Thanks John, I have used "[\x0-\x7f]" instead of "/p{IsBasicLatin}" to construct the regular expression (expression=boost::make_u32regex("[\\x0-\\x7f]" )). The regular expression has been constructed correctly but it cannot accecpt instance string either "a" or " " (boost:u32match("a",expression)==false).I am wondering whether it has something to do with unicode? I have tried expression=boost::regex("[\\x0-\\x7f]" )); then I can pass the string "a" but not string " "(boost:match("a",expression)==true), which I think is reaonable for boost:regex since it does not support the unicode. So my point is: why the boost:u32match doesn't work well? Thanks®ards Juan 在2008-08-08 16:48:38，"John Maddock" 写道：

John Maddock wrote:

...

...

gj_uestc wrote:

...

...

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.

The named properties/character classes supported are here: http://www.boost.org/doc/libs/1_35_0/libs/regex/doc/html/boost_regex/syntax/...

As you can see I haven't added support for language-specific blocks yet :-(

I forgot to mention that \p{IsBasicLatin} is the same as: [\x0-\x7f], likewise the other continuous blocks can be expressed in the same way.

HTH, John.

Ok, it works for me now. Thanks a lot! 在2008-08-11 11:53:40，"Andrea Denzler" 写道： Juan, I have no problems with this sample code #include "stdafx.h" void test(wstring str) { u32regex expression = make_u32regex("^([\\x0-\\x7f]+)$"); wsmatch what; if(u32regex_match(str, what, expression)) { // what[0] contains the whole string // what[1] contains ascii text wcout << what[1] << _T(" is ascii") << endl; } else { wcout << str << _T(" is not ascii") << endl; } } int _tmain(int argc, _TCHAR* argv[]) { test(_T("Hello World!")); test(_T("ôöò")); return 0; } Hello World! is ascii ¶÷‗ is not ascii Da:boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] Per conto di gj_uestc Inviato: lunedì 11 agosto 2008 5.35 A:boost-users@lists.boost.org; john@johnmaddock.co.uk Oggetto: Re: [Boost-users] [boost.regex]Does boost:u32regexrecognize theunicode named blocks like "\p{IsBasicLatin}"? Thanks John, I have used "[\x0-\x7f]" instead of "/p{IsBasicLatin}" to construct the regular expression (expression=boost::make_u32regex("[\\x0-\\x7f]" )). The regular expression has been constructed correctly but it cannot accecpt instance string either "a" or " " (boost:u32match("a",expression)==false).I am wondering whether it has something to do with unicode? I have tried expression=boost::regex("[\\x0-\\x7f]" )); then I can pass the string "a" but not string " "(boost:match("a",expression)==true), which I think is reaonable for boost:regex since it does not support the unicode. So my point is: why the boost:u32match doesn't work well? Thanks®ards Juan 在2008-08-08 16:48:38，"John Maddock" 写道：

...

...

gj_uestc wrote:

...

...

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.   The named properties/character classes supported are here: http://www.boost.org/doc/libs/1_35_0/libs/regex/doc/html/boost_regex/syntax/...   As you can see I haven't added support for language-specific blocks yet :-(   I forgot to mention that \p{IsBasicLatin} is the same as: [\x0-\x7f],

John Maddock wrote: likewise the other continuous blocks can be expressed in the same way.   HTH, John.  

e100办理业务，抽取心动大奖，惊喜连连，赶快行动！