Return or assignment can be lifted out

Reports if, when, and try statements that can be converted to expressions by lifting the return statement or an assignment out.

Example:

  fun foo(arg: Int): String {
      when (arg) {
          0 -> return "Zero"
          1 -> return "One"
          else -> return "Multiple"
      }
  }

After the quick-fix is applied:

  fun foo(arg: Int): String {
      return when (arg) {
          0 -> "Zero"
          1 -> "One"
          else -> "Multiple"
      }
  }

If you would like this inspection to highlight more complex code with multi-statement branches, uncheck the option "Report only if each branch is a single statement".

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.

LiftReturnOrAssignment

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 | Style issues

Inspection options

Here you can find the description of settings available for the Return or assignment can be lifted out inspection, and the reference of their default values.

Report only if each branch is a single statement: Default: Selected

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Kotlin, 241.18072-IJ

Last modified: 18 June 2024