Function Adaptor Reference

This completes the adaptors given in Function Adaptors.

Expression	Effect
mem_fun(op)	calls op as a constant member function for an object
mem_fun_ref(op)	calls op as a constant member function for an object that has a pointer to it
bind1st(op, val)	takes a binary function object op and a value val, and returns a unary function object with the first argument of op bound to val. Thus bind1st(op, val) becomes op(val, param).
bind2nd(op, val)	takes a binary function object op and a value val, and returns a unary function object with the second argument of op bound to val. Thus bind2nd(op, val) becomes op(param, val).