Function CheckCheck

tools/cpplint.py:5300–5421

Checks the use of CHECK and EXPECT macros. 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.

(filename, clean_lines, linenum, error)

def CheckCheck(filename, clean_lines, linenum, error):
    """Checks the use of CHECK and EXPECT macros.

    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.
    """

    # Decide the set of replacement macros that should be suggested
    lines = clean_lines.elided
    (check_macro, start_pos) = FindCheckMacro(lines[linenum])
    if not check_macro:
        return

    # Find end of the boolean expression by matching parentheses
    (last_line, end_line, end_pos) = CloseExpression(clean_lines, linenum, start_pos)
    if end_pos < 0:
        return

    # If the check macro is followed by something other than a
    # semicolon, assume users will log their own custom error messages
    # and don't suggest any replacements.
    if not re.match(r"\s*;", last_line[end_pos:]):
        return

    if linenum == end_line:
        expression = lines[linenum][start_pos + 1 : end_pos - 1]
    else:
        expression = lines[linenum][start_pos + 1 :]
        for i in range(linenum + 1, end_line):
            expression += lines[i]
        expression += last_line[0 : end_pos - 1]

    # Parse expression so that we can take parentheses into account.
    # This avoids false positives for inputs like "CHECK((a < 4) == b)",
    # which is not replaceable by CHECK_LE.
    lhs = ""
    rhs = ""
    operator = None
    while expression:
        matched = re.match(
            r"^\s*(<<|<<=|>>|>>=|->\*|->|&&|\|\||"
            r"==|!=|>=|>|<=|<|\()(.*)$",
            expression,
        )
        if matched:
            token = matched.group(1)
            if token == "(":
                # Parenthesized operand
                expression = matched.group(2)
                (end, _) = FindEndOfExpressionInLine(expression, 0, ["("])
                if end < 0:
                    return  # Unmatched parenthesis
                lhs += "(" + expression[0:end]
                expression = expression[end:]
            elif token in ("&&", "||"):