How Does Function Fit with the Standard Library?

The library provides functionality that does not currently exist in the Standard Library. Generalized callbacks are a natural part of virtually all frameworks decoupling the presentation layer from the business logic, and the uses are plentiful. As there is no support in the C++ Standard Library for storing function pointers and function objects for later invocation, this is an important addition to the tools offered by the Standard Library. Also, the library is compatible with the binders from the Standard Library (bind1st and bind2nd), as well as other binder libraries that extend the aforementioned binders, such as Boost.Bind and Boost.Lambda.