Contents

module Treetop
  class Protometagrammar
    class CharacterClassExpressionBuilder < ParsingExpressionBuilder
      def build
        character_class
      end
  
      def character_class
        seq('[', one_or_more(char_class_char), ']')  do
          def value(grammar = nil)
            CharacterClass.new(characters)
          end
      
          def characters
            elements[1].text_value
          end
        end
      end
  
      def char_class_char
        seq(notp(']'), choice(escaped(']'), any))
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

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