[REBOL] Re: parse again
From: rebol:techscribe at: 29-Dec-2000 0:59
Hi Graham,
Parsing is very simple. It takes a minimal effort. And you always know
exactly what you are doing. If you are writing parse rules and any of
these statements do not make sense, then you have uncovered a conceptual
bug.
For block parsing you should consult with Chapter 22 (REBOL Dialecting).
A simple solution to your problem using block parsing would be:
test: [9:00 am Get up 9:30 am Eat breakfast 10:00 am Read email]
sp: does [prin " "]
rule: [set t time! (prin t sp) set ampm word! (prin ampm sp) some [ set
activity word! (prin activity sp) ] (prin newline)]
>> parse test [some rule]
9:00 am Get up
9:30 am Eat breakfast
10:00 am read email
Doing it with a string is not much more difficult:
digits: charset "0123456789"
test: {9:00 am Get up 9:30 am Eat breakfast 10:00 am read email}
rule: [ (print "") begin: 1 2 digits ":" 2 digits end: (prin copy/part
begin end) | here: skip (prin here/1) ]
>> parse/all test [some rule]
9:00 am Get up
9:30 am Eat breakfast
10:00 am read email
Hope that helps,
Elan
Graham Chiu wrote:
