id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
8775	fusion transform and fold not respecting const-ness of the sequence	Eric Niebler	Joel de Guzman	"The following does not compile:

{{{
#include <boost/fusion/include/vector.hpp>
#include <boost/fusion/include/transform.hpp>
#include <boost/fusion/include/fold.hpp>
#include <boost/fusion/include/copy.hpp>
namespace fusion = boost::fusion;

struct F
{
    typedef int result_type;
    int operator()(int state, int & val) const
    {
        return state;
    }
};

struct G
{
    typedef int result_type;
    int operator()(int & val) const
    {
        return val;
    }
};

int main()
{
    fusion::vector<int, int> v(1,2);
    fusion::vector<int, int> v2;
    // fold does not respect constness
    fusion::fold(v, 42, F());
    // transform does not respect constness
    fusion::copy(fusion::transform(v, G()), v2);
}
}}}

In my opinion, it should.
"	Bugs	new	To Be Determined	fusion	Boost Development Trunk	Problem