id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6346	boost::regex::begin() and boost::regex::end() always return 0	nowahn <nowahn@…>	John Maddock	"Hi,

'''boost::basic_regex<...>::begin()''' and '''boost::basic_regex<...>::end()''' always return '''0''' (zero).
This is because of the status test in the relevant functions in '''boost::re_detail::basic_regex_implementation<...>''' (in the file boost/regex/v4/basic_regex.hpp:
The test is 
{{{
!this->m_status ? ...
}}}
it should be 
{{{
this->m_status ? ...
}}}
(without the '!').
The status is good if equal to zero, '''!...''' is good if NOT equal to zero.
Note that the '''str()''' function a few lines above have a less confusing test:
{{{
if(this->m_status == 0)
}}}

The fix is trivial: remove the '!' (or use the same test as in str()), but I tested it very quickly.

I join a small source code showing the bug, the output of this program (with bug not fixed and fixed), and a patch."	Bugs	closed	To Be Determined	regex	Boost 1.48.0	Problem	fixed