片云天共远永夜月同孤 On Sat, Jun 27, 2009 at 2:17 AM, Chris Dean <ctdean@sokitomi.com> wrote:
Xiangjun Wu <netawater@gmail.com> writes:
(cl-ppcre:scan (cl-ppcre:create-scanner "(_\\w+)*\\@\\w+") "______________________________________" :start 0)
Perhaps
(cl-ppcre:create-scanner "(_[_\\w]+)?@\\w+")
will work for your app? The problem in the original expression is the "+" followed by the "*" can lead to a combinatorial explosion.
If you loosen the requirement that all non-zero matches in the first expression must begin with an "_" you could have:
(cl-ppcre:create-scanner "[_\\w]*@\\w+")
Cheers, Chris Dean
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Thank you, it works for our application.