Function CheckParenthesisSpacing

tools/cpplint.py:4470–4519

Checks for horizontal spacing around parentheses. 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 CheckParenthesisSpacing(filename, clean_lines, linenum, error):
    """Checks for horizontal spacing around parentheses.

    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]

    # No spaces after an if, while, switch, or for
    match = re.search(r" (if\(|for\(|while\(|switch\()", line)
    if match:
        error(
            filename, linenum, "whitespace/parens", 5, f"Missing space before ( in {match.group(1)}"
        )

    # For if/for/while/switch, the left and right parens should be
    # consistent about how many spaces are inside the parens, and
    # there should either be zero or one spaces inside the parens.
    # We don't want: "if ( foo)" or "if ( foo   )".
    # Exception: "for ( ; foo; bar)" and "for (foo; bar; )" are allowed.
    match = re.search(
        r"\b(if|for|while|switch)\s*"
        r"\(([ ]*)(.).*[^ ]+([ ]*)\)\s*{\s*$",
        line,
    )
    if match:
        if len(match.group(2)) != len(match.group(4)) and not (
            match.group(3) == ";"
            and len(match.group(2)) == 1 + len(match.group(4))
            or not match.group(2)
            and re.search(r"\bfor\s*\(.*; \)", line)
        ):
            error(
                filename,
                linenum,
                "whitespace/parens",
                5,
                f"Mismatching spaces inside () in {match.group(1)}",
            )
        if len(match.group(2)) not in [0, 1]:
            error(
                filename,
                linenum,
                "whitespace/parens",
                5,
                f"Should have zero or one spaces inside ( and ) in {match.group(1)}",
            )


def CheckCommaSpacing(filename, clean_lines, linenum, error):