[REBOL] Re: idioms to reduce logic clutter ?

From: greggirwin:mindspring at: 12-Oct-2002 10:16

Jason, et al

I agree with those who have already replied. Combining the various
strategies mentioned will no doubt give you lots of options to play with.
Here's a little snippet used in prebol.r from RT. The messages in-line are
small, but could be broken out as Joel suggests as well.

if not all [
	msg: "Missing input file name argument"
	in-file
	msg: "Input file not found"
	exists? in-file
	msg: "Missing output file name argument"
	out-file
	msg: "Input file is not a REBOL file"
	script? in-file
	msg: "Cannot load REBOL input file"
	not error? try [data: load/all in-file]
][
	error msg
]

--Gregg

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