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Type:
Sub-task
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Resolution: Delivered
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Priority:
P4
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Affects Version/s: 20
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Component/s: tools
In this release, when preview features are enabled with `--enable-preview`, a
`switch` expression over an enum type will throw a `MatchException` rather than
an `IncompatibleClassChangeError` should the selector expression yield an
unexpected enum constant value. This can only happen if the enum class has been
changed by adding a new enum constant _after_ compilation of the `switch`.
This change is required to unify the treatment of erroneous exhaustive switches
introduced by enhancing `switch` with pattern labels.
`switch` expression over an enum type will throw a `MatchException` rather than
an `IncompatibleClassChangeError` should the selector expression yield an
unexpected enum constant value. This can only happen if the enum class has been
changed by adding a new enum constant _after_ compilation of the `switch`.
This change is required to unify the treatment of erroneous exhaustive switches
introduced by enhancing `switch` with pattern labels.