holgerbrandl
04/17/2018, 7:41 AMUnit
is the void
equivalent, why is it assignable in kotlin but not in java?Ruckus
04/17/2018, 6:05 PMUnit
isn't the void
equivalent. The problem is void
in Java is playing two roles and doesn't distinguish between them. Java can't distinguish between a function that returns, but doesn't return a useful value (Unit
in Kotlin ()
in Rust, etc.) and a function that doesn't return at all (usually called a diverging function) (Nothing
in Kotlin, !
in Rust, etc.)Unit
+ Nothing
is the equivalent of Java's overly vague void
.