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World: r3wp

[Parse] Discussion of PARSE dialect

Volker
13-Aug-2005
[276x2]
s: "Hello cè World" 
es: charset[#"e" #"è"#"è"#"ê"#"i"#"î" #"y"]

parse/all s [ to "c" p: skip es p2: ( p: change/part p "s" p2 ) :p 
]
? s
questions: 
-long string? then better copy instead of change/part
-more patterns in same path, then not 'to.
shadwolf
13-Aug-2005
[278]
Volker that's not what I want to get ...

I'm seeking a rebol ruke that allow me to test the character after 
a key char example #"c" but keeping it into the parsing stack
Volker
13-Aug-2005
[279]
you know p: and :p in parse-rules?
shadwolf
13-Aug-2005
[280]
k I will try it thank u :)
BrianW
13-Aug-2005
[281]
yargh. I know how to split with a single character as the delimiter:

	chunks: parse/all text "^/"


How do I split where a blank line (2 newlines with nothing in between) 
is the delimiter? The naive solution I can think of just doesn't 
work:

	chunks: parse/all text "^/^/"
Graham
13-Aug-2005
[282x2]
you can make up a rule.
lines: copy []
rule: [ copy txt to "^/^/" (append lines txt) skip 2 ]
parse mytext [ some rule ]

untested ...
BrianW
13-Aug-2005
[284]
I get lost trying to find a good way to describe my rule. Here's 
the bad code that states my intent, but doesn't work ('parse doesn't 
seem to like having that 'until in there)

chunks: parse/all text [
	until [
		chunk: copy ""
		copy chunk to "^/^/"
		skip
		if chunk [
			append chunks chunk
		]
	] 
]
Graham
13-Aug-2005
[285]
ummm.. don't think you can do that
BrianW
13-Aug-2005
[286]
nope, I discovered that :-D
Graham
13-Aug-2005
[287x4]
parse expects to see a parse dialect if you following it with a block
try my way ...
and your code is mixing rebol code with the parse dialect.
Rebol code has to be in ( ) when used within the dialect
BrianW
13-Aug-2005
[291]
oh okay. I understand that now.
Graham
13-Aug-2005
[292]
that should be

parse/all mytext [ some rule ]
BrianW
13-Aug-2005
[293]
thanks
Graham
13-Aug-2005
[294]
np
BrianW
13-Aug-2005
[295x2]
Hm. Still having issues:

>> rule: [ copy chunk to "^/^/" (append lines chunk) skip 2 ]
== [copy chunk to "^/^/" (append lines chunk) skip 2]
>> text: "Dude.^/^/Sweet!^/"
== "Dude.^/^/Sweet!^/"
>> lines: copy []
== []
>> parse/all text rule
** Script Error: Invalid argument:
** Near: parse/all text rule
>>
oh, wait.
Graham
13-Aug-2005
[297]
oops .. should be "2 skip" and not "skip 2"
BrianW
13-Aug-2005
[298x2]
That's okay, I forgot to include the possibility that there would 
be only one line, so my tests were blowing up somewhere else.
Hm, that misses the last line if the text doesn't end in "^/^/"
Graham
13-Aug-2005
[300]
easy enough .. add {^/^} to end of text before parsing
BrianW
13-Aug-2005
[301x2]
That *is* a nice and easy solution, thanks a lot!
sweet, all my tests pass now. Time to add more tests :-)
Graham
13-Aug-2005
[303]
sometimes I find it easier to change the data than to change the 
rule :)
BrianW
13-Aug-2005
[304x2]
Hey, as long as it works.
Working on a textile parser over here to build my 'parse skills and 
make it easier to build my website with Rebol
Graham
13-Aug-2005
[306]
not that you shouldn't do it, but I use http://www.rebol.it/~steel/retools/remark/
BrianW
13-Aug-2005
[307]
I'm <>-phobic ;-)
Graham
13-Aug-2005
[308]
Remark takes care of all of those taggy things
BrianW
13-Aug-2005
[309]
and all of my pages are already in textile format, and I think a 
few of my friends would be more interested in Rebol if I had a textile 
parser for them
Graham
13-Aug-2005
[310]
what's textile ?  A type of fabric ?
BrianW
13-Aug-2005
[311]
http://hobix.com/textile/
Graham
13-Aug-2005
[312]
A structured text variant ...
BrianW
13-Aug-2005
[313x2]
yep
I like some of the different structured text formatting systems
shadwolf
14-Aug-2005
[315]
Volker thank you it works great now and the code rule is tiny ;)
Volker
14-Aug-2005
[316]
:)
BrianW
18-Aug-2005
[317]
Any parse suggestions for trying to find #"(" without a matching 
#")" in text that might also have proper pairs of parens?
Henrik
18-Aug-2005
[318]
you probably need to count them and see where you end up after finding 
all parens. I'm not sure if it can be used to see which are missing...
BrianW
18-Aug-2005
[319]
That would probably work fine. This if for the textile parser, where 
a declaration like "p(." means a paragraph with left margin of 1em, 
repeated for additional ems of margin. Counting will be quite useful.
Henrik
18-Aug-2005
[320]
count one up on #"(" and one down on #")". If correct, the end result 
is zero.
BrianW
18-Aug-2005
[321x3]
thanks
Perfect, Henrik. That took me exactly where I needed to go for this 
feature.
Gonna have to work on my test-simple.r script soon to provide better 
summaries. The number of tests that are passing in this thing is 
getting rather large!
BrianW
22-Aug-2005
[324]
Any tips on how to convert " *text* " to " <strong>text</strong>"?
Sunanda
22-Aug-2005
[325]
One way:
   replace text "*" <strong>
   replace text "*" </strong>

If there are multiple pairs of "*", repeat in a loop until the length 
no longer changes