# File lib/json/pure/parser.rb, line 73
      def initialize(source, opts = {})
        opts ||= {}
        unless @quirks_mode = opts[:quirks_mode]
          source = convert_encoding source
        end
        super source
        if !opts.key?(:max_nesting) # defaults to 19
          @max_nesting = 19
        elsif opts[:max_nesting]
          @max_nesting = opts[:max_nesting]
        else
          @max_nesting = 0
        end
        @allow_nan = !!opts[:allow_nan]
        @symbolize_names = !!opts[:symbolize_names]
        if opts.key?(:create_additions)
          @create_additions = !!opts[:create_additions]
        else
          @create_additions = false
        end
        @create_id = @create_additions ? JSON.create_id : nil
        @object_class = opts[:object_class] || Hash
        @array_class  = opts[:array_class] || Array
        @match_string = opts[:match_string]
      end