kotlin/compiler/testData/diagnostics/tests/java8Overrides/abstractVsAbstract.kt at d4f25e104364eaef8a9e95773cfdfd39d7c33ce2 - kotlin - Gitea: Git with a cup of tea

jlengrand/kotlin

mirror of https://github.com/jlengrand/kotlin.git synced 2026-05-11 08:31:30 +00:00

Files

Dmitry Petrov 5d9ee7efee Java 8 rules for method overrides:

- base class method wins against a (default) interface method,
so an abstract base class method should always be implemented
in a derived class;

- interface methods clash regardless of abstract/default
with possibly undefined behavior at run-time,
so a class or interface should always define its own method
for methods inherited from multiple interfaces and not from base class;

- meaningful diagnostics for class inheriting conflicting JVM signatures.
Since no override will happen under Java 8 rules,
ACCIDENTAL_OVERRIDE is misleading for this case;

- update testData.

2015-10-12 14:12:31 +03:00

13 lines

216 B

Kotlin

Vendored

Raw Blame History

 interface ILeft {
     fun foo()
 }
 interface IRight {
     fun foo()
 }
 interface IDerived : ILeft, IRight
 <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>class CDerived<!> : ILeft, IRight
 abstract class ADerived : ILeft, IRight