def CheckForMultilineCommentsAndStrings(filename, clean_lines, linenum, error):
    """Logs an error if we see /* ... */ or "..." that extend past one line.

  /* ... */ comments are legit inside macros, for one line.
  Otherwise, we prefer // comments, so it's ok to warn about the
  other.  Likewise, it's ok for strings to extend across multiple
  lines, as long as a line continuation character (backslash)
  terminates each line. Although not currently prohibited by the C++
  style guide, it's ugly and unnecessary. We don't do well with either
  in this lint program, so we warn about both.

  Args:
    filename: The name of the current file.
    clean_lines: A CleansedLines instance containing the file.
    linenum: The number of the line to check.
    error: The function to call with any errors found.
  """
    line = clean_lines.elided[linenum]
    line = line.replace('\\\\', '')
    if line.count('/*') > line.count('*/'):
        error(filename, linenum, 'readability/multiline_comment', 5,
            'Complex multi-line /*...*/-style comment found. Lint may give bogus warnings.  Consider replacing these with //-style comments, with #if 0...#endif, or with more clearly structured multi-line comments.'
            )
    if (line.count('"') - line.count('\\"')) % 2:
        error(filename, linenum, 'readability/multiline_string', 5,
            'Multi-line string ("...") found.  This lint script doesn\'t do well with such strings, and may give bogus warnings.  Use C++11 raw strings or concatenation instead.'
            )
