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From: drh@romeo.cs.duke.edu (D. Richard Hipp)
Newsgroups: comp.lang.c,gnu.gcc
Subject: Re: How do I cast to "pointer to function returning int" ?
Message-ID: <18834@duke.cs.duke.edu>
Date: 10 Apr 90 13:10:53 GMT
References: <6090.2621f6c2@csv.viccol.edu.au>
Sender: news@duke.cs.duke.edu
Reply-To: drh@romeo.UUCP (D. Richard Hipp)
Organization: Duke University CS Dept.; Durham, NC
Lines: 18

In article <6090.2621f6c2@csv.viccol.edu.au> timcc@csv.viccol.edu.au writes:
>struct foo {
>   char *name ;
>   int (*function) () ;
>   } ;
>
>struct foo foo_table[] = {
>   "bar",	(int * ()) bar,
>   "blurfl",	(int * ()) blurfl,
>   "frobjitz",	(int * ()) frobjitz,
>   } ;

The typecast (int *()) is for "function returning pointer to integer".
To get "pointer to function returning integer" use (int (*)()).

The rule is this: operators on the right hand side bind tighter than
operators on the left hand side.  Thus "()" binds tighter than "*".
You want the "*" to bind closest, so the extra parenthesis are required.