This paper describes the incremental weaving implementation of Apostle, an aspect-oriented language extension to Smalltalk modelled on AspectJ. Apostle implements incremental weaving in order to make aspect-oriented programming (AOP) a natural extension of the incremental edit-run-debug cycle of Smalltalk environments. The paper analyzes build dependencies for aspect declarations, and shows that two simple dependency table structures are sufficient to produce reasonable re-weaving efficiency. The resulting incremental weaver provides re-weaving performance proportional to the change in the program.
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