class Opal::EofContent

def eof
  return nil if @tokens.empty?
  eof_content = @source[last_token_position..-1]
  return nil unless eof_content
  # On Windows token position is off a bit, because Parser does not seem to compensate for \r\n
  # The first eof_content line on Windows may be for example "end\r\n"
  # Must match for it and \r\n and \n
  eof_content = eof_content.lines.drop_while { |line| /\A.*\r?\n?\z/.match?(line) && !line.start_with?('__END__') }
  if /\A__END__\r?\n?\z/.match?(eof_content[0])
    eof_content = eof_content[1..-1] || []
    eof_content.join
  elsif eof_content == ['__END__']
    ''
  end
end

def initialize(tokens, source)
  @tokens = tokens
  @source = source
end

def last_token_position
  _, last_token_info = @tokens.last
  _, last_token_range = last_token_info
  last_token_range.end_pos
end