--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp1z/pr84325.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,16 @@
+// PR c++/84325
+// { dg-do compile { target c++17 } }
+
+struct seconds { int i_{0}; constexpr seconds (int) {} };
+template <char... _Digits> constexpr seconds operator""_s() {
+  return seconds(0);
+}
+constexpr seconds operator""_s(long double i) {
+  return seconds(0);
+}
+template<class TYPE>
+struct Param {
+  constexpr static inline seconds time_to_wait{10_s};
+};
+struct Empty {};
+Param<Empty> p;