Notifying structures of editions

Hi, When editing a structure, accessors are called via Magritte but there is no way for the structure to reinitialize itself before any accessor is called, or to re-establish its invariant after all accessors have been called. I thought I'd wrap PRCommand>>doExecute with something like self structure willEdit and self structure didEdit, would that make sense? I also saw PRStructure>>validateCommand which shouldn't modify the structure, but in my case (Citezen) validating means parsing that takes time and I'd prefer not to repeat that work when committing the edition to the structure. I think writing this helped me see a solution: - validation does the heavy parsing and stores result in (an adhoc subclass of) the edit command - executing the command stores parsed data in the structure and resets the final data - a lazy accessor for the final data builds it and ditches the parsed data hopefully that was clear… if you have suggestions… -- Damien Pollet type less, do more [ | ] http://typo.cdlm.fasmz.org