Re: THROW codes and ambiguous conditions

On 7/06/2025 7:43 pm, Anton Ertl wrote:

sean@conman.org writes:

 Why not?  This was a learning experience for me, as this is my first
actual Forth implementation [1].  The ANS Forth 2012 standard gave me a
target to aim for.  Guess I shouldn't have bothered then.

 
Don't let the usual naysayers discourage you.  You took your choices,
based on reasonable criteria, and you finished what you set out to do.
Great!
>

The Standard dates backs to 1977 starting out as
a list of words pulled from Kitt Peak Forth.  If KPF didn't have (.) etc well
that was just too bad.  The point being nobody sat down and systematically
designed the standard (or forth) ground up.  It was adhoc.  It's always been
adhoc.  Moore has changed his mind numerous times.  What one sees in the Standard
is a snapshot of 1977.

>
 It seems to have concepts that have occured after 1977, or are you
speaking of some other Forth Standard, like 79 or 83?

 
The cool thing about dxf is that he always criticizes the standard,
usually for innovations that he denounces as deviations from
traditional Forth values.  Criticizing the standard because of its
ancestry is a new twist in his postings.

The committees keep saying they're not responsible :)

Even small forths can do better than what the standard offers by simply factoring
out tools already present e.g.
>
(.)  (D.)  (U.)  /CHAR  >CHAR  >DIGIT  HELD  MU*  MU/MOD  TRIM  UNNEST
>
I'd rather have these than all the support for wordlists DEFER and other stuff
the standard and folks have obsessed over.

 
That's the more usual stance that dxf takes.
 

 Can you not implement them with ANS Forth?

 
He claims that these are already present in existing implementations,
only not standardized. For (.) (D.) (U.) that's certainly not the
case in Gforth.

I said the Standard hadn't factored them out.  Several forths of course
have factored them out.

As for /CHAR >CHAR >DIGIT HELD MU* MU/MOD TRIM
UNNEST, I don't know what they are supposed to do, so I cannot tell
whether Gforth has some factors that correspond to them.

In factoring out Standard words one is admitting the Standard is lacking.