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C++ Coding Standard

Rule:  INT#007

This rule is Obsolete
Synopsis:If the behavior of an object is dependent on data outside the object, this data is not to be modified by const methods
Severity Level:9
Category:Class Interface


Although, the data exists outside the object it is still part of the state of the object. For example, when a state machine is implemented using the state pattern (see [Gamma]), a const method in the encapsulating class is able to call non-const methods on the state classes. However, data contained within the state classes should not be changed in this scenario.

Literature References:
Ellemtel Rule 24