investigate possibility of invoking for_each

[ichthyo]

Using tr1::bind, it is possible to invoke a member function on each element, given the elements are pointers. Because the tr1-binders always take their argument by value, it isn't possible to do the same on a collection of elements. See UtilForeach_test::check_invoke_on_each()

But, internally this invoking of member functions relies on std::mem_fun, which is capable to work on a reference for the *this-Parameter. Investigate feasibility of creating a custom functor, which does this kind of invocation.

But note: it could well be that we don't need such a feature at all...