Meaning of class invariant | Babel Free

Definitions

An invariant used to constrain objects of a class that is preserved by class methods and that constrains the state stored in the object.

Examples

“Every object of a given class must satisfy the class's invariant. This invariant acts as a constraint, limiting the size of the class's state-space. A subclass both inherits the class invariant(s) of its superclass(es) and adds a further restriction of its own.”

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