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Groups > alt.os.development > #9098

Re: C parser ramblings, language design, etc

From James Harris <james.harris.1@gmail.com>
Newsgroups alt.os.development
Subject Re: C parser ramblings, language design, etc
Date 2016-01-16 17:09 +0000
Organization A noiseless patient Spider
Message-ID <n7dtc2$sev$1@dont-email.me> (permalink)
References (6 earlier) <op.x499nwp5yfako5@localhost> <mts8k8$kgq$1@dont-email.me> <op.x5sw4btxyfako5@localhost> <n5oq88$qa9$1@dont-email.me> <op.yabqczhayfako5@localhost>

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On 27/12/2015 22:35, Rod Pemberton wrote:
> On Sun, 27 Dec 2015 08:51:24 -0500, James Harris
> <james.harris.1@gmail.com> wrote:
>
>> On 01/10/2015 01:32, Rod Pemberton wrote:

...

> Around the time you last posted, I figured out two paths
> I could take my command-line interpreter project, after
> realizing that half my OS code should be used in the
> command-line interpreter project and the other half should
> really be spun out as a pure, standalone OS.  My initial
> path for my OS project was for an execution environment
> for DJGPP apps and deviated into the OS project.  The first
> path for the command-line interpreters is towards a Windows
> 98/SE like OS, i.e., execution environment for DJGPP apps.
> I'm using "OS" loosely here.  The other path would be
> towards a Linux kernel and/or shell on DOS.  While the
> latter would be interesting, the DJGPP C compiler won't
> support full Linux apps on DOS.  There is a bit of work
> in four or five areas I'd need to do to progress this.

That seems to be traditional and a good design. IIRC the Unix model has 
a privileged kernel and an unprivileged command-line interpreter. The 
latter communicates with the former by (making library calls which get 
translated to) system calls.

> I _really_ haven't been motivated to do any programming
> since I figured out those paths for my projects ...

I don't have the motivation I once had. Perhaps we should do these 
projects while we are younger!

...

I've snipped your entire paragraph talking about a language that has an 
expletive in its name. If possible, it would be great if you could omit 
further reference to that language. Your choice, of course, but some 
people, including me, still find such words offensive and it's not 
something I would type or discuss, and is a word I try to avoid reading.

...

>>> Technically, I *could* walk the AST, but that is slows everything
>>> down.  I was attempting to do this without doing so, i.e., single
>>> pass of AST to assembly, no walking or backtracking of ASTs whether
>>> as a binary tree or linked-list.
>>
>> If you can walk any sort of tree at this point then I have to suggest
>> it would be better to use a normal parse mechanism. With the exception
>> of a backtracking parser, parsing is one of the faster phases of a
>> compiler so you may be ill advised to try to save time with your
>> contextless approach.
>
> ....
>
>> It may be a bit like trying to analyse a chess
>> position based purely on the current board without forming a game
>> tree: great and revolutionary if you could make it work but probably
>> impractical, impossible to program, and more work in the long run.
>
> Why do you see this as any different from analyzing a chess game
> from the starting positions?  i.e., no move history or game tree,
> unless artificially constructed for initial piece placement ...

I see them as similar. Both (traditionally) need a tree to be 
constructed. I was saying that parsing without constructing a tree seems 
to me similar to trying to analyse a chess position without constructing 
a tree. There may be a way to do both without using a tree but no one 
has discovered it yet and it's likely to be much easier in both cases 
just to follow the traditional process; you may be making life harder 
for yourself in the long run by trying to avoid what you call a 
grammar-based parse.

...

> Bulls and cows?  ... (look up)
>
> Wikipedia says the game is similar to the commercial game Mastermind.
>
> I loved Mastermind as a kid for a year or so.  However, I have
> no recollection as to how the game was played, or how I solved it,
> just that I seemed to win frequently, against other kids ...  I
> still remember the board and pegs.

I think the Mastermind board game was just a modern copy of Bulls and 
Cows. Like you I had fun playing it as a kid.

