[boost] [Filesystem] asymmetry between path(Iter, Iter) and begin/end ??

Hi! I'm wondering about the rationale regarding the following: path p1 = ...; path p2(p1.begin(), p1.end()); //ERROR?? How could it be the begin/end pair cannot be used to construct a new path because the value_types are way different? I want to construct a path from, for instance, a vector<string>. I can't do so easily. Regards, Frank