# File lib/racc/grammar.rb, line 127
    def parser_class
      states = states()   # cache
      if $DEBUG
        srcfilename = caller(1).first.slice(/\A(.*?):/, 1)
        begin
          write_log srcfilename + ".output"
        rescue SystemCallError
        end
        report = lambda {|s| $stderr.puts "racc: #{srcfilename}: #{s}" }
        if states.should_report_srconflict?
          report["#{states.n_srconflicts} shift/reduce conflicts"]
        end
        if states.rrconflict_exist?
          report["#{states.n_rrconflicts} reduce/reduce conflicts"]
        end
        g = states.grammar
        if g.useless_nonterminal_exist?
          report["#{g.n_useless_nonterminals} useless nonterminals"]
        end
        if g.useless_rule_exist?
          report["#{g.n_useless_rules} useless rules"]
        end
      end
      states.state_transition_table.parser_class
    end