Changeset 2248:1ac928089d68 in lemon-0.x for lemon/maps.h

Timestamp:

10/17/06 13:01:16 (18 years ago)

Author:

Balazs Dezso

Branch:

default

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@2998

Message:

SimpleMap? and SimpleWriteMap?

• Trivial adaptors, but they are useful in some case

Some combined maps will be reference map if the first
template parameter map is reference map or not. If I want
to give a refernce map as first map but there is a non
reference map parameter then I should wrap my first map
to a regular read-write map.

File:

• lemon/maps.h (modified) (1 diff)

lemon/maps.h

@@ -288 +288 @@
   }
 
+  ///Simple wrapping of the map
+
+  ///This \ref concept::ReadMap "read only map" returns the simple
+  ///wrapping of the given map. Sometimes the reference maps cannot be
+  ///combined with simple read maps. This map adaptor wraps the given
+  ///map to simple read map.
+  template<typename M> 
+  class SimpleMap : public MapBase<typename M::Key, typename M::Value> {
+    const M& m;
+
+  public:
+    typedef MapBase<typename M::Key, typename M::Value> Parent;
+    typedef typename Parent::Key Key;
+    typedef typename Parent::Value Value;
+
+    ///Constructor
+    SimpleMap(const M &_m) : m(_m) {};
+    Value operator[](Key k) const {return m[k];}
+  };
+
+  ///Simple writeable wrapping of the map
+
+  ///This \ref concept::ReadMap "read only map" returns the simple
+  ///wrapping of the given map. Sometimes the reference maps cannot be
+  ///combined with simple read-write maps. This map adaptor wraps the
+  ///given map to simple read-write map.
+  template<typename M> 
+  class SimpleWriteMap : public MapBase<typename M::Key, typename M::Value> {
+    M& m;
+
+  public:
+    typedef MapBase<typename M::Key, typename M::Value> Parent;
+    typedef typename Parent::Key Key;
+    typedef typename Parent::Value Value;
+
+    ///Constructor
+    SimpleWriteMap(M &_m) : m(_m) {};
+    Value operator[](Key k) const {return m[k];}
+    void set(Key k, const Value& c) { m.set(k, c); }
+  };
+
   ///Sum of two maps