GraphBoost.h

// WARNING: Changes to this file must be contributed back to Sawyer or else they will
//          be clobbered by the next update from Sawyer.  The Sawyer repository is at
//          https://gitlab.com/charger7534/sawyer.git.
 
 
 
 
// WARNING: Changes to this file must be contributed back to Sawyer or else they will
//          be clobbered by the next update from Sawyer.  The Sawyer repository is at
//          https://github.com/matzke1/sawyer.
 
 
 
 
// Boost Graph Library (BGL) interface around Sawyer::Container::Graph
#ifndef Sawyer_GraphBoost_H
#define Sawyer_GraphBoost_H
 
#include <Sawyer/Graph.h>
#include <Sawyer/Sawyer.h>
#include <boost/foreach.hpp>
#include <boost/graph/graph_traits.hpp>
#include <boost/graph/properties.hpp>
 
namespace Sawyer {
 
namespace Boost {
 
template<class SawyerGraph, class BoostGraph>
void sawyerGraphToBoostGraph(const SawyerGraph &sg, BoostGraph &bg /*out*/) {
    bg = BoostGraph(sg.nVertices());
    BOOST_FOREACH (const typename SawyerGraph::Edge &edge, sg.edges())
        bg.add_edge(edge.source()->id(), edge.target()->id());
}
 
template<class SawyerGraph, class BoostGraph>
BoostGraph sawyerGraphToBoostGraph(const SawyerGraph &sg) {
    BoostGraph bg;
    sawyerGraphToBoostGraph(sg, bg);
    return bg;
}
//                                      Iterators
 
// BGL vertex and edge iterators, when dereferenced, yield a BGL vertex descriptor; BGL vertex descriptors are used to look up
// property values in property maps.  Since we want O(1) lookup times for properties, we'll use Sawyer vertex and edge ID
// numbers as BGL vertex and edge descriptors.  Therefore, we need to provide iterators which when dereferenced return a Sawyer
// vertex or edge ID.
//
// Another reason for using Sawyer vertex and edge ID numbers as BGL vertex and edge descriptors is that BGL expects there to
// exist a single vertex descriptor that represents "no vertex".  We can use (size_t)(-1) for this, but we would not have been
// able to use Sawyer "end" iterators since the end of one list is not equal to the end of another list.
 
template<class V, class E, class VKey, class EKey, class Alloc>
class VertexOuterIterator {
public:
    // Five standard iterator types
    using iterator_category = std::bidirectional_iterator_tag;
    using value_type = const size_t;
    using difference_type = std::ptrdiff_t;
    using pointer = const size_t*;
    using reference = const size_t&;
 
private:
    typedef typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator BaseIter;
    BaseIter base_;
public:
    VertexOuterIterator() {}
    VertexOuterIterator(const VertexOuterIterator &other): base_(other.base_) {}
    explicit VertexOuterIterator(const BaseIter &base): base_(base) {}
    VertexOuterIterator& operator=(const VertexOuterIterator &other) { base_ = other.base_; return *this; }
    VertexOuterIterator& operator++() { ++base_; return *this; }
    VertexOuterIterator& operator--() { --base_; return *this; }
    VertexOuterIterator operator++(int) { VertexOuterIterator old = *this; ++base_; return old; }
    VertexOuterIterator operator--(int) { VertexOuterIterator old = *this; --base_; return old; }
    bool operator==(const VertexOuterIterator &other) const { return base_ == other.base_; }
    bool operator!=(const VertexOuterIterator &other) const { return base_ != other.base_; }
    const size_t& operator*() const { return base_->id(); }
    // size_t* operator->() const; //no methods defined on size_t, so not needed
};
 
template<class V, class E, class VKey, class EKey, class Alloc>
class ConstVertexOuterIterator {
public:
    // Five standard iterator types
    using iterator_category = std::bidirectional_iterator_tag;
    using value_type = const size_t;
    using difference_type = std::ptrdiff_t;
    using pointer = const size_t*;
    using reference = const size_t&;
 
