class Treetop::Compiler::CharacterClass

def compile(address, builder, parent_expression = nil)
  super
  
  builder.if__ "input.index(Regexp.new(#{single_quote(text_value)}), index) == index" do
    assign_result "(#{node_class_name}).new(input, index...(index + 1))"
    extend_result_with_inline_module
    builder << "@index += 1"
  end
  builder.else_ do
    "terminal_parse_failure(#{single_quote(characters)})"
    assign_result 'nil'
  end
end