Re: [Lilypond-auto] Issue 4564 in lilypond: make Grob an abstract class

[lilypond]

Comment #1 on issue 4564 by address@hidden: make Grob an abstract class
https://code.google.com/p/lilypond/issues/detail?id=4564

Deriving grob interface classes from Grob would appear to lead to grobs  
getting derived in turn from multiple interface classes.  Which would imply  
virtual inheritance in order to avoid multiple Grob base classes.  And so  
on: basically this looks like you want to end up using the whole multiple  
inheritance machinery of C++.  Which would throw a complete spanner into  
extending the grob/interface hierarchies from Scheme and probably turn out  
tricky with respect to smobification.

So maybe put your ultimate goals out to discussion before investing too  
much work in it?

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