Re: [boost] [serialization] wrongly initialized char set for XML grammar

From: Joel de Guzman (joel_at_[hidden])
Date: 2007-03-08 09:41:30

Vyacheslav E. Andrejev wrote:
> Hello All,
> 
> XML grammar parser in boost::serialization has a definition of spirit primitive 
> to deal with XML character set. Initialization of this pimitive looks like 
> following (file $(BOOST)/libs/serialization/src/xml_grammar.cpp):
> 
> Char = chset_t("\x9\xA\xD\x20-\xFF");
> 
> Obviously, if char type is signed, then \xFF means -1 and the above initialization 
> will be equivalent to 
> 
> Char = chset_t("\x9\xA\xD");

No, that does not happen. The signed(ness) is ignored by the
char-set class. The full 8-bits is mapped to a 256-bit
bitset. Do you see a need for negative char values?

Regards,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net