diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/stdapis/boost/graph/named_function_params.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/stdapis/boost/graph/named_function_params.hpp	Tue Mar 16 16:12:26 2010 +0000
@@ -0,0 +1,753 @@
+//=======================================================================
+// 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_GRAPH_NAMED_FUNCTION_PARAMS_HPP
+#define BOOST_GRAPH_NAMED_FUNCTION_PARAMS_HPP
+
+#include <boost/graph/properties.hpp>
+
+namespace boost {
+
+  struct distance_compare_t { };
+  struct distance_combine_t { };
+  struct distance_inf_t { };
+  struct distance_zero_t { };
+  struct buffer_param_t { };
+  struct edge_copy_t { };
+  struct vertex_copy_t { };
+  struct vertex_isomorphism_t { };
+  struct vertex_invariant_t { };
+  struct vertex_invariant1_t { };
+  struct vertex_invariant2_t { };
+  struct edge_compare_t { };
+  struct vertex_max_invariant_t { };
+  struct orig_to_copy_t { };
+  struct root_vertex_t { };
+  struct attractive_force_t { };
+  struct repulsive_force_t { };
+  struct force_pairs_t { };
+  struct cooling_t { };
+  struct vertex_displacement_t { };
+  struct iterations_t { };
+  struct diameter_range_t { };
+  struct learning_constant_range_t { };
+
+  namespace detail {
+    template <class T>
+    struct wrap_ref {
+      wrap_ref(T& r) : ref(r) {}
+      T& ref;
+    };
+  }
+
+  template <typename T, typename Tag, typename Base = no_property>
+  struct bgl_named_params : public Base
+  {
+    typedef bgl_named_params self;
+    typedef Base next_type;
+    typedef Tag tag_type;
+    typedef T value_type;
+    bgl_named_params(T v) : m_value(v) { }
+    bgl_named_params(T v, const Base& b) : Base(b), m_value(v) { }
+    T m_value;
+
+    template <typename WeightMap>
+    bgl_named_params<WeightMap, edge_weight_t, self>
+    weight_map(const WeightMap& pmap) const {
+      typedef bgl_named_params<WeightMap, edge_weight_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename WeightMap>
+    bgl_named_params<WeightMap, edge_weight2_t, self>
+    weight_map2(const WeightMap& pmap) const {
+      typedef bgl_named_params<WeightMap, edge_weight2_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename DistanceMap>
+    bgl_named_params<DistanceMap, vertex_distance_t, self>
+    distance_map(const DistanceMap& pmap) const {
+      typedef bgl_named_params<DistanceMap, vertex_distance_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename PredecessorMap>
+    bgl_named_params<PredecessorMap, vertex_predecessor_t, self>
+    predecessor_map(const PredecessorMap& pmap) const {
+      typedef bgl_named_params<PredecessorMap, vertex_predecessor_t, self> 
+        Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename RankMap>
+    bgl_named_params<RankMap, vertex_rank_t, self>
+    rank_map(const RankMap& pmap) const {
+      typedef bgl_named_params<RankMap, vertex_rank_t, self> 
+        Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename RootMap>
+    bgl_named_params<RootMap, vertex_root_t, self>
+    root_map(const RootMap& pmap) const {
+      typedef bgl_named_params<RootMap, vertex_root_t, self> 
+        Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename Vertex>
+    bgl_named_params<Vertex, root_vertex_t, self>
+    root_vertex(const Vertex& r) const {
+      typedef bgl_named_params<Vertex, root_vertex_t, self> Params;
+      return Params(r, *this);
+    }
+
+    template <typename EdgeCentralityMap>
+    bgl_named_params<EdgeCentralityMap, edge_centrality_t, self>
+    edge_centrality_map(const EdgeCentralityMap& r) const {
+      typedef bgl_named_params<EdgeCentralityMap, edge_centrality_t, self> Params;
+      return Params(r, *this);
+    }
+
+    template <typename CentralityMap>
+    bgl_named_params<CentralityMap, vertex_centrality_t, self>
+    centrality_map(const CentralityMap& r) const {
+      typedef bgl_named_params<CentralityMap, vertex_centrality_t, self> Params;
+      return Params(r, *this);
+    }
+
+    template <typename ColorMap>
+    bgl_named_params<ColorMap, vertex_color_t, self>
+    color_map(const ColorMap& pmap) const {
