diff -r aa19ca32d9b0 -r ca95f8b5c931 src/lemon/concept_check.h
--- a/src/lemon/concept_check.h	Sat Nov 13 17:47:44 2004 +0000
+++ b/src/lemon/concept_check.h	Sat Nov 13 21:37:54 2004 +0000
@@ -39,6 +39,11 @@
 #endif
   }
 
+  template <typename Concept, typename Type>
+  inline void checkConcept() {
+    function_requires<typename Concept::template Constraints<Type> >();
+  }
+
 #define BOOST_CLASS_REQUIRE(type_var, ns, concept) \
   typedef void (ns::concept <type_var>::* func##type_var##concept)(); \
   template <func##type_var##concept Tp1_> \