[Boost-users] [iterator || function_types] zip_iterator -> unpack and call?

Hi, Say I have a function "int add(int, int)" and want to use it in a call to std::transform with zip_iterators. Is there a way to do it without writing an intermediate function object? If not, would it be sensible to write a generic one using the function_types library? I can't imagine this would be too hard but just wanted to know if there is anything I can leverage before writing it myself. Thanks in advance, Sohail