private:
    typedef typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::ConstVertexIterator BaseIter;
    BaseIter base_;
public:
    ConstVertexOuterIterator() {}
    ConstVertexOuterIterator(const ConstVertexOuterIterator &other): base_(other.base_) {}
    ConstVertexOuterIterator(const VertexOuterIterator<V, E, VKey, EKey, Alloc> &other): base_(other.base_) {}
    explicit ConstVertexOuterIterator(const BaseIter &base): base_(base) {}
    ConstVertexOuterIterator& operator=(const ConstVertexOuterIterator &other) { base_ = other.base_; return *this; }
    ConstVertexOuterIterator& operator++() { ++base_; return *this; }
    ConstVertexOuterIterator& operator--() { --base_; return *this; }
    ConstVertexOuterIterator operator++(int) { ConstVertexOuterIterator old = *this; ++base_; return old; }
    ConstVertexOuterIterator operator--(int) { ConstVertexOuterIterator old = *this; --base_; return old; }
    bool operator==(const ConstVertexOuterIterator &other) const { return base_ == other.base_; }
    bool operator!=(const ConstVertexOuterIterator &other) const { return base_ != other.base_; }
    const size_t& operator*() const { return base_->id(); }
    // size_t* operator->() const; //no methods defined on size_t, so not needed
};
 
template<class V, class E, class VKey, class EKey, class Alloc>
class EdgeOuterIterator {
public:
    // Five standard iterator types
    using iterator_category = std::bidirectional_iterator_tag;
    using value_type = const size_t;
    using difference_type = std::ptrdiff_t;
    using pointer = const size_t*;
    using reference = const size_t&;
 
private:
    typedef typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::EdgeIterator BaseIter;
    BaseIter base_;
public:
    EdgeOuterIterator() {}
    EdgeOuterIterator(const EdgeOuterIterator &other): base_(other.base_) {}
    explicit EdgeOuterIterator(const BaseIter &base): base_(base) {}
    EdgeOuterIterator& operator=(const EdgeOuterIterator &other) { base_ = other.base_; return *this; }
    EdgeOuterIterator& operator++() { ++base_; return *this; }
    EdgeOuterIterator& operator--() { --base_; return *this; }
    EdgeOuterIterator operator++(int) { EdgeOuterIterator old = *this; ++base_; return old; }
    EdgeOuterIterator operator--(int) { EdgeOuterIterator old = *this; --base_; return old; }
    bool operator==(const EdgeOuterIterator &other) const { return base_ == other.base_; }
    bool operator!=(const EdgeOuterIterator &other) const { return base_ != other.base_; }
    const size_t& operator*() const { return base_->id(); }
    // size_t* operator->() const; //no methods defined on size_t, so not needed
};
 
template<class V, class E, class VKey, class EKey, class Alloc>
class ConstEdgeOuterIterator {
public:
    // Five standard iterator types
    using iterator_category = std::bidirectional_iterator_tag;
    using value_type = const size_t;
    using difference_type = std::ptrdiff_t;
    using pointer = const size_t*;
    using reference = const size_t&;
 
private:
    typedef typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::ConstEdgeIterator BaseIter;
    BaseIter base_;
public:
    ConstEdgeOuterIterator() {}
    ConstEdgeOuterIterator(const ConstEdgeOuterIterator &other): base_(other.base_) {}
    ConstEdgeOuterIterator(const EdgeOuterIterator<V, E, VKey, EKey, Alloc> &other): base_(other.base_) {}
    explicit ConstEdgeOuterIterator(const BaseIter &base): base_(base) {}
    ConstEdgeOuterIterator& operator=(const ConstEdgeOuterIterator &other) { base_ = other.base_; return *this; }
    ConstEdgeOuterIterator& operator++() { ++base_; return *this; }
    ConstEdgeOuterIterator& operator--() { --base_; return *this; }
    ConstEdgeOuterIterator operator++(int) { ConstEdgeOuterIterator old = *this; ++base_; return old; }
    ConstEdgeOuterIterator operator--(int) { ConstEdgeOuterIterator old = *this; --base_; return old; }
    bool operator==(const ConstEdgeOuterIterator &other) const { return base_ == other.base_; }
    bool operator!=(const ConstEdgeOuterIterator &other) const { return base_ != other.base_; }
    const size_t& operator*() const { return base_->id(); }
    // size_t* operator->() const; //no methods defined on size_t, so not needed
};
 
//                                      Internal properties
 
// External properties can use the BGL mechanisms that are already defined, but we need something special for internal
// properties. A BGL property map is simply a class that provides a lookup mechanism when given a vertex or edge descriptor, so
// all we need is a class that will look up the user-supplied value for a vertex or edge.
 
