lib/treetop/compiler/node_classes/character_class.rb

   1 module Treetop
   2   module Compiler
   3     class CharacterClass < AtomicExpression
   4       def compile(address, builder, parent_expression = nil)
   5         super
   6
   7         builder.if__ "input.index(Regexp.new(#{single_quote(text_value)}), index) == index" do
   8           assign_result "(#{node_class_name}).new(input, index...(index + 1))"
   9           extend_result_with_inline_module
  10           builder << "@index += 1"
  11         end
  12         builder.else_ do
  13           "terminal_parse_failure(#{single_quote(characters)})"
  14           assign_result 'nil'
  15         end
  16       end
  17     end
  18   end
  19 end