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Re: Good practical language and OS agnostic text?

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gah@nospam.ugcs.caltech.edu wrote

> You might be right that all books are one (or more) of those three,
> but then you should choose from among those.

If that would have been an option I would have done it by now.

> C is a nice, simple language in which to describe compiler design, and
> also not so bad a language in which to write compilers.  Given that,
> it isn't a bad start toward writing one for another language, and/or
> written in another language, unless you don't know C.

I don't know C and it's not a good choice on z/OS. I am familiar with
assembler and I used to know PL/I fairly well and could come up to speed
with it and use it if it would be a good implementation choice. I don't
think it would though, because it requires the IBM runtime which is licensed.

> Both C and Java are fairly simple, and reasonably similar, with much
> of the complication moved to the library. That means a complete
> compiler can be described relatively simply, covering all the
> important ideas. Once you learn those, you will be ready to go on to
> other languages (both for compiling and writing the compiler in).

I really don't like C or Java and I didn't come out and say it because I
don't mean to start a holy war. I have looked at them. C just doesn't have
much value on z/OS. Java is too limiting in other ways. I am familiar with
the older languages and never was interested in much of anything that came
later although I have some experience with modern scripting languages.

> You don't say what language you are interested in.

I am not exactly sure. I was considering a subset PL/I or PL/M variant or
maybe even a new language. Even a super Pascal or Modula-something would be
interesting to me.

> There are some complications to writing Fortran compilers not covered in
> most books. Both Fortran and PL/I don't have reserved words, which
> requires special handling by the compiler. Fixed form Fortran ignores
> blanks, which requires a special lexical analysis technique, but most of
> compiler theory is in parsing, which is reasonably language independent.

I think Fortran would be hard because I couldn't write the libraries needed
due to my lack of mathematical background. F77 would be an interesting
project, the latest Fortran is way more complicated than I would attempt.

PL/I is interesting because I have access to old and new PL/I compilers and
good doc for z/OS. I figured I could develop the grammar from the manuals
but I know it would be a huge project, more than I have the time and ability
to do and a better PL/I than I or many people could write already exists,
so there's not much point in it.

> It seems to me natural that a pseudo-code description will be more
> theoretical, and harder to understand, than one using a well-known
> high-level language.

That's a bit of a tautology. If the well-known language is something /you/
know then yes! Otherwise..

