World: r3wp

As I haven't worked much with Dialects I wasn't terribly sure how 
to start, so was looking for some dialect examples that might influence 
my starting point.

well, first I'd build the skeleton for the dialect for parsing a 
single line. then I might add some actions to it and then expand 
it to handle multiple lines.

The first line of the volleyball page http://www.wnmu.edu/athletic/stats/07vb/29wnmu.htm#GAME.PLY
, the line starting 1-0,  _might_  be represented by the following 
keystrokes...
s43a23b50
So, 

s = set attempt, 4 = player Cola Svec, 3 = set attempt level 3 - 
perfect set

a = attack attempt, 2 = player Jeri Walkowiak, 3 = attack attempt 
level 3 - kill

b = block attempt, 5 = player Jessica Lindgren, 0 = block attempt 
level 0 - error

I might need to add a team designator like H = Home, V = visitor 
as it could be complicated to catch live play and may need to establish 
which team inorder to correctly identify a player.  I may also need 
to use a separator between each keystroke if I want to identify the 
player by jersey number.

I will need to start playing with this to see if I can come up with 
something and then maybe get some feedback on my attempts.  I don't 
know when I would get to this but thought I'd through it out there.

If this is typing in real time, space would be the best seperator,

anyone know how to parse this:

{<table><table></table><tr></tr></table>}

It is a table with an empty table inside, and also a Table-Cell

for some reason, using recursion...I just can't seem to put my finger 
on the right combo.

What's the goal?

parse rules that will give a true if parse/all {<table><table></table><tr></tr></table>} 
RULES

(using recursion)

like  Tables: [Table Tables | Table]

Table: ["<table>" Content "</table>"]

...and so forth.

rule: use [table row][
	row: [<tr> </tr>]
	table: [<table> any [table | row] </table>]
	[table]
]

As Robert de Niro said in one of my favorite movies of all time, 
"Analyze This"  "...hey, you...you're good!"

rfc: I have a (not so) little function that attempts to match a block 
of values to a given specification.  Example:

	>> probe match [%image.png :red 300x100 /old][
	[	file: file! | url!
	[	size: opt pair!
	[	attributes: any get-word! | refinement!
	[	]
	make object! [
		file: %image.png
		size: 300x100
		attributes: [:red /old]
	]


There's not much to the rules, they are -- one (default), opt (zero 
or one), any (zero or many), some (many).  If they don't match, they 
return an error.  Any suggestions?  Optimizations?

	http://www.ross-gill.com/r/match.r

Ways of making it smaller???

One of the desired effects is precedence, for example:

	match [http://rebol.com%image.png][
		link: file! | url!
		image: file! | url!
	]

Returns:

	[link: http://rebol.comimage: %image.png]

I do something like that, but text based, in QML. not sure if it 
can be of any help.

.

What's the best approach to support normal Rebol things like FOREACH, 
IF, ANY, ALL and set-words, get-words within a dialect? I don't want 
to write Rebol parse rules for this.

Example: parse XYZ mydialect

XYZ: [
	repeat x 1 14 [
		a: get-point x 7
		set-point 7 x (a * 2)
	]
]
]

get-point and set-point are the dialect things. The rest should be 
normal rebol.

Is there a best practice how to get Rebol control structure support 
into dialects?

but isn't this just a regular rebol code block then .. a: get-point 
x 7 and set-point looks like a normal rebol func too?

Just assume that get-point and set-point is done via a dialect.

aha, I would also like to know if that is possible .. I still haven't 
figured out how they do ( some code ) in parse

Use Gab's compile-rules module.

Gab = Gabriele

Robert, if you don't want to use parse rules you might try DO/next. 
Don't use DO/next (or Gabriele's compile-rules) if your dialect data 
can come from an untrusted source - use parse rules and dialect operations 
that call the REBOL functions if necessary.

But *only* the REBOL functions that you want to support and can do 
so safely.

You can't make that restriction with DO/next or Gabriele's compile-rules 
without a sandbox - hard to do in R2.

Check out the source of the R2's layout function.
?? layout

Brian: I think, that Rbert wants to use parse rules. The question 
is, what is the best way how to setup such a rules.

compile-rules: Ok, will take a look at it.

The other option would be not to use a dialect at all and create 
normal functions for everything. But I like dialects :-)

Robert, in compile-rules, INTERPRET is what you want to look at.

Brian: so, see, even normal people want DO in PARSE, and not only 
that, they want all the control structures... look at compile-rules 
how much effort that is. :-)

Gab, where can I find the script?

I found it here http://www.colellachiara.com/soft/PDFM2/compile-rules.r
but I don't know if it's uptodate.

Ok, found version 1.40 on my system.

History states a version 1.50...

Just because normal people want DO in PARSE doesn't make it a good 
idea. Little girls want a pony, but it's not a good idea if they 
live in an apartment. DO in PARSE would be a feature that couldn't 
be used most of the time because of its security problems.

:)

A better analogy might be little boys asking for a machine gun though 
:(

Please no : keep the pony !

That's why I ony want some control structures routed into the dialect 
context.