More manipulators

Manipulators without arguments
- The manipulator is a pointer to function
- Handled by an operator overload of operator<< on basic_ostream<C,Tr>
  - See example below
Manipulators with arguments
- The manipulator m(a) returns an struct that aggregates a function pointer and the argument a
- An overload of << activates the function on the argument before it returns the stream
- Interesting details on page 1087 in The C++ Prog. Lang. (4. edition)
  - Illustrated below in an example