Update to #179:
- Suggest "const_cast" when encountering "(char*)".
- Warn on template arguments to make_pair().
- Require <utility> if pair<> is seen now that <map> doesn't include it.
- Warn on lack of "explicit" keyword on single argument inline constructors.
- Better check for hanging ')' when closing function calls.
- Don't warn on: 'int v[1][3] = {{1, 2, 3}};'
- Allow function calls as the first argument to printf().
Review URL: http://codereview.appspot.com/4974066diff --git a/cpplint/cpplint.py b/cpplint/cpplint.py
index ef5e80f..19308c1 100755
--- a/cpplint/cpplint.py
+++ b/cpplint/cpplint.py
@@ -150,6 +150,7 @@
'build/class',
'build/deprecated',
'build/endif_comment',
+ 'build/explicit_make_pair',
'build/forward_decl',
'build/header_guard',
'build/include',
@@ -210,11 +211,11 @@
# flag. By default all errors are on, so only add here categories that should be
# off by default (i.e., categories that must be enabled by the --filter= flags).
# All entries here should start with a '-' or '+', as in the --filter= flag.
-_DEFAULT_FILTERS = [ '-build/include_alpha' ]
+_DEFAULT_FILTERS = ['-build/include_alpha']
# We used to check for high-bit characters, but after much discussion we
# decided those were OK, as long as they were in UTF-8 and didn't represent
-# hard-coded international strings, which belong in a seperate i18n file.
+# hard-coded international strings, which belong in a separate i18n file.
# Headers that we consider STL headers.
_STL_HEADERS = frozenset([
@@ -310,9 +311,9 @@
error: function, an error handler.
"""
# FIXME(adonovan): "NOLINT(" is misparsed as NOLINT(*).
- m = _RE_SUPPRESSION.search(raw_line)
- if m:
- category = m.group(1)
+ matched = _RE_SUPPRESSION.search(raw_line)
+ if matched:
+ category = matched.group(1)
if category in (None, '(*)'): # => "suppress all"
_error_suppressions.setdefault(None, set()).add(linenum)
else:
@@ -322,7 +323,7 @@
_error_suppressions.setdefault(category, set()).add(linenum)
else:
error(filename, linenum, 'readability/nolint', 5,
- 'Unknown NOLINT error category: %s' % category)
+ 'Unknown NOLINT error category: %s' % category)
def ResetNolintSuppressions():
@@ -404,7 +405,7 @@
self._last_header = ''
def CanonicalizeAlphabeticalOrder(self, header_path):
- """Returns a path canonicalized for alphabetical comparisson.
+ """Returns a path canonicalized for alphabetical comparison.
- replaces "-" with "_" so they both cmp the same.
- removes '-inl' since we don't require them to be after the main header.
@@ -662,7 +663,7 @@
self.current_function, self.lines_in_function, trigger))
def End(self):
- """Stop analizing function body."""
+ """Stop analyzing function body."""
self.in_a_function = False
@@ -760,8 +761,7 @@
def _ShouldPrintError(category, confidence, linenum):
- """Returns true iff confidence >= verbose, category passes
- filter and is not NOLINT-suppressed."""
+ """If confidence >= verbose, category passes filter and is not suppressed."""
# There are three ways we might decide not to print an error message:
# a "NOLINT(category)" comment appears in the source,
@@ -966,7 +966,7 @@
def CloseExpression(clean_lines, linenum, pos):
"""If input points to ( or { or [, finds the position that closes it.
- If lines[linenum][pos] points to a '(' or '{' or '[', finds the the
+ If lines[linenum][pos] points to a '(' or '{' or '[', finds the
linenum/pos that correspond to the closing of the expression.
Args:
@@ -1248,7 +1248,7 @@
class _ClassInfo(object):
"""Stores information about a class."""
- def __init__(self, name, linenum):
+ def __init__(self, name, clean_lines, linenum):
self.name = name
self.linenum = linenum
self.seen_open_brace = False
@@ -1257,6 +1257,20 @@
self.has_virtual_destructor = False
self.brace_depth = 0
+ # Try to find the end of the class. This will be confused by things like:
+ # class A {
+ # } *x = { ...
+ #
+ # But it's still good enough for CheckSectionSpacing.
+ self.last_line = 0
+ depth = 0
+ for i in range(linenum, clean_lines.NumLines()):
+ line = clean_lines.lines[i]
+ depth += line.count('{') - line.count('}')
+ if not depth:
+ self.last_line = i
+ break
+
class _ClassState(object):
"""Holds the current state of the parse relating to class declarations.
