devel/p5-Parse-RecDescent 1.967015p0 OpenBSD

Parse::RecDescent incrementally generates top-down recursive-descent text parsers from simple yacc-like grammar specifications. It provides:

• Regular expressions or literal strings as terminals (tokens)
• Multiple (non-contiguous) productions for any rule
• Repeated and optional subrules within productions
• Full access to Perl within actions specified as part of the grammar
• Simple automated error reporting during parser generation and parsing
• The ability to commit to, uncommit to, or reject particular productions during a parse
• The ability to pass data up and down the parse tree ("down" via subrule argument lists, "up" via subrule return values)
• Incremental extension of the parsing grammar (even during a parse)
• Precompilation of parser objects
• User-definable reduce-reduce conflict resolution via "scoring" of matching productions