Kotlin.math package not importing

user_3003030 0
Viewed 2249

I'm trying to use kotlin.math.abs in a util.kt file, but the following code results in an "unused import" warning on the import statement and an unresolved reference where I use abs in the code.

import kotlin.math.abs

fun fuzzyEquals(a: Double, b:Double, epsilon: Double= 0.001) = abs(a-b) < epsilon

I'm using IntelliJ and gradle to organize the project. I'm on Intellij 2018.2.5 with Kotlin 1.3.0.

The folling code does work, so I don't think it's a problem with Kotlin as a whole

import kotlin.sequences.find

fun test() = listOf(1,2).find{it==1}
kotlin import
1 Answers

The functions from kotlin.math package can be unresolved by one of the following reasons:

  • you don't have the kotlin standard library in dependencies (it doesn't seem so from your question), or the version of that dependency is lower than that, where this package was introduced, namely 1.2. Check the dependencies block of your build file.
  • apiVersion compiler option, which limits visible API to only available in the specified version, can be set. Check whether you have this option in Gradle build file and also check the effective version in the Kotlin facet of your module in IntelliJ project structure.
user_8691840
Related