+      typedef bgl_named_params<ColorMap, vertex_color_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename ColorMap>
+    bgl_named_params<ColorMap, vertex_color_t, self>
+    vertex_color_map(const ColorMap& pmap) const {
+      typedef bgl_named_params<ColorMap, vertex_color_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename ColorMap>
+    bgl_named_params<ColorMap, edge_color_t, self>
+    edge_color_map(const ColorMap& pmap) const {
+      typedef bgl_named_params<ColorMap, edge_color_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename CapacityMap>
+    bgl_named_params<CapacityMap, edge_capacity_t, self>
+    capacity_map(CapacityMap pmap) {
+      typedef bgl_named_params<CapacityMap, edge_capacity_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename Residual_CapacityMap>
+    bgl_named_params<Residual_CapacityMap, edge_residual_capacity_t, self>
+    residual_capacity_map(Residual_CapacityMap pmap) {
+      typedef bgl_named_params<Residual_CapacityMap, 
+        edge_residual_capacity_t, self>
+        Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename ReverseMap>
+    bgl_named_params<ReverseMap, edge_reverse_t, self>
+    reverse_edge_map(ReverseMap pmap) {
+      typedef bgl_named_params<ReverseMap, 
+        edge_reverse_t, self>
+        Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename DiscoverTimeMap>
+    bgl_named_params<DiscoverTimeMap, vertex_discover_time_t, self>
+    discover_time_map(const DiscoverTimeMap& pmap) const {
+      typedef bgl_named_params<DiscoverTimeMap, vertex_discover_time_t, self>
+        Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename LowPointMap>
+    bgl_named_params<LowPointMap, vertex_lowpoint_t, self>
+    lowpoint_map(const LowPointMap& pmap) const {
+      typedef bgl_named_params<LowPointMap, vertex_lowpoint_t, self>
+        Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename IndexMap>
+    bgl_named_params<IndexMap, vertex_index_t, self>
+    vertex_index_map(const IndexMap& pmap) const {
+      typedef bgl_named_params<IndexMap, vertex_index_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename IndexMap>
+    bgl_named_params<IndexMap, vertex_index1_t, self>
+    vertex_index1_map(const IndexMap& pmap) const {
+      typedef bgl_named_params<IndexMap, vertex_index1_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename IndexMap>
+    bgl_named_params<IndexMap, vertex_index2_t, self>
+    vertex_index2_map(const IndexMap& pmap) const {
+      typedef bgl_named_params<IndexMap, vertex_index2_t, self> Params;
+      return Params(pmap, *this);
+    }
+
+    template <typename Visitor>
+    bgl_named_params<Visitor, graph_visitor_t, self>
+    visitor(const Visitor& vis) const {
+      typedef bgl_named_params<Visitor, graph_visitor_t, self> Params;
+      return Params(vis, *this);
+    }
+
+    template <typename Compare>
+    bgl_named_params<Compare, distance_compare_t, self>
+    distance_compare(Compare cmp) const {
+      typedef bgl_named_params<Compare, distance_compare_t, self> Params;
+      return Params(cmp, *this);
+    }
+
+    template <typename Combine>
+    bgl_named_params<Combine, distance_combine_t, self>
+    distance_combine(Combine cmb) const {
+      typedef bgl_named_params<Combine, distance_combine_t, self> Params;
+      return Params(cmb, *this);
+    }
+
+    template <typename Init>
+    bgl_named_params<Init, distance_inf_t, self>
+    distance_inf(Init init) const {
+      typedef bgl_named_params<Init, distance_inf_t, self> Params;
+      return Params(init, *this);
+    }
+
+    template <typename Init>
+    bgl_named_params<Init, distance_zero_t, self>
+    distance_zero(Init init) const {
+      typedef bgl_named_params<Init, distance_zero_t, self> Params;
+      return Params(init, *this);
+    }
+
+    template <typename Buffer>
+    bgl_named_params<detail::wrap_ref<Buffer>, buffer_param_t, self>
+    buffer(Buffer& b) const {
+      typedef bgl_named_params<detail::wrap_ref<Buffer>, buffer_param_t, self> 
+        Params;
+      return Params(detail::wrap_ref<Buffer>(b), *this);
+    }
+
+    template <typename Copier>
