SmartEdgeSet< GR > Class Template Reference

Detailed Description

template<typename GR>
class lemon::SmartEdgeSet< GR >

This structure can be used to establish another graph over a node set of an existing one. This class uses the same Node type as the underlying graph, and each valid node of the original graph is valid in this arc set, therefore the node objects of the original graph can be used directly with this class. The node handling functions (id handling, observing, and iterators) works equivalently as in the original graph.

Parameters

GR	The type of the graph which shares its node set with this class. Its interface must conform to the Digraph or Graph concept.

This implementation is slightly faster than the ListEdgeSet, because it uses continuous storage for edges and it uses just single-linked lists for enumerate incident edges. Therefore the edges cannot be erased from the edge sets.

This class fully conforms to the Graph concept. It provides only linear time counting for nodes, edges and arcs.

Warning

If a node is erased from the underlying graph and this node is incident to one edge in the edge set, then the edge set is invalidated, and it cannot be used anymore. The validity can be checked with the valid() member function.

#include <lemon/edge_set.h>

Inherits EdgeSetExtender< Base >.

Public Member Functions
	SmartEdgeSet (const GR &graph)
	Constructor of the EdgeSet. More...
Edge	addEdge (const Node &u, const Node &v)
	Add a new edge to the graph. More...
bool	valid () const
	Validity check. More...

Constructor & Destructor Documentation

SmartEdgeSet ( const GR &  graph )

inline

Constructor of the EdgeSet.

Member Function Documentation

Edge addEdge ( const Node &  u, const Node &  v  )

inline

Add a new edge to the graph with node u and node v endpoints.

Returns

The new edge.

bool valid ( ) const

inline

This functions gives back false if the EdgeSet is invalidated. It occurs when a node in the underlying graph is erased and it is not isolated in the EdgeSet.