A modern programming language that makes developers happier.

kotlinlang

is there something like `TODO("reason")` but meant just for unreachable `if`/`when` branches? (for example like Rust has `unreachable!` macro do designate code paths that can't be taken)

`throw IllegalStateException("description of why this is an illegal state")` is what I do usually.

I think I'll do that... that's what `error("reason")` does, right?

we usually go for the more specific throwing of illegalstate/arguments, but error("reason") is fine too

I usually use <https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-assertion-error/|AssertionError> for branches that are truly unreachable