+    bgl_named_params<Copier, edge_copy_t, self>
+    edge_copy(const Copier& c) const {
+      typedef bgl_named_params<Copier, edge_copy_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template <typename Copier>
+    bgl_named_params<Copier, vertex_copy_t, self>
+    vertex_copy(const Copier& c) const {
+      typedef bgl_named_params<Copier, vertex_copy_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template <typename Orig2CopyMap>
+    bgl_named_params<Orig2CopyMap, orig_to_copy_t, self>
+    orig_to_copy(const Orig2CopyMap& c) const {
+      typedef bgl_named_params<Orig2CopyMap, orig_to_copy_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template <typename IsoMap>
+    bgl_named_params<IsoMap, vertex_isomorphism_t, self>
+    isomorphism_map(const IsoMap& c) const {
+      typedef bgl_named_params<IsoMap, vertex_isomorphism_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template <typename VertexInvar>
+    bgl_named_params<VertexInvar, vertex_invariant_t, self>
+    vertex_invariant(const VertexInvar& c) const {
+      typedef bgl_named_params<VertexInvar, vertex_invariant_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template <typename VertexDisplacement>
+    bgl_named_params<VertexDisplacement, vertex_displacement_t, self>
+    displacement_map(const VertexDisplacement& c) const {
+      typedef bgl_named_params<VertexDisplacement, vertex_displacement_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template <typename AttractiveForce>
+    bgl_named_params<AttractiveForce, attractive_force_t, self>
+    attractive_force(const AttractiveForce& c) {
+      typedef bgl_named_params<AttractiveForce, attractive_force_t, self> Params;
+      return Params(c, *this);
+    }
+    
+    template <typename RepulsiveForce>
+    bgl_named_params<RepulsiveForce, repulsive_force_t, self>
+    repulsive_force(const RepulsiveForce& c) {
+      typedef bgl_named_params<RepulsiveForce, repulsive_force_t, self> Params;
+      return Params(c, *this);
+    }
+    
+    template <typename ForcePairs>
+    bgl_named_params<ForcePairs, force_pairs_t, self>
+    force_pairs(const ForcePairs& c) {
+      typedef bgl_named_params<ForcePairs, force_pairs_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template <typename Cooling>
+    bgl_named_params<Cooling, cooling_t, self>
+    cooling(const Cooling& c) {
+      typedef bgl_named_params<Cooling, cooling_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template <typename TP>
+    bgl_named_params<TP, iterations_t, self>
+    iterations(const TP& c) {
+      typedef bgl_named_params<TP, iterations_t, self> Params;
+      return Params(c, *this);
+    }    
+
+    template<typename TP>
+    bgl_named_params<std::pair<TP, TP>, diameter_range_t, self>
+    diameter_range(const std::pair<TP, TP>& c) {
+      typedef bgl_named_params<std::pair<TP, TP>, diameter_range_t, self> Params;
+      return Params(c, *this);
+    }
+
+    template<typename TP>
+    bgl_named_params<std::pair<TP, TP>, learning_constant_range_t, self>
+    learning_constant_range(const std::pair<TP, TP>& c) {
+      typedef bgl_named_params<std::pair<TP, TP>, learning_constant_range_t, self>
+        Params;
+      return Params(c, *this);
+    }
+  };
+
+  template <typename WeightMap>
+  bgl_named_params<WeightMap, edge_weight_t>
+  weight_map(WeightMap pmap) {
+    typedef bgl_named_params<WeightMap, edge_weight_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename WeightMap>
+  bgl_named_params<WeightMap, edge_weight2_t>
+  weight_map2(WeightMap pmap) {
+    typedef bgl_named_params<WeightMap, edge_weight2_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename DistanceMap>
+  bgl_named_params<DistanceMap, vertex_distance_t>
+  distance_map(DistanceMap pmap) {
+    typedef bgl_named_params<DistanceMap, vertex_distance_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename PredecessorMap>
+  bgl_named_params<PredecessorMap, vertex_predecessor_t>
+  predecessor_map(PredecessorMap pmap) {
+    typedef bgl_named_params<PredecessorMap, vertex_predecessor_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename RankMap>