@@ -1383,9 +1397,11 @@
# class LOCKABLE API Object {
# };
class_decl_match = Match(
- r'\s*(template\s*<[\w\s<>,:]*>\s*)?(class|struct)\s+([A-Z_]+\s+)*(\w+(::\w+)*)', line)
+ r'\s*(template\s*<[\w\s<>,:]*>\s*)?'
+ '(class|struct)\s+([A-Z_]+\s+)*(\w+(::\w+)*)', line)
if class_decl_match:
- classinfo_stack.append(_ClassInfo(class_decl_match.group(4), linenum))
+ classinfo_stack.append(_ClassInfo(
+ class_decl_match.group(4), clean_lines, linenum))
# Everything else in this function uses the top of the stack if it's
# not empty.
@@ -1415,12 +1431,12 @@
# Look for single-argument constructors that aren't marked explicit.
# Technically a valid construct, but against style.
- args = Match(r'(?<!explicit)\s+%s\s*\(([^,()]+)\)'
+ args = Match(r'\s+(?:inline\s+)?%s\s*\(([^,()]+)\)'
% re.escape(base_classname),
line)
if (args and
args.group(1) != 'void' and
- not Match(r'(const\s+)?%s\s*&' % re.escape(base_classname),
+ not Match(r'(const\s+)?%s\s*(?:<\w+>\s*)?&' % re.escape(base_classname),
args.group(1).strip())):
error(filename, linenum, 'runtime/explicit', 5,
'Single-argument constructors should be marked explicit.')
@@ -1511,8 +1527,14 @@
# If the ) is followed only by a newline or a { + newline, assume it's
# part of a control statement (if/while/etc), and don't complain
if Search(r'[^)]\s+\)\s*[^{\s]', fncall):
- error(filename, linenum, 'whitespace/parens', 2,
- 'Extra space before )')
+ # If the closing parenthesis is preceded by only whitespaces,
+ # try to give a more descriptive error message.
+ if Search(r'^\s+\)', fncall):
+ error(filename, linenum, 'whitespace/parens', 2,
+ 'Closing ) should be moved to the previous line')
+ else:
+ error(filename, linenum, 'whitespace/parens', 2,
+ 'Extra space before )')
def IsBlankLine(line):
@@ -1543,7 +1565,7 @@
Trivial bodies are unchecked, so constructors with huge initializer lists
may be missed.
Blank/comment lines are not counted so as to avoid encouraging the removal
- of vertical space and commments just to get through a lint check.
+ of vertical space and comments just to get through a lint check.
NOLINT *on the last line of a function* disables this check.
Args:
@@ -1639,8 +1661,8 @@
Things we check for: spaces around operators, spaces after
if/for/while/switch, no spaces around parens in function calls, two
spaces between code and comment, don't start a block with a blank
- line, don't end a function with a blank line, don't have too many
- blank lines in a row.
+ line, don't end a function with a blank line, don't add a blank line
+ after public/protected/private, don't have too many blank lines in a row.
Args:
filename: The name of the current file.
@@ -1667,7 +1689,7 @@
and prev_line[:prevbrace].find('namespace') == -1):
# OK, we have a blank line at the start of a code block. Before we
# complain, we check if it is an exception to the rule: The previous
- # non-empty line has the paramters of a function header that are indented
+ # non-empty line has the parameters of a function header that are indented
# 4 spaces (because they did not fit in a 80 column line when placed on
# the same line as the function name). We also check for the case where
# the previous line is indented 6 spaces, which may happen when the
@@ -1718,6 +1740,11 @@
error(filename, linenum, 'whitespace/blank_line', 3,
'Blank line at the end of a code block. Is this needed?')
+ matched = Match(r'\s*(public|protected|private):', prev_line)
+ if matched:
+ error(filename, linenum, 'whitespace/blank_line', 3,
+ 'Do not leave a blank line after "%s:"' % matched.group(1))
+
# Next, we complain if there's a comment too near the text
commentpos = line.find('//')
if commentpos != -1:
@@ -1838,10 +1865,11 @@
# Next we will look for issues with function calls.
CheckSpacingForFunctionCall(filename, line, linenum, error)
- # Except after an opening paren, you should have spaces before your braces.
- # And since you should never have braces at the beginning of a line, this is
- # an easy test.
- if Search(r'[^ (]{', line):
+ # Except after an opening paren, or after another opening brace (in case of
+ # an initializer list, for instance), you should have spaces before your
+ # braces. And since you should never have braces at the beginning of a line,
+ # this is an easy test.
+ if Search(r'[^ ({]{', line):
error(filename, linenum, 'whitespace/braces', 5,
'Missing space before {')
@@ -1873,6 +1901,58 @@
'statement, use { } instead.')
+def CheckSectionSpacing(filename, clean_lines, class_info, linenum, error):
+ """Checks for additional blank line issues related to sections.
+
+ Currently the only thing checked here is blank line before protected/private.
