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What is a subtype discriminator? Give an example of its use.
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written 2.9 years ago by
DevarenjiniP
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Subtype Discriminator
Consider the problem of inserting a new instance of a supertype.
- Into which of the subtypes (if any) should this instance be inserted?
- We need a simple mechanism to implement these rules.
- This mechanism is called Subtype Discriminator.
A subtype discriminator : is an attribute of a supertype …
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