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Groups > comp.lang.c > #65851

Re: Recursion or loop, design questions

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: Recursion or loop, design questions
Date 2015-07-18 15:04 +0100
Organization A noiseless patient Spider
Message-ID <87a8utbm0b.fsf@bsb.me.uk> (permalink)
References (9 earlier) <d44b6549-d8b3-409d-94d3-f48ac5efeabf@googlegroups.com> <87mvyvc5a8.fsf@bsb.me.uk> <tail-call-20150718110105@ram.dialup.fu-berlin.de> <87wpxxby1o.fsf@bsb.me.uk> <modjb6$j6d$1@dont-email.me>

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James Kuyper <jameskuyper@verizon.net> writes:

> On 07/18/2015 05:44 AM, Ben Bacarisse wrote:
>> ram@zedat.fu-berlin.de (Stefan Ram) writes:
> ["it" below refers to a tail-call]
> ...
>>>   If this is so easy and obvious for you, than give the definition of
>>>   it.
>> 
>> In a non-void function its a return statement whose expression is a
>> function call.  In a void function it's an expression statement that
>> consists of nothing but a function call immediately preceding a return
>> statement.
>
> My understanding is that a tail call occurs whenever the very last thing
> given subroutine does is call another subroutine. You've given two ways
> this can happen in C, but it seems to me that there are a few more. In a
> function returning a value, the expression in the return statement
> doesn't have to be a function call, it could merely contain a function
> call as it's last-executed sub-expression - but it must do nothing with
> the return value of that function except use it as it's own return
> value. It could be the second operand of a comma-expression, or the
> second or third operand of a ?: - I don't think there's.
>
> The same applies to the final expression executed before returning from
> a void function. Also, an explicit return statement is not needed for
> such functions.

Yes, it was always going to be fool's errand to try to be exact in C!
But you don't have to define all cases that match some more abstract
notion if the purpose is to say what will and what will not be
optimised.

As I said in another reply, I think you could use C's notion of sequence
points to get a very tight definition (a tail call being one where
nothing is done between the sequence points at the end of the called and
the calling function?) but that might preclude other optimisations.

> The key feature of a tail-call is that all memory set aside for the
> calling function can be dropped. In a C context, that implies an
> additional requirement: setjmp() must not be called in the calling
> function prior to the tail call.

I don't think that need affect the definition of a tail call.  You could
say that a tail call changes all the local objects, and you'd be covered
by the clause in the definition of longjmp that makes the values of such
objects indeterminate.  But in order to break fewer programs one would
have to say that tail calls in functions that use setjmp are never
optimised.

-- 
Ben.

