Can arrow be used without kapt? Just the monad imp...

# arrow

[Phani Mahesh]

Can arrow be used without kapt? Just the monad implementations for option either etc?

[Gopal S Akshintala]

Yes

[Phani Mahesh]

Thanks. Do I need anything besides depending on arrow-core?

[Gopal S Akshintala]

nothing, if u r not doing anything effectful

[raulraja]

99% of the usage of arrow probably needs ArrowFx

[raulraja]

Arrow core is just a fundation library for abstractions but idiomatic apps in Kotlin that do any work with suspend need Fx

[Phani Mahesh]

I'm only working with pure code - separated all IO into different modules entirely. I'll eventually use fx but for now all I need are simply folds over a few monads and no effects.

I would really like lenses as well but kapt doesn't play well with maven or idea yet so can't use it.

[raulraja]

You can still write the lens DSL boilerplate manually

[raulraja]

Shouldn't be hard

[raulraja]

In which case what you need is just to depend on Optics

[raulraja]

Let us know if we can help you with an example if you have a model

[Phani Mahesh]

Can you point me to an example handwritten lens dsl boilerplate? I'll explore that if it is not too cumbersome.

[raulraja]

I can automatically generated it for you for any ADT you have in mind or dig an example in a sec. An alternative is that you run Gradle as a step in maven to run kapt before maven builds

[raulraja]

I was under the impression that kapt ran in maven just fine

[raulraja]

But never tried it

[raulraja]

The positive thing about you hand typing the DSL is that is gonna make you understand how all optics work

[raulraja]

So it will be a fun exercise

[pakoito]

one thing you can do is enable kapt, generate the instances, then copypaste them from the build folder into the src folder and commit them 😉

[pakoito]

then remove kapt afterwards

[Phani Mahesh]

that is a neat trick, can even do it standalone in a new project to just generate the instances.

[pakoito]

now you do a script to automate it and you've become the build infra guy