标题： 一种正则表达式的设计配方及基于配方的错误 显示英文标题

标题： A Design Recipe and Recipe-Based Errors for Regular Expressions

摘要： 本文提出了一种新框架，为形式语言与自动机理论的学生提供正则表达式设计支持。该框架包括一个正则表达式的设计步骤和一个定制的错误信息系统。错误信息系统生成基于设计步骤的错误，包括未成功完成的设计步骤。此外，错误信息遵循简洁、明了、无专业术语且不具指导性的既定实践。此外，还描述了一种用于编写单元测试的简写语法。本文展示了课堂上设计步骤的应用，讨论了使用所述系统的两个调试会话，并简要概述了错误信息系统的实现。 显示英文摘要

摘要： This article presents a novel framework to provide Formal Languages and Automata Theory students design support for the development of regular expressions. This framework includes a design recipe for regular expressions and a customized error messaging system. The error messaging system produces recipe-based errors that include the step of the design recipe not successfully completed. Furthermore, the error messages follow the established practices of being concise, succinct, jargon-free, and nonprescriptive. In addition, a shorthand syntax developed for writing unit tests is described. The in-class use of the design recipe is illustrated, two debugging sessions using the described system are discussed, and the implementation of the error messaging system is briefly sketched.