Re: [boost] [regex][bug]Regex::regex_search does not handle /b&/Bcorreclty in Win32

From: John Maddock (john_at_[hidden])
Date: 2007-11-15 04:31:56

Hakuro wrote:
>> Hello Folks.
>> I found an issue of regex_search() with "/b" or "/B" assertion in
>> Win32 and created a patch(attached). Please review it.
>> In the ECMA262 regex spec(15.10.2.6), for "/b" and "/B" assertion
>> only charaters [0-9A-Za-z_] are allowed as a word character and other
>> should be treated as out of word.
>> In the boost:regex inpmenetation for Win32, GetStringTypeEx() with
>> C1_ALPHA | C1_DIGIT flags is used to determine char type.
>> However the API does not differentiate  [0-9A-Za-z_] and other
>> characters (e.g. European characters, Kanji) (just linguistic
>> characters and everybody else)
>> which does not meet the spec.

The current behaviour is deliberate: if you really want "C" locale behaviour 
then use basic_regex<char, cpp_regex_traits<char> > as you're regular 
expression type.  Crippling win32 locale support IMO is not the right thing 
to do.

Thanks, John Maddock.