[aspectj-dev] set-pointcut: exposing previous value

[Eric Bodden <eric@xxxxxxxxx>]

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Hi.

I have recently come across a strange behaviour (at least I fin dit
strange) of set-pointcuts. When I have a call, that changes a field
value from let's say 0 to 1, the following code will return 1, not 0
as I had expected:

	before (int a): set(* *.*) && args(a) {
		System.out.println(a);
	}

So why is that? I thought the semantics of a "before" advice were
that it matches *before* the execution. Apparently it even does,
cause when I employ reflection, the field value has not yet changed
(still 0). However wouldn't it be more consistent to expose the "old"
value to pieces of before/around advice?

Cheers,
Eric

- -- 
Eric Bodden
Chair I2 for Programming Languages and Program Analysis
RWTH Aachen University

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