In the UK there was a TV programme called Mastermind in which a 
questionmaster would grill contestants on specialist subjects and 
general knowledge. I think the Mastermind board game box graphic was 
based on it. It seems that the Mastermind TV show is still running or 
has been revived. I wouldn't be surprised if it was run in other 
countries too.

I think I have finally caught up with any outstanding replies on this 
newsgroup. Sorry for the delay. Let me know if I have missed any you are 
aware of and I will get to them.

James

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Thread

C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-11 19:11 -0400
  Re: C parser ramblings, language design, etc "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-09-12 05:10 -0700
    Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-13 04:41 -0400
      Re: C parser ramblings, language design, etc "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-09-13 02:37 -0700
        Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-13 07:20 -0400
          Re: C parser ramblings, language design, etc "James Harris" <james.harris.1@gmail.com> - 2015-09-13 18:37 +0100
        Re: C parser ramblings, language design, etc "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-09-13 21:03 -0700
  Re: C parser ramblings, language design, etc "James Harris" <james.harris.1@gmail.com> - 2015-09-12 13:49 +0100
    Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-13 06:27 -0400
      Re: C parser ramblings, language design, etc "James Harris" <james.harris.1@gmail.com> - 2015-09-13 19:02 +0100
        Re: C parser ramblings, language design, etc "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-09-13 15:10 -0700
        Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-13 20:30 -0400
          Re: C parser ramblings, language design, etc "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-09-13 20:07 -0700
          Re: C parser ramblings, language design, etc "James Harris" <james.harris.1@gmail.com> - 2015-09-14 22:29 +0100
            Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-20 18:48 -0400
              Re: C parser ramblings, language design, etc "James Harris" <james.harris.1@gmail.com> - 2015-09-22 20:04 +0100
                Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-30 20:32 -0400
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2015-12-27 13:51 +0000
                Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-12-27 17:35 -0500
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-16 17:09 +0000
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-01-16 14:30 -0500
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-16 21:40 +0000
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-01-18 07:34 -0500
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-01-18 08:37 -0500
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-18 23:35 +0000
                Re: C parser ramblings, language design, etc "wolfgang kern" <nowhere@never.at> - 2016-01-19 12:52 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-19 13:09 +0000
                Re: C parser ramblings, language design, etc "wolfgang kern" <nowhere@never.at> - 2016-01-19 21:46 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-21 11:15 +0000
                Re: C parser ramblings, language design, etc "wolfgang kern" <nowhere@never.at> - 2016-01-21 21:48 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-22 15:16 +0000
                Re: C parser ramblings, language design, etc "wolfgang kern" <nowhere@never.at> - 2016-01-22 23:02 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-01-23 17:04 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-27 15:27 +0000
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-02-29 09:26 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-02-29 19:02 +0000
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-03-02 20:48 +0000
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-03-09 22:29 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-03-17 16:41 +0000
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-03-29 09:00 +0200
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-03-09 22:29 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-03-17 17:36 +0000
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-03-29 09:01 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-04-02 10:13 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-04-10 19:33 +0200
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-04-15 16:27 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-04-26 08:10 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-05-03 20:14 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-05-04 09:17 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-05-21 21:10 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-05-29 08:44 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-05-29 12:05 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-05-29 12:28 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-06-01 19:22 +0200
                OT: Obama in the UK (was: C parser ramblings, language design, etc) James Harris <james.harris.1@gmail.com> - 2016-04-26 08:46 +0100
                Re: OT: Obama in the UK (was: C parser ramblings, language design, etc) Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-26 23:58 -0400
                Re: OT: Obama in the UK (was: C parser ramblings, language design, etc) Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-27 00:08 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-04-27 06:40 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-27 05:25 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-04-27 17:45 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-27 18:25 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-02 23:44 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-03 16:56 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-04 09:23 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-04 17:22 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-06 11:47 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-06 19:34 -0400
