[GROOVY-3323] compiler report error when using @Delegate to implement an interface

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6-rc-2
• Fix Version/s: 1.6.4, 1.7-beta-1
• Component/s: Compiler
• Assignee: Paul King
• Reporter: Mingfai Ma
• Created: 31/Jan/09 23:07
• Updated: 07/Apr/15 19:12
• Resolved: 30/May/09 02:34

Description

take the following example:

// parent interface
interface Foo{
 def foo();
}

// parent implementation - it's irrelevant
class FooImpl implements Foo{
 def foo(){ println 'this is a foo impl' }
}

// child interface
interface Bar extends Foo{
 def bar();
}

// child implementation
class BarImpl implements Bar{
 @Delegate Foo foo;
 
 BarImpl(Foo f){ this.foo = f}
 
 def bar(){ println 'this is a bar impl'}
 
 //BarImpl doesn't implement foo() and it throws an exception
}

new BarImpl(new FooImpl()).bar()

reported the following error

Can't have an abstract method in a non-abstract class. The class 'BarImpl' must be declared abstract or the method 'java.lang.Object foo()' must be implemented.

refer to the following discussion
http://www.nabble.com/using-%40Delegate-to-implement-an-interface-td21308619.html#a21308619