CallableTraits is a C++11 header-only library for the inspection, synthesis, and decomposition of callable types.
The latest documentation is available here.
CallableTraits was formally reviewed and accepted into the Boost C++ Libraries. CallableTraits is available in Boost 1.66 (December 2017) and later. You can also download CallableTraits as a standalone library here.
Licensed under the Boost Software License, Version 1.0.