Some Questions about EffectTask with lib tag 0.44.1?

[ACFancy]

• Some usable functions like EffectPublisher.timer(){} was marked as deprecated?
• How to migrate Effect.merge Effect.concatenate to EffectTask.task(){} EffectTask.run(){} EffectTask.fireAndForget(){}static functions? Whether is Needed to migrate?
• Is it necessary using Swift Concurrency, EffectTask.task(){} EffectTask.run(){} EffectTask.fireAndForget(){} must be called in the end to return EffectTask<Action, Never> or EffectTask<Action, Failure> ?

[tgrapperon]

Hey @ACFancy!
If you look at #1477, you will see that Combine APIs will be slowly phased out from TCA to the profit of Swift concurrency. As a result, you're invited to use async/await variants when possible, and Combine-flavored APIs have been "softly" deprecated. They don't produce any warnings, but they're not proposed by Xcode code completion anymore.

You're not forced to migrate Effect.merge and Effect.concatenate, as these operations are already supported by concurrent API's. The corresponding EffectTasks will be executed concurrently when merging, or sequentially when concatenating.

EffectTask has only one "free" generic: Action. The failure is "hardcoded" to always be Never. This is a temporary name. In the future, and as described in #1477, it will be renamed Effect, and will only have generic and no failure at all. If you migrated your codebase to EffectTask, you will only have to rename them as Effect. EffectPublisher (which has two generics) will stay EffectPublisher, but will not be the basis of Effect anymore.

The fundamental EffectTask is EffectTask.run, which is an EffectTask that can send an arbitrary number of actions back into the system using the send argument. EffectTask.task is a specialization that sends (returns) exactly one action, and EffectTask.fireAndForget, a specialization that sends (returns) no action. When writing a reducer using Swift concurrency, you can return any of these EffectTask or .none.

Please let me know if these explanations are not clear or not answering to your questions.