+  bgl_named_params<RankMap, vertex_rank_t>
+  rank_map(RankMap pmap) {
+    typedef bgl_named_params<RankMap, vertex_rank_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename RootMap>
+  bgl_named_params<RootMap, vertex_root_t>
+  root_map(RootMap pmap) {
+    typedef bgl_named_params<RootMap, vertex_root_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename Vertex>
+  bgl_named_params<Vertex, root_vertex_t>
+  root_vertex(const Vertex& r) {
+    typedef bgl_named_params<Vertex, root_vertex_t> Params;
+    return Params(r);
+  }
+
+  template <typename EdgeCentralityMap>
+  bgl_named_params<EdgeCentralityMap, edge_centrality_t>
+  edge_centrality_map(const EdgeCentralityMap& r) {
+    typedef bgl_named_params<EdgeCentralityMap, edge_centrality_t> Params;
+    return Params(r);
+  }
+
+  template <typename CentralityMap>
+  bgl_named_params<CentralityMap, vertex_centrality_t>
+  centrality_map(const CentralityMap& r) {
+    typedef bgl_named_params<CentralityMap, vertex_centrality_t> Params;
+    return Params(r);
+  }
+
+  template <typename ColorMap>
+  bgl_named_params<ColorMap, vertex_color_t>
+  color_map(ColorMap pmap) {
+    typedef bgl_named_params<ColorMap, vertex_color_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename CapacityMap>
+  bgl_named_params<CapacityMap, edge_capacity_t>
+  capacity_map(CapacityMap pmap) {
+    typedef bgl_named_params<CapacityMap, edge_capacity_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename Residual_CapacityMap>
+  bgl_named_params<Residual_CapacityMap, edge_residual_capacity_t>
+  residual_capacity_map(Residual_CapacityMap pmap) {
+    typedef bgl_named_params<Residual_CapacityMap, edge_residual_capacity_t>
+      Params;
+    return Params(pmap);
+  }
+
+  template <typename ReverseMap>
+  bgl_named_params<ReverseMap, edge_reverse_t>
+  reverse_edge_map(ReverseMap pmap) {
+    typedef bgl_named_params<ReverseMap, edge_reverse_t>
+      Params;
+    return Params(pmap);
+  }
+
+  template <typename DiscoverTimeMap>
+  bgl_named_params<DiscoverTimeMap, vertex_discover_time_t>
+  discover_time_map(DiscoverTimeMap pmap) {
+    typedef bgl_named_params<DiscoverTimeMap, vertex_discover_time_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename LowPointMap>
+  bgl_named_params<LowPointMap, vertex_lowpoint_t>
+  lowpoint_map(LowPointMap pmap) {
+    typedef bgl_named_params<LowPointMap, vertex_lowpoint_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename IndexMap>
+  bgl_named_params<IndexMap, vertex_index_t>
+  vertex_index_map(IndexMap pmap) {
+    typedef bgl_named_params<IndexMap, vertex_index_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename IndexMap>
+  bgl_named_params<IndexMap, vertex_index1_t>
+  vertex_index1_map(const IndexMap& pmap) {
+    typedef bgl_named_params<IndexMap, vertex_index1_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename IndexMap>
+  bgl_named_params<IndexMap, vertex_index2_t>
+  vertex_index2_map(const IndexMap& pmap) {
+    typedef bgl_named_params<IndexMap, vertex_index2_t> Params;
+    return Params(pmap);
+  }
+
+  template <typename Visitor>
+  bgl_named_params<Visitor, graph_visitor_t>
+  visitor(const Visitor& vis) {
+    typedef bgl_named_params<Visitor, graph_visitor_t> Params;
+    return Params(vis);
+  }
+
+  template <typename Compare>
+  bgl_named_params<Compare, distance_compare_t>
+  distance_compare(Compare cmp) {
+    typedef bgl_named_params<Compare, distance_compare_t> Params;
+    return Params(cmp);
+  }
+
+  template <typename Combine>
+  bgl_named_params<Combine, distance_combine_t>
+  distance_combine(Combine cmb) {
+    typedef bgl_named_params<Combine, distance_combine_t> Params;
+    return Params(cmb);
+  }
+
+  template <typename Init>
+  bgl_named_params<Init, distance_inf_t>
+  distance_inf(Init init) {
+    typedef bgl_named_params<Init, distance_inf_t> Params;
+    return Params(init);
+  }
+
+  template <typename Init>
+  bgl_named_params<Init, distance_zero_t>
+  distance_zero(Init init) {
+    typedef bgl_named_params<Init, distance_zero_t> Params;
+    return Params(init);
+  }
+
+  template <typename Buffer>
