对重构函数式程序的工具支持

Huiqing Li, S. Thompson
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引用次数: 74

摘要

重构是源到源的程序转换,它改变程序的结构和组织,但不改变程序的功能。重构被记录在目录中,并得到工具的支持,它提供了适应和改进现有代码设计的方法,从而使现代敏捷软件开发过程成为可能。重构在软件开发和维护中占据了重要的位置,但是最近的成功大多发生在OO和XP社区。在我们的项目中,我们以Haskell作为具体的案例研究,探讨了“重构函数式程序”的前景。本文讨论了我们在Haskell Refactorer上的工作中提出的各种实用问题和实现问题。我们简要介绍了重构背后的思想,以及一组基本的函数重构。然后,本文的核心部分概述了我们为非玩具语言开发实用工具的目标所带来的主要挑战,总结了我们在尝试建立必要的元编程基础设施方面的经验,并给出了我们当前原型重构工具的实现概述。使用Haskell作为我们的实现语言,我们还提供了一些关于Haskell整体编程的初步评论。
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Tool support for refactoring functional programs
Refactorings are source-to-source program transformations which change program structure and organisation, but not program functionality. Documented in catalogues and supported by tools, refactoring provides the means to adapt and improve the design of existing code, and has thus enabled the trend towards modern agile software development processes. Refactoring has taken a prominent place in software development and maintenance, but most of this recent success has taken place in the OO and XP communities.In our project, we explore the prospects for 'Refactoring Functional Programs', taking Haskell as a concrete case-study. This paper discusses the variety of pragmatic and implementation issues raised by our work on the Haskell Refactorer. We briefly introduce the ideas behind refactoring, and a set of elementary functional refactorings. The core of the paper then outlines the main challenges that arise from our aim to produce practical tools for a decidedly non-toy language, summarizes our experience in trying to establish the necessary meta-programming infrastructure and gives an implementation overview of our current prototype refactoring tool. Using Haskell as our implementation language, we also offer some preliminary comments on Haskell programming-in-the-large.
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