# File lib/yard/parser/ruby/ruby_parser.rb, line 62
        def file_encoding
          return nil unless defined?(::Encoding)
          return @file_encoding if @file_encoding
          return Encoding.default_internal unless @encoding_line
          if match = @encoding_line.match(SourceParser::ENCODING_LINE)
            @file_encoding = match.captures.last
          end
        end