Hi.
Lets take a look at some common Forths, Revision appended.
They do it in the typed order left to right.
Only VFX does it top down linewise, like amforth in its older days.
Though not a "standard", typed order is "Normative Kraft des
Faktischen".
(google: "normative power of the factual")
Brodies I like best. Unfortunately he does not tell us how the
negative numbers are treated.
Regards, Michael
:-)
-
Revision of Examples
gforth:
11 -22 33 .s <3> 11 -22 33 ok
win32forth:
11 -22 33 .s [3] 11 -22 33 ok...
(with a dot for each item, none if empty stack)
VFX Forth for Windows IA32:
11 -22 33 .s
DATA STACK
top
33 0000:0021
-22 FFFF:FFEA
11 0000:000B
ok-3
SwiftX MSP430 EVALUATION 3.5.9 12-Apr-2011:
11 -22 33 .s
11 -22 33 <-Top ok
And last but not least, the Masters Voice:
Starting Forth by Leo Brodie - Chapter 2
http://www.forth.com/starting-forth/sf2/sf2.html
<snip>
A Handy Hint
A Non-destructive Stack Print
Beginners who are just learning to manipulate numbers on the stack in
useful ways very often find themselves typing a series of dots to see
what's on the stack after their manipulations. The problem with dots,
though, is that they don't leave the numbers on the stack for future
manipulation.
The Forth word .S prints out all the values that happen to be on the
stack "non-destructively"; that is, without removing them. Let's test
it, first with nothing on the stack:
.S <0> ok
As you can see, in this version of .S, we see at least one number.
This is the number of items actually on the stack.
Now let's try with numbers on the stack:
1 2 3 .S <3> 1 2 3 ok
ROT .S <3> 2 3 1 ok
</snip>
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