Isn't effect deprecated? `public inline fun <R, A> effect(@BuilderInference noinline block: su...

# arrow

[dave08]

Isn't effect deprecated? public inline fun <R, A> effect(@BuilderInference noinline block: suspend Raise<R>.() -> A): Effect<R, A> = block or is it only partially being deprecated?

[simon.vergauwen]

EffectScope/EagerEffectScope is getting replaced by Raise, but this also meant it had to move package from arrow.core.continuations to arrow.core.raise to avoid conflicts in names and signatures.

Effect is no longer an interface but a simple typealias for suspend Raise<E>.() -> A and that comes with a significant amount of runtime performance benefits.

Similarly EagerEffect is also no longer an interface but also a typealias for Raise<E>.() -> A.

The reason for effect { } is so that it can automatically infer R using @BuilderInference. Using regular lambda syntax is not able to do that.