• Sébastien Villemot's avatar
    Add copy constructors / assignment operators for the DataTree class hierarchy · f2cf86b7
    Sébastien Villemot authored
    In particular, it is necessary to turn back DataTree::AddVariable() into a
    non-virtual method, because it is called from DataTree's constructor. Enforcing
    the absence of leads/lags is now done using a new boolean DataTree::is_static.
    Take advantage of the new copy constructor for handling
    PlannerObjectiveStatement more elegantly.
    Unfortunately it is not possible to implement *move* constructor / assigment
    operators, because the reference ExprNode::datatree is not mutable.