Understanding std::function and std::bind

Question

I was playing arround with std::function and std::bind and I noticed something unintuitive and I would like to understand it better.

For example:

void fu         


        

Answer 1

The forwarding call wrapper generated by a call to function template bind can accept any number of extra parameters; these will be ignored. The effective arity and minimal signature of a bind expression is determined by the placeholders used in its construction, and which callable argument(s) they are bound to.