Added boost header

test/external/boost/graph/exterior_property.hpp

@@ -0,0 +1,117 @@
+// (C) Copyright 2007-2009 Andrew Sutton
+//
+// Use, modification and distribution are subject to the
+// Boost Software License, Version 1.0 (See accompanying file
+// LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_GRAPH_EXTERIOR_PROPERTY_HPP
+#define BOOST_GRAPH_EXTERIOR_PROPERTY_HPP
+
+#include <vector>
+#include <boost/graph/property_maps/container_property_map.hpp>
+#include <boost/graph/property_maps/matrix_property_map.hpp>
+
+namespace boost {
+namespace detail {
+    // The vector matrix provides a little abstraction over vector
+    // types that makes matrices easier to work with. Note that it's
+    // non-copyable, meaning you should be passing it by value.
+    template <typename Value>
+    struct vector_matrix
+    {
+        typedef std::vector<Value> container_type;
+        typedef std::vector<container_type> matrix_type;
+
+        typedef container_type value_type;
+        typedef container_type& reference;
+        typedef const container_type const_reference;
+        typedef container_type* pointer;
+        typedef typename matrix_type::size_type size_type;
+
+        // Instantiate the matrix over n elements (creates an nxn matrix).
+        // The graph has to be passed in order to ensure the index maps
+        // are constructed correctly when returning indexible elements.
+        inline vector_matrix(size_type n)
+            : m_matrix(n, container_type(n))
+        { }
+
+        inline reference operator [](size_type n)
+        { return m_matrix[n]; }
+
+        inline const_reference operator [](size_type n) const
+        { return m_matrix[n]; }
+
+        matrix_type m_matrix;
+    };
+} /* namespace detail */
+
+/**
+ * The exterior_property metafunction defines an appropriate set of types for
+ * creating an exterior property. An exterior property is comprised of a both
+ * a container and a property map that acts as its abstraction. An extension
+ * of this metafunction will select an appropriate "matrix" property that
+ * records values for pairs of vertices.
+ *
+ * @todo This does not currently support the ability to define exterior
+ * properties for graph types that do not model the IndexGraph concepts. A
+ * solution should not be especially difficult, but will require an extension
+ * of type traits to affect the type selection.
+ */
+template <typename Graph, typename Key, typename Value>
+struct exterior_property
+{
+    typedef Key key_type;
+    typedef Value value_type;
+
+    typedef std::vector<Value> container_type;
+    typedef container_property_map<Graph, Key, container_type> map_type;
+
+    typedef detail::vector_matrix<Value> matrix_type;
+    typedef matrix_property_map<Graph, Key, matrix_type> matrix_map_type;
+
+private:
+    exterior_property() { }
+    exterior_property(const exterior_property&) { }
+};
+
+/**
+ * Define a the container and property map types requried to create an exterior
+ * vertex property for the given value type. The Graph parameter is required to
+ * model the VertexIndexGraph concept.
+ */
+template <typename Graph, typename Value>
+struct exterior_vertex_property
+{
+    typedef exterior_property<
+            Graph, typename graph_traits<Graph>::vertex_descriptor, Value
+        > property_type;
+    typedef typename property_type::key_type key_type;
+    typedef typename property_type::value_type value_type;
+    typedef typename property_type::container_type container_type;
+    typedef typename property_type::map_type map_type;
+    typedef typename property_type::matrix_type matrix_type;
+    typedef typename property_type::matrix_map_type matrix_map_type;
+};
+
+/**
+ * Define a the container and property map types requried to create an exterior
+ * edge property for the given value type. The Graph parameter is required to
+ * model the EdgeIndexGraph concept.
+ */
+template <typename Graph, typename Value>
+struct exterior_edge_property
+{
+    typedef exterior_property<
+            Graph, typename graph_traits<Graph>::edge_descriptor, Value
+        > property_type;
+    typedef typename property_type::key_type key_type;
+    typedef typename property_type::value_type value_type;
+    typedef typename property_type::container_type container_type;
+    typedef typename property_type::map_type map_type;
+    typedef typename property_type::matrix_type matrix_type;
+    typedef typename property_type::matrix_map_type matrix_map_type;
+};
+
+} /* namespace boost */
+
+#endif