                Re: OT: Obama in the UK "James Harris" <james.harris.1@gmail.com> - 2016-05-07 12:51 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-07 19:20 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-08 01:46 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-07 21:43 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-08 09:36 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-08 15:34 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-10 11:25 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-10 17:32 -0400
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-10 18:25 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-15 00:06 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-07 21:32 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-06-02 07:41 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-06-02 16:21 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-20 14:59 +0100
                Re: OT: Obama in the UK "wolfgang kern" <nowhere@never.at> - 2016-05-20 21:13 +0200
                Re: OT: Obama in the UK "wolfgang kern" <nowhere@never.at> - 2016-05-20 21:17 +0200
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-21 08:04 +0100
                Re: OT: Obama in the UK Bernhard Schornak <schornak@web.de> - 2016-05-21 21:10 +0200
                Re: OT: Obama in the UK "wolfgang kern" <nowhere@never.at> - 2016-05-21 11:16 +0200
                Re: OT: Obama in the UK Bernhard Schornak <schornak@web.de> - 2016-05-21 21:11 +0200
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-05-20 22:51 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-21 07:29 +0100
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-06-02 08:33 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-06-02 16:21 -0400
                UK pronunciation was, [Re: OT: Obama in the UK, was C lang parser ramblings] Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-06-11 14:34 -0400
                Re: UK pronunciation was, [Re: OT: Obama in the UK, was C lang parser ramblings] James Harris <james.harris.1@gmail.com> - 2016-07-24 18:28 +0100
                Re: UK pronunciation was, [Re: OT: Obama in the UK, was C lang parser ramblings] Rod Pemberton <NoHaveNotOne@bcczxcfrze.cam> - 2016-07-25 21:54 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-07-24 18:21 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfrze.cam> - 2016-07-25 21:54 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-07-26 10:02 +0100
                Re: OT: Obama in the UK Rod Pemberton <NoHaveNotOne@bcczxcfrze.cam> - 2016-07-26 07:56 -0400
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-07-30 12:26 +0100
                Re: OT: Obama in the UK Bernhard Schornak <schornak@web.de> - 2016-05-03 20:14 +0200
                Re: OT: Obama in the UK James Harris <james.harris.1@gmail.com> - 2016-05-04 09:25 +0100
                Re: OT: Obama in the UK Bernhard Schornak <schornak@web.de> - 2016-05-21 21:11 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-04-26 07:59 +0100
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-27 00:01 -0400
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-04-27 09:28 +0100
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-27 05:42 -0400
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-04-27 17:16 +0100
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-27 18:05 -0400
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-04-27 09:29 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-04-27 09:42 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-05-03 20:14 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-05-07 14:34 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-05-21 21:10 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-05-29 11:27 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-06-01 19:22 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-05-07 16:34 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-05-21 21:10 +0200
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-05-29 12:10 +0100
                Re: C parser ramblings, language design, etc Bernhard Schornak <schornak@web.de> - 2016-06-01 19:22 +0200
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-01-25 18:29 -0500
                Re: C parser ramblings, language design, etc "wolfgang kern" <nowhere@never.at> - 2016-01-26 11:47 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-27 17:08 +0000
                Re: C parser ramblings, language design, etc "wolfgang kern" <nowhere@never.at> - 2016-01-28 11:54 +0100
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-28 11:47 +0000
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-21 10:13 +0000
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-01-25 18:29 -0500
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-27 17:15 +0000
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-01-27 17:31 -0500
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-28 11:07 +0000
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-01-19 22:28 -0500
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-22 15:04 +0000
                Re: C parser ramblings, language design, etc Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-01-25 17:48 -0500
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2016-01-27 17:16 +0000
                Re: cows and bulls game, was [Re: C parser ramblings, language design, etc] "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-12-27 21:19 -0500
              Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-30 20:32 -0400
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2015-10-05 15:13 +0100
                Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-10-05 21:56 -0400
                Re: C parser ramblings, language design, etc James Harris <james.harris.1@gmail.com> - 2015-12-27 13:56 +0000
                Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-10-21 19:46 -0400
  Re: C parser ramblings, language design, etc "James Harris" <james.harris.1@gmail.com> - 2015-09-12 15:38 +0100
    Re: C parser ramblings, language design, etc "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-09-13 07:10 -0400
  Re: C parser ramblings, language design, etc "s_dubrovich@yahoo.com" <s_dubrovich@yahoo.com> - 2015-11-01 09:07 -0800

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