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Re: A Small Challenge (Re: Astronomy and programming languages)

From Rod Pemberton <NeedNotReplyHere@xrsevnneqk.cem>
Newsgroups comp.lang.forth
Subject Re: A Small Challenge (Re: Astronomy and programming languages)
Date 2017-06-13 10:04 -0400
Organization Aioe.org NNTP Server
Message-ID <20170613100422.3c624a77@_> (permalink)
References <2017Jun3.110911@mips.complang.tuwien.ac.at> <0d43eaa4-26b4-4e26-801f-fec56d43a717@googlegroups.com>

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On Mon, 12 Jun 2017 22:20:37 -0700 (PDT)
Joel Rees <joel.rees@gmail.com> wrote:

> How about writing a C compiler in Forth?

...

> I recall that, about thirty years ago, many were saying it could be
> done.

There are some complexities to parsing C.  It's not as simple and
straight forward as it seems.  But, if you get past that, then you need
to convert C's functions, which take function parameters, to
zero-operand, i.e., stack based, like Forth.  C doesn't require a stack
for functions, but most C's use one because it allows for recursion.
I.e., C's function calls push and pop arguments to the stack.  Once the
behavior to push/pop parameters is implemented, then you need to convert
C's control-flow to Forth.  I think that would cover a very large
percentage of C, if not all of it.

In other words, most of Forth (high-level) is basically procedures
with a bunch of C function calls declared as "void function
(void)" (i.e., zero-operand) with some control-flow.  Some procedures
primitives which do work.  You'd need to contort/rewrite C to fit this
simpler model.

> Using C as an example, we could construct an ANSI C interpreter,

There are ANSI C interpreters out there.  So far, I haven't seen any
which are able to implement the entire C language.  The ones I'm aware
of are not coded in Forth either.  However, they could be modified to
emit Forth.  The same is probably true of C compilers.  Someone should
be able to convert GCC's IR or AST to Forth.

Anyway, my suggestion would be to modify an existing project which
parses C correctly, e.g., GCC, and convert the intermediate code
produced by such a compiler to Forth.  Less work.  More accurate.


Rod Pemberton
-- 
The Paris Agreement is irrelevant. A carbon tax is futile. The only
solution is technology. Please tell Elon Musk that he is not being a
technology visionary.

