Re: Return statement: anything goes?

From	BartC <bc@freeuk.com>
Newsgroups	comp.lang.c
Subject	Re: Return statement: anything goes?
Date	2017-03-11 18:34 +0000
Organization	A noiseless patient Spider
Message-ID	<oa1fpp$rnp$1@dont-email.me> (permalink)
References	<o9utno$5tn$1@dont-email.me> <87o9x8yjgp.fsf@bsb.me.uk> <e06a31f8-6c98-4fe3-a87f-aaddbef8d138@googlegroups.com> <50894c2b-554f-4a86-bd91-97d1372d137f@googlegroups.com>

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On 11/03/2017 15:43, Malcolm McLean wrote:
> On Friday, March 10, 2017 at 9:17:46 PM UTC, bart...@gmail.com wrote:
>> On Friday, 10 March 2017 20:18:05 UTC, Ben Bacarisse  wrote:
>>
>
>> Huh? Choosing to ignore or not take seriously what are obvious errors
>> (see other replies) is compiling a dialect of the language?

> Another issue is that some coding standards demand that every
> function return an int, which is 0 for success and -1 for failure.
>
> But that's not always easy to define, e.g. a function that takes an
> image and returns rectangles enclosing faces. What should it return?
> Not returning anything is arguably the best policy.

This is why in my own languages, there is a clear dividing line between 
functions and 'procedures'.

A function /has/ to return a value, and needs to be seen doing so before 
it runs into the end of the function. (Even if analysis might show it 
will never get to that point; it is easy enough to bung a dummy return 
in there.)

While procedures /can't/ return a value. They can only have an early 
return - without a value.

-- 
bartc

Thread

Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-10 19:13 +0000
  Re: Return statement: anything goes? John Bode <jfbode1029@gmail.com> - 2017-03-10 11:59 -0800
    Re: Return statement: anything goes? Keith Thompson <kst-u@mib.org> - 2017-03-10 12:34 -0800
  Re: Return statement: anything goes? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-10 20:17 +0000
    Re: Return statement: anything goes? bart4858@gmail.com - 2017-03-10 13:17 -0800
      Re: Return statement: anything goes? Ian Collins <ian-news@hotmail.com> - 2017-03-11 10:30 +1300
      Re: Return statement: anything goes? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-11 01:25 +0000
        Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-11 12:11 +0000
          Re: Return statement: anything goes? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-11 14:57 +0000
            Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-11 16:31 +0000
              Re: Return statement: anything goes? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-11 17:47 +0000
                Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-11 17:57 +0000
                Re: Return statement: anything goes? jameskuyper@verizon.net - 2017-03-11 10:59 -0800
                Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-11 19:34 +0000
                Re: Return statement: anything goes? jameskuyper@verizon.net - 2017-03-11 11:59 -0800
                Re: Return statement: anything goes? supercat@casperkitty.com - 2017-03-11 12:26 -0800
                Re: Return statement: anything goes? supercat@casperkitty.com - 2017-03-11 12:22 -0800
                Re: Return statement: anything goes? jameskuyper@verizon.net - 2017-03-11 12:42 -0800
                Re: Return statement: anything goes? supercat@casperkitty.com - 2017-03-11 13:01 -0800
                Re: Return statement: anything goes? Gordon Burditt <gordon@hammy.burditt.org> - 2017-03-13 16:25 -0500
            Re: Return statement: anything goes? Gareth Owen <gwowen@gmail.com> - 2017-03-11 16:43 +0000
              Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-11 18:13 +0000
                Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-11 18:27 +0000
          Re: Return statement: anything goes? gordonb.rlpr3@burditt.org (Gordon Burditt) - 2017-03-13 16:18 -0500
        Re: Return statement: anything goes? supercat@casperkitty.com - 2017-03-11 12:44 -0800
      Re: Return statement: anything goes? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-11 07:43 -0800
        Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-11 18:34 +0000
          Re: Return statement: anything goes? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-11 10:43 -0800
  Re: Return statement: anything goes? Keith Thompson <kst-u@mib.org> - 2017-03-10 12:27 -0800
  Re: Return statement: anything goes? Noob <root@127.0.0.1> - 2017-03-10 22:06 +0100
    Re: Return statement: anything goes? bart4858@gmail.com - 2017-03-10 13:26 -0800
      Re: Return statement: anything goes? antispam@math.uni.wroc.pl - 2017-03-12 05:29 +0000
        Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-12 10:52 +0000
          Re: Return statement: anything goes? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-12 12:19 +0000
            Re: Return statement: anything goes? BartC <bc@freeuk.com> - 2017-03-12 12:51 +0000

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