well, since you're adding sorted containers now I guess I'll just wait till you have your own implementation of std::included(), so I deleted my sourcecode. it just took 2 sorted arrays and tried to figure out if one contains the other.
however, this problem inspired me to to start a new project: wrappers for all the different stl-algorithms. maybe I'll find a solution myself. shouldn't be too difficult to write some iterator-traits for the existing upp-containers.