Re: // comments and \

From	Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups	comp.lang.c
Subject	Re: // comments and \
Date	2015-12-01 19:30 +0000
Organization	A noiseless patient Spider
Message-ID	<87mvtuc6fi.fsf@bsb.me.uk> (permalink)
References	(3 earlier) <n3k7or$gaf$1@speranza.aioe.org> <87fuzmdznb.fsf@bsb.me.uk> <63922dcf-c5cb-4aae-a271-d1fe0b450603@googlegroups.com> <87y4deccp1.fsf@bsb.me.uk> <463ed1ae-80d5-4718-8cb9-6e0d95e3a005@googlegroups.com>

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supercat@casperkitty.com writes:

> On Tuesday, December 1, 2015 at 11:15:51 AM UTC-6, Ben Bacarisse wrote:
>> By the way, handling them before anything else sounds unwise to me since
>> you'd interfere with trigraphs and the implementation-defined
>> translation to the source character set.  I think you mean they would be
>> done in a new translation phase between 1 and 2.  Even so, some existing
>> conforming code would be broken.
>
> Actually, I meant before phase 1.

Sorry, I was being polite.  I knew you meant before anything else.  I
was just saying that that's a bad idea.

> A stand-alone utility which feeds each
> line through a simple state machine and echoes everything as it goes along
> unless it reaches a "strip remainder" state.

But since you have to deal with multi-byte characters and trigraphs, you
are not really doing that "before phase 1" you are simply duplicating
the work of translation phase 1.  You also have to duplicate some of the
work of the lexer so that // is ignored in characters, strings and block
comments and that takes you into translation phase 3.  If you don't take
all these thongs into account, you break existing code.

All in all, even if you want to do it first (an in time -- and you
certainly can), // comments belongs where there were put, in phase 3.

> As for trigraphs, I consider
> them a bit of silliness which from what I understand have basically never
> been used for production code anywhere,

I wish!  Anyway, silliness or not, the committee does not have the
luxury of ignoring previous language standards.  Existing code has to be
taken into account.

<snip>
-- 
Ben.

