id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2484	Const-overload needed for bimap associative_container_adaptor::count()	mlcreech@…	Matias Capeletto	"Would it be possible to include a const-overloaded version of count() for associative containers in boost::bimaps?  I had some code like this:

{{{
void CMyClass::func(size_t key) const {
       size_t num_elements=_member_map.count(key);
       ...
}
}}}

where _member_map was a std::map, and it worked fine.  When I changed _member_map to a bimap, the equivalent code:

{{{
void CMyClass::func(size_t key) const {
       size_t num_elements=_member_map.left.count(key);
       ...
}
}}}

gives an error, because count() is non-const (whereas GCC's std::map::count() is const).  That's presumably done because the STL documentation declares count() as non-const (not sure why), but it doesn't seem there would be any harm in adding a const-overload so that this kind of code would compile when the underlying type supports it.  The attached patch fixes the problem for me.

Thanks"	Patches	closed	Boost 1.38.0	bimap	Boost 1.39.0	Problem	fixed