Changeset 94:a4688e4138ec in lemon-main for lemon/concepts

Timestamp:

03/18/08 13:57:15 (17 years ago)

Author:

Peter Kovacs <kpeter@…>

Branch:

default

Phase:

public

Message:

Fixes in the map concepts

• Now Value type needn't be default constructible.
• Extend the test file to check this.

File:

• lemon/concepts/maps.h (modified) (3 diffs)

lemon/concepts/maps.h

@@ -48 +48 @@
 
       /// Returns the value associated with the given key.
-
-      /// Returns the value associated with the given key.
-      /// \bug Value shouldn't need to be default constructible. 
-      Value operator[](const Key &) const { return Value(); }
+      Value operator[](const Key &) const { 
+        return *static_cast<Value *>(0);
+      }
 
       template<typename _ReadMap>
@@ -127 +126 @@
 
       /// Returns the value associated with the given key.
-      Value operator[](const Key &) const { return Value(); }
+      Value operator[](const Key &) const { 
+        return *static_cast<Value *>(0);
+      }
 
       /// Sets the value associated with the given key.
@@ -161 +162 @@
       typedef CR ConstReference;
 
-    protected:
-      Value tmp;
     public:
 
       /// Returns a reference to the value associated with the given key.
-      Reference operator[](const Key &) { return tmp; }
+      Reference operator[](const Key &) { 
+        return *static_cast<Value *>(0);
+      }
 
       /// Returns a const reference to the value associated with the given key.
-      ConstReference operator[](const Key &) const { return tmp; }
+      ConstReference operator[](const Key &) const {
+        return *static_cast<Value *>(0);
+      }
 
       /// Sets the value associated with the given key.