C++11 observer pattern (signals, slots, events, change broadcaster/listener, or whatever you want to call it)

Question

With the changes made in C++11 (such as the inclusion of std::bind), is there a recommended way to implement a simple single-threaded observer pattern without depen

Answer 1

Since you're asking for code, my blog entry Performance of a C++11 Signal System contains a single-file implementation of a fully functional signal system based on C++11 features without further dependencies (albeit single-threaded, which was a performance requirement).

Here is a brief usage example:

Signal sig2;
sig2() += [] (std::string msg, int d)   { /* handler logic */ };
sig2.emit ("string arg", 17);

More examples can be found in this unit test.