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Erik's Blog:
PHP implementation of an LALR1 parser generator
January 19, 2010 @ 13:03:57

Erik has posted about a new parser he's created, one based on the LALR parser method, that can be downloaded here [zip].

Parser tables, along with a lexer table, are the core constituents of any compiler's front end. This LALR parser generator is heavily based on my custom Php version of the map/reduce programming technique (functional programming). I will elaborate in future posts, on why I used a map/reduce basis to implement the parser generator.

Parsers organize a set of tokens based on the rules of a formal language the parser is given. Several of the grammar text files are included in the download so you can test it out for yourself. For more on the topic check out these two posts.

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