Re: Magritte validation problem with MABooleanDescription

That part just tries to avoid to go into recursion if a described object refers to another object that descriptions refer back to the original object. That was requested at some point in the past, but I never dependent on that myself. Lukas On 11 October 2010 11:49, Nick Ager <nick.ager(a)gmail.com> wrote: > HI Lukas, > > On 11 October 2010 08:32, Lukas Renggli <renggli(a)gmail.com> wrote: >> >> Wow, that's a very nasty bug. Amazing that this hasn't hit anybody >> before. Looks like this could happen quite common in systems like >> Pier, not only with MABooleanDescription instances. >> >>  http://code.google.com/p/magritte-metamodel/issues/detail?id=7 >> >> The validation code is really ugly. And likely this bug was introduced >> when trying to support the validation for recursive structures. I >> would be happy if someone could rewrite that code? (also get rid of >> these nested, resumable exceptions). > > I'm happy to help, especially as I'd like a fix for the code I'm > developing. > However I'm struggling to understand the intent of the some of the code for > example I don't understand the intent behind the use of object and previous > in MAGraphVisitor>>#use:during > MAGraphVisitor>>#use: anObject during: aBlock > | previous | > previous := object. object := anObject. > aBlock ensure: [ object := previous ] > _______________________________________________ > Magritte, Pier and Related Tools ... > https://www.iam.unibe.ch/mailman/listinfo/smallwiki > -- Lukas Renggli www.lukas-renggli.ch