Finite State Machine example

From: b_trask (b_trask_at_[hidden])
Date: 2003-04-27 14:44:34

Hello,

I am looking at 
http://www.boost.org/libs/mpl/doc/paper/html/example.html

I have a dumb question or perhaps I am missing something (or both).

Where is the state_machine class template that the player derives from
using the curiously recurring template pattern?

class player
    : state_machine<player>  // where is the code for this class?
{

Regards,
Bruce