Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.c > #18326

Re: Evaluation Order in Function Declaration

Path csiph.com!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!border3.nntp.dca.giganews.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail
NNTP-Posting-Date Thu, 08 Mar 2012 07:49:17 -0600
Message-ID <4F58B8DC.4433@mindspring.com> (permalink)
Date Thu, 08 Mar 2012 08:49:16 -0500
From pete <pfiland@mindspring.com>
Reply-To pfiland@mindspring.com
Organization PF
X-Mailer Mozilla 3.04Gold (WinNT; I)
MIME-Version 1.0
Newsgroups comp.lang.c
Subject Re: Evaluation Order in Function Declaration
References <jihoad$2pj$1@dont-email.me>
Content-Type text/plain; charset=us-ascii
Content-Transfer-Encoding 7bit
Lines 31
X-Usenet-Provider http://www.giganews.com
NNTP-Posting-Host 4.154.219.165
X-Trace sv3-Jj14uP3oqxoCKocsihOUp+hbrgpPoxD37ehthT7iOB65w58rLhDwQ3ymdsAx3nBfYVm5XmTQt7cYzqk!vmqjX/vky5lzALH+6kACCIBsVbihSX74VysTMMd5/NqX/VTVXd3J9U4k5wGoe3Et5VWIeU8kUZV7!4ODbUHTMQjA=
X-Abuse-and-DMCA-Info Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info Otherwise we will be unable to process your complaint properly
X-Postfilter 1.3.40
X-Original-Bytes 1879
Xref csiph.com comp.lang.c:18326

Show key headers only | View raw


Shao Miller wrote:
> 
> Is the evaluation order guaranteed to be left-to-right for the
> declaration of 'baz' in the following code?  Or are the array size
> expressions unsequenced relative to one another, as in 'a + b'?  Or
> something else?
> 
>    #include <stdio.h>
> 
>    int foo(void) { puts("foo"); return 1; }
>    int bar(void) { puts("bar"); return 1; }
> 
>    int baz(int (* x)[foo()], int (* y)[bar()]) { return 0; }
> 
>    int main(void) { return baz(0, 0); }

Whether that program will output "foo" or "bar" first,
is unspecified.

n1570

6.5.2.2 Function calls

12 EXAMPLE In the function call
  (*pf[f1()]) (f2(), f3() + f4())
   the functions f1, f2, f3, and f4 may be called in any order.
   All side effects have to be completed before
   the function pointed to by pf[f1()] is called.

-- 
pete

Back to comp.lang.c | Previous | Next — Previous in thread | Find similar | Unroll thread


Thread

Evaluation Order in Function Declaration Shao Miller <sha0.miller@gmail.com> - 2012-02-28 00:22 -0500
  Re: Evaluation Order in Function Declaration Jens Gustedt <jens.gustedt@loria.fr> - 2012-02-28 10:14 +0100
    Re: Evaluation Order in Function Declaration Kaz Kylheku <kaz@kylheku.com> - 2012-02-28 09:31 +0000
      Re: Evaluation Order in Function Declaration Jens Gustedt <jens.gustedt@loria.fr> - 2012-02-28 13:09 +0100
  Re: Evaluation Order in Function Declaration pete <pfiland@mindspring.com> - 2012-03-08 08:49 -0500

csiph-web