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Chris Smowton
2023-11-28 12:06:30 +00:00
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java/ql/lib/change-notes/2023-11-03-jdk21-support.md
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category: minorAnalysis
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* Switch cases using binding patterns and `case null[, default]` are now supported. Classes `PatternCase` and `CaseNullDefault` are introduced to represent new kinds of case statement.
* Switch cases using binding patterns and `case null[, default]` are now supported. Classes `PatternCase` and `NullDefaultCase` are introduced to represent new kinds of case statement.
* Both switch cases and instanceof expressions using record patterns are now supported. The new class `RecordPatternExpr` is introduced to represent record patterns, and `InstanceOfExpr` gains `getPattern` to replace `getLocalVariableDeclExpr`.
* The control-flow graph and therefore dominance information regarding switch blocks in statement context but with an expression rule (e.g. `switch(...) { case 1 -> System.out.println("Hello world!") }`) has been fixed. This reduces false positives and negatives from various queries relating to functions featuring such statements.