Bug 64238

Description Macneil Shonle 2004-05-26 18:01:25 EDT

The below code is a simplification of an event listener style poincut
interface: (See below for a description of the bug itself.)

public class AnyoneListening {
	public static void main(String[] args) {
		AnyoneListening a = new AnyoneListening();
		Util u = new Util();
		a.doStuff(u);
	}
	
	public void doStuff(Util u) {
		notifyUtilUsed(u);
	}
	
	private void notifyUtilUsed(Util u) {/*intentionally left blank*/}
	public pointcut utilUsed(AnyoneListening al, Util u):
		this(al) && args(u) && execution(void AnyoneListening.doStuff
(Util));
	
	private void notifyUtilLookedAt(Util u) {/*intentionally left blank*/}
	public pointcut utilLookedAt(AnyoneListening al, Util u):
		execution(void AnyoneListening.notifyUtilLookedAt(Util))
		&& this(al) && args(u);
	
	public pointcut utilTouched(AnyoneListening al, Util u):
		utilUsed(al, u) || utilLookedAt(al, u);
}

class Util {
}

aspect Observer {
	before(AnyoneListening al, Util u): AnyoneListening.utilTouched(al, u) {
		System.out.println("Someone used it");
	}
}

//////////////////

This code compiles fine with ajc 1.1.1, but under 1.2 I get the following
error message:

Ambiguous binding of type Util using args(..) at this line.  Use one args(..) 
per matched join point, see secondary source location for location of 
extraneous args(..).

It worked in 1.1.1, and supposedly 1.2 didn't change the semantics of the
language, thus I file. :-)