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Contains godot api as kotlin classes and jvm cpp interaction code.

There is a newer version: 0.11.0-4.3

package godot.core

import godot.core.memory.TransferContext
import kotlin.reflect.KMutableProperty1

data class KtPropertyInfo(
    val _type: VariantType,
    val name: String,
    val className: String,
    val _hint: PropertyHint,
    val hintString: String,
    val visibleInEditor: Boolean,
) {
    val type: Int
        get() = _type.ordinal

    val hint: Int
        get() = _hint.ordinal
}

open class KtProperty(
    val ktPropertyInfo: KtPropertyInfo,
    protected val kProperty: KMutableProperty1,
    protected val variantType: VariantType,
    val isRef: Boolean
) {
    open fun callGet(instance: T) {
        TransferContext.writeReturnValue(kProperty.get(instance), variantType)
    }

    open fun callSet(instance: T) {
        val arg = extractSetterArgument()
        kProperty.set(instance, arg)
    }

    protected fun 
 extractSetterArgument(): P {
        //TODO: manage nullable argument of enum setter (only for objects)
        val arg = TransferContext.readSingleArgument(variantType)
        @Suppress("UNCHECKED_CAST")
        return arg as P
    }
}

class KtEnumProperty(
    ktPropertyInfo: KtPropertyInfo,
    kProperty: KMutableProperty1,
    val getValueConverter: (P?) -> Int,
    val setValueConverter: (Int) -> P
) : KtProperty(
    ktPropertyInfo,
    kProperty,
    VariantType.JVM_INT,
    false
) {
    override fun callGet(instance: T) {
        TransferContext.writeReturnValue(getValueConverter(kProperty.get(instance)), VariantType.JVM_INT)
    }

    override fun callSet(instance: T) {
        val arg = extractSetterArgument()
        kProperty.set(instance, setValueConverter(arg))
    }
}

class KtEnumListProperty, L : Collection>(
    ktPropertyInfo: KtPropertyInfo,
    kProperty: KMutableProperty1,
    val getValueConverter: (L?) -> VariantArray,
    val setValueConverter: (VariantArray) -> L
) : KtProperty(
    ktPropertyInfo,
    kProperty,
    VariantType.ARRAY,
    false
) {
    override fun callGet(instance: T) {
        TransferContext.writeReturnValue(getValueConverter(kProperty.get(instance)), VariantType.ARRAY)
    }

    override fun callSet(instance: T) {
        val arg = extractSetterArgument>()
        kProperty.set(instance, setValueConverter(arg))
    }
}