Changes in src/Patterns/Cacheable.hpp [adc42b:c72112]

File:

• src/Patterns/Cacheable.hpp (modified) (8 diffs)

src/Patterns/Cacheable.hpp

@@ -28 +28 @@
         owner(_owner)
         {}
-      virtual T getValue()=0;
+      virtual T& getValue()=0;
       virtual void invalidate()=0;
       virtual bool isValid()=0;
@@ -46 +46 @@
         {}
 
-      virtual T getValue(){
+      virtual T& getValue(){
         // set the state to valid
         State::owner->switchState(State::owner->validState);
@@ -72 +72 @@
         {}
 
-      virtual T getValue(){
+      virtual T& getValue(){
         return content;
       }
@@ -100 +100 @@
         {}
 
-      virtual T getValue(){
+      virtual T& getValue(){
         ASSERT(0,"Cannot get a value from a Cacheable after it's Observable has died");
         // we have to return a grossly invalid reference, because no value can be produced anymore
@@ -134 +134 @@
     void subjectKilled(Observable *subject);
   private:
-
     void switchState(state_ptr newState);
 
@@ -144 +143 @@
 
     Observable *owner;
-
     boost::function<T()> recalcMethod;
 
@@ -221 +219 @@
 
     const bool isValid() const;
-    const T operator*() const;
+    const T& operator*() const;
 
     // methods implemented for base-class Observer
@@ -237 +235 @@
 
   template<typename T>
-  const T Cacheable<T>::operator*() const{
+  const T& Cacheable<T>::operator*() const{
     return recalcMethod();
   }