Why is the Java statement ```public static final long SIGN_BIT_MASK = 0x8000000000000000L;``` a pe...

# compiler

[Michael Paus]

Why is the Java statement

public static final long  SIGN_BIT_MASK  = 0x8000000000000000L;

a perfectly legal statement and its Kotlin counterpart

const val SIGN_BIT_MASK: Long = 0x8000000000000000L

results in an error? (Value out of range.)

Such inconsistencies make it very difficult to port any Math libraries from Java to Kotlin.

[Tóth István Zoltán]

You might want to try ULong in the Kotlin code which is unsigned. I think it is a bit of inconsisteny on the Java side that long may be unsigned or signed while other types are signed by default.

[Michael Paus]

Thanks, I’ll give ULong a try.

[Michael Paus]

It worked although it is a bit complicated by the fact that Double.toRawBits and Double.fromBits only use Long but not ULong. But with the conversion .toLong it works.