Delegate in C++11

Question

Does C++11 provide delegates?

If not, what is the best (most efficient) way to do something similar in C++? Boost.Signals? FastDelegate? Something else?

Answer 1

You don't necessarily need to wait for C++0x. You can implement Delegates almost as well in the current C++03 standard. You simply have to overload the operator (), so as you can call MyObjectFunctor functor; functor(); and since the functor is an object, you can pass it as a delegate/object into functions;

the current version of the STL defines the header that provides functions ready to be used with Functors/Lambdas/Delegates.

simple example of a functor.

struct FunctorDelegate
{
    // as so to delegate as a function that takes an int input
    void operator()(int) 
    {
        // do what I want
    }
};

int main()
{
    //... do some stuffs with an std::vector aRange; 
    FunctorDelegate functor;
    std::for_each(aRange.begin(), arange.end(), functor);
}