YSignalSlot

YSignalSlot is a header only C++ library. It is an implementation of signal-slot mechanism via C++. It is similar to C++ signal, Boost::signal and SigSlot. It intensively uses C++11 features.

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Advantages:

• Almost everything is compile-time. So it is fast.
• It can be used with single slot function or unlimited slot functions.
• “emit” function’s return type is pointer of your actual slot function’s return type and it can be any type.
• It supports “void” return type.
• Slot(s) can be set to enable or disable. If slot(s) is/are disabled, signal can’t emit this/these slot(s).
• If slot which emitted is disabled or its return type is void, “emit” function returns “NULL” pointer.
• It works with member slot functions.
• Slot functions’ signatures are converted and stored as string.
• Slot functions’ argument counts and receivers are stored.
• It uses meta programming methods for “static for loop” and “static if”.
• Signals can be used nested.
• Receivers can be “this” pointer.
• It is free and LGPL licensed.
• It uses C++11 features.

Disadvantages:

• It works only member functions.
• Executable size may be large. Because codes generated at compile-time, not run-time.
• It doesn’t works with “const” member functions. ( like “int function1(int) const;” )
• Users must add “-std=c++0x” flag to compiler. This is required for using C++11.
• It generates a struct inside the class where you define signal. So it uses a little more code size.