Direct Encumbrance Of A Class

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Direct Encumbrance Of A Class

The direct class-reference set of a class C consists
of those classes to which C refers directly, i.e.
classes D such that:

C inherits from D

C has an attribute of class D

C has an operation with an input argument of class D

C has a variable of class D

C has a method that sends a message with a return

C supplies D as an actual class parameter to a

C has a friend class D (in C++)

Let the direct class-reference set of C comprise the

Then the indirect class-reference set of C is the

indirect class-reference sets of C1, C2, ..., Cn.

The direct encumbrance of a class is the size of its

of a class is the size of its indirect class-reference
set.