Mailing list for all users of the OCaml language and system.
 help / color / mirror / Atom feed
From: "Jake Donham" <jake.donham@skydeck.com>
To: caml-list@yquem.inria.fr
Subject: Re: ocamllex regexp problem
Date: Wed, 19 Mar 2008 09:39:41 -0700	[thread overview]
Message-ID: <c7e4e9f0803190939o2d916af2y11535fc2209c0a17@mail.gmail.com> (raw)
In-Reply-To: <c7e4e9f0803181903p49ab284h8ad74e8021be2ccd@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 577 bytes --]

On Tue, Mar 18, 2008 at 7:03 PM, Jake Donham <jake.donham@skydeck.com>
wrote:

>   let ends_sq = [^']']* ']'
>   let ends_sq_sq = ends_sq ([^']'] ends_sq)* ']'+
>   let ends_sq_sq_ang = ends_sq_sq ([^'>'] ends_sq_sq)* '>'


My colleague Haoyang Wang points out that my regexp, when viewed
nondeterministically, matches "foo]]]>bar]]>", since ']'+ may match only
"]]", then [^'>'] matches the third "]". Changing it to [^'>'']'] repairs
it. So I guess the answer is that Micmatch on PCRE treats the regexp as
greedy, while ocamllex does not.

Thanks to those who replied,

Jake

[-- Attachment #2: Type: text/html, Size: 981 bytes --]

      parent reply	other threads:[~2008-03-19 16:39 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-19  2:03 Jake Donham
2008-03-19  9:00 ` [Caml-list] " Michael Wohlwend
2008-03-19 15:21 ` Martin Jambon
2008-03-19 16:39 ` Jake Donham [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=c7e4e9f0803190939o2d916af2y11535fc2209c0a17@mail.gmail.com \
    --to=jake.donham@skydeck.com \
    --cc=caml-list@yquem.inria.fr \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox