id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6282	filter and other views transform the sequence type	Robert Ramey	Joel Falcou	"code such as the following doesn't work.  That is, none of the views can produce a set type sequence.  Note this is diffferent from fusion so it is possible.  I also realize that this is non-trivial enhancement. Oh well.
{{{
    struct a {};
    struct b {};
    struct c {};
    struct d {};
    typedef boost::mpl::set<a, b, c> s1;
    BOOST_CONCEPT_ASSERT(( boost::mpl::AssociativeSequence<s1> ));
    typedef boost::mpl::set<c, d> s2;
    BOOST_CONCEPT_ASSERT(( boost::mpl::AssociativeSequence<s2> ));
    typedef boost::mpl::joint_view<s1, s2>::type sdiff;
    BOOST_CONCEPT_ASSERT(( boost::mpl::AssociativeSequence<sdiff> ));
}}}

I know it's correct as is - that is it works according to they it's described in the manual.  But it was hard to find my mistake.
"	Feature Requests	new	To Be Determined	mpl	Boost Release Branch	Optimization