Files
kotlin-fork/compiler/testData/codegen/box/classes/delegation2.kt
T
Juan Chen d163853c97 [FIR] add support for implementation by delgation
This commit handles "subclass: super-interface by delegate-expression".

During Psi2Fir, for each delegate, we add to the subclass a synthetic
field (which has type super-interface), and an assignment of the
delegate-expression to the synthetic field in the primary constructor,
so that the delegate-expression can be resolved and transformed along
the way.

During Fir2Ir, we look up delegatable members from the super-interface
and generate corresponding functions/properties for the subclass.

TODO: support for generic delegatable members and generic
super-interface.
2020-07-08 09:42:24 +03:00

25 lines
396 B
Kotlin
Vendored

interface Trait1 {
fun foo() : String
}
interface Trait2 {
fun bar() : String
}
class T1 : Trait1{
override fun foo() = "aaa"
}
class T2 : Trait2{
override fun bar() = "bbb"
}
class C(a:Trait1, b:Trait2) : Trait1 by a, Trait2 by b
fun box() : String {
val c = C(T1(),T2())
if(c.foo() != "aaa") return "fail"
if(c.bar() != "bbb") return "fail"
return "OK"
}