I want to create my own `bind()` extension function to bind Akkurate's <ValidationResult> to Arrow's...

# arrow

[Johann Pardanaud]

I want to create my own bind() extension function to bind Akkurate's ValidationResult to Arrow's Raise blocks:

either {
    someResult.bind()
}

However, this requires to use context receivers, which are currently JVM-only.

What would you recommend to support multiplatform?

Having two extension functions? One with context receivers for JVM, and another one with a parameter for other targets?

@context(Raise<NonEmptySet<ConstraintViolation>>)
fun <T> ValidationResult<T>.bind()

fun <T> Raise<NonEmptySet<ConstraintViolation>>.bind(validationResult: ValidationResult<T>)

[Alejandro Serrano.Mena]

I would argue against that, because context receivers are still in flux... may for the time being you can do the one without contexts, I think it would be very useful even if the syntax is not 100% what one would expect

[Johann Pardanaud]

I thought Arrow was using them, but maybe they're only shown in the documentation but not used inside the codebase?

[Alejandro Serrano.Mena]

they are not used because it would make the library not apt for consumption... this is why we resort to "tricks" such as the RaiseAccumulate extending Raise

[Alejandro Serrano.Mena]

since they are very useful even in their current form, we talk about them in the Design section of the docs

[Johann Pardanaud]

great! Thank you for the feedback 🙂