// User-defined value attached to a vertex.
template<class Graph>
class VertexPropertyMap {
    Graph &graph_;
public:
    typedef typename Graph::VertexValue ValueType;
    VertexPropertyMap(Graph &graph): graph_(graph) {}
    ValueType get(size_t vertexId) const {
        return graph_.findVertex(vertexId)->value();
    }
    void put(size_t vertexId, const ValueType &value) {
        graph_.findVertex(vertexId)->value() = value;
    }
    ValueType& at(size_t vertexId) {
        return graph_.findVertex(vertexId)->value();
    }
    const ValueType& at(size_t vertexId) const {
        return graph_.findVertex(vertexId)->value();
    }
};
 
// Const user-defined value attached to a vertex.
template<class Graph>
class ConstVertexPropertyMap {
    const Graph &graph_;
public:
    typedef typename Graph::VertexValue ValueType;
    ConstVertexPropertyMap(const Graph &graph): graph_(graph) {}
    ValueType get(size_t vertexId) const {
        return graph_.findVertex(vertexId)->value();
    }
    const ValueType& at(size_t vertexId) const {
        return graph_.findVertex(vertexId)->value();
    }
};
 
// User-defined value attached to an edge. Graph is any non-const Sawyer::Container::Graph<>
template<class Graph>
class EdgePropertyMap {
    Graph &graph_;
public:
    typedef typename Graph::EdgeValue ValueType;
    EdgePropertyMap(Graph &graph): graph_(graph) {}
    ValueType get(size_t edgeId) const {
        return graph_.findEdge(edgeId)->value();
    }
    void put(size_t edgeId, const ValueType &value) {
        graph_.findEdge(edgeId)->value() = value;
    }
    ValueType& at(size_t edgeId) {
        return graph_.findEdge(edgeId)->value();
    }
    const ValueType& at(size_t edgeId) const {
        return graph_.findEdge(edgeId)->value();
    }
};
 
// Const user-defined value attached to a vertex. Graph is any const Sawyer::Container::Graph<>
template<class Graph>
class ConstEdgePropertyMap {
    const Graph &graph_;
public:
    typedef typename Graph::EdgeValue ValueType;
    ConstEdgePropertyMap(const Graph &graph): graph_(graph) {}
    ValueType get(size_t edgeId) const {
        return graph_.findEdge(edgeId)->value();
    }
    const ValueType& at(size_t edgeId) const {
        return graph_.findEdge(edgeId)->value();
    }
};
 
// The ID (index) associated with each vertex.  This is a read-only property since ID numbers are managed by the graph.
template<class Graph>
class ConstVertexIdPropertyMap {
    const Graph &graph_;
public:
    ConstVertexIdPropertyMap(const Graph &graph): graph_(graph) {}
    size_t get(size_t vertexId) const {
        return vertexId;
    }
    const size_t& at(size_t vertexId) const {
        return graph_.findVertex(vertexId)->id();
    }
};
 
// The ID (index) associated with each edge.  This is a read-only property since ID numbers are managed by the graph.
template<class Graph>
class ConstEdgeIdPropertyMap {
    const Graph &graph_;
public:
    ConstEdgeIdPropertyMap(const Graph &graph): graph_(graph) {}
    size_t get(size_t edgeId) const {
        return edgeId;
    }
    const size_t& at(size_t edgeId) const {
        return graph_.findEdge(edgeId)->id();
    }
};
 
