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Kotlin support in PMD is based on the official grammar from https://github.com/Kotlin/kotlin-spec.
Language Info for Kotlin
- Since PMD 7.0
- Implementation:
KotlinLanguageModule - Id: kotlin
- PMD: ✔️
- CPD: ✔️
Java-based rules and XPath-based rules are supported.
Kotlin language versions / feature support
PMD’s Kotlin parser may lag behind the latest Kotlin compiler and does not aim to implement all new language features immediately.
The only Kotlin 2.x feature currently supported is “Multidollar interpolation: improved handling of $ in string literals”. This feature was preview in Kotlin 2.1.0 and stabilized in Kotlin 2.2.0. See Multi-dollar string interpolation.
For informational purposes, PMD advertises Kotlin 2.2.0 as the highest supported version. Selecting a different Kotlin language version does not currently change the parser behavior (unlike Java).
Other Kotlin 2.0.0 / 2.1.0 / 2.2.0 / 2.3.0 language features are not supported at this time. PRs to improve Kotlin parser coverage are welcome.