Contents

module Treetop
  class Protometagrammar
    class PrefixExpressionBuilder < ParsingExpressionBuilder    
      def build
        choice(and_predicate, not_predicate)
      end
    
      def and_predicate
        exp('&') do
          def value(parsing_expression)
            parsing_expression.and_predicate
          end
        end
      end

      def not_predicate
        exp('!') do
          def value(parsing_expression)
            parsing_expression.not_predicate
          end
        end
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
treetop-0.1.0	lib/treetop/protometagrammar/prefix_expression_builder.rb