[Libre-soc-bugs] [Bug 1094] insndb instruction database visitor-walker is needed

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=1094

--- Comment #131 from Dmitry Selyutin <ghostmansd at gmail.com> ---
https://libre-soc.org/irclog/%23libre-soc.2023-06-12.log.html#t2023-06-12T12:07:42

Two ideas:
1. Paths or indices can be nodes as well, and be visitable. This allows to
solve the issue on how and what to pass to visitor method.
2. We should support loose matches for visitor handlers, likely traversing MRO.
The visitor below handles any Dict in a generic way but has a special logic for
Operands:

class MagicVisitor(Visitor):
    @visitmethod(Operands)
    def Operands(self, node):
        print("Oh and this is Operands node!", node)
        yield node

    @visitmethod(Dict)
    def Dict(self, node):
        print(node)
        yield node

And basically the default __call__ becomes @visitormethod(object)!

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