IndexicalInstaller

InstallIndexical InstallInto InstallMultipleIndexicals MakeValid

Attributes

Class IndexicalInstaller defines no new attributes.

Fields

instance IndexicalInstaller tag;
indexicalValues: nilObject;
end instance;

Define Class IndexicalInstaller;
    inherits from ObjectList;

    field indexicalValues : ObjectList;

    operation InstallIndexical(indexicalToChange: Object; newValue: Object);
        // Install an indexical into the system. ???
        // rarely override.
    operation InstallMultipleIndexicals(indexicalList: ObjectList);
        // Install multiple indexicals into the system.  indexicalList should
        // be a list of paired entries.  The first item in the pair is the indexical
        // to be replaced, and the second is its new value.
        // rarely override.

    overrides MakeValid;
        // Re-installs original values for indexicals which have disappeared.
        // If an indexical has been installed multiple times, restores the
        // most recent valid value.
    overrides InstallInto;
        // Call-through to InstallMultipleIndexicals.  the flags and parameter
        // arguments are ignored.
end class;