56eda0e1e8
parsers from simple yacc-like grammar specifications. Submitted by: W. Gerald Hicks <wghicks@bellsouth.net> PR: ports/12569
13 lines
791 B
Text
13 lines
791 B
Text
RecDescent incrementally generates top-down recursive-descent text
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parsers from simple yacc-like grammar specifications. It provides:
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* Regular expressions or literal strings as terminals (tokens)
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* Multiple (non-contiguous) productions for any rule
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* Repeated, optional and alternate subrules within productions
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* Late-bound (run-time dispatched) subrules
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* Full access to Perl within actions specified as part of the grammar
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* Simple automated error reporting during generation and parsing
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* The ability to commit to, uncommit to, or reject particular
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productions during a parse
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* Incremental extension of the parsing grammar (even during a parse)
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* The ability to retrieve the generated parsing code.
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