A compositional paradigm of automating refactorings

  • Authors:

  • Mohsen Vakilian;Nicholas Chen;Roshanak Zilouchian Moghaddam;Stas Negara;Ralph E. Johnson

  • Affiliations:

  • University of Illinois at Urbana-Champaign;University of Illinois at Urbana-Champaign;University of Illinois at Urbana-Champaign;University of Illinois at Urbana-Champaign;University of Illinois at Urbana-Champaign

  • Venue:
  • ECOOP'13 Proceedings of the 27th European conference on Object-Oriented Programming
  • Year:
  • 2013

  • Refactoring with synthesis

    Proceedings of the 2013 ACM SIGPLAN international conference on Object oriented programming systems languages & applications

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Abstract

Recent studies suggest that programmers greatly underuse refactoring tools, especially for complex refactorings. Complex refactorings tend to be tedious and error-prone to perform by hand. To promote the use of refactoring tools for complex changes, we propose a new paradigm for automating refactorings called compositional refactoring. The key idea is to perform small, predictable changes using a tool and manually compose them into complex changes. This paradigm trades off some level of automation by higher predictability and control. We show that this paradigm is natural, because our analysis of programmers' use of the Eclipse refactoring tool in the wild shows that they frequently batch and compose automated refactorings. We then show that programmers are receptive to this new paradigm through a survey of 100 respondents. Finally, we show that the compositional paradigm is effective through a controlled study of 13 professional programmers, comparing this paradigm to the existing wizard-based one.