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Thread

Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 12:49 +0200
  Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 12:03 +0100
    Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 14:15 +0200
      Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 13:49 +0100
        Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:15 +0200
          Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 14:25 +0100
            Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:36 +0200
              Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 14:51 +0100
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 16:02 +0200
              Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-09 20:48 +0100
          Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-09 09:54 -0400
            Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 15:08 +0100
              Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 16:16 +0200
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 15:18 +0100
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 16:24 +0200
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-09 20:31 +0100
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 21:42 +0200
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-10 00:57 +0100
        Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-09 20:39 +0100
          Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 21:44 +0100
          Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-09 22:50 +0100
    Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-09 13:49 +0100
      Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 13:52 +0100
        Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:26 +0200
          Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 14:28 +0100
  Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-09 05:28 -0700
    Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:09 +0200
      Re: Recursion or loop, design questions "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-07-09 09:25 -0700
        Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 18:41 +0200
          Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-10 11:52 -0400
            Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 18:44 +0200
              Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-10 18:52 +0100
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 20:34 +0200
            Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-10 11:50 -0700
              Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 20:56 +0200
              Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-10 13:30 -0700
                Re: Recursion or loop, design questions Philip Lantz <prl@canterey.us> - 2015-07-11 10:51 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-11 16:07 -0700
                Re: Recursion or loop, design questions Philip Lantz <prl@canterey.us> - 2015-07-12 00:20 -0700
              Re: Recursion or loop, design questions gordonb.j93iw@burditt.org (Gordon Burditt) - 2015-07-11 21:26 -0500
      Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-09 10:08 -0700
        Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 19:19 +0200
          Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 19:11 +0100
            Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 21:28 +0200
  Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-09 13:41 +0100
    Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:22 +0200
  Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 18:45 +0200
  Re: Recursion or loop, design questions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-07-09 18:05 +0000
    Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-11 07:06 -0700
      Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-11 15:51 -0700
        Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 09:36 -0700
          Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-15 10:49 -0700
          Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-15 13:05 -0500
            Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 10:28 -0700
              Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-20 12:41 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-20 21:37 +0100
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-24 13:05 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-24 15:07 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 12:42 -0700
              Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-24 15:38 -0500
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 12:39 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-30 22:35 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-02 07:09 -0700
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-08-02 14:43 -0500
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-03 09:48 -0700
  Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 21:23 +0200
  Re: Recursion or loop, design questions Andrew Cooper <amc96@cam.ac.uk> - 2015-07-10 00:52 +0100
    Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-10 01:28 +0100
      Re: Recursion or loop, design questions Phil Carmody <pc+usenet@asdf.org> - 2015-07-12 13:20 +0300
        Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-12 11:39 +0100
          Re: Recursion or loop, design questions David Kleinecke <dkleinecke@gmail.com> - 2015-07-12 10:28 -0700
          Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-13 08:17 +1200
            Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-07-21 14:46 +0200
              Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-25 19:27 -0700
          Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-07-13 21:16 +0000
    Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-10 08:34 +0100
      Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-10 00:46 -0700
      Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 12:35 +0200
        Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-10 12:47 +0100
          Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 14:29 +0200
    Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-11 06:36 -0700
      Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-11 07:16 -0700
        Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 14:23 -0700
          Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-15 15:27 -0700
            Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 19:27 -0700
      Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-11 15:27 +0100
        Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-11 08:00 -0700
          Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-11 15:46 -0700
            Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-11 16:01 -0700
            Re: Recursion or loop, design questions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-07-12 00:36 +0000
          Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 13:55 -0700
            Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-15 14:12 -0700
              Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 19:45 -0700
        Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 14:34 -0700
          Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-15 15:37 -0700
            Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-16 10:07 +0100
              Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-16 10:18 +0100
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-16 13:35 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-16 21:10 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-17 13:55 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-17 11:16 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-17 11:25 -0700
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-17 20:51 +0100
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-17 13:48 -0700
                Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-07-21 15:12 +0200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-21 10:56 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-21 19:43 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-21 12:52 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-21 21:17 +0100
                Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-07-21 23:58 +0200
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-22 20:39 +0100
                Re: Recursion or loop, design questions Richard Damon <Richard@Damon-Family.org> - 2015-07-24 00:54 -0400
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-24 09:06 +0100
                Re: Recursion or loop, design questions Richard Damon <Richard@Damon-Family.org> - 2015-07-24 08:04 -0400
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-24 13:48 +0100
                Re: Recursion or loop, design questions Richard Damon <Richard@Damon-Family.org> - 2015-07-25 14:02 -0400
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 13:41 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-02 15:41 +0200
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-02 21:51 +0000
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-03 01:20 +0200
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-04 10:54 +0000
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-04 06:02 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-08-04 14:03 +0100
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-04 11:36 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-04 11:21 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 12:18 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 13:19 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 13:35 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-08-04 21:40 +0100
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 13:51 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 22:57 +0200
                Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-08-05 08:45 +0200
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 14:19 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 23:22 +0200
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 14:28 -0700
                Language (was: Re: Recursion or loop, design questions) "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 23:35 +0200
                Re: Language (was: Re: Recursion or loop, design questions) Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-04 14:45 -0700
                Re: Language "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 23:55 +0200
                Re: Language (was: Re: Recursion or loop, design questions) fir <profesor.fir@gmail.com> - 2015-08-04 16:44 -0700
                Re: Language (was: Re: Recursion or loop, design questions) fir <profesor.fir@gmail.com> - 2015-08-04 17:18 -0700
                Re: Language (was: Re: Recursion or loop, design questions) fir <profesor.fir@gmail.com> - 2015-08-05 01:32 -0700
