Refactoring feature modules

Abstract. In feature-oriented programming, a feature is an increment in program functionality and is implemented by a feature module. Programs are generated by composing feature modules. A generated program may be used by other client programs but occasionally must be transformed to match a particular legacy interface before it can be used. We call the mismatch of the interface of a generated program and a client-desired in-terface an incompatibility. We introduce the notion of refactoring feature modules (RFMs) that extend feature modules with refactorings. We ex-plain how RFMs reduce incompatibilities and facilitate reuse, and report our experiences on five case studies.