The SummaryInfoVisitorBase Class
Defined in: Keyview_SummaryInformation.hpp
The SummaryInfoVisitorBase
class is an abstract base class that operates with the SummaryInfoItem::
apply_visitor function. You use the SummaryInfoVisitorBase
class by defining a class that inherits from it, implementing the required pure virtual member functions to handle each of the possible summary information types. You then call apply_visitor with an instance of your new class. The apply_visitor function ensures that the correct member function of your visitor is classed with the summary information item in its original type.