+  bgl_named_params<detail::wrap_ref<Buffer>, buffer_param_t>
+  buffer(Buffer& b) {
+    typedef bgl_named_params<detail::wrap_ref<Buffer>, buffer_param_t> Params;
+    return Params(detail::wrap_ref<Buffer>(b));
+  }
+
+  template <typename Copier>
+  bgl_named_params<Copier, edge_copy_t>
+  edge_copy(const Copier& c) {
+    typedef bgl_named_params<Copier, edge_copy_t> Params;
+    return Params(c);
+  }
+
+  template <typename Copier>
+  bgl_named_params<Copier, vertex_copy_t>
+  vertex_copy(const Copier& c) {
+    typedef bgl_named_params<Copier, vertex_copy_t> Params;
+    return Params(c);
+  }
+
+  template <typename Orig2CopyMap>
+  bgl_named_params<Orig2CopyMap, orig_to_copy_t>
+  orig_to_copy(const Orig2CopyMap& c) {
+    typedef bgl_named_params<Orig2CopyMap, orig_to_copy_t> Params;
+    return Params(c);
+  }
+
+  template <typename IsoMap>
+  bgl_named_params<IsoMap, vertex_isomorphism_t>
+  isomorphism_map(const IsoMap& c) {
+    typedef bgl_named_params<IsoMap, vertex_isomorphism_t> Params;
+    return Params(c);
+  }
+
+  template <typename VertexInvar>
+  bgl_named_params<VertexInvar, vertex_invariant_t>
+  vertex_invariant(const VertexInvar& c) {
+    typedef bgl_named_params<VertexInvar, vertex_invariant_t> Params;
+    return Params(c);
+  }
+
+  template <typename VertexDisplacement>
+  bgl_named_params<VertexDisplacement, vertex_displacement_t>
+  displacement_map(const VertexDisplacement& c) {
+    typedef bgl_named_params<VertexDisplacement, vertex_displacement_t> Params;
+    return Params(c);
+  }
+
+  template <typename AttractiveForce>
+  bgl_named_params<AttractiveForce, attractive_force_t>
+  attractive_force(const AttractiveForce& c) {
+    typedef bgl_named_params<AttractiveForce, attractive_force_t> Params;
+    return Params(c);
+  }
+
+  template <typename RepulsiveForce>
+  bgl_named_params<RepulsiveForce, repulsive_force_t>
+  repulsive_force(const RepulsiveForce& c) {
+    typedef bgl_named_params<RepulsiveForce, repulsive_force_t> Params;
+    return Params(c);
+  }
+
+  template <typename ForcePairs>
+  bgl_named_params<ForcePairs, force_pairs_t>
+  force_pairs(const ForcePairs& c) {
+    typedef bgl_named_params<ForcePairs, force_pairs_t> Params;
+    return Params(c);
+  }
+
+  template <typename Cooling>
+  bgl_named_params<Cooling, cooling_t>
+  cooling(const Cooling& c) {
+    typedef bgl_named_params<Cooling, cooling_t> Params;
+    return Params(c);
+  }
+
+  template <typename T>
+  bgl_named_params<T, iterations_t>
+  iterations(const T& c) {
+    typedef bgl_named_params<T, iterations_t> Params;
+    return Params(c);
+  }    
+  
+  template<typename T>
+  bgl_named_params<std::pair<T, T>, diameter_range_t>
+  diameter_range(const std::pair<T, T>& c) {
+    typedef bgl_named_params<std::pair<T, T>, diameter_range_t> Params;
+    return Params(c);
+  }
+  
+  template<typename T>
+  bgl_named_params<std::pair<T, T>, learning_constant_range_t>
+  learning_constant_range(const std::pair<T, T>& c) {
+    typedef bgl_named_params<std::pair<T, T>, learning_constant_range_t>
+      Params;
+    return Params(c);
+  }
+
+  //===========================================================================
+  // Functions for extracting parameters from bgl_named_params
+
+  template <class Tag1, class Tag2, class T1, class Base>
+  inline
+  typename property_value< bgl_named_params<T1,Tag1,Base>, Tag2>::type
+  get_param(const bgl_named_params<T1,Tag1,Base>& p, Tag2 tag2)
+  {
+    enum { match = detail::same_property<Tag1,Tag2>::value };
+    typedef typename
+      property_value< bgl_named_params<T1,Tag1,Base>, Tag2>::type T2;
+    T2* t2 = 0;
+    typedef detail::property_value_dispatch<match> Dispatcher;
+    return Dispatcher::const_get_value(p, t2, tag2);
+  }
+
+
+  namespace detail {
+    // MSVC++ workaround
+    template <class Param>
+    struct choose_param_helper {
+      template <class Default> struct result { typedef Param type; };
+      template <typename Default>
+      static const Param& apply(const Param& p, const Default&) { return p; }
+    };
+    template <>
+    struct choose_param_helper<error_property_not_found> {
