I'm having trouble using a cinteropt enum in my Ko...

# kotlin-native

[v79]

I'm having trouble using a cinteropt enum in my Kotlin code. Given the following C header:

typedef enum
{
    BCM2835_GPIO_FSEL_INPT  = 0x00,
...
} bcm2835FunctionSelect;

I have added this as a strictEnum to `libbcm.def`:

strictEnums = bcm2835FunctionSelect

Then when I try to use it in Kotlin code, there are two issues. Firstly, I have to use it rather verbosely:

bcm2835_gpio_fsel(pin, bcm2835FunctionSelect.BCM2835_GPIO_FSEL_INPT.value.toUByte());

And secondly it doesn't compile, with the following error:

e: kotlin.UninitializedPropertyAccessException: Parent not initialized: org.jetbrains.kotlin.ir.declarations.impl.IrEnumEntryImpl@31d85176
        at org.jetbrains.kotlin.ir.declarations.impl.IrDeclarationBase.getParent(IrDeclarationBase.kt:39)
        at org.jetbrains.kotlin.ir.util.IrUtilsKt.getParentAsClass(IrUtils.kt:286)
        at org.jetbrains.kotlin.backend.konan.ir.interop.cenum.CEnumCompanionGenerator.generateAliasGetterBody(CEnumCompanionGenerator.kt:84)

It looks like I've found a bug, but maybe I'm doing something wrong?

[v79]

If I remove strictEnums from libbcm.def then bcm2835FunctionSelect.BCM2835_GPIO_FSEL_INPT isn't found at all.

[dazza5000]

interesting - does native have access to the legacy compiler?

[dazza5000]

I see ir in the namespace of stack and that is a newer compiler

[napperley]

By default the Kotlin Native compiler uses the old Kotlin compiler system.

[dazza5000]

But the namespace has ir in it?

[msink]

K/N compiler was IR-based from the very beginning.

[v79]

I'm afraid all of that's above my head... Wrong compiler?

[v79]

The project I have in mind, for the raspberry Pi, has a lot of enums defined in a C header file. I suppose I could start moving them all to Kotlin enum classes?

[sergey.bogolepov]

It might be a compiler bug. What version of Kotlin do you use?

If I remove strictEnums from libbcm.def then bcm2835FunctionSelect.BCM2835_GPIO_FSEL_INPT isn't found at all.

It is generated as constant const val BCM2835_GPIO_FSEL_INPT: bcm2835FunctionSelect.

[v79]

This is a new project so 1.4.10

[sergey.bogolepov]

Yeah, it's a bug indeed. As a workaround, you can use nonStrictEnums property in def file to force const val generation.

[sergey.bogolepov]

Created an issue (https://youtrack.jetbrains.com/issue/KT-43265) for the bug.