libsigc++3: libsigc++3 (callback system for standard C++ v3) libsigc++3: libsigc++3: libsigc++3 implements a typesafe callback system for standard C++. libsigc++3: It allows you to define signals and to connect those signals to any libsigc++3: callback function, either global or a member function, regardless libsigc++3: of whether it is static or virtual. It also contains adaptor classes libsigc++3: for connection of dissimilar callbacks. libsigc++3: libsigc++3: Homepage: https://github.com/libsigcplusplus/libsigcplusplus libsigc++3: libsigc++3: