bugGNU Octave - Bugs: bug #39424, regexp: nested parentheses returns...

 
 

bug #39424: regexp: nested parentheses returns more tokens than Matlab

Submitted by:  Rik <rik5>
Submitted on:  Sun 07 Jul 2013 09:52:48 PM UTC  
 
Category:  Libraries Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Matlab Compatibility
Status:  Confirmed Assigned to:  None
Originator Name:  Open/Closed:  Open
Release:  dev Operating System:  Any

Add a New Comment (Rich Markup)
   

You are not logged in

Please log in, so followups can be emailed to you.

 

Mon 21 Nov 2016 10:14:47 PM UTC, comment #1: 

Octave still behaves the same in version 4.2.0.

Hartmut <hardy>
Sun 07 Jul 2013 09:52:48 PM UTC, original submission:  

According to Matlab documentation,

Note:   If an expression has nested parentheses, MATLAB captures tokens that correspond to the outermost set of parentheses. For example, given the search pattern '(and(y|rew))', MATLAB creates a token for 'andrew' but not for 'y' or 'rew'.

Octave, following PCRE, creates a token for every subpattern which matches.

regexp ('andrew', '(and(y|rew))', 'tokens')
ans =
{
  [1,1] =
  {
    [1,1] = andrew
    [1,2] = rew
  }
}

The solution probably means re-writing the pattern before passing it off to PCRE.

Rik <rik5>
Project Administrator

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:
   
   
Comment:
   

No files currently attached

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -email is unavailable- added by hardy (Posted a comment)
  • -email is unavailable- added by rik5 (Submitted the item)
  •  

    Do you think this task is very important?
    If so, you can add your encouragement to it.
    This task has 0 encouragements so far.

    Only project members can vote.

     

     

     

    No changes have been made to this item

    Back to the top


    Powered by Savane 3.5