Re: What is Forth anyway?

From	Ron Aaron <rambamist@gmail.com>
Newsgroups	comp.lang.forth
Subject	Re: What is Forth anyway?
Date	2017-06-06 13:30 +0300
Organization	A noiseless patient Spider
Message-ID	<oh602j$lf4$1@dont-email.me> (permalink)
References	(6 earlier) <xn0kqvmew9gdh02004@nntp.aioe.org> <8bf8061e-8cd7-4148-90ef-10e4fdb88531@googlegroups.com> <oh5t4q$c94$1@dont-email.me> <oh5tct$boq$1@dont-email.me> <oh5vjg$ki0$1@dont-email.me>

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On 06/06/17 13:23, Alex wrote:
> On 6/6/2017 10:45, Ron Aaron wrote:

>> Even though (for example) eliminating "DUP DROP" would normally be
>> considered a "safe optimization", how is the compiler to know if the
>> programmer *intended* that due to side-effects?
>>
> 
> What side effects? And forget the compiler, what is the reader of such a
> thing meant to deduce from it?

The *reader* should be able to see a comment explaining why that
sequence is there, and what the side-effects are which require it.

Perhaps it's for a timing loop, or cache-clearing or who knows what?

A better example might be a "@ !" combo, which also nominally "does
nothing" but may have specifically desired effects on some hardware.

Thread

What is Forth anyway? Brad Eckert <hwfwguy@gmail.com> - 2017-06-03 20:31 -0700
  Re: What is Forth anyway? lehs <skydda.barnen@gmail.com> - 2017-06-03 23:05 -0700
    Re: What is Forth anyway? Howerd <howerdo@yahoo.co.uk> - 2017-06-04 03:23 -0700
      Re: What is Forth anyway? lehs <skydda.barnen@gmail.com> - 2017-06-04 03:39 -0700
  Re: What is Forth anyway? Howerd <howerdo@yahoo.co.uk> - 2017-06-04 03:17 -0700
    Re: What is Forth anyway? Howerd <howerdo@yahoo.co.uk> - 2017-06-04 03:18 -0700
  What is Forth anyway? Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-06-04 05:17 -0700
    Re: What is Forth anyway? Howerd <howerdo@yahoo.co.uk> - 2017-06-04 07:13 -0700
    Re: What is Forth anyway? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-05 02:38 -0500
  Re: What is Forth anyway? NN <november.nihal@gmail.com> - 2017-06-04 05:27 -0700
  Re: What is Forth anyway? "HAA" <someone@microsoft.com> - 2017-06-04 23:07 +1000
    Re: What is Forth anyway? Alex <alex@rivadpm.com> - 2017-06-04 19:12 +0100
      Re: What is Forth anyway? Howerd <howerdo@yahoo.co.uk> - 2017-06-04 12:55 -0700
        Re: What is Forth anyway? Alex <alex@rivadpm.com> - 2017-06-04 21:41 +0100
        Re: What is Forth anyway? "HAA" <someone@microsoft.com> - 2017-06-05 15:54 +1000
          Re: What is Forth anyway? Howerd <howerdo@yahoo.co.uk> - 2017-06-05 02:05 -0700
      Re: What is Forth anyway? Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-06-04 17:33 -0700
        Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-05 12:54 +0000
    Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-04 22:14 +0000
      Re: What is Forth anyway? hughaguilar96@gmail.com - 2017-06-04 16:39 -0700
        Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-05 12:44 +0000
          Re: What is Forth anyway? hughaguilar96@gmail.com - 2017-06-05 08:10 -0700
            Re: What is Forth anyway? gavino himself <jackvanc3@gmail.com> - 2017-06-05 10:01 -0700
            Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-05 19:29 +0000
              Re: What is Forth anyway? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-06 03:44 -0500
                Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 19:26 +0000
                Re: What is Forth anyway? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-08 02:06 -0500
                Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:09 +0000
            Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-05 19:41 +0000
              Re: What is Forth anyway? lehs <skydda.barnen@gmail.com> - 2017-06-06 02:19 -0700
                Re: What is Forth anyway? Alex <alex@rivadpm.com> - 2017-06-06 10:41 +0100
                Re: What is Forth anyway? Ron Aaron <rambamist@gmail.com> - 2017-06-06 12:45 +0300
                Re: What is Forth anyway? Alex <alex@rivadpm.com> - 2017-06-06 11:23 +0100
                Re: What is Forth anyway? Ron Aaron <rambamist@gmail.com> - 2017-06-06 13:30 +0300
                Re: What is Forth anyway? Alex <alex@rivadpm.com> - 2017-06-06 12:55 +0100
                Re: What is Forth anyway? Ron Aaron <rambamist@gmail.com> - 2017-06-06 14:57 +0300
                Re: What is Forth anyway? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-06 13:34 +0000
                Re: What is Forth anyway? Ron Aaron <rambamist@gmail.com> - 2017-06-06 17:07 +0300
                Re: What is Forth anyway? Coos Haak <htrofhc@gmail.com> - 2017-06-06 16:51 +0200
                Re: What is Forth anyway? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-06 16:32 +0000
                Re: What is Forth anyway? Coos Haak <htrofhc@gmail.com> - 2017-06-07 01:37 +0200
                Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 19:29 +0000
                Re: What is Forth anyway? Cecil Bayona <cbayona@cbayona.com> - 2017-06-07 14:56 -0500
                Re: What is Forth anyway? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-06 04:48 -0500
                Re: What is Forth anyway? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-06 10:10 +0000
                Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 19:28 +0000
                Re: What is Forth anyway? Cecil Bayona <cbayona@cbayona.com> - 2017-06-07 14:54 -0500
                Re: What is Forth anyway? lehs <skydda.barnen@gmail.com> - 2017-06-07 19:42 -0700
                Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:12 +0000
      Re: What is Forth anyway? Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-06-04 17:40 -0700
        Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-05 12:51 +0000
          Re: What is Forth anyway? Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-06-05 17:19 -0700
            Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 19:32 +0000
              Re: What is Forth anyway? Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-06-07 16:50 -0700
                Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:15 +0000
                Re: What is Forth anyway? Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-06-09 13:04 -0700
                Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 21:27 +0000
          Re: What is Forth anyway? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-06 10:19 +0000
            Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 19:38 +0000
              Re: What is Forth anyway? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-08 11:52 +0000
                Re: What is Forth anyway? "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:23 +0000
  Re: What is Forth anyway? gavino himself <jackvanc3@gmail.com> - 2017-06-05 07:16 -0700
  Re: What is Forth anyway? gavino himself <jackvanc3@gmail.com> - 2017-06-05 07:35 -0700

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