# HG changeset patch
# User alpar
# Date 1082931979 0
# Node ID 2d0cccf7cc949a36a1de2983bac8399adeea70d0
# Parent  cb377609cf1d50be72339861acbe2a765824912e
Some bugfixes.
Some more docs.

diff -r cb377609cf1d -r 2d0cccf7cc94 src/work/alpar/list_graph.h
--- a/src/work/alpar/list_graph.h	Sun Apr 25 20:16:16 2004 +0000
+++ b/src/work/alpar/list_graph.h	Sun Apr 25 22:26:19 2004 +0000
@@ -15,7 +15,7 @@
 
   class SymListGraph;
 
-  ///A smart graph class.
+  ///A list graph class.
 
   ///This is a simple and fast erasable graph implementation.
   ///
@@ -723,13 +723,18 @@
   };
   
 
-  ///A smart graph class.
+  ///A graph class containing only nodes.
 
-  ///This is a simple and fast erasable graph implementation.
+  ///This class implements a graph structure without edges.
+  ///The most useful application of this class is to be the node set of an
+  ///\ref EdgeSet class.
   ///
   ///It conforms to the graph interface documented under
-  ///the description of \ref GraphSkeleton.
-  ///\sa \ref GraphSkeleton.
+  ///the description of \ref GraphSkeleton with the exception that you cannot
+  ///add (or delete) edges. The usual edge iterators are exists, but they are
+  ///always \ref INVALID.
+  ///\sa \ref GraphSkeleton
+  ///\se \ref EdgeSet
   class NodeSet {
 
     //Nodes are double linked.
@@ -1114,11 +1119,20 @@
 
 
 
-  ///This is a simple and fast erasable graph implementation.
+  ///Graph structure using a node set of another graph.
+
+  ///This structure can be used to establish another graph over a node set
+  /// of an existing one. The node iterator will go through the nodes of the
+  /// original graph, and the NodeMap's of both graphs will convert to
+  /// each other.
+  ///
+  ///\param GG The type of the graph which shares its node set with this class.
+  ///Its interface must conform with \ref GraphSkeleton.
   ///
   ///It conforms to the graph interface documented under
   ///the description of \ref GraphSkeleton.
   ///\sa \ref GraphSkeleton.
+  ///\sa \ref NodeSet.
   template<typename GG>
   class EdgeSet {
 
@@ -1191,11 +1205,11 @@
     
   public:
 
-    EdgeSet(const NodeGraphType &_G) : G(_G),
-				       nodes(_G), edges(),
-				       first_free_edge(-1) {}
+    EdgeSet(NodeGraphType &_G) : G(_G),
+				 nodes(_G), edges(),
+				 first_free_edge(-1) { }
     EdgeSet(const EdgeSet &_g) : G(_g.G), nodes(_g.G), edges(_g.edges),
-				 first_free_edge(_g.first_free_edge) {}
+				 first_free_edge(_g.first_free_edge) { }
     
     ~EdgeSet()
     {
@@ -1287,15 +1301,15 @@
 	first_free_edge = edges[n].next_in;
       }
       
-      edges[n].tail = u.n; edges[n].head = v.n;
+      edges[n].tail = u; edges[n].head = v;
 
-      edges[n].next_out = nodes[u.n].first_out;
-      if(nodes[u.n].first_out != -1) edges[nodes[u.n].first_out].prev_out = n;
-      edges[n].next_in = nodes[v.n].first_in;
-      if(nodes[v.n].first_in != -1) edges[nodes[v.n].first_in].prev_in = n;
+      edges[n].next_out = nodes[u].first_out;
+      if(nodes[u].first_out != -1) edges[nodes[u].first_out].prev_out = n;
+      edges[n].next_in = nodes[v].first_in;
+      if(nodes[v].first_in != -1) edges[nodes[v].first_in].prev_in = n;
       edges[n].prev_in = edges[n].prev_out = -1;
 	
-      nodes[u.n].first_out = nodes[v.n].first_in = n;
+      nodes[u].first_out = nodes[v].first_in = n;
 
       Edge e; e.n=n;
 
@@ -1373,7 +1387,7 @@
     public:
       NodeIt() : NodeGraphType::NodeIt() { }
       NodeIt (Invalid i) : NodeGraphType::NodeIt(i) {}
-      NodeIt(const EdgeSet& _G) : NodeGraphType::Node(_G.G) { }
+      NodeIt(const EdgeSet& _G) : NodeGraphType::NodeIt(_G.G) { }
       NodeIt(const typename NodeGraphType::NodeIt &n)
 	: NodeGraphType::NodeIt(n) {}
       operator Node() { return Node(*this);}
@@ -1451,7 +1465,7 @@
 
       ///\todo It can copy between different types.
       ///
-      template<typename TT> friend class NodeMap;
+      template<typename TT>
       NodeMap(const typename NodeGraphType::NodeMap<TT> &m)
 	: NodeGraphType::NodeMap<T>(m) { }
     };
diff -r cb377609cf1d -r 2d0cccf7cc94 src/work/alpar/list_graph_demo.cc
--- a/src/work/alpar/list_graph_demo.cc	Sun Apr 25 20:16:16 2004 +0000
+++ b/src/work/alpar/list_graph_demo.cc	Sun Apr 25 22:26:19 2004 +0000
@@ -120,5 +120,32 @@
 		<< " sm=" << sm[e] << "\n";
     
   }
+
+  // Tests for NodeSet and EdgeSet
+  
+  {
+    NodeSet N;
+    
+    typedef EdgeSet<NodeSet> ES;
+    
+    ES E(N);
+    ES F(N);
+    for(int i=0;i<10;i++) G.addNode();
+    
+    for(ES::NodeIt n(E);E.valid(n);E.next(n))
+      for(ES::NodeIt m(E);E.valid(m);E.next(m))
+	if(n!=m) F.addEdge(n,m);
+    for(ES::NodeIt n(F);F.valid(n);F.next(n))
+      for(ES::NodeIt m(F);F.valid(m);F.next(m))
+	if(n<m) F.addEdge(n,m);
+    
+
+    NodeSet::NodeMap<int> nm1(N);
+    ES::NodeMap<int> nm2(E);
+    ES::EdgeMap<int> eme(E);
+    ES::EdgeMap<int> emf(F);
+    
+       
+  }
   
 }