comparison DEPENDENCIES/generic/include/boost/pending/indirect_cmp.hpp @ 16:2665513ce2d3

Add boost headers

+//
+//=======================================================================
+// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
+// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
+//
+// Distributed under 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)
+//=======================================================================
+//
+
+#ifndef BOOST_INDIRECT_CMP_HPP
+#define BOOST_INDIRECT_CMP_HPP
+
+#include <functional>
+#include <boost/config.hpp>
+#include <boost/property_map/property_map.hpp>
+
+namespace boost {
+
+  //: indirect_cmp
+  //
+  // could also do this with compose_f_gx_hx, and the member binder...
+  //
+  //!category: functors
+  //!component: type
+  //!tparam: ReadablePropertyMap - a model of ReadablePropertyMap
+  //!definition: functor.h
+  template <class ReadablePropertyMap, class Compare>
+  class indirect_cmp {
+  public:
+    typedef typename boost::property_traits<ReadablePropertyMap>::value_type T;
+    typedef typename boost::property_traits<ReadablePropertyMap>::key_type K;
+    typedef K first_argument_type;
+    typedef K second_argument_type;
+    typedef bool result_type;
+    inline indirect_cmp(const ReadablePropertyMap& df, const Compare& c = Compare())
+      : d(df), cmp(c) { }
+
+    template <class A, class B>
+    inline bool 
+    operator()(const A& u, const B& v) const {
+      const T& du = get(d, u);
+      const T& dv = get(d, v);
+      return cmp(du, dv);
+    }
+  protected:
+    ReadablePropertyMap d;
+    Compare cmp;
+  };
+
+  template <typename Compare, typename ReadablePropertyMap>
+  indirect_cmp<ReadablePropertyMap, Compare>
+  make_indirect_cmp(const Compare& cmp, ReadablePropertyMap pmap) {
+    indirect_cmp<ReadablePropertyMap, Compare> p(pmap, cmp);
+    return p;
+  }
+
+  template <class ReadablePropertyMap>
+  class indirect_pmap {
+  public:
+    typedef typename boost::property_traits<ReadablePropertyMap>::value_type T;
+    typedef typename boost::property_traits<ReadablePropertyMap>::key_type K;
+    typedef K argument_type;
+    typedef T result_type;
+    inline indirect_pmap(const ReadablePropertyMap& df)
+      : d(df) { }
+
+    inline T operator()(const K& u) const {
+      return get(d, u);
+    }
+  protected:
+    ReadablePropertyMap d;
+  };
+
+  template <typename ReadablePropertyMap>
+  indirect_pmap<ReadablePropertyMap>
+  make_indirect_pmap(ReadablePropertyMap pmap) {
+    indirect_pmap<ReadablePropertyMap> f(pmap);
+    return f;
+  }
+
+
+} // namespace boost
+
+
+#endif // GGCL_INDIRECT_CMP_HPP