Hi there, is it possible to get the name of the constants an enum declares? This isn't possible with the traditional Java annotation processing but I was curious if it's something KSP might support.

what do you mean by “name of the constants”?

Say I have an enum like this:

enum class Foo { bar, bazz }

Then I want to be able to get the values bar and bazz given that I have KSDeclaration of Foo

if you already have the enum class, you can get the enum entries by

KSClassDeclaration.declarations

Will this work on enums that are not part of the processor itself but of the code which is being processed? This enum will be user-defined and my annotation processor won't know much about it other than the fact that it is the return type (or parameter type) of the method annotated by one of the annotations it is processing.

It will only work for entities being processed (i.e. user enums)

it will work

Okay, thanks a lot. I will give it a shot 👍

No

Thanks for your reply @Big Chungus

Thanks, I'm very proud of it!

It actually can, you will need to add

-Xallow-no-source-files

flag, as otherwise compiler will simply return upon no kotlin source case. But that will requires you to run KSP in commandline mode which can be tricky to figure out how to do that without the help of gradle.

Wait what? Is this recent?

no it’s not, that was a compiler flag.

No I know the flag, I meant ksp being able to process java files

oh KSP has been able to process java files since day 1…

Oh boy... I've lied to so many people then!..

That's great to hear @Jiaxiang. Also, I'm using kotlinc from the command-line (in a way), so it would it be pretty straightforward to implement this.

I don't recall where I read it, but I was so sure it can only work with kotlin files. Or maybe I got it confused with ksp not being able to cooperate with JAP

No worries, that was my initial thought as well since if you try to use kotlinc on Java-only sources you'd get the no source files errors. I was unaware of the flag mentioned by Jiaxiang.

well, no, kotlinc only process kotlin files no matter what, you still need a separate javac call to compile java files. There might be some flags in kotlinc that will make kotlinc invoke Javac internally, but I can’t recall, and probably I won’t recommend doing so as it might be difficult dealing with javac arguments.

Ah yes. It only produces the .kotlin_module files. I thought it also generated the .class files.