Thread

// comments and \ BartC <bc@freeuk.com> - 2015-12-01 12:52 +0000
  Re: // comments and \ me <self@example.org> - 2015-12-01 13:08 +0000
    Re: // comments and \ Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-12-01 08:20 -0500
      Re: // comments and \ me <self@example.org> - 2015-12-01 13:36 +0000
        Re: // comments and \ Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-12-01 09:03 -0500
        Re: // comments and \ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-01 14:14 +0000
          Re: // comments and \ supercat@casperkitty.com - 2015-12-01 07:40 -0800
            Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-01 08:55 -0800
            Re: // comments and \ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-01 17:15 +0000
              Re: // comments and \ supercat@casperkitty.com - 2015-12-01 09:58 -0800
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 18:11 +0000
                Re: // comments and \ supercat@casperkitty.com - 2015-12-01 10:18 -0800
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 18:20 +0000
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-01 11:07 -0800
                Re: // comments and \ supercat@casperkitty.com - 2015-12-01 11:39 -0800
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-01 12:33 -0800
                Re: // comments and \ glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-12-02 01:05 +0000
                Re: // comments and \ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-01 19:30 +0000
            Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-01 20:59 +0100
              Re: // comments and \ James Kuyper <jameskuyper@verizon.net> - 2015-12-01 15:22 -0500
              Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 20:37 +0000
                Re: // comments and \ Robert Wessel <robertwessel2@yahoo.com> - 2015-12-01 14:56 -0600
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-01 22:11 +0100
                Re: // comments and \ Philip Lantz <prl@canterey.us> - 2015-12-02 03:01 -0800
            Re: // comments and \ glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-12-02 00:45 +0000
        Re: // comments and \ Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-12-01 07:52 -0700
          Re: // comments and \ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-01 15:19 +0000
            Re: // comments and \ Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-12-01 08:29 -0700
              Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 15:35 +0000
                Re: // comments and \ Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-12-01 09:21 -0700
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 16:41 +0000
                Re: // comments and \ Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-12-01 10:15 -0700
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 17:24 +0000
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 17:43 +0000
                Re: // comments and \ Philip Lantz <prl@canterey.us> - 2015-12-02 03:05 -0800
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-02 11:40 +0000
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-02 04:29 -0800
                Re: // comments and \ BartC <bc@freeuk.com> - 2015-12-01 19:11 +0000
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-01 20:43 +0000
                Re: // comments and \ BartC <bc@freeuk.com> - 2015-12-01 21:04 +0000
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-01 21:16 +0000
                Re: // comments and \ Philip Lantz <prl@canterey.us> - 2015-12-02 03:12 -0800
                Re: // comments and \ BartC <bc@freeuk.com> - 2015-12-02 11:52 +0000
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-02 04:40 -0800
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-02 13:55 +0100
                Re: // comments and \ BartC <bc@freeuk.com> - 2015-12-02 13:56 +0000
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-02 15:24 +0100
                Re: // comments and \ supercat@casperkitty.com - 2015-12-02 06:54 -0800
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-02 16:40 +0100
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-02 18:24 +0000
                Re: // comments and \ Öö Tiib <ootiib@hot.ee> - 2015-12-02 20:27 -0800
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-02 23:22 -0800
                Re: // comments and \ Öö Tiib <ootiib@hot.ee> - 2015-12-03 00:57 -0800
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-03 23:44 +0000
                Re: // comments and \ Öö Tiib <ootiib@hot.ee> - 2015-12-03 21:17 -0800
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-05 00:43 +0000
                Re: // comments and \ Les Cargill <lcargill99@comcast.com> - 2015-12-04 20:32 -0600
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-05 16:06 +0000
                Re: // comments and \ Les Cargill <lcargill99@comcast.com> - 2015-12-05 13:10 -0600
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-06 10:18 +0000
                Re: // comments and \ Les Cargill <lcargill99@comcast.com> - 2015-12-06 14:26 -0600
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-03 12:45 +0100
                Re: // comments and \ raltbos@xs4all.nl (Richard Bos) - 2015-12-04 11:45 +0000
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-04 04:20 -0800
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-04 14:20 +0100
                Re: // comments and \ James Kuyper <jameskuyper@verizon.net> - 2015-12-04 10:05 -0500
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-04 17:31 +0100
                Re: // comments and \ Les Cargill <lcargill99@comcast.com> - 2015-12-04 17:24 -0600
                Re: // comments and \ James Kuyper <jameskuyper@verizon.net> - 2015-12-04 18:50 -0500
                Re: // comments and \ Les Cargill <lcargill99@comcast.com> - 2015-12-04 20:34 -0600
                Re: // comments and \ raltbos@xs4all.nl (Richard Bos) - 2015-12-10 20:40 +0000
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-04 09:36 -0800
                Re: // comments and \ Richard Damon <Richard@Damon-Family.org> - 2015-12-05 09:05 -0500
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-05 17:42 +0000
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-06 22:23 +0100
