[GRASS-user] Question with Python-SWIG example [SEC=UNCLASSIFIED]

[Andrew MacIntyre]

> > That seems to be what the SWIG Pointer Library function ptrcast() is
> > for,
> > according to http://www.swig.org/Doc1.1/HTML/Typemaps.html, so
> > something like (in Python):
> >
> > 	import GrassMod
> > 	pCELL = GrassMod.Returns_CELLptr()
> > 	pvoid = GrassMod.castptr(pCELL, "void *")
> 
> above line should read:
>  	pvoid = GrassMod.ptrcast(pCELL, "void *")
> 
> >  	result = GrassMod.Takes_voidptr(pvoid)
> >
> > (substitute the correct name of the GRASS SWIG module for
"GrassMod")

Just noticed that the docco I referenced was for SWIG 1.1, so the above 
is probably moot.

However, the 2nd para of s5.3.2 of the SWIG 1.3 documentation at 
http://www.swig.org/Doc1.3/SWIG.html#SWIG_nn17 states 
	"Like C, void * matches any kind of pointer." 
which suggests to me that the casts from CELL*/FCELL*/DCELL to void* 
would be implicitly performed anyway - be worth testing.

Cheers,
Andrew.

-------------------------> "These thoughts are mine alone!" <---------
Andrew MacIntyre           Operations Branch
tel:   +61 2 6219 5356     Communications Infrastructure Division
fax:   +61 2 6253 3277     Australian Communications & Media Authority
email: andrew.macintyre at acma.gov.au            http://www.acma.gov.au/


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