                Re: Language Richard Heathfield <rjh@cpax.org.uk> - 2015-08-05 09:51 +0100
                Re: Language Richard Heathfield <rjh@cpax.org.uk> - 2015-08-05 12:55 +0100
                Re: Language Gareth Owen <gwowen@gmail.com> - 2015-08-05 19:12 +0100
                Re: Language Richard Heathfield <rjh@cpax.org.uk> - 2015-08-06 17:09 +0100
                Re: Language luser droog <luser.droog@gmail.com> - 2015-08-06 15:10 -0700
                Re: Language Richard Heathfield <rjh@cpax.org.uk> - 2015-08-07 09:48 +0100
                Re: Language luser droog <luser.droog@gmail.com> - 2015-08-07 13:37 -0700
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-06 10:54 +0000
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-06 13:32 +0200
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-08-06 11:06 -0400
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-06 11:52 -0700
                Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-08-06 21:19 +0200
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-08-06 17:59 -0400
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-06 15:54 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-06 12:56 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-07 23:45 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-08 09:27 +0200
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-08 01:09 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-08 01:34 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-08-08 13:00 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-08 14:22 -0700
                Re: Recursion or loop, design questions David Kleinecke <dkleinecke@gmail.com> - 2015-08-08 16:12 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-08-08 17:31 -0700
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-09 13:34 +0000
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-09 08:38 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-09 09:31 +0200
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-09 01:52 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-06 04:40 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-25 20:19 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-25 23:59 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 15:53 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-25 19:43 -0700
                Re: Recursion or loop, design questions David Kleinecke <dkleinecke@gmail.com> - 2015-07-25 20:05 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-27 23:53 +0100
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-03 01:51 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-03 10:04 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-17 21:34 +0100
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-17 13:52 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-17 21:57 +0100
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 10:44 +0100
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-18 11:00 +0100
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-18 05:25 -0500
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 14:26 +0100
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-18 17:38 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 10:05 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 21:31 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 14:28 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-18 15:01 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 15:39 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-18 15:44 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 15:55 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-19 10:58 +1200
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-18 16:26 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 17:23 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-18 18:04 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 00:03 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-19 13:30 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 08:45 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-19 20:59 +0200
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-19 21:19 +0200
                Re: Recursion or loop, design questions Les Cargill <lcargill99@comcast.com> - 2015-07-20 07:23 -0500
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-07-19 21:11 +0000
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 15:37 -0700
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-09 13:55 +0000
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-05 11:22 -0700
                Re: Recursion or loop, design questions Gareth Owen <gwowen@gmail.com> - 2015-07-19 17:22 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 10:25 -0700
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-19 03:15 -0500
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-19 10:36 +0100
                Re: Recursion or loop, design questions Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-07-19 12:45 -0400
                Re: Recursion or loop, design questions Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-07-19 13:05 -0400
                Re: Recursion or loop, design questions Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-07-19 13:09 -0400
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 10:40 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-19 22:31 +0100
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-09 14:05 +0000
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-09 21:22 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-09 16:14 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-10 05:39 +0200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-10 01:40 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-08-10 21:03 +1200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-10 03:16 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-10 12:16 +0200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-10 03:36 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-10 12:45 +0200
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-22 14:07 +0000
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-22 14:07 +0000
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 02:47 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-19 22:23 +1200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 05:01 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 09:55 +1200
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-19 23:13 +0100
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 10:19 +1200
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-19 17:21 -0500
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-20 00:25 +0100
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 11:45 +1200
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-20 02:34 -0500
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-20 10:52 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-20 05:31 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 22:16 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 17:24 +1200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 22:36 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 21:07 +1200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-20 02:51 -0700
                Re: Recursion or loop, design questions Les Cargill <lcargill99@comcast.com> - 2015-07-19 10:12 -0500
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-19 16:54 -0500
                Re: Recursion or loop, design questions Les Cargill <lcargill99@comcast.com> - 2015-07-20 12:34 -0500
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 07:28 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-27 11:08 +0200
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 15:45 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-02 14:59 +0200
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-04 08:40 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 23:05 +0200
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-19 12:46 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 12:57 -0700
                Re: Recursion or loop, design questions Gareth Owen <gwowen@gmail.com> - 2015-07-19 21:16 +0100
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 15:50 -0700
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-18 09:13 -0400
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 15:04 +0100
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-18 12:40 -0400
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 16:27 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 14:26 +0100
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-18 09:58 -0400
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 15:24 +0100
                Re: Recursion or loop, design questions Richard Damon <Richard@Damon-Family.org> - 2015-07-18 10:29 -0400
                Re: Recursion or loop, design questions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-07-18 17:32 +0000
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 15:28 -0700
                Re: Recursion or loop, design questions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-07-20 22:58 +0000
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 03:13 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 21:49 +0100
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 15:12 -0700
                Re: Recursion or loop, design questions "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-07-20 15:21 -0700
                Re: Recursion or loop, design questions "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-07-20 15:23 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 03:46 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 03:31 -0700
            Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-21 04:08 -0700
  Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-11 08:50 -0700
    Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-11 18:43 +0200
      Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-11 18:54 +0200
        Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-11 13:06 -0400
          Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-12 23:45 +0200
            Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-12 17:48 -0400
              Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-13 01:27 +0200
      Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-11 19:39 +0100
      Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-11 14:51 -0700
        Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-11 23:51 +0100
          Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 08:04 -0700
        Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-16 09:36 +1200
          Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 10:37 -0700
            Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-21 20:55 +1200
              Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 07:39 -0700
      Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-16 09:41 +1200

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