Making Patterns Explicit with Metaprogramming

Design patterns have been a useful tool for a better understanding
of the collaboration between several classes and objects in a
program.
One drawback of this approach is the lack of an explicit representation
of the patterns used in a program, as the collaboration between classes
is normally expressed in the code of the class itself.
In this paper, we present a method for explicitly representing patterns in
a program with the help of metaprogramming techniques. The method
presented has benefits compared to traditional approaches with respect
to documentation and reusability of the program, as well as providing a
better separation of the protocol contained in the pattern.