// Tags for the user-defined vertex or edge value property. These are to access the user-defined data associated with each
// vertex are value corresponding to the "V" and "E" template parameters for Sawyer::Container::Graph
struct vertex_value_t {
    typedef boost::vertex_property_tag kind;
};
struct edge_value_t {
    typedef boost::edge_property_tag kind;
};
 
struct vertex_id_t {
    typedef boost::vertex_property_tag kind;
};
 
struct edge_id_t {
    typedef boost::edge_property_tag kind;
};
 
} // namespace
} // namespace
 
 
namespace boost {
 
 
//                                      BGL trait classes
 
#if 0 // [Robb P. Matzke 2014-05-23]: Temporarily disabled because it matches too much.
// Including this file with boost/wave/util/cpp_include_paths.hpp causes problems because code like this:
//     using boost::multi_index::get;
//     return get<from>(pragma_once_files).find(filename) != pragma_once_files.end();
// in wave matches these property_traits. E.g.,
//     boost::property_traits<Sawyer::Boost::VertexPropertyMap<boost::wave::util::from> >
// and of course boost::wave::util::from has no VertexValue type.  Someone with more boost property map and template
// programming experience is needed.  For now, users should instantiate their own Sawyer::Boost::VertexPropertyMap<> class
// and use it to make their own specialization of boost::property_traits<>.
 
template<class Graph>
struct property_traits<Sawyer::Boost::VertexPropertyMap<Graph> > {
    typedef typename Graph::VertexValue value_type;
    typedef typename Graph::VertexValue &reference;
    typedef size_t key_type;                            // vertex ID number
    typedef boost::read_write_property_map_tag category;
};
 
template<class Graph>
struct property_traits<Sawyer::Boost::ConstVertexPropertyMap<Graph> > {
    typedef typename Graph::VertexValue value_type;
    typedef typename Graph::VertexValue const &reference;
    typedef size_t key_type;                            // vertex ID number
    typedef boost::readable_property_map_tag category;
};
 
template<class Graph>
struct property_traits<Sawyer::Boost::EdgePropertyMap<Graph> > {
    typedef typename Graph::EdgeValue value_type;
    typedef typename Graph::EdgeValue &reference;
    typedef size_t key_type;                            // edge ID number
    typedef boost::read_write_property_map_tag category;
};
 
template<class Graph>
struct property_traits<Sawyer::Boost::ConstEdgePropertyMap<Graph> > {
    typedef typename Graph::EdgeValue value_type;
    typedef typename Graph::EdgeValue const &reference;
    typedef size_t key_type;                            // edge ID number
    typedef boost::readable_property_map_tag category;
};
 
template<class Graph>
struct property_traits<Sawyer::Boost::ConstVertexIdPropertyMap<Graph> > {
    typedef size_t value_type;
    typedef const size_t &reference;
    typedef size_t key_type;                            // vertex ID number
    typedef boost::readable_property_map_tag category;
};
 
template<class Graph>
struct property_traits<Sawyer::Boost::ConstEdgeIdPropertyMap<Graph> > {
    typedef size_t value_type;
    typedef const size_t &reference;
    typedef size_t key_type;                            // vertex ID number
    typedef boost::readable_property_map_tag category;
};
 
#endif
 
 
template<class Graph>
struct property_map<Graph, Sawyer::Boost::vertex_value_t> {
    typedef Sawyer::Boost::VertexPropertyMap<Graph> type;
    typedef Sawyer::Boost::ConstVertexPropertyMap<const Graph> const_type;
};
 
template<class Graph>
struct property_map<Graph, Sawyer::Boost::edge_value_t> {
    typedef Sawyer::Boost::EdgePropertyMap<Graph> type;
    typedef Sawyer::Boost::ConstEdgePropertyMap<const Graph> const_type;
};
 
template<class Graph>
struct property_map<Graph, Sawyer::Boost::vertex_id_t> {
    typedef Sawyer::Boost::ConstVertexIdPropertyMap<const Graph> type;
    typedef Sawyer::Boost::ConstVertexIdPropertyMap<const Graph> const_type;
};
 
template<class Graph>
struct property_map<Graph, Sawyer::Boost::edge_id_t> {
    typedef Sawyer::Boost::ConstEdgeIdPropertyMap<const Graph> type;
    typedef Sawyer::Boost::ConstEdgeIdPropertyMap<const Graph> const_type;
};
 
