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pyPEG for Linux 1.1

Company: Volker Birk
Date Added: September 10, 2013  |  Visits: 217

pyPEG for Linux

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Python is a nice scripting language. It even gives you access to it's own parser and compiler. It also gives you access to different other parsers for special purposes like XML and string templates.<br /><br />But sometimes you may want to have your own parser. This is what's pyPEG for. And pyPEG supports Unicode.<br /><br />To get a quick view on what's happening, please read this article on how to parse an arbitrary language to XML with pyPEG on my blog.<br />What is PEG?<br /><br />PEG means Parsing Expression Grammar. It's something like the idea of Regular Expressions for context free languages; a very clear explanation you'll find in the Wikipedia article about PEG.<br /><br />With PEGs you can describe the same languages like with BNF (and they're even similar).<br />What is a Parser-Interpreter?<br /><br />Common parsers are not using PEGs and top-down parsing, but LR(n) or LL(n) and bottom-up parsing. This results in the idea of implementing parser generators.<br /><br />Because with LR(n) or LL(n) parsers you need to calculate out a DFA first, usually you let the parser generator do this for you. The result is a parser implementation for your BNF grammar, which was the input. One could call a parser generator a compiler from BNF to a parser implementation.<br /><br />A Parser-Interpreter does work as an interpreter instead of being such a compiler. Just give your grammar as input, and it parses the described language out of text. There will be no program generated.<br />Using pyPEG<br /><br />That means: using pyPEG is very easy ;-) If you know regular expressions already, you will learn to use pyPEG quickly.

Requirements: No special requirements
Platforms: *nix, Linux
Keyword: Access Article Compiler Generator Grammar Implementation Input Language Languages Means Parser Parsers Parsing Pypeg Result What039s
Users rating: 0/10

License: Freeware Size: 10.24 KB
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