# HG changeset patch
# User alpar
# Date 1082231644 0
# Node ID 01fb9da7a3633fd75b9bf8bedb94488724e82fb5
# Parent  3a9a767b841e489d35515578a84e126479de7596
NullMap

diff -r 3a9a767b841e -r 01fb9da7a363 src/work/alpar/rw_nonref_map.cc
--- a/src/work/alpar/rw_nonref_map.cc	Sat Apr 17 19:34:43 2004 +0000
+++ b/src/work/alpar/rw_nonref_map.cc	Sat Apr 17 19:54:04 2004 +0000
@@ -43,6 +43,29 @@
   RefType operator[] (Edge e) const { return RefType(G,e);}  
 };
 
+template<class K,class T>
+class NullMap
+{
+public:
+  typedef K KeyType;
+  typedef T ValueType;
+  
+  class RefType 
+  {
+    ValueType val;
+  public:
+    RefType(ValueType v) : val(v) { }   
+    operator ValueType() const { return val; }
+    ValueType operator = (ValueType v) const { return val; }
+  };
+  
+private:
+  ValueType val;
+public:
+  NullMap(ValueType v) : val(v) { }
+  RefType operator[] (KeyType e) const { return RefType(v);}  
+};
+
 int main()
 {
   typedef SmartGraph Graph;