If ampersands aren't needed for function pointers, why does boost::bind require one?
boost-bind, c++, function-pointers
Solution
Function pointers don't need it, member function pointers do.
`Device::asyncUpdate` is member function, as you could guess because it is being bound to `this`.
Here's a normative quote from n3337, 5.3.1/4
A pointer to member is only formed when an explicit & is used and its operand is a qualified-id not enclosed in parentheses.
Problem
I've always believed that function pointers don't require an ampersand: Do function pointers need an ampersand Yet, every example I've seen of using `boost::bind` shows one, and my compiler - in most situations - gives a typically inscrutable error message if it's omitted. ``` synchronize(boost::bind(&Device::asyncUpdate , this, "ErrorMessage")); // Works synchronize(boost::bind(Device::asyncUpdate , this, "ErrorMessage")); // Fails ``` Am I wrong in assuming that `boost::bind`'s first parameter is basically function pointer?