//                                      Access members of property maps
 
//--- vertex value ---
 
template<class Graph>
typename Graph::VertexValue&
get(Sawyer::Boost::VertexPropertyMap<Graph> &pmap, size_t key) {
    return pmap.at(key);
}
 
template<class Graph>
const typename Graph::VertexValue&
get(const Sawyer::Boost::ConstVertexPropertyMap<Graph> &pmap, size_t key) {
    return pmap.at(key);
}
 
template<class Graph>
void
put(Sawyer::Boost::VertexPropertyMap<Graph> &pmap, size_t key, const typename Graph::VertexValue &value) {
    pmap.at(key) = value;
}
 
//--- edge value ---
 
template<class Graph>
typename Graph::EdgeValue&
get(Sawyer::Boost::EdgePropertyMap<Graph> &pmap, size_t key) {
    return pmap.at(key);
}
 
template<class Graph>
typename Graph::EdgeValue&
get(const Sawyer::Boost::ConstEdgePropertyMap<Graph> &pmap, size_t key) {
    return pmap.at(key);
}
 
template<class Graph>
void
put(Sawyer::Boost::EdgePropertyMap<Graph> &pmap, size_t key,
    const typename Graph::EdgeValue &value) {
    pmap.at(key) = value;
}
 
//---  vertex and edge ID (indices) ---
 
template<class Graph>
const size_t&
get(const Sawyer::Boost::ConstVertexIdPropertyMap<Graph> &pmap, size_t key) {
    return pmap.at(key);
}
 
template<class Graph>
const size_t&
get(const Sawyer::Boost::ConstEdgeIdPropertyMap<Graph> &pmap, size_t key) {
    return pmap.at(key);
}
 
 
//                                      Graph traits
 
template<class V, class E, class VKey, class EKey, class Alloc>
struct graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> > {
    typedef bidirectional_graph_tag traversal_category;
 
    // Graph concepts
    typedef size_t vertex_descriptor;
    typedef size_t edge_descriptor;
    typedef directed_tag directed_category;
    typedef allow_parallel_edge_tag edge_parallel_category;
    static size_t null_vertex() { return (size_t)(-1); }
 
    // VertexListGraph concepts
    typedef Sawyer::Boost::VertexOuterIterator<V, E, VKey, EKey, Alloc> vertex_iterator;
    typedef size_t vertices_size_type;
 
    // EdgeListGraph concepts
    typedef Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc> edge_iterator;
    typedef size_t edges_size_type;
 
    // IncidenceGraph concepts
    typedef Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc> out_edge_iterator;
    typedef size_t degree_size_type;
 
    // BidirectionalGraph concepts
    typedef Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc> in_edge_iterator;
 
    // MutablePropertyGraph concepts
    typedef typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexValue vertex_property_type;
    typedef typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::EdgeValue edge_property_type;
};
 
template<class V, class E, class VKey, class EKey, class Alloc>
struct graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> > {
    typedef bidirectional_graph_tag traversal_category;
 
    // Graph concepts
    typedef size_t vertex_descriptor;
    typedef size_t edge_descriptor;
    typedef directed_tag directed_category;
    typedef allow_parallel_edge_tag edge_parallel_category;
 
    // VertexListGraph concepts
    typedef Sawyer::Boost::ConstVertexOuterIterator<V, E, VKey, EKey, Alloc> vertex_iterator;
    typedef size_t vertices_size_type;
 
    // EdgeListGraph concepts
    typedef Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc> edge_iterator;
    typedef size_t edges_size_type;
 
    // IncidenceGraph concepts
    typedef Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc> out_edge_iterator;
    typedef size_t degree_size_type;
 
    // BidirectionalGraph concepts
    typedef Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc> in_edge_iterator;
};
 
