PEG切割点

Roman R. Redziejowski
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引用次数: 7

摘要

解析表达式语法(PEG)编码具有有限回溯的递归下降解析器。最近注意到,当解析器一个接一个地探索几个备选方案时,在解析器达到某个“切断点”后,不需要再探索其他备选方案。这一事实可以用来节省处理时间和存储空间。本文的主题是确定切点,这也有助于更好地进行诊断。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cut Points in PEG
Parsing Expression Grammar (PEG) encodes a recursive-descent parser with limited backtracking. It has been recently noticed that in the situa tion when the parser is to explore several alternatives one after another, no further alternatives ne ed to be explored after the parser reached certain "cut point". This fact can be used to save both processing time and storage. The subject of the paper is identification of cut points, which can also help in producing better diagnostics.
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