:wave: anyone has type inference issues when using...

# arrow

[laimiux]

👋 anyone has type inference issues when using Either.left && Either.right within a RxJava. For example request.map { Either.right(it) }.onErrorReturn { Either.left(it) }` doesn’t compile

[pakoito]

the compiler cannot decide what the type of the other side is without a hint. Normally you do this in a local variable, or on the function return. In your case with a raw lambda it cannot decide

[pakoito]

so you have to hint it explicitly

[pakoito]

Either.left<String>(1)

[laimiux]

That doesn’t compile

[laimiux]

Type provided needs to be the type passed in the argument

[laimiux]

data class Left<out A> @PublishedApi internal constructor(val a: A) : Either<A, Nothing>()