[REBOL] Re: Parsing comment
From: g:santilli:tiscalinet:it at: 25-Sep-2002 11:23
Hi Andrew,
On Wednesday, September 25, 2002, 8:09:38 AM, you wrote:
AM> And use it like:
>>> 0 != 2
AM> == true
>>> 4 != 4
AM> == false
That actually works because '!= is defined inside REBOL, to avoid
RT folks headaches when switching between C and REBOL.
>> sum: :+
>> 1 sum 2
** Script Error: sum expected value2 argument of type: number pair char money date time
tuple
** Where: halt-view
** Near: sum 2
AM> But I don't know how to make other infix operator functions. It would be
AM> nice to have them. I've got at least one application for it.
Indeed, it would be much better to have a generic mechanism to
define/undefine operators. I might want to avoid them for some
reason in one expression, so I should be able to disable that
processing in some way. Also, if I wanted to add an operator word,
I should have a way to add it to the list of words that are
considered operators by the interpreter.
Regards,
Gabriele.
--
Gabriele Santilli <[g--santilli--tiscalinet--it]> -- REBOL Programmer
Amigan -- AGI L'Aquila -- REB: http://web.tiscali.it/rebol/index.r
