Added some concept checking, and renamed a few template parameters.

[SVN r45227]

include/boost/algorithm/cluster/concept.hpp

@@ -0,0 +1,38 @@
+//  (C) Copyright Jonathan Franklin 2008.
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#if ! defined BOOST_ALGORITHM_CLUSTER_CONCEPT_HPP
+#define BOOST_ALGORITHM_CLUSTER_CONCEPT_HPP
+
+#include <boost/concept_check.hpp>
+
+namespace boost
+{
+namespace algorithm
+{
+namespace cluster
+{
+
+  // TODO: Document the purpose of this concept.
+  template<typename T, typename DistanceFunT>
+  struct DistanceComparableConcept
+  {
+    void constraints()
+    {
+      // Operation
+      d(t, t);
+    }
+  private:
+    T t;
+    DistanceFunT d;
+  };
+
+  // TODO: Add concepts here, then delete this comment.
+
+} // End of namespace cluster;
+} // End of namespace algorithm;
+} // End of namespace boost;
+
+#endif // BOOST_ALGORITHM_CLUSTER_CONCEPT_HPP