Re: [Amforth] New forth interaction script

[Keith A. <ca...@pi...>]

{-- Tue, 03 Jul 2012 20:02:55 +0200: Matthias <mt...@we...> wrote: --}
  Matthias> Editing the source files builds a rather high barrier for
  Matthias> your excellent tool. For me your ideas sound like
  Matthias> introducing concepts like Design By Contract
  Matthias> (http://en.wikipedia.org/wiki/Design_by_contract). Something
  Matthias> the Forthers do not (yet?) think about.

Actually, my motivation was a lot simpler.  I wasn't sure if the regular
expression I use to match an error being indicated by the amforth
interpreter really covered all cases.  That expression (without the
delimiting double quotes included below) is:
  
   " \?\? -\d+ \d+ \r\n> $"

Is it correct?  I spent some time looking at the main interpreter trying
to verify it but I don't read assembly and forth fluently enough yet to
be sure without investing more time than I had available.

If the above regular expression will catch all errors explicitly
indicated by the interpreter, then I think it would be reasonable to
change the default behavior to *not* generate an error on output as it
*will still generate an error* if the error regular expression matches.

This won't cause an upload of a tester.frt based test file to fail on
the first test that has an error which I really want for the class in
which we're using this, but I can easily get that behavior by adding the
comment at the top of the file for those cases.

  Matthias> I collect the changes in the repository at
  Matthias> http://amforth.svn.sourceforge.net/viewvc/amforth/trunk/tools/amforth-term.py?view=log

Wonderful.  I don't really see any need for this to live outside the
amforth repository, so if I get a chance to make further improvements
I'll prepare patches against the code there.

    --- Keith