A clean way to store a function and its (arbitrary-type, arbitrary-number) arguments

Question

For a library, I\'d like a function to accept another function and its arguments, then store them all for calling later. The arguments must allow for any mixture of types, b

Answer 1

If your only concern is to hide the argument binding from the callsite while keeping your interface, use variadic templates

class DelayedCaller
{
public:
  template
  static DelayedCaller* setup(void (functionPtr*)(Args...), Args&&... args)
  {
    return new DelayedCaller(std::bind(functionPtr, std::forward(args)...));
  }

  DelayedCaller(const std::function& f) : f(f) {}

private:
  std::function f;
};

The public constructor still offers your users the possibility to initialize it with a lambda is they wish.