Re: [Lilypond-auto] Issue 4365 in lilypond: Patch: Add ly_is_smob<T>(S) to check if S is a smob of type T.

[lilypond]

Comment #5 on issue 4365 by address@hidden: Patch: Add  
ly_is_smob<T>(S) to check if S is a smob of type T.
https://code.google.com/p/lilypond/issues/detail?id=4365

Thanks for the update.  My problems with unsmob() mentioned above were  
primarily due to late-night brain fog.

While debugging, I found evidence that is_smob() never needed dynamic  
casting in practice because the overridden unsmob() functions that it  
called already performed the conversion.

I'm going to attack this afresh, but touching unsmob too, and using a sed  
script for most of the work.  I plan to create both unsmob<> and  
dynamic_unsmob<> for clarity.

Thanks for saying you prefer is_smob to ly_is_smob.  I do too, but I looked  
around and thought I'd better use ly_.

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