[Boost-users] [boost.regex]Does boost:u32regex recognize the unicode named blocks like "\p{IsBasicLatin}"?

Hi,all Nowadays I am using boost:u32regex to do some regular expression processing.But it seems that "/p{IsBasicLatin}"is not a accessable expression by boost::make_u32regex(tmp).Does boost:regex not suppor the named unicode blocks or I have to pass some other flags to the library? Now I was using the defult flag wich indicate using perl syntactic. thanks®ards Juan