Not-null assertion can be replaced with 'return'

Reports not-null assertion (!!) calls that can be replaced with the elvis operator and return (?: return).

A not-null assertion can lead to NPE (NullPointerException) that is not expected. Avoiding the use of !! is good practice.

The quick-fix replaces the not-null assertion with return or return null.

Example:

fun test(number: Int?) {
    val x = number!!
}

After the quick-fix is applied:

fun test(number: Int?) {
    val x = number ?: return
}

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Kotlin, @snapshot@

Last modified: 13 July 2023