Re: bart again (UCX64)

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From	Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups	comp.lang.c
Subject	Re: bart again (UCX64)
Date	Thu, 07 Sep 2023 14:36:03 -0700
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Bart <bc@freeuk.com> writes:
[...]
> I've already suggested a compiler should return all-zeros as a default
> return value for code that runs into the final '}'. That will provide
> a consistent return value.

That could mask bugs.

    int func(void) {
        if (this) {
            return a_value;
        }
        else if (that) {
            return another_value;
        }
        else if (the_other) {
            return yet_another_value;
        }
    }

Perhaps I simply forgot to write a return statement at the end, either
before the closing } or in an else clause.  Currently, a compiler is not
required to diagnose this, but many will warn about it with the right
options.  If the language stated that falling off the end implicitly
returns "all-zeros" (I won't get into what that means), then the behavior
is well defined and the compiler is unlikely to be able to help.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Will write code for food.
void Void(void) { Void(); } /* The recursive call of the void */

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Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-05 15:33 +0100
  Re: bart again (UCX64) scott@slp53.sl.home (Scott Lurndal) - 2023-09-05 14:55 +0000
    Re: bart again (UCX64) Bobby Moore <bobbymoore018@gmail.com> - 2023-09-05 08:30 -0700
  Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-05 17:31 +0200
    Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-05 18:06 +0100
      Re: bart again (UCX64) Kaz Kylheku <864-117-4973@kylheku.com> - 2023-09-05 17:54 +0000
      Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-05 20:10 +0200
        Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-05 20:57 +0100
          Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-05 22:37 +0200
            Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-05 22:05 +0100
              Re: bart again (UCX64) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-05 15:10 -0700
                Re: bart again (UCX64) Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-09-06 22:32 -0700
                Re: bart again (UCX64) Kaz Kylheku <864-117-4973@kylheku.com> - 2023-09-07 06:49 +0000
              Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-06 16:08 +0200
                Re: bart again (UCX64) Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-09-06 07:53 -0700
                Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-06 17:35 +0200
                Re: bart again (UCX64) Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-09-06 09:37 -0700
                Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-06 20:49 +0200
                Re: bart again (UCX64) scott@slp53.sl.home (Scott Lurndal) - 2023-09-06 19:51 +0000
                Re: bart again (UCX64) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-09-06 12:52 -0700
                Re: bart again (UCX64) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-09-07 00:36 +0100
                Re: bart again (UCX64) Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-09-06 17:06 -0700
                Re: bart again (UCX64) Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-09-06 18:47 -0700
                Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-07 11:11 +0200
                Re: bart again (UCX64) Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-09-07 04:04 -0700
                Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-07 13:24 +0200
                Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-06 18:13 +0100
                Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-06 21:17 +0200
                Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-06 22:24 +0100
                Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-07 11:37 +0200
                Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-07 11:53 +0100
                Re: bart again (UCX64) David Brown <david.brown@hesbynett.no> - 2023-09-07 13:33 +0200
                Re: bart again (UCX64) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-07 14:36 -0700
                Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-07 22:59 +0100
                Re: bart again (UCX64) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-07 16:58 -0700
                Re: bart again (UCX64) Kaz Kylheku <864-117-4973@kylheku.com> - 2023-09-08 00:35 +0000
          Re: bart again (UCX64) Kaz Kylheku <864-117-4973@kylheku.com> - 2023-09-05 20:41 +0000
          Re: bart again (UCX64) Kaz Kylheku <864-117-4973@kylheku.com> - 2023-09-05 20:47 +0000
          Re: bart again (UCX64) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-05 14:07 -0700
            Re: bart again (UCX64) Bart <bc@freeuk.com> - 2023-09-05 22:22 +0100
              Re: bart again (UCX64) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-05 15:26 -0700
              Re: bart again (UCX64) Richard Damon <Richard@Damon-Family.org> - 2023-09-05 18:26 -0700
      Re: bart again (UCX64) James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-09-07 23:15 -0400
  Re: bart again (UCX64) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-05 13:48 -0700
    Re: bart again (UCX64) Kaz Kylheku <864-117-4973@kylheku.com> - 2023-09-05 21:36 +0000

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