structr/structr — pull request #30 by serioushaircut (2012-11-07 08:50:57+00:00)
Title: Started visitor pattern for  resource combination

to get rid of the instance_of cascades in the resource.tryCombineWith(resource) assembly to gain some type and definition safety.

to be done: make all resource classes visitable by their specific visitors, introduce proper visitor hierarchy in the same fashion as for the visitable UuidResource (visitable) and TypeResourceVisitor