23 Jun
2006
23 Jun
'06
5:26 p.m.
One could add one more level to the typical forth
interpreter. Most
Forth interpreters first check to see it the word is in the dictionary.
If it is not there, it would see if it could be a number. If not
that, it must be an error.
One could add one additional level to cause a word to be placed
on a sting stack or string buffer.
Something like:
Hello$ World$ 2 $type
would replay with:
Hello World
When I was toying with interpreted Forth (Don't ask;), I simply had
the parser take everything from the first quote till the last quote as
one memory object, and shove it on the stack as a string for the
interpreter loop. (This is how some mission-specific Forth-like
dialects do it). Is that "read-ahead"? I know it doesn't help the
lack of punctuation any.
Example:
: Hi
"Hello world" me @ swap notify
;
Obviously not a professional programmer,
Josef
--
"I laugh because I dare not cry. This is a crazy world
and the only way to enjoy it is to treat it as a joke."
-- Hilda "Sharpie" Burroughs,
"The Number of the Beast" by Robert A. Heinlein