Hi Otto, 2016-10-18 5:01 GMT-03:00 Otto Behrens <o...@finworks.biz>:
> +1 for the visitor. What would be nice is to generate methods in the > form #visit<Class Name>: for all classes in a given hierarchy (eg > Magritte's MAVisitor). The default implementation of such a method > would be to call #visit<My Super Class name>: > > We have been using state machines for a long time and have built > generators for it (on a previous project, for which I do not have the > code). I still think that is a useful idea. It is difficult for the > code generator to maintain changes in the generated code with changes > in the "spec". Will you then define a DSL for the state machine? > > Do you mean internal or embedded DSL? I am open to write an DSL if facilitates the job, the thing with the Trevor's paper is that he defines 6 implementations of FSM's (and in each implementation he considers several issues leading to sub-implementations) so I would like a DSL which let me express different implementations for the same FSM. Plus there are FSM implementations out there: HotDraw, Connectors, MIDIInputParser, XMIReader, SState, etc. I think a "correct" DSL would enable to define any of them right? The approach I am using now is a parametrized code generator, using templates (not in the form of T4 templates), so it's a long way. Maybe Helvetia could help? > On Tue, Oct 18, 2016 at 9:29 AM, Julien Delplanque <jul...@tamere.eu> > wrote: > > Hello, > > > > A generator for the visitor design pattern: > > - Generate methods in visited objects: VisitedObject>>#accept: (with the > > selector name configurable) > > - Generate empty methods (or methods with a "self > subclassResponsability" if > > an abstract visitor is generated) > > called in #accept: methods of VisitedObjects in the Visitor i.e > > Visitor>>#acceptVisitedObject: (with the selector > > name configurable again). > > > > Each time this design pattern has to be used, it is annoying to write by > > hand all these methods. > > > > Regards, > > > > Julien > > > > > > On 18/10/16 07:24, Hernán Morales Durand wrote: > >> > >> Hi guys, > >> > >> I am writing a code generator, doing a few iterations right now. > >> I want your opinion, which most useful thing would you like to be > >> generated > >> automatically? It could be a pattern, an idiom, another language... > >> > >> For example my own wish (roadmap) list: > >> > >> - A "settings framework" settings class generator. > >> - A state machine generator (based in the excellent paper of Trevor P. > >> Hopkins) > >> - A Spec UI generator. > >> > >> Let me know your thoughts. > >> > >> Cheers, > >> > >> Hernán > >> > > > > > >