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Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-17 21:28 +0000
  Re: Good practical language and OS agnostic text? Philip Herron <redbrain@gcc.gnu.org> - 2012-04-18 14:25 +0100
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-19 16:32 +0000
      Re: Good practical language and OS agnostic text? arnold@skeeve.com (Aharon Robbins) - 2012-04-20 03:58 +0000
        Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-22 10:10 +0000
      Re: Good practical language and OS agnostic text? "BartC" <bc@freeuk.com> - 2012-04-20 09:45 +0100
        Re: Good practical language and OS agnostic text? "Jonathan Thornburg" <jthorn@astro.indiana.edu> - 2012-04-21 15:04 +0000
  Re: Good practical language and OS agnostic text? BGB <cr88192@hotmail.com> - 2012-04-18 08:39 -0700
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-19 17:32 +0000
  Re: Good practical language and OS agnostic text? Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-04-18 18:24 +0200
    Re: Good practical language and OS agnostic text? Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2012-04-19 13:53 +0200
      Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-21 03:07 +0000
      Re: Good practical language and OS agnostic text? "BartC" <bc@freeuk.com> - 2012-04-21 12:01 +0100
        Re: code quality, was Good practical language and OS agnostic text? Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2012-04-22 12:41 +0200
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-19 11:31 +0000
      Re: Good practical language and OS agnostic text? "Jonathan Thornburg" <jthorn@astro.indiana.edu> - 2012-04-20 16:19 +0000
  Re: Good practical language and OS agnostic text? "Derek M. Jones" <derek@knosof.co.uk> - 2012-04-18 18:16 +0100
    Re: Good practical language and OS agnostic text? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-04-18 22:43 +0000
      Re: Good practical language and OS agnostic text? BGB <cr88192@hotmail.com> - 2012-04-19 00:05 -0700
      Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-19 11:31 +0000
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-19 16:32 +0000
  Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-18 19:30 +0000
    Re: Good practical language and OS agnostic text? "BartC" <bc@freeuk.com> - 2012-04-19 18:43 +0100
  Re: Good practical language and OS agnostic text? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-04-18 20:29 +0000
    Re: Good practical language and OS agnostic text? Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2012-04-19 14:20 +0200
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-19 19:05 +0000
      Re: Good practical language and OS agnostic text? Uli Kusterer <ulimakesacompiler@googlemail.com> - 2012-04-21 11:30 +0200
  Re: Good practical language and OS agnostic text? Roberto Waltman <usenet@rwaltman.com> - 2012-04-18 22:00 -0400
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-19 11:31 +0000
      Re: Good practical language and OS agnostic text? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-04-20 07:02 +0000
        Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-22 11:10 +0000
          Re: Good practical language and OS agnostic text? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-04-22 23:56 +0000
        Re: PL/360, was Good practical language and OS agnostic text? ArarghMail204@Arargh.com - 2012-04-24 19:13 -0500
  Re: Good practical language and OS agnostic text? Bakul Shah <usenet@bitblocks.com> - 2012-04-18 21:15 -0700
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-20 16:06 +0000
  Re: Good practical language and OS agnostic text? torbenm@diku.dk (Torben Ægidius Mogensen) - 2012-04-19 14:58 +0200
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-20 16:06 +0000
  Re: Good practical language and OS agnostic text? "Joe Schmo" <askmeforit@myisp.com> - 2012-04-21 02:53 -0600
    Re: Writing parsers, was Good practical language and OS agnostic text? Uli Kusterer <ulimakesacompiler@googlemail.com> - 2012-04-22 16:18 +0200
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-23 19:12 +0000
  Re: Good practical language and OS agnostic text? Uli Kusterer <ulimakesacompiler@googlemail.com> - 2012-04-21 11:22 +0200
    Re: Good practical language and OS agnostic text? BGB <cr88192@hotmail.com> - 2012-04-21 18:58 -0700
      Re: writing interpreters, was Good practical language and OS agnostic text? Uli Kusterer <ulimakesacompiler@googlemail.com> - 2012-04-22 12:53 +0200
        Re: writing interpreters, was Good practical language and OS agnostic text? BGB <cr88192@hotmail.com> - 2012-04-22 12:29 -0700
      Re: generating bytecode, was Good practical language and OS agnostic text? Uli Kusterer <ulimakesacompiler@googlemail.com> - 2012-04-22 13:12 +0200
      Re: Recursive descent parsing and optimization, was Good practical language and OS agnostic text? "BartC" <bc@freeuk.com> - 2012-04-22 12:51 +0100
        Re: Recursive descent parsing and optimization, was Good practical language and OS agnostic text? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2012-04-22 18:18 +0200
          Re: Recursive descent parsing and optimization, was Good practical language and OS agnostic text? "Bartc" <bartc@freeuk.com> - 2012-04-23 10:59 +0100
        Re: Recursive descent parsing and optimization, was Good practical language and OS agnostic text? BGB <cr88192@hotmail.com> - 2012-04-22 13:45 -0700
    Re: Good practical language and OS agnostic text? compilers@is-not-my.name - 2012-04-22 22:11 +0000
      Re: Good practical language and OS agnostic text? "BartC" <bc@freeuk.com> - 2012-04-23 18:41 +0100
  Re: Good practical language and OS agnostic text? basile@starynkevitch.net - 2012-05-02 22:16 -0700
    Re: Good practical language and OS agnostic text? Johann 'Myrkraverk' Oskarsson <johann@2ndquadrant.com> - 2012-06-06 16:52 +0000

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