Kotlin
Redundant 'Unit'
Warning
New
Last modified: 03 December 2024 Reports redundant Unit
expressions.
Unit
in Kotlin can be used as the return type of functions that do not return anything meaningful. The Unit
type has only one possible value, which is the Unit
object.
Examples:
fun redundantA(): Unit {
return Unit // redundant, 'Unit' is returned by default and matches the expected return type
}
fun requiredA(condition: Boolean): Any {
if (condition) return "hello"
return Unit // explicit 'Unit' is required since the expected type is 'Any'
}
fun redundantB(condition: Boolean): Any = if (condition) {
fun ancillary(): Int = 1
println("${ancillary()}")
Unit // redundant since the last expression is already of type 'Unit'
} else {
println("else")
}
fun requiredB(condition: Boolean): Any = if (condition) {
1024
Unit // required, otherwise '1024' (Int) would be the return value
} else {
println("else")
}
- 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.
RedundantUnitExpression
Inspection Details | |
---|---|
By default bundled with: | |
Can be installed with plugin: | Kotlin, 243.23126-IJ |
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