//                                      Graph concepts
 
 
// BGL has a global entity that indicates no-vertex, but Sawyer doesn't--it has STL-like end() iterators.
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor
null_vertex() {
    return (size_t)(-1);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor
null_vertex() {
    return (size_t)(-1);
}
 
//                                      VertexListGraph concepts
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_iterator,
          typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_iterator>
vertices(Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return std::make_pair(Sawyer::Boost::VertexOuterIterator<V, E, VKey, EKey, Alloc>(graph.vertices().begin()),
                          Sawyer::Boost::VertexOuterIterator<V, E, VKey, EKey, Alloc>(graph.vertices().end()));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_iterator,
          typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_iterator>
vertices(const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return std::make_pair(Sawyer::Boost::ConstVertexOuterIterator<V, E, VKey, EKey, Alloc>(graph.vertices().begin()),
                          Sawyer::Boost::ConstVertexOuterIterator<V, E, VKey, EKey, Alloc>(graph.vertices().end()));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertices_size_type
num_vertices(Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.nVertices();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertices_size_type
num_vertices(const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.nVertices();
}
 
//                                      EdgeListGraph concepts
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_iterator,
          typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_iterator>
edges(Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return std::make_pair(Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc>(graph.edges().begin()),
                          Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc>(graph.edges().end()));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_iterator,
          typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_iterator>
edges(const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return std::make_pair(Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc>(graph.edges().begin()),
                          Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc>(graph.edges().end()));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edges_size_type
num_edges(Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.nEdges();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edges_size_type
num_edges(const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.nEdges();
}
 
//                                      IncidenceGraph concepts
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor
source(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_descriptor edge,
       Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.findEdge(edge)->source()->id();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor
source(typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_descriptor edge,
       const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.findEdge(edge)->source()->id();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor
target(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_descriptor edge,
       Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.findEdge(edge)->target()->id();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor
target(typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_descriptor edge,
       const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.findEdge(edge)->target()->id();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::out_edge_iterator,
          typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::out_edge_iterator>
out_edges(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
          Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator v = graph.findVertex(vertex);
    return std::make_pair(Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc>(v->outEdges().begin()),
                          Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc>(v->outEdges().end()));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::out_edge_iterator,
          typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::out_edge_iterator>
out_edges(typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
          const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::ConstVertexIterator v = graph.findVertex(vertex);
    return std::make_pair(Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc>(v->outEdges().begin()),
                          Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc>(v->outEdges().end()));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::degree_size_type
out_degree(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
           Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.findVertex(vertex)->nOutEdges();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::degree_size_type
out_degree(typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
           const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.findVertex(vertex)->nOutEdges();
}
 
//                                      BidirectionalGraph concepts
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::in_edge_iterator,
          typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::in_edge_iterator>
in_edges(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
         Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator v = graph.findVertex(vertex);
    return std::make_pair(Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc>(v->inEdges().begin()),
                          Sawyer::Boost::EdgeOuterIterator<V, E, VKey, EKey, Alloc>(v->inEdges().end()));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::in_edge_iterator,
          typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::in_edge_iterator>
in_edges(typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
         const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::ConstVertexIterator v = graph.findVertex(vertex);
    return std::make_pair(Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc>(v->inEdges().begin()),
                          Sawyer::Boost::ConstEdgeOuterIterator<V, E, VKey, EKey, Alloc>(v->inEdges().end()));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::degree_size_type
in_degree(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
          Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.findVertex(vertex)->nInEdges();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::degree_size_type
in_degree(typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
          const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.findVertex(vertex)->nInEdges();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::degree_size_type
degree(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
       Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &/*graph*/) {
    return in_degree(vertex) + out_degree(vertex);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::degree_size_type
degree(typename graph_traits<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
       const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &/*graph*/) {
    return in_degree(vertex) + out_degree(vertex);
}
 
