use  {Class ('*' | ('/' Global ...)} [, ...]

The class Use declaration is a restricted form of the procedure Use declaration. It only provides read-only access to Micro constants referenced in another class. Global variable, Structure, and Field declarations can use Micro constants in ther declarations. Declaration can take one of the following forms:

Class*                Reference all Global Micros in a Class.

Class                 Explicitly reference a Global Micro whose name is the same as the Class.

Class/ Global ...     Explicitly reference One or more Global Micros in a Class

Subsequent Use and Alter declarations are processed by reading the preambles in the Classes in the order listed. There are three kinds of name conflicts that may occur when accessing Global Micros.

• If any two Global Micros with the same name are explicitly listed on a Use declaration, a compilation error will be issued.


• If a Global Micro is accessed using the Class* format, the Micro with the same name that is explicitly listed will dominate. This will not cause a compilation error.


• If two Global Micros brought in with the Class* notation with the same name then the one defined first will dominate. In this case the order that modules are listed on the Use declarations is significant. To avoid this kind of conflict explicitly list the preferred variable.

An imported declaration may contain references to Micros that are declared in the imported module or recursively in modules that the imported module imports. Any Micros that appear in imported declarations are defined in the context of the imported Class. Micros declared in the importing Class are discarded.