From: Pit Capitain <pit@...>
Date: 2005-04-21T02:29:19+09:00
Subject: Re: Linear complete variation of MatchData#to_a, possible?

Trans schrieb:
> 
> Your nesting will work too. I excluded a couple layers were I felt it
> wasn't significant. I think the pre and post matches can just be the
> first and last elements respectively, so another that nesting isn't
> relly needed (IMHO). But you may be quite right about the next layer. I
> had thought it might be dropped without issue, but perhaps it is in
> fact neccessary to keep the nesting consistant with the subexpressions.
> Nonetheless, yes, you have the idea. Can it be done? I'm not sure how
> one would "query" the level of subexpression nesting.

Hi Tom,

I'd try using MatchData#begin and MatchData#end:

   md = /(1)(2(3))(4)/.match( "012345" )

   md.size.times do |i|
     puts( md.begin( i ) .. md.end( i ) )
   end

The output is:

   1..5
   1..2
   2..4
   3..4
   4..5

It should be possible to determine the splitting and the nesting out of 
those numbers. If you're not successful, send me a mail and I'll try to 
find some more time to help.

Regards,
Pit