[Octave-bug-tracker] [bug #59992] regexp: behaviour of \> (end of a word) inconsistent with MATLAB

[Rik]

Update of bug #59992 (project octave):

                  Status:                    None => Confirmed              
        Operating System:               GNU/Linux => Any                    

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Follow-up Comment #2:

Confirmed.

Octave uses the PCRE library (Perl Compatible Regular Expressions) for regular
expressions.  There is no end of word assertion in PCRE, so Octave substitutes
'\b' which detects a Word Boundary.  A Word Boundary, however, is defined as
word character followed by a non-word character.  Since '!' is not a word
character the test fails between '!' and '+'.

It may be that Matlab is using a positive lookahead assertion for a non-word
character such as '(?:\W)'.  That seems to work for this example.



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