[PD-dev] multiple $arg-expansion

Hans-Christoph Steiner hans at eds.org
Sun Jan 15 17:03:06 CET 2006


On Jan 14, 2006, at 2:16 PM, IOhannes m zmoelnig wrote:

> IOhannes m zmoelnig wrote:
>>>
>>> caveat: the A_DOLLARSYM still has to start with
>>> "$[0-9]". this is the way, pd determines whether a
>>> given symbol should be $-expanded or not. furthermore,
>>> the leading $ is usually stripped by pd.
>>> e.g. if you type [$1-bar-$2], the symbol "1-bar-$2" is
>>> stored as A_DOLLARSYM. this means that the beginning of
>>> the dollarsymbol always has to be expanded.
>>> furthermore,  [bar-$2] will _never_ be expanded (since
>>> pd thinks it is an ordinary symbol).
>>>
>>> i didn't dare to change this behaviour since
>>> SETDOLLARSYM() and binbuf_realizedollsym() are exposed
>>> in m_pd.h and probably used in externals which would
>>> then break.
>>> however, whenever this might change,
>>> binbuf_expanddollsym() is prepared (just need to "#if 1")
>
> actually it is binbuf_realizedollsym() that is prepared.
>
> however, i did some quick greps over the entire CVS, and it seems that  
> if we want to get rid of the restriction that A_DOLLARSYM has to start  
> with "$" there are only very few "external" files that need to be  
> modified, namely:
>  externals/iemlib/src/iemlib2/iem_pbank_csv.c
>  externals/miXed/shared/common/port.c
>  externals/miXed/shared/common/lex.c
>  externals/grill/flext/source/flattr_ed.cpp
>  externals/grill/flext/source/flatom_pr.cpp
>
> so that's only 3 libraries. i guess i will do it (if nobody finds a  
> convincing argument to stop all this)

Sounds good to me.  Just an FYI: externals/grill is just a mirror of  
Thomas' repository, so you have to submit a patch to him rather than  
committing the changes to CVS.

.hc
________________________________________________________________________ 
____

            "The arc of history bends towards justice."
                                            - Dr. Martin Luther King, Jr.





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