[REBOL] Re: lisp-like backquotes macros
From: henri:morlaye:g:mail at: 26-Nov-2005 13:19
> Probably Ladislav's BUILD will help; anyway, sometimes it is
> possible to refactor your code so that you don't need it.
>
> In the case above, for example, you could write:
>
> compose [(value1) to-string 2 + (to-integer value2)]
>
> (Well, actually, in this specific case you could just write:
>
> reduce [value1 to-string 2 + to-integer value2]
>
> because there's no reason to do the add and the string conversion
> at "runtime", but I assume it's just because this is a simplified
> example.)
I don't want it to be done at runtilme. The value is in fact the name
of a variable, I create a standard block for a standard function, and
then I create several functions using different variables by
replicating/compositing the standard block.
> Also, REBOL offers another way to obtain the same goal without
> composing at all.
>
> use [value1' value2'] [
> value1': value1
> value2': to-integer value2
> [value1' to-string value2' + 2]
> ]
> Using a function like my LOCALIZE in:
>
> http://www.colellachiara.com/soft/Libs/utility.r
>
> localize [value1 value2] [
> [value1 to-string 2 + to-integer value2]
> ]
>
> The solutions here do not solve all the cases, especially when you
> are composing PARSE rules; but they can give you ideas.
>
Thank you very much, utility.r and build.r are nice, I will probably
find a solution with them, nevertheless they all seem like workarounds
for the lack of backquotes macros, I still don't understand why
RebolTech decided to use parens for compose. The lispy method seems so
much more comfortable, and more accurate with the use of "-" only when
needed instead of the "/only".
--
henri
