Re: Why is 4+ legal?

Hi!

     I totally agree with the idea of taking the + off the list of double
number flags. There is
NO REASON to let it be there.

     Best Regards,

     Jach Fong
     Caprilion Enterpise Co.

At 09:13 AM 2001/6/1 -0700, you wrote:

> To deal with the ED class of problem on one project we had a rule that
>numbers had to start with 0, like 0ED and NOTHING ELSE could start with a 0.
>The first few integers 00, 01, 02, etc. were defined and the 0, 1 and 2
>definitions removed. This caused problems for one of my colleagues who was
>just learning C and carried the habit over where he learned what C thought
>0321 meant the hard way. This was a system which only had HEX and DECIMAL
>and no $ flag for hex numbers.
> You can't always tell the customer what he's doing wrong or change the
>standard to avoid all awkwardness. ED frequently starts the editor and I
>guess $ED could be some sort of editor string. Perhaps all hex numbers
>should start with $ and NOTHING ELSE should.
> So 1+ is an increment and 4+ is a double number. 2+ is a coin toss
>which caught me a while back when I didn't see it in some great code Leon
>wrote. Maybe we should take + off the list of double number flags. Has
>anyone ever used it or seen it used?
>
> > ----------
> > From: David Graham[SMTP:dgraham_at_GrahamAutomationInc.com]
> > Reply To: swiftx_at_forth.com
> > Sent: Wednesday, May 30, 2001 12:25 PM
> > To: swiftx_at_forth.com
> > Subject: [swiftx] Re: Why is 4+ legal?
> >
> >
> > I wanted to report a peculiar feature of SwiftX 3.0, HC12
> > version. The compiler accepts n+ or n-, where n is any numeric
> > digit, as a legal definition, and leaves n 0 in the stack. I just caught
> > by
> > this when I mistyped 4 + as 4+.
> >
> > Regards,
> > David Graham
> > Graham Automation, Inc.
> > PO Box 623
> > McMinnville, OR 97128
> > (503) 434-8636 Fax (503) 212-0181
> > dgraham_at_GrahamAutomationInc.com
> >
> >
> > > Hi David,
> > >
> > > That's an artifact of the standard Forth double number conversion.
> > Always
> > > be very careful with anything that might accidentally be converted to a
> > > number! One of our competitor's systems defines two words, ED
> > > and $ED which
> > > conflict with hex numbers of the same value. Drives me crazy.
> > >
> > > Leon
> >
> >
> > ----------------------------------------------------------------------
> > swiftx_at_forth.com The SwiftX programming discussion email list
> > To unsubscribe, send subject "unsubscribe swiftx" to listar_at_forth.com
> > For help with listar commands, send subject "help" to listar_at_forth.com
> > Archives are located at http://www.forth.com/swiftx -- check them out!
> >
>----------------------------------------------------------------------
>swiftx_at_forth.com The SwiftX programming discussion email list
>To unsubscribe, send subject "unsubscribe swiftx" to listar_at_forth.com
>For help with listar commands, send subject "help" to listar_at_forth.com
>Archives are located at http://www.forth.com/swiftx -- check them out!

----------------------------------------------------------------------
swiftx_at_forth.com The SwiftX programming discussion email list
To unsubscribe, send subject "unsubscribe swiftx" to listar_at_forth.com
For help with listar commands, send subject "help" to listar_at_forth.com
Archives are located at http://www.forth.com/swiftx -- check them out!
Received on Fri Jun 01 2001 - 18:35:49 PDT