Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.csd.uwm.edu!bionet!ames!uhccux!munnari.oz.au!mimir!hugin!augean!sirius!nt!levels!marwk
From: MARWK@levels.sait.edu.au
Newsgroups: comp.lang.c
Subject: Re: Varargs problem
Message-ID: <1301@levels.sait.edu.au>
Date: 28 Aug 89 15:50:19 GMT
References: <4YxPuc200VsnE_B3Jy@andrew.cmu.edu>
Organization: Sth Australian Inst of Technology
Lines: 16

In article <4YxPuc200VsnE_B3Jy@andrew.cmu.edu>, bobg+@andrew.cmu.edu (Robert Steven Glickstein) writes:
> I wish to extract a variable of type "pointer to function returning int"
> [(int (*) ())] from a varargs parameter list, and I can't. 
> 
> I might be able to do
> 
>     fn = (int (*) ()) va_arg(ap, char *);
> 
> but I don't know how portable this is, ...

I am not an expert, but it seems to me that one can always cast a pointer
to a pointer of another type, so the above is portable - a problem might
occur if one has a FAR pointer cast to a NEAR pointer, but this is architecture
specific anyway.

Ray