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.
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++
