交互式解析器合成示例

Alan Leung, J. Sarracino, Sorin Lerner
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引用次数: 48

摘要

尽管对解析进行了数十年的研究,但解析器的构建仍然是一个艰苦的手工过程,容易出现细微的错误和陷阱。我们提出了一个名为Parsify的按例编程框架,它能够从输入/输出示例合成解析器。用户不需要编写任何代码。为了实现这一点,Parsify提供了:(a)一个迭代算法,用于一次合成和细化一个示例的语法;(b)一个界面,用于响应正在细化的语法中的变化,提供即时的视觉反馈;(c)一个图形化机制,用于仅使用文本选择来指定示例解析树。通过使用Parsify为来自Verilog、SQL、Apache和Tiger的源代码构建解析器,我们从经验上证明了我们方法的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interactive parser synthesis by example
Despite decades of research on parsing, the construction of parsers remains a painstaking, manual process prone to subtle bugs and pitfalls. We present a programming-by-example framework called Parsify that is able to synthesize a parser from input/output examples. The user does not write a single line of code. To achieve this, Parsify provides: (a) an iterative algorithm for synthesizing and refining a grammar one example at a time, (b) an interface that provides immediate visual feedback in response to changes in the grammar being refined, and (c) a graphical mechanism for specifying example parse trees using only textual selections. We empirically demonstrate the viability of our approach by using Parsify to construct parsers for source code drawn from Verilog, SQL, Apache, and Tiger.
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