--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/udlit-template.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,50 @@
+// { dg-do run { target c++11 } }
+
+// Test user-defined literals.
+// Test template operator declaration and definition.
+
+#include <cassert>
+
+template<char...>
+  int operator"" _abc();
+
+template<>
+  int
+  operator"" _abc<>()
+  { return -1; }
+
+template<>
+  int
+  operator"" _abc<'L','U','E'>()
+  { return 42; }
+
+template<>
+  int
+  operator"" _abc<'6','6','6'>()
+  { return 21; }
+
+int
+test1()
+{
+  int i = operator"" _abc<'1','2','3'>();
+  assert(i == 45);
+  int universal_meaning = operator"" _abc<'L','U','E'>();
+  assert(universal_meaning == 42);
+  int b = operator"" _abc<'6','6','6'>();
+  int z = operator"" _abc<>();
+  assert(z == -1);
+  int j = 123_abc;
+  assert(j == i);
+  int jb = 666_abc;
+  assert(jb == b);
+}
+
+int
+main()
+{
+  test1();
+}
+
+template<char... Chars>
+  int operator"" _abc()
+  { return 42 + sizeof...(Chars); }