SmartGraph Class Reference

Detailed Description

SmartGraph is a simple and fast graph implementation. It is also quite memory efficient but at the price that it does not support node and edge deletion (except for the Snapshot feature).

This type fully conforms to the Graph concept and it also provides some additional functionalities. Most of its member functions and nested classes are documented only in the concept class.

This class provides constant time counting for nodes, edges and arcs.

See Also

concepts::Graph

SmartDigraph

#include <lemon/smart_graph.h>

Inherits GraphExtender< Base >.

Classes
class	Snapshot
	Class to make a snapshot of the graph and to restore it later. More...

Public Member Functions
	SmartGraph ()
Node	addNode ()
	Add a new node to the graph.
Edge	addEdge (Node u, Node v)
	Add a new edge to the graph.
bool	valid (Node n) const
	Node validity check.
bool	valid (Edge e) const
	Edge validity check.
bool	valid (Arc a) const
	Arc validity check.
void	clear ()
	Clear the graph.
void	reserveNode (int n)
	Reserve memory for nodes.
void	reserveEdge (int m)
	Reserve memory for edges.

Private Member Functions
	SmartGraph (const SmartGraph &)
	Graphs are not copy constructible. Use GraphCopy instead.
void	operator= (const SmartGraph &)
	Assignment of a graph to another one is not allowed. Use GraphCopy instead.

Constructor & Destructor Documentation

SmartGraph ( )

inline

Constructor.

Member Function Documentation

Node addNode ( )

inline

This function adds a new node to the graph.

Returns

The new node.

Edge addEdge ( Node  u, Node  v  )

inline

This function adds a new edge to the graph between nodes u and v with inherent orientation from node u to node v.

Returns

The new edge.

bool valid ( Node  n ) const

inline

This function gives back true if the given node is valid, i.e. it is a real node of the graph.

Warning

A removed node (using Snapshot) could become valid again if new nodes are added to the graph.

bool valid ( Edge  e ) const

inline

This function gives back true if the given edge is valid, i.e. it is a real edge of the graph.

Warning

A removed edge (using Snapshot) could become valid again if new edges are added to the graph.

bool valid ( Arc  a ) const

inline

This function gives back true if the given arc is valid, i.e. it is a real arc of the graph.

Warning

A removed arc (using Snapshot) could become valid again if new edges are added to the graph.

void clear ( )

inline

This function erases all nodes and arcs from the graph.

void reserveNode ( int  n )

inline

Using this function, it is possible to avoid superfluous memory allocation: if you know that the graph you want to build will be large (e.g. it will contain millions of nodes and/or edges), then it is worth reserving space for this amount before starting to build the graph.

See Also

reserveEdge()

void reserveEdge ( int  m )

inline

Using this function, it is possible to avoid superfluous memory allocation: if you know that the graph you want to build will be large (e.g. it will contain millions of nodes and/or edges), then it is worth reserving space for this amount before starting to build the graph.

See Also

reserveNode()