[committed] C++ PATCH to add test for c++/79629

[Marek Polacek]

Tested x86_64-linux, applying to trunk.

2018-12-01  Marek Polacek  <pola...@redhat.com>

        PR c++/79629
        * g++.dg/other/error35.C: New test.

diff --git gcc/testsuite/g++.dg/other/error35.C 
gcc/testsuite/g++.dg/other/error35.C
new file mode 100644
index 00000000000..e9c8371f18b
--- /dev/null
+++ gcc/testsuite/g++.dg/other/error35.C
@@ -0,0 +1,14 @@
+// PR c++/79629
+// { dg-do compile { target c++14 } }
+// { dg-options "-w" }
+
+template <typename> struct S {
+  enum E : int;
+  constexpr int g() const;
+};
+enum S<char>::E;
+template <typename T> enum S<T>::E : int { b };
+template <typename T>
+constexpr int S<T>::g() const { b; } // { dg-error "not declared" }
+static_assert(S<char>().g() == 1, ""); // { dg-error "" }
+// { dg-message "in .constexpr. expansion of" "" { target *-*-* } .-1 }