+      template <class Default> struct result { typedef Default type; };
+      template <typename Default>
+      static const Default& apply(const error_property_not_found&, const Default& d)
+        { return d; }
+    };
+  } // namespace detail
+
+  template <class P, class Default> 
+  const typename detail::choose_param_helper<P>::template result<Default>::type&
+  choose_param(const P& param, const Default& d) { 
+    return detail::choose_param_helper<P>::apply(param, d);
+  }
+
+  template <typename T>
+  inline bool is_default_param(const T&) { return false; }
+
+  inline bool is_default_param(const detail::error_property_not_found&)
+    { return true; }
+
+  namespace detail {
+
+    struct choose_parameter {
+      template <class P, class Graph, class Tag>
+      struct bind_ {
+        typedef const P& const_result_type;
+        typedef const P& result_type;
+        typedef P type;
+      };
+
+      template <class P, class Graph, class Tag>
+      static typename bind_<P, Graph, Tag>::const_result_type
+      const_apply(const P& p, const Graph&, Tag&) 
+      { return p; }
+
+      template <class P, class Graph, class Tag>
+      static typename bind_<P, Graph, Tag>::result_type
+      apply(const P& p, Graph&, Tag&) 
+      { return p; }
+    };
+
+    struct choose_default_param {
+      template <class P, class Graph, class Tag>
+      struct bind_ {
+        typedef typename property_map<Graph, Tag>::type 
+          result_type;
+        typedef typename property_map<Graph, Tag>::const_type 
+          const_result_type;
+        typedef typename property_map<Graph, Tag>::const_type 
+          type;
+      };
+
+      template <class P, class Graph, class Tag>
+      static typename bind_<P, Graph, Tag>::const_result_type
+      const_apply(const P&, const Graph& g, Tag tag) { 
+        return get(tag, g); 
+      }
+      template <class P, class Graph, class Tag>
+      static typename bind_<P, Graph, Tag>::result_type
+      apply(const P&, Graph& g, Tag tag) { 
+        return get(tag, g); 
+      }
+    };
+
+    template <class Param>
+    struct choose_property_map {
+      typedef choose_parameter type;
+    };
+    template <>
+    struct choose_property_map<detail::error_property_not_found> {
+      typedef choose_default_param type;
+    };
+
+    template <class Param, class Graph, class Tag>
+    struct choose_pmap_helper {
+      typedef typename choose_property_map<Param>::type Selector;
+      typedef typename Selector:: template bind_<Param, Graph, Tag> Bind;
+      typedef Bind type;
+      typedef typename Bind::result_type result_type;
+      typedef typename Bind::const_result_type const_result_type;
+      typedef typename Bind::type result;
+    };
+
+    // used in the max-flow algorithms
+    template <class Graph, class P, class T, class R>
+    struct edge_capacity_value
+    {
+      typedef bgl_named_params<P, T, R> Params;
+      typedef typename property_value< Params, edge_capacity_t>::type Param;
+      typedef typename detail::choose_pmap_helper<Param, Graph,
+        edge_capacity_t>::result CapacityEdgeMap;
+      typedef typename property_traits<CapacityEdgeMap>::value_type type;
+    };
+
+  } // namespace detail
+  
+
+  // Use this function instead of choose_param() when you want
+  // to avoid requiring get(tag, g) when it is not used. 
+  template <typename Param, typename Graph, typename PropertyTag>
+  typename
+    detail::choose_pmap_helper<Param,Graph,PropertyTag>::const_result_type
+  choose_const_pmap(const Param& p, const Graph& g, PropertyTag tag)
+  { 
+    typedef typename 
+      detail::choose_pmap_helper<Param,Graph,PropertyTag>::Selector Choice;
+    return Choice::const_apply(p, g, tag);
+  }
+
+  template <typename Param, typename Graph, typename PropertyTag>
+  typename detail::choose_pmap_helper<Param,Graph,PropertyTag>::result_type
+  choose_pmap(const Param& p, Graph& g, PropertyTag tag)
+  { 
+    typedef typename 
+      detail::choose_pmap_helper<Param,Graph,PropertyTag>::Selector Choice;
+    return Choice::apply(p, g, tag);
+  }
+
+} // namespace boost
+
+#endif // BOOST_GRAPH_NAMED_FUNCTION_PARAMS_HPP