"Two previously beta language features become stable in Kotlin 2.3.0. These include support for nested type aliases and data flow exhaustiveness checks for when expressions. Kotlin 2.3.0 also improves context-sensitive resolution in two ways, according to JetBrains. First, the sealed and enclosing supertypes of the current type now are considered as part of the contextual scope of the search. Second, in cases with type operators and equalities, the compiler now reports a warning if using context-sensitive resolution makes the resolution ambiguous."
"For the Swift language, Kotlin 2.3.0-RC via Kotlin/Native compilation improves Kotlin interoperability with Swift through Swift export, adding support for native enum classes and variadic function parameters. Previously, Kotlin enums were exported as ordinary Swift classes, according to JetBrains. Now, mapping is direct, and developers can use regular native Swift enums. Kotlin's Java support has been updated. Starting with Kotlin 2.3.0-RC, the compiler can generate classes that contain Java 25 bytecode."
Kotlin 2.3.0 stabilizes nested type aliases and data flow exhaustiveness checks for when expressions. Context-sensitive resolution now considers sealed and enclosing supertypes as part of the contextual search scope, and the compiler warns when context-sensitive resolution creates ambiguity in cases with type operators and equalities. Kotlin/Native Swift export now maps Kotlin enums directly to native Swift enums and adds support for variadic function parameters. The compiler can generate classes containing Java 25 bytecode. Kotlin 2.3.0-RC is compatible with Gradle versions 7.6.3 through 9.0.0, though newer Gradle releases may produce deprecation warnings or unsupported features.
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