+
+ Args:
+ filename: The name of the current file.
+ clean_lines: A CleansedLines instance containing the file.
+ class_info: A _ClassInfo objects.
+ linenum: The number of the line to check.
+ error: The function to call with any errors found.
+ """
+ # Skip checks if the class is small, where small means 25 lines or less.
+ # 25 lines seems like a good cutoff since that's the usual height of
+ # terminals, and any class that can't fit in one screen can't really
+ # be considered "small".
+ #
+ # Also skip checks if we are on the first line. This accounts for
+ # classes that look like
+ # class Foo { public: ... };
+ #
+ # If we didn't find the end of the class, last_line would be zero,
+ # and the check will be skipped by the first condition.
+ if (class_info.last_line - class_info.linenum <= 24 or
+ linenum <= class_info.linenum):
+ return
+
+ matched = Match(r'\s*(public|protected|private):', clean_lines.lines[linenum])
+ if matched:
+ # Issue warning if the line before public/protected/private was
+ # not a blank line, but don't do this if the previous line contains
+ # "class" or "struct". This can happen two ways:
+ # - We are at the beginning of the class.
+ # - We are forward-declaring an inner class that is semantically
+ # private, but needed to be public for implementation reasons.
+ prev_line = clean_lines.lines[linenum - 1]
+ if (not IsBlankLine(prev_line) and
+ not Search(r'\b(class|struct)\b', prev_line)):
+ # Try a bit harder to find the beginning of the class. This is to
+ # account for multi-line base-specifier lists, e.g.:
+ # class Derived
+ # : public Base {
+ end_class_head = class_info.linenum
+ for i in range(class_info.linenum, linenum):
+ if Search(r'\{\s*$', clean_lines.lines[i]):
+ end_class_head = i
+ break
+ if end_class_head < linenum - 1:
+ error(filename, linenum, 'whitespace/blank_line', 3,
+ '"%s:" should be preceded by a blank line' % matched.group(1))
+
+
def GetPreviousNonBlankLine(clean_lines, linenum):
"""Return the most recent non-blank line and its line number.
@@ -2050,17 +2130,18 @@
"""
if isinstance(line, unicode):
width = 0
- for c in unicodedata.normalize('NFC', line):
- if unicodedata.east_asian_width(c) in ('W', 'F'):
+ for uc in unicodedata.normalize('NFC', line):
+ if unicodedata.east_asian_width(uc) in ('W', 'F'):
width += 2
- elif not unicodedata.combining(c):
+ elif not unicodedata.combining(uc):
width += 1
return width
else:
return len(line)
-def CheckStyle(filename, clean_lines, linenum, file_extension, error):
+def CheckStyle(filename, clean_lines, linenum, file_extension, class_state,
+ error):
"""Checks rules from the 'C++ style rules' section of cppguide.html.
Most of these rules are hard to test (naming, comment style), but we
@@ -2160,6 +2241,9 @@
CheckBraces(filename, clean_lines, linenum, error)
CheckSpacing(filename, clean_lines, linenum, error)
CheckCheck(filename, clean_lines, linenum, error)
+ if class_state and class_state.classinfo_stack:
+ CheckSectionSpacing(filename, clean_lines,
+ class_state.classinfo_stack[-1], linenum, error)
_RE_PATTERN_INCLUDE_NEW_STYLE = re.compile(r'#include +"[^/]+\.h"')
@@ -2345,6 +2429,63 @@
error(filename, linenum, 'readability/streams', 3,
'Streams are highly discouraged.')
+
+def _GetTextInside(text, start_pattern):
+ """Retrieves all the text between matching open and close parentheses.
+
+ Given a string of lines and a regular expression string, retrieve all the text
+ following the expression and between opening punctuation symbols like
+ (, [, or {, and the matching close-punctuation symbol. This properly nested
+ occurrences of the punctuations, so for the text like
+ printf(a(), b(c()));
+ a call to _GetTextInside(text, r'printf\(') will return 'a(), b(c())'.
+ start_pattern must match string having an open punctuation symbol at the end.
+
+ Args:
+ text: The lines to extract text. Its comments and strings must be elided.
+ It can be single line and can span multiple lines.
+ start_pattern: The regexp string indicating where to start extracting
+ the text.
+ Returns:
+ The extracted text.
+ None if either the opening string or ending punctuation could not be found.
+ """
+ # TODO(sugawarayu): Audit cpplint.py to see what places could be profitably
+ # rewritten to use _GetTextInside (and use inferior regexp matching today).
+
+ # Give opening punctuations to get the matching close-punctuations.
+ matching_punctuation = {'(': ')', '{': '}', '[': ']'}
+ closing_punctuation = set(matching_punctuation.itervalues())
+
+