complex declarations

From	Robbie Brown <dac@nomail.invalid>
Newsgroups	comp.lang.c
Subject	complex declarations
Date	2014-03-04 20:18 +0000
Organization	A noiseless patient Spider
Message-ID	<lf5cdv$dll$1@dont-email.me> (permalink)

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I have the following code

/* declare signal as function (int, pointer to function (int) returning 
void) returning pointer to function (int) returning void */

void (*signal(int, void (*)(int)) ) (int);

/* simplify things a bit using a typedef */
typedef void (*fptr)(int);

int main(void){

   /* declare and define function that takes int and returns void */
   void foobar(int x){
     printf("%s%d\n", "x in foobar is ", x);
   }

   /* define signal using the typedef, compiles */
   fptr signal(int x, fptr y){
     return NULL;
   }

   /* What I'd like to do now is to replace the fptr typedef with the
      pre typedef type if that makes sense.
      Why?  because it helps my understanding */

   /* Here I can say, void y(), void (y)(), void (*y)(), void y(int),
      void(y)(int) void (*y)(int) for the second arg and they all
      compile */

   fptr signal2(int x, void (*y)(int) ){
      NULL;
   }

   /* finally I want to do something like
      return a pointer to a function taking int and returning void
      but I just can't figure out how to do it. I've tried
      void (*)(int), void (int), (void (*) (int)) etc etc without
      success */

   /* can't get this to compile in any way */
   //void (*x) (int) signal3(int x, void (*y)(int) ){
   //  return  NULL;
   //}

}


How do I code signal3 to completely get rid of my dependence on the 
typedef. Once again, the only reason I want to do this is because I can 
(hopefully)

Thanks

-- 
Rob - not floundering, fishing

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complex declarations Robbie Brown <dac@nomail.invalid> - 2014-03-04 20:18 +0000
  Re: complex declarations James Kuyper <jameskuyper@verizon.net> - 2014-03-04 15:49 -0500
    Re: complex declarations James Kuyper <jameskuyper@verizon.net> - 2014-03-04 16:06 -0500
      Re: complex declarations Robbie Brown <dac@nomail.invalid> - 2014-03-05 12:18 +0000
        Re: complex declarations "BartC" <bc@freeuk.com> - 2014-03-05 12:56 +0000
          Re: complex declarations James Kuyper <jameskuyper@verizon.net> - 2014-03-05 08:24 -0500
            Re: complex declarations "BartC" <bc@freeuk.com> - 2014-03-05 16:26 +0000
        Re: complex declarations James Kuyper <jameskuyper@verizon.net> - 2014-03-05 08:13 -0500
          Re: complex declarations Robbie Brown <dac@nomail.invalid> - 2014-03-05 13:32 +0000
        Re: complex declarations Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-03-05 14:32 +0000
    Re: complex declarations Robbie Brown <dac@nomail.invalid> - 2014-03-04 21:42 +0000
      Re: complex declarations Keith Thompson <kst-u@mib.org> - 2014-03-04 14:04 -0800
        Re: complex declarations Robbie Brown <dac@nomail.invalid> - 2014-03-05 09:22 +0000
          Re: complex declarations James Kuyper <jameskuyper@verizon.net> - 2014-03-05 07:29 -0500
            Re: complex declarations Keith Thompson <kst-u@mib.org> - 2014-03-05 08:38 -0800
      Re: complex declarations James Kuyper <jameskuyper@verizon.net> - 2014-03-04 17:05 -0500
  Re: complex declarations Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-03-04 21:15 +0000
    Re: complex declarations "BartC" <bc@freeuk.com> - 2014-03-04 21:38 +0000
      Re: complex declarations Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-03-04 23:27 +0000
    Re: complex declarations Robbie Brown <dac@nomail.invalid> - 2014-03-04 21:59 +0000
      Re: complex declarations James Kuyper <jameskuyper@verizon.net> - 2014-03-04 17:12 -0500
      Re: complex declarations Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-03-05 00:28 +0000
        Re: complex declarations Robbie Brown <dac@nomail.invalid> - 2014-03-05 09:10 +0000
          Re: complex declarations Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-03-05 11:44 +0000

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