[mapserver-users] Limits on CLASS EXPRESSIONS for regular expressions

[thomas bonfort]

If I'm not mistaken, mapserver uses regex, which has a smaller
featureset than perl's regular expressions. Using pcre instead of
regex inside mapserver might solve your problem.

--
thomas

On Wed, Sep 21, 2011 at 06:29, Stephen Woodbridge
<woodbri at swoodbridge.com> wrote:
> Does anyone know if/what restrictions we have on regular expressions within
> mapserver. I have a perl regular expression that matches 44 of 120 counties
> in Kentucky:
>
> EXPRESSION
> /(?-xism:(?i:(?=[abcfghjlmnorstw])(?:b(?:o(?:y(?:d|le)|urbon)|u(?:llitt|tler)|(?:arr|rack)en)|c(?:a(?:rter|sey)|(?:hristia|rittende)n|lark)|f(?:ayette|leming|ulton)|h(?:a(?:ncock|rt)|enderson)|l(?:e(?:tcher|wis)|(?:incol|oga|yo)n)|m(?:a(?:di)?son|e(?:rcer|tcalfe)|o(?:ntgomery|rgan)|ccracken|uhlenberg)|s(?:helby|impson|pencer)|t(?:aylor|odd)|w(?:ayne|oodford)|adair|grant|johnson|nicholas|oldham|russell)))/
>
> This has been optimized and uses some embedded modifiers. This works fine in
> Perl but does not match anything in mapserver.
>
> Any thoughts on how to modify this to work with mapserver. While this looks
> very convoluted, it is generated from a list of words and is high efficient
> when matching.
>
> Thoughts?
>
> -Steve W
>
> PS: Using 5.6.x at the moment.
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