Re: strange regexp behavior

[David Bateman]

G.. wrote:
> Thomas Weber-8 wrote:
>   
> > The error code returned by PCRE is PCRE_ERROR_MATCHLIMIT.
> >
> > The problem happens also with the pcretest program:
> >
> > =======================================================================
> >   $ pcretest 
> >   PCRE version 7.6 2008-01-28
> >
> >     re> '(\s*-*\d+[.]*\d*\s*)+\n'
> >     data>
> > '\t4\n0000\t-0.00\t-0.0000\t4\t-0.00\t-0.0000\t4\n0000\t-0.00\t-0.0000\t0\t-0.00\t-'
> >     Error -8
> > =======================================================================
> >
> >     
>
> Just for completeness: Philip Hazel (PCRE) suggested to replace, at least in
> this particular case, the function pcre_exec with pcre_dfa_exec, which in
> fact makes the problem disappear.
>
> G.
>
>   
Is this a real solution? The pcre_dfa_exec function is a non perl 
compatible regexp function, and so I assume it imposes additional 
restrictions that will need to be understood and see if they are 
compatible with the needs of the Octave regexp function and Matlab 
compatibility. Do you know what restrictions the dfa version implies?

Regards
David


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