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-07 21:59 +0000
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-05 15:50 +0000
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-05 18:17 +0100
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-06 10:01 +0000
                Re: // comments and \ Öö Tiib <ootiib@hot.ee> - 2015-12-06 03:05 -0800
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-06 04:07 -0800
                Re: // comments and \ Öö Tiib <ootiib@hot.ee> - 2015-12-06 04:37 -0800
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-06 05:05 -0800
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-06 12:19 -0800
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-06 13:59 +0000
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-06 06:09 -0800
                Re: // comments and \ Öö Tiib <ootiib@hot.ee> - 2015-12-06 07:30 -0800
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-06 18:55 +0000
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-06 12:23 -0800
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-06 12:22 -0800
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-06 21:06 +0000
                Re: // comments and \ Les Cargill <lcargill99@comcast.com> - 2015-12-05 13:14 -0600
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-06 10:09 +0000
                Re: // comments and \ mark.bluemel@gmail.com - 2015-12-03 06:15 -0800
                Re: // comments and \ Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-12-02 08:28 -0700
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-02 09:01 -0800
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-02 21:52 +0000
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-02 16:55 -0800
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-03 13:11 +0100
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-03 23:21 +0000
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-04 11:22 +0100
                Re: // comments and \ Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-12-05 01:12 +0000
                Re: // comments and \ Les Cargill <lcargill99@comcast.com> - 2015-12-04 20:39 -0600
                Re: // comments and \ raltbos@xs4all.nl (Richard Bos) - 2015-12-04 11:14 +0000
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-04 12:25 +0000
                Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-04 14:23 +0100
                Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-01 09:00 -0800
                Re: // comments and \ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-01 19:46 +0000
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 20:36 +0000
                Re: // comments and \ Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-12-01 20:37 -0700
  Re: // comments and \ BartC <bc@freeuk.com> - 2015-12-01 14:26 +0000
    Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 14:32 +0000
    Re: // comments and \ BartC <bc@freeuk.com> - 2015-12-01 14:52 +0000
      Re: // comments and \ David Brown <david.brown@hesbynett.no> - 2015-12-01 16:15 +0100
      Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 15:28 +0000
        Re: // comments and \ glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-12-02 01:26 +0000
      Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-01 09:12 -0800
        Re: // comments and \ Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-01 19:17 +0000
      Re: // comments and \ Robert Wessel <robertwessel2@yahoo.com> - 2015-12-01 12:32 -0600
    Re: // comments and \ Nobody <nobody@nowhere.invalid> - 2015-12-02 00:01 +0000
      Re: // comments and \ supercat@casperkitty.com - 2015-12-02 07:08 -0800
        Re: // comments and \ Nobody <nobody@nowhere.invalid> - 2015-12-02 21:05 +0000
          Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-02 14:22 -0800
          Re: // comments and \ supercat@casperkitty.com - 2015-12-02 14:48 -0800
            Re: // comments and \ glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-12-02 23:37 +0000
              Re: // comments and \ supercat@casperkitty.com - 2015-12-02 17:10 -0800
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-02 19:24 -0800
                Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-03 04:10 +0000
                Re: // comments and \ Philip Lantz <prl@canterey.us> - 2015-12-02 21:49 -0800
                Re: // comments and \ Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-12-03 07:28 -0700
                Re: // comments and \ supercat@casperkitty.com - 2015-12-03 09:12 -0800
                Re: // comments and \ supercat@casperkitty.com - 2015-12-03 06:53 -0800
                Re: // comments and \ supercat@casperkitty.com - 2015-12-03 15:41 -0800
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-03 15:56 -0800
                Re: // comments and \ supercat@casperkitty.com - 2015-12-03 16:44 -0800
                Re: // comments and \ Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-12-03 17:29 -0800
                Re: // comments and \ supercat@casperkitty.com - 2015-12-03 19:10 -0800
        Re: // comments and \ Philip Lantz <prl@canterey.us> - 2015-12-02 21:59 -0800
  Re: // comments and \ Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-12-01 07:52 -0700
  Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-01 09:21 -0800
    Re: // comments and \ Richard Heathfield <rjh@cpax.org.uk> - 2015-12-01 17:26 +0000
      Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-01 10:50 -0800
    Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-01 10:49 -0800
      Re: // comments and \ Geoff <geoff@invalid.invalid> - 2015-12-01 11:34 -0800
    Re: // comments and \ David Thompson <dave.thompson2@verizon.net> - 2015-12-22 06:44 -0500
      Re: // comments and \ "Charles Richmond" <numerist@aquaporin4.com> - 2015-12-23 14:35 -0600
        Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-23 13:00 -0800
          Re: // comments and \ James Kuyper <jameskuyper@verizon.net> - 2015-12-23 16:58 -0500
            Re: // comments and \ Keith Thompson <kst-u@mib.org> - 2015-12-23 14:21 -0800
        Re: // comments and \ James Kuyper <jameskuyper@verizon.net> - 2015-12-23 16:55 -0500
  Re: // comments and \ Öö Tiib <ootiib@hot.ee> - 2015-12-01 12:24 -0800

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