Deprecated 'Enum.declaringClass' property

Reports 'declaringClass' property calls on Enum that will lead to compilation error since 1.9.

'Enum.getDeclaringClass' is among "hidden" Java functions which aren't normally visible by resolve. However, it's visible via synthetic property that is a front-end bug.

More details: KT-49653 Deprecate and remove Enum.declaringClass synthetic property

The quick-fix replaces a call with 'declaringJavaClass'.

Example:

  fun <E: Enum<E>> foo(values: Array<E>) {
    EnumSet.noneOf(values.first().declaringClass)
  }

After the quick-fix is applied:

  fun <E: Enum<E>> foo(values: Array<E>) {
    EnumSet.noneOf(values.first().declaringJavaClass)
  }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

DeclaringClassMigration

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Kotlin | Migration

This inspection only reports if the Kotlin language level of the project or module is 1.7 or higher.

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,
Can be installed with plugin:	Kotlin, 243.26483-IJ

01 April 2025