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map::of() should return reference to new object #2

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tclune opened this issue Mar 9, 2018 · 1 comment

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tclune commented Mar 9, 2018 •

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currently if the key is not found, a null pointer is returned, but the underlying set has grown.

Polymorphism gets interesting in this case.

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tclune commented Mar 9, 2018

Polymorphism should return a new instance for the base class if it is not abstract. But if it is ... then of() should not have been used.

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