``` fun main(args: Array<String>) { val ...

# announcements

[irus]

fun main(args: Array<String>) {
    val s = ""
    val i = 0
    val b = false
    
    println(s::class == String::class)
    println(i::class == Int::class)
    println(b::class == Boolean::class)

    fun test(a: Any) = when (a::class) {
        String::class -> println("String")
        Int::class -> println("Int")
        Boolean::class -> println("Boolean")
        else -> println("Else")
    }

    test(s)
    test(i)
    test(b)
}

What you expecting here? answer in thread

[irus]

absolutely not expected for me:

true
true
true
String
Else
Else

[irus]

And fix:

fun test(a: Any) = when (a::class) {
    String::class -> println("String")
    Int::class, Int::class.javaPrimitiveType -> println("Int")
    Boolean::class, Boolean::class.javaPrimitiveType -> println("Boolean")
    else -> println("Else")
}

OMG! Platform depended code

[karelpeeters]

That's strange indeed.

[Dmitry Kandalov]

Haha, great puzzler 👍

[ilya.gorbunov]

This seems to be some optimization gone wrong. Please report an issue.

[ilya.gorbunov]

Oh, it may be already reported as https://youtrack.jetbrains.com/issue/KT-17879