libsigc

libsigc++ implements a typesafe callback system for standard C++. It allows you to define signals and to Connect those signals to any callback function, either global or a member function, regardless of whether it is Static or virtual. It also contains adaptor classes for connection of dissimilar callbacks and has an ease of use unmatched by other C++ callback libraries. Libsigc++ is licensed under the GNU Library General Public License, LGPL. Features * Compile time typesafe callbacks (FASTER than run time checks) * Typesafety violations report line number correctly with template names (no tracing template failures into headers) * No compiler extensions or meta compilers required * Proper handling of dynamic objects and signals (deleted objects will not cause seg faults) * Extendable API at any level: signal, slot, connection and trackable * Extensions do not require alteration of basic components * User definable accumulators * A variety of adaptors to change the callback signature: bind, hide, retype, compose and lambda call groups * Various compilers and platforms are supported: gcc, Cygwin, mingw32, MS .NET 2003, Sun Forte C++, Compaq C++, Intel C++, IBM AIX, Tru64, IRIX MipsPro.