From: Tanaka Akira <akr@...17n.org>
Date: 2003-04-17T02:40:40+09:00
Subject: Re: regular expressions

In article <041c01c3042f$2105ad20$0300a8c0@austin.rr.com>,
  "Hal E. Fulton" <hal9000@hypermetrics.com> writes:

> I would have done it something like this:
>
>   myreg = RegexLang.new(<<EOF)
>   # This would be a full-featured regex
>   # language "script" with keywords instead
>   # of punctuation; comments allowed; etc.
>   blah blah blah...
>   EOF
>
>   myreg.is_a? Regexp    # true
>
>   # And so on...

I wrote such library: [RAA:abnf].

It can be used as

myreg = /\A#{ABNF.regexp <<'End'}\z/o
... ABNF(RFC2234) description ...
End

myreg.is_a? Regexp    # true

Of course, it handles only some (regular) subset of ABNF.
-- 
Tanaka Akira