From:	Erik Max Francis <max AT alcyone DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: calling foo(void (*func)(__dpmi_regs *))....
Date:	Tue, 18 Nov 1997 09:09:52 -0800
Organization:	Alcyone Systems
Lines:	33
Message-ID:	<3471CBE0.72E4A13@alcyone.com>
References:	<19971118004901 DOT TAA11968 AT ladder01 DOT news DOT aol DOT com> <34714fe2 DOT 992331 AT news DOT uni-duisburg DOT de>
NNTP-Posting-Host:	newton.alcyone.com
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Michael Mauch wrote:

> > Okay, i got this code out of a mouse vector (or whatever you call
> > that 0x33
> >  thing) example in DJGPP's faq.  I copied in the code, looked up all
> > the
> >  functions (i like to know what i'm doing), and tried calling it
> > like:
> >
> > foo(theVector());
> 
> What's foo, what's theVector()? "That 0x33 thing" is not very helpful
> for guessing what you're trying to do.

I'm not specifically familiar with what the original poster is trying to
do, but it looks like he's trying to call a function (`foo') with a
function _pointer_ (`theVector') as its argument.  In this case, the
statement he wrote above is not correct -- he is _invoking_ `theVector'
(which presumably takes arguments and thus is giving an error).  What he
meant is this:

    fo(theVector);

The name of a function decays to a pointer to it, which is what the
original poster was looking for.

-- 
         Erik Max Francis, &tSftDotIotE / mailto:max AT alcyone DOT com
                       Alcyone Systems / http://www.alcyone.com/max/
  San Jose, California, United States / icbm://+37.20.07/-121.53.38
                                     \
   "Since when can wounded eyes see / If we weren't who we were"
                                   / Joi

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