id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6373	transform_iterator not preserving bidirectionality of std::map iterator	JonT <jon@…>	Dave Abrahams	"Using transform_iterator on std::map iterator does not seem to preserve bidirectionality.

{{{
#!cpp
map::iterator itend = data.end();
XIt xend = boost::make_transform_iterator(itend,xfunc());
XIt xlast = xend;
--xlast;
assert(xend != xlast); // succeeds !
xlast = xend;
std::advance(xlast,-1);
assert(xend != xlast); // fails !
}}}

See also [http://stackoverflow.com/questions/8783048/bidirectional-boost-transform-iterator-as-with-stdmap StackOverflow Issue 8783048] for longer (compilable) example."	Bugs	closed	To Be Determined	iterator	Boost 1.49.0	Problem	wontfix	transform_iterator bidirectional std::map