[REBOL] Re: Refinements
From: greggirwin:mindspring at: 12-Nov-2002 12:02
Hi Robert,
RMM> Hi, I have a bunch of functions that have the same two refinements:
RMM> /left /right
RMM> How can I propagate refinements from a function when calling an other
RMM> function?
There is no easy, native, way that I know of. Ladislav has a REFINED
function in his highfun.r script, if that will work for you. Sometimes
I've added a refinment which allows me to specify a block of custom
options (i.e. refinements) for easy propagation. Here's the basic
idea:
my-func: func [/with options [any-block!] /local ?opt] [
either with [
attempt [ ;<< ATTEMPT requires beta release or patch
if find options 'a [print "option A specified"]
if options/b [
print ["option B specified. Value =" options/b]
]
]
][
print "no options"
]
]
my-func
my-func/with [a]
my-func/with [b 2]
my-func/with [a b 2]
Not nearly as clean as native refinements, but much easier to
propagate.
-- Gregg
