Alexander Udalov
a7b88e9485
And String.length as well. This is done for JVM interoperability: java.lang.CharSequence is an open class and has a function 'length()' which should be implemented in subclasses somehow. A minor unexpected effect of this is that String.length() is now a compile-time constant (it wasn't such as a property because properties are not supported in compile-time constant evaluation) #KT-3571 Fixed
47 lines
1.1 KiB
Kotlin
47 lines
1.1 KiB
Kotlin
import java.util.IdentityHashMap
|
|
|
|
class A {
|
|
var foo: Int by IntHandler
|
|
|
|
class object {
|
|
var bar: Any? by AnyHandler
|
|
}
|
|
}
|
|
|
|
val baz: String by StringHandler
|
|
|
|
|
|
|
|
val metadatas = IdentityHashMap<PropertyMetadata, Unit>()
|
|
|
|
fun record(p: PropertyMetadata) = metadatas.put(p, Unit)
|
|
|
|
object IntHandler {
|
|
fun get(t: Any?, p: PropertyMetadata): Int { record(p); return 42 }
|
|
fun set(t: Any?, p: PropertyMetadata, value: Int) { record(p) }
|
|
}
|
|
|
|
object AnyHandler {
|
|
fun get(t: Any?, p: PropertyMetadata): Any? { record(p); return 3.14 }
|
|
fun set(t: Any?, p: PropertyMetadata, value: Any?) { record(p) }
|
|
}
|
|
|
|
object StringHandler {
|
|
fun get(t: Any?, p: PropertyMetadata): String { record(p); return p.name }
|
|
fun set(t: Any?, p: PropertyMetadata, value: String) { record(p) }
|
|
}
|
|
|
|
fun box(): String {
|
|
val a = A()
|
|
a.foo = 42
|
|
a.foo = a.foo + baz.length()
|
|
a.foo = 239
|
|
A.bar = baz + a.foo
|
|
baz + A.bar
|
|
|
|
if (metadatas.keySet().size() != 3)
|
|
return "Fail: only three instances of PropertyMetadata should have been created\n${metadatas.keySet()}"
|
|
|
|
return "OK"
|
|
}
|