.C
new file mode 100644
index 00000000000..2baa3acb8c1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1z/class-deduction62.C
@@ -0,0 +1,22 @@
+// PR c++/88419
+// { dg-do compile { target c++17 } }
+
+template<class> struct ref_view {
+  template<class T> ref_view(T&&);
+};
+
+template<class R> ref_view(R&) -> ref_view<R>;
+
+struct ref_fn {
+  template<class R> auto operator()(R r) const
+    noexcept(noexcept(ref_view{r}));
+};
+
+template<class R> struct indirect_view {
+  indirect_view(R);
+};
+
+struct indirect_fn {
+  template<class R> auto operator()(R r) const
+    noexcept(noexcept(indirect_view{r}));
+};