Seattle.rb - parse_tree and ruby_parserParseTree is a C extension (using RubyInline) that extracts the parse tree for an entire class or a specific method and returns it as a s-expression (aka sexp) using ruby‘s arrays, strings, symbols, and integers. ruby_parser (RP) is a ruby parser written in pure ruby (utilizing racc—which does by default use a C extension). RP's output is the same as ParseTree's output: s-expressions using ruby's
