When I have a function context(EffectScope<Erro...

# arrow

[Kristian Nedrevold]

When I have a function context(EffectScope<Error>) suspend fun foo(): T. If I call foo() inside an either {} block I don't need to call .bind() and everything works as expected, correct?

[Alejandro Serrano Mena]

yes, you only need to call bind when you need to consume an Either within an EffectScope

[Kristian Nedrevold]

A lot of my functions that interact with APIs I don't own look like

fun doSomething(): Either<MyError, T> = Either.catch { ... }.mapLeft { MyError }

When using EffectScope<Error> what would be an equivalent ?

context(EffectScope<MyError>) suspend fun doSomething(): T = try { ... } catch { shift(MyError) }

Is what I have now when I want to map the exception to an error type in the function.

context(EffectScope<MyError>) suspend fun doSomething(): T = ...
effect { doSomething() }.fold(
    error = { ... } ...

How I handle the exception if I want to handle it at the caller. Is this the "intended" way of doing this?

[Kristian Nedrevold]

The last way is what seems to be the obviously idiomatic way of doing it, but it also requires that exceptions are exceptional, which they often aren't.

[Alejandro Serrano Mena]

may I suggest you to open a discussion in the repo? this seems like an interesting use for a new combinator in which we wrap an exceptional function and use it inside an EffectScope

[Kristian Nedrevold]

Yeah, I can do that.