Helper interfaces for Kotlin delegates

delegates.kt

import kotlin.reflect.KProperty

interface ValDelegate<C, P> {
    operator fun getValue(thisRef: C, prop: KProperty<*>): P
}

interface ValDelegateProvider<C, P> {
    operator fun provideDelegate(thisRef: C, prop: KProperty<*>): ValDelegate<C, P>
}

interface VarDelegate<C, P>: ValDelegate<C, P> {
    operator fun setValue(thisRef: C, prop: KProperty<*>, value: P)
}

interface VarDelegateProvider<C, P> {
    operator fun provideDelegate(thisRef: C, prop: KProperty<*>): VarDelegate<C, P>
}