//                                      PropertyMapGraph concepts
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename property_map<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>, Sawyer::Boost::vertex_value_t>::type
get(Sawyer::Boost::vertex_value_t, Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return Sawyer::Boost::VertexPropertyMap<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >(graph);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename property_map<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>, Sawyer::Boost::vertex_value_t>::const_type
get(Sawyer::Boost::vertex_value_t, const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return Sawyer::Boost::ConstVertexPropertyMap<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >(graph);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename property_map<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>, Sawyer::Boost::edge_value_t>::type
get(Sawyer::Boost::edge_value_t, Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return Sawyer::Boost::EdgePropertyMap<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >(graph);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename property_map<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>, Sawyer::Boost::edge_value_t>::const_type
get(Sawyer::Boost::edge_value_t, const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return Sawyer::Boost::ConstEdgePropertyMap<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >(graph);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename property_map<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>, Sawyer::Boost::vertex_id_t>::const_type
get(Sawyer::Boost::vertex_id_t, const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return Sawyer::Boost::ConstVertexIdPropertyMap<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >(graph);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename property_map<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>, Sawyer::Boost::edge_id_t>::const_type
get(Sawyer::Boost::edge_id_t, const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return Sawyer::Boost::ConstEdgeIdPropertyMap<const Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >(graph);
}
 
//                                      MutableGraph concepts
 
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_descriptor, bool>
add_edge(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor source,
         typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor target,
         Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator src=graph.findVertex(source);
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator tgt=graph.findVertex(target);
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::EdgeIterator newEdge = graph.insertEdge(src, tgt, E());
    return std::make_pair(newEdge->id(), true);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
void
remove_edge(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor source,
            typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor target,
            Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator src=graph.findVertex(source);
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator tgt=graph.findVertex(target);
    graph.eraseEdges(src, tgt);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
void
remove_edge(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_descriptor edge,
            Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    graph.eraseEdge(graph.findEdge(edge));
}
 
template<class Predicate, class V, class E, class VKey, class EKey, class Alloc>
void
remove_edge_if(Predicate predicate,
               Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::EdgeIterator edge = graph.edges().begin();
    while (edge != graph.edges().end()) {
        if (predicate(edge->id())) {
            edge = graph.eraseEdge(edge);
        } else {
            ++edge;
        }
    }
}
 
template<class Predicate, class V, class E, class VKey, class EKey, class Alloc>
void
remove_out_edge_if(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
                   Predicate predicate,
                   Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator v = graph.findVertex(vertex);
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::EdgeIterator edge = v->outEdges().begin();
    while (edge != v->outEdges().end()) {
        if (predicate(edge->id())) {
            edge = graph.eraseEdge(edge);
        } else {
            ++edge;
        }
    }
}
 
template<class Predicate, class V, class E, class VKey, class EKey, class Alloc>
void
remove_in_edge_if(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
                  Predicate predicate,
                  Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator v = graph.findVertex(vertex);
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::EdgeIterator edge = v->inEdges().begin();
    while (edge != v->inEdges().end()) {
        if (predicate(edge->id())) {
            edge = graph.eraseEdge(edge);
        } else {
            ++edge;
        }
    }
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor
add_vertex(Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.insertVertex(V())->id();
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
void
clear_vertex(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
             Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    graph.clearEdges(graph.findVertex(vertex));
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
void
remove_vertex(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor vertex,
              Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    graph.eraseVertex(graph.findVertex(vertex));
}
 
 
//                                      MutablePropertyGraph concepts
    
template<class V, class E, class VKey, class EKey, class Alloc>
std::pair<typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_descriptor, bool>
add_edge(typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor source,
         typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor target,
         typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::edge_property_type const &pval,
         Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator src=graph.findVertex(source);
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::VertexIterator tgt=graph.findVertex(target);
    typename Sawyer::Container::Graph<V, E, VKey, EKey, Alloc>::EdgeIterator newEdge = graph.insertEdge(src, tgt, pval);
    return std::make_pair(newEdge->id(), true);
}
 
template<class V, class E, class VKey, class EKey, class Alloc>
typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_descriptor
add_vertex(const typename graph_traits<Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> >::vertex_property_type &pval,
           Sawyer::Container::Graph<V, E, VKey, EKey, Alloc> &graph) {
    return graph.insertVertex(pval)->id();
}
 
} // namespace
#endif