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Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-03 09:09 +0000
  Re: Astronomy and programming languages krishna.myneni@ccreweb.org - 2017-06-03 04:38 -0700
    Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-03 13:45 +0000
      Re: Astronomy and programming languages krishna.myneni@ccreweb.org - 2017-06-03 08:46 -0700
      Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-03 18:49 +0000
    Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-03 18:48 +0000
      Re: Astronomy and programming languages krishna.myneni@ccreweb.org - 2017-06-03 13:33 -0700
        Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-03 22:34 +0000
        Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-04 03:05 -0500
  Re: Astronomy and programming languages krishna.myneni@ccreweb.org - 2017-06-03 05:58 -0700
    Re: Astronomy and programming languages krishna.myneni@ccreweb.org - 2017-06-03 06:01 -0700
    Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-03 13:37 +0000
      Re: Astronomy and programming languages foxaudioresearch@gmail.com - 2017-06-03 07:28 -0700
        Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-10 17:31 +0000
      Re: Astronomy and programming languages mhx@iae.nl - 2017-06-03 08:21 -0700
        Re: Astronomy and programming languages Julian Fondren <julian.fondren@gmail.com> - 2017-06-03 12:01 -0700
          Re: Astronomy and programming languages mhx@iae.nl - 2017-06-03 13:09 -0700
          Re: Astronomy and programming languages mhx@iae.nl - 2017-06-03 13:20 -0700
            Re: Astronomy and programming languages Brad Eckert <hwfwguy@gmail.com> - 2017-06-03 18:30 -0700
            Re: Astronomy and programming languages Brad Eckert <hwfwguy@gmail.com> - 2017-06-03 18:43 -0700
              Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-10 17:52 +0000
            Re: Astronomy and programming languages Julian Fondren <julian.fondren@gmail.com> - 2017-06-03 19:15 -0700
              Re: Astronomy and programming languages mhx@iae.nl - 2017-06-04 00:19 -0700
            Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-10 17:39 +0000
  Re: Astronomy and programming languages NN <november.nihal@gmail.com> - 2017-06-03 06:57 -0700
    Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-03 14:48 +0000
      Re: Astronomy and programming languages NN <november.nihal@gmail.com> - 2017-06-03 11:12 -0700
        Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-06 06:28 -0700
          Re: Astronomy and programming languages minforth@arcor.de - 2017-06-06 06:56 -0700
          Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 19:40 +0000
          Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-08 05:10 -0500
            Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-08 04:28 -0700
              Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-08 07:20 -0500
              Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-09 04:08 -0500
                Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-09 02:31 -0700
                Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-09 03:54 -0700
                Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-09 05:00 -0700
                Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-09 04:03 -0700
                Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-09 08:37 -0500
                Re: Astronomy and programming languages hughaguilar96@gmail.com - 2017-06-09 09:27 -0700
      Re: Astronomy and programming languages Cecil Bayona <cbayona@cbayona.com> - 2017-06-03 13:49 -0500
        Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-04 03:11 -0500
          Re: Astronomy and programming languages Paul Rubin <no.email@nospam.invalid> - 2017-06-04 17:20 -0700
            Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-07 03:10 -0500
              Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 19:41 +0000
                Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-08 11:48 +0000
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:25 +0000
              Re: Astronomy and programming languages Paul Rubin <no.email@nospam.invalid> - 2017-06-10 00:31 -0700
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-10 08:18 +0000
                Re: Astronomy and programming languages Paul Rubin <no.email@nospam.invalid> - 2017-06-16 00:23 -0700
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-16 07:40 +0000
                Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-11 02:21 -0500
                Re: Astronomy and programming languages Brad Eckert <hwfwguy@gmail.com> - 2017-06-14 23:36 -0700
      Re: Astronomy and programming languages Cecil Bayona <cbayona@cbayona.com> - 2017-06-03 13:53 -0500
  Re: Astronomy and programming languages mhx@iae.nl - 2017-06-03 08:04 -0700
    Re: Astronomy and programming languages rickman <gnuarm@gmail.com> - 2017-06-03 11:29 -0400
    Re: Astronomy and programming languages krishna.myneni@ccreweb.org - 2017-06-03 08:55 -0700
  Re: Astronomy and programming languages Brad Eckert <hwfwguy@gmail.com> - 2017-06-03 09:57 -0700
    Re: Astronomy and programming languages Paul Rubin <no.email@nospam.invalid> - 2017-06-03 10:35 -0700
    Re: Astronomy and programming languages Lars Brinkhoff <lars.spam@nocrew.org> - 2017-06-03 19:44 +0200
  Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-03 10:15 -0700
    Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-06 06:20 -0700
      Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-06 07:13 -0700
        Re: Astronomy and programming languages minforth@arcor.de - 2017-06-06 08:21 -0700
          Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-06 09:05 -0700
        Re: Astronomy and programming languages Paul Rubin <no.email@nospam.invalid> - 2017-06-06 23:49 -0700
          Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-07 00:58 -0700
        Re: Astronomy and programming languages Rod Pemberton <NeedNotReplyHere@xrsevnneqk.cem> - 2017-06-07 16:05 -0400
          Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 20:26 +0000
            Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-07 14:00 -0700
              Re: Astronomy and programming languages hughaguilar96@gmail.com - 2017-06-07 15:46 -0700
              Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 23:06 +0000
                Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-08 01:24 -0700
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:27 +0000
              Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-07 23:08 +0000
                Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-07 22:26 -0700
                Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-08 01:29 -0700
                Re: Astronomy and programming languages Rod Pemberton <NeedNotReplyHere@xrsevnneqk.cem> - 2017-06-08 08:28 -0400
                Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-08 08:02 -0700
                Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-08 01:26 -0700
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:30 +0000
              Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-08 05:17 -0500
                Re: Astronomy and programming languages Mark Wills <markwills1970@gmail.com> - 2017-06-08 04:37 -0700
                Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-08 07:28 -0500
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:33 +0000
            Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-08 11:46 +0000
              Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:35 +0000
                Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-10 02:18 -0500
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-10 07:54 +0000
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-10 08:00 +0000
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-10 08:38 +0000
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-11 17:53 +0000
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-11 18:03 +0000
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-11 18:17 +0000
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-11 18:23 +0000
                Re: Astronomy and programming languages Alex <alex@rivadpm.com> - 2017-06-11 19:21 +0100
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-11 18:24 +0000
                Re: Astronomy and programming languages Alex <alex@rivadpm.com> - 2017-06-11 19:28 +0100
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-11 19:04 +0000
                Re: Astronomy and programming languages Alex <alex@rivadpm.com> - 2017-06-11 21:13 +0100
                Re: Astronomy and programming languages Alex <alex@rivadpm.com> - 2017-06-11 21:22 +0100
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-12 03:11 +0000
                Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-12 07:38 +0000
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-12 08:13 +0000
                Re: Astronomy and programming languages Alex <alex@rivadpm.com> - 2017-06-12 11:22 +0100
                Re: Astronomy and programming languages Alex <alex@rivadpm.com> - 2017-06-12 11:48 +0100
                Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-12 13:58 +0000
                Re: Astronomy and programming languages Melzzzzz <Melzzzzz@zzzzz.com> - 2017-06-13 02:19 +0000
                Re: Astronomy and programming languages anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-10 13:16 +0000
                Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-11 17:53 +0000
            Re: Astronomy and programming languages Rod Pemberton <NeedNotReplyHere@xrsevnneqk.cem> - 2017-06-08 08:28 -0400
              Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 17:38 +0000
  Re: Astronomy and programming languages Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-03 12:23 -0500
  Re: Astronomy and programming languages Paul Rubin <no.email@nospam.invalid> - 2017-06-03 10:27 -0700
  Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-03 18:46 +0000
  Re: Astronomy and programming languages Julian Fondren <julian.fondren@gmail.com> - 2017-06-03 12:42 -0700
    Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-03 22:24 +0000
      Re: Astronomy and programming languages Julian Fondren <julian.fondren@gmail.com> - 2017-06-03 15:34 -0700
        Re: Astronomy and programming languages "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-03 22:55 +0000
  Re: Astronomy and programming languages Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-10 10:27 -0700
  A Small Challenge (Re: Astronomy and programming languages) Joel Rees <joel.rees@gmail.com> - 2017-06-12 22:20 -0700
    Re: A Small Challenge (Re: Astronomy and programming languages) Paul Rubin <no.email@nospam.invalid> - 2017-06-12 22:52 -0700
    Re: A Small Challenge (Re: Astronomy and programming languages) Rod Pemberton <NeedNotReplyHere@xrsevnneqk.cem> - 2017-06-13 10:04 -0400
    Re: A Small Challenge (Re: Astronomy and programming languages) minforth@arcor.de - 2017-06-13 07:30 -0700
    Re: A Small Challenge (Re: Astronomy and programming languages) Cecil Bayona <cbayona@cbayona.com> - 2017-06-13 10:52 -0500

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