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Negated boolean expression can be simplified

Reports negated boolean expressions that can be simplified.

The quick-fix simplifies the boolean expression.

Example:

fun test(n: Int) { !(0 == 1) }

After the quick-fix is applied:

fun test(n: Int) { 0 != 1 }

Please note that this action may change code semantics if IEEE-754 NaN values are involved:

fun main() { println(!(Double.NaN >= 0)) // true }

After the quick-fix is applied:

fun main() { println(Double.NaN < 0) // false }

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Kotlin, 241.16690-IJ

Last modified: 29 April 2024