Looping dependencies

Posted by Luca Billi on Feb 05, 2012; 8:26pm
URL: http://quantlib.414.s1.nabble.com/Looping-dependencies-tp13460.html

I noticed that the current implementation of LazyObjects generates
infinite recursions
in the case the dependency hierarchy among Observer/Observable objects
contains loops.

A suggestion to break the infinite recursion is to replace the update()
method as follows:

 void LazyObject::update() {

      if (!frozen_&& calculated_){
        //
        // Set calculated_=false before calling notifyObservers()
        //
        calculated_ = false;

        notifyObservers();
      }

      calculated_ = false;
 }


Luca

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