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Constant

Constant.method
marks a method in a class that may not change the related object or class.
  • The builtin behavior of Constant is not affected.
EXAMPLESCLOSE ALL
Basic Examples   (1)
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We define a class with a normal method modify and a constant one as well as a field. Static members avoid the necessity of object generation.
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Without the Constant qualifier, a method may change the field.
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The constant method fails. Look for Mutable, if fields must be changed inside a constant method.
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Object bound members work analogously. We start with the class definition.
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Again, the unqualified method may change, while the Constant one cannot.
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