[REBOL] Re: localized func alternative...
From: tim:johnsons-web at: 27-Feb-2004 16:55
* Maxim Olivier-Adlhoch <[maximo--meteorstudios--com]> [040227 14:05]:
> Hi all,
>
> Has anyone programed an alternative to func (function, has, does) which declares every
set-word as local by default?
>
> I find rebol's liberal use of global namespace to be the most limiting factor in scaling
rebol to large tools.
No kidding. There much be a reason, but I dunno why.....
> I'd rather have to define global words than local words (especially in api tools).
; Below is code that I use. It is developed by Andrew Martin with the
; last mod by me. I believe that Ladislav has a 'fun also...
make object! [
Find-Locals: function [Locals [block!] Body [block!] Deep [none! logic!]] [Value] [
parse Body [
any [
set Value set-word! (
if not found? find Locals Value: to word! :Value [
insert tail Locals Value
]
)
| set Value block! (
if Deep [
Find-Locals Locals Value Deep
]
)
| skip
]
]
Locals
]
set 'Fun function [
"Automatic local word generation for a function."
Spec [block!] {Optional help info followed by arg words, optional type and string.}
Body [block!] "The body block of the function."
/Deep "Inspect block! values recursively for more local words."
][
Locals LocalRefinement
][
Locals: copy []
if found? LocalRefinement: find Spec /local [
insert Locals next LocalRefinement
Spec: copy/part Spec LocalRefinement
]
Find-Locals Locals Body Deep
Locals: exclude Locals Spec
function Spec Locals Body
]
set 'Sub :Fun
]
def: sub[Spec[block!] Body[block!]][sub/deep Spec Body] ; added by Tim
> There is MUCH less chance that incidious errors will be generated or exposed.
Enjoy! I sure have. Kudos to Andrew and Ladislav
> A notable example is the recent S: variable useage in the sql tool which would not
have occured.
>
> TIA!
>
> -MAx
> ---
> "You can either be part of the problem or part of the solution, but in the end, being
part of the problem is much more fun."
>
> --
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--
Tim Johnson <[tim--johnsons-web--com]>
http://www.alaska-internet-solutions.com
