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treetop.rubyforge.org
Syntactic Recognition Treetop grammars are written in a custom language based on parsing expression grammars. Literature on the subject of parsing expression grammars is useful in writing Treetop grammars. Grammar Structure Treetop grammars look like this: grammar GrammarName rule rule_name ... end rule rule_name ... end ... end The main keywords are: grammar : This introduces a new grammar. It is
Treetop is a language for describing languages. Combining the elegance of Ruby with cutting-edge parsing expression grammars, it helps you analyze syntax with revolutionarily ease. sudo gem install treetop Intuitive Grammar Specifications Parsing expression grammars (PEGs) are simple to write and easy to maintain. They are a simple but powerful generalization of regular expressions that are easie
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