diff -r dc9fdf77007f -r f02396423239 src/work/deba/test.cpp
--- a/src/work/deba/test.cpp	Wed Mar 09 14:23:36 2005 +0000
+++ b/src/work/deba/test.cpp	Fri Mar 11 16:29:03 2005 +0000
@@ -2,7 +2,10 @@
 
 using namespace std;
 
+#include <lemon/utility.h>
 
+using namespace std;
+/*
 struct _EmptyList {
   void write() const {}
 };
@@ -49,3 +52,36 @@
 int main() {
   Writer().add(3).add("alpha").add(4.53).write();
 }
+*/
+
+class A {
+public:
+  typedef int X;
+};
+
+class C {
+};
+
+template <typename A> 
+class TRUE {
+public:
+  static const bool state = true;
+};
+
+template <typename _A> 
+class B {
+public:
+  typedef enable_if<A::X, int> state;
+};
+
+template <typename _A>
+class B<_A, void> {
+public:
+  static const bool state = true;
+};
+
+int main() {
+  printf("%s\n", B<A>::state(), true ? "true" : "false");
+  printf("%s\n", B<C>::state(), true ? "true" : "false");
+  return 0;
+}