InDegMap< GR > Class Template Reference

Detailed Description

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

This map returns the in-degree of a node. Once it is constructed, the degrees are stored in a standard NodeMap, so each query is done in constant time. On the other hand, the values are updated automatically whenever the digraph changes.

Warning

Besides addNode() and addArc(), a digraph structure may provide alternative ways to modify the digraph. The correct behavior of InDegMap is not guarantied if these additional features are used. For example, the functions changeSource(), changeTarget() and reverseArc() of ListDigraph will not update the degree values correctly.

See Also

OutDegMap

#include <lemon/maps.h>

Inherits ObserverBase< GR, GR::Arc >.

Public Types
typedef GR	Graph
	The graph type of InDegMap.
typedef Digraph::Node	Key
	The key type.
typedef int	Value
	The value type.

Public Member Functions
	InDegMap (const Digraph &graph)
	Constructor.
int	operator[] (const Key &key) const

Constructor & Destructor Documentation

InDegMap ( const Digraph &  graph )

inlineexplicit

Constructor for creating an in-degree map.

Member Function Documentation

int operator[] ( const Key &  key ) const

inline

Gives back the in-degree of a Node.