[Cython] Visitor patterns and Python 2.4

[Dag Sverre Seljebotn]

> (2) If you use decorators then you'll have to implement them in Cython
> so that compiling Cython itself using Cython will work.   That seems
> like good motivation.
>   
And not too hard either. The funny thing is that I'd really want to have 
decorators available for writing such support :-)

Which brings up the question of a parser...will raise it in a different 
thread.

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Dag Sverre