Perfectly imperfect:

Using perfect (and imperfect) forwarding to simplify C++ wrapper classes

by Raymond Chen

From the article:

There may be cases where you have a C++ class that wants to wrap another C++ class that is contained as a member. ... It’s annoying that there’s so much boilerplate to do the method forwarding, and that we have to keep looking up the parameters and return types so that each forwarder has the correct signature. Fortunately, we can use perfect forwarding to write most of them for us: ...