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Subject: Re: Regex query
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Date: 20 Sep 2002 08:06:39 +0100
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From: si...@ermine.ox.ac.uk (Simon Cozens)

u...@stemsystems.com (Uri Guttman) writes:
> shouldn't that have a <sp*> inside the blank line?

Or <sp>*, yes.
 
>   SC> rule comm_eol { <sp*> <comment>? <sp*> \n };
> 
> aren't those <sp*>'s redundant? the first is overlapping with the one at
> the beginning of comment.

But <comment> only matches if there *is* a comment, and there may not
be, so I want to match optional space at the EOL anyway.

>   SC> rule raiddev { <comment>*
> i think that should be comm_eol as you want to skip all full comment lines.

I thought the .* (or \N*) would skip the whole line. comm_eol just means
"comment at end of line".
 
> i think that char class should be <[a-z-]>. <[]> marks a class and the -
> needs to be inside it.

Oops, typo.
 
> the second <sp>* should be <sp>+ as you need whitespace between the
> option and value.

Yes.
 
>   SC> rule devicelayout { <sp>* device <sp>+ $name := (/dev/\w+) <comm_eol> 
> the \w+ after /dev/ needs to be more accepting as i think some devices
> could be in subdirs
 
No, by stipulation. :) This is Linux, without devfs.

> that is how i understand it. the grammar automatically build a tree of
> the grabs with hash keys being the rule names and multiples (rules with
> quantifiers) being arrays. 

Great.

-- 
You advocate a lot of egg sucking but you're not very forthcoming with the 
eggs. - Phil Winterbottom (to ken)