C.5. Engines

Engines and its subtypes are shown in Figure C-17. Five subtypes of Engines are shown. Details appear in subsequent diagrams. The Engine class box shows no members because it has no members. Only subtypes have members. More explanation of these classes can be found in Chapter 6. The implementation files in Figure C-18 use the [1-7] regular expression to indicate 1, 2, …, or 7.

Implementation files are located within the src/Engine directory.