Hi Otto, 2016-10-18 5:01 GMT-03:00 Otto Behrens <otto@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 <julien@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