1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp1z/class-deduction45.C b/gcc/testsuite/g++.dg/cpp1z/class-deduction45.C
new file mode 100644
index 00000000000..3fe8dd33b79
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1z/class-deduction45.C
@@ -0,0 +1,24 @@
+// PR c++/82308
+// { dg-options -std=c++17 }
+
+template<typename, unsigned>
+struct array {};
+
+template <unsigned R>
+class X {
+public:
+  using T = array<int, R>;
+
+  enum class C : char { A, B };
+  X(T bounds, C c = C::B) : t(bounds) {}
+
+private:
+  T t;
+};
+
+int main()
+{
+  array<int, 2> a;
+  X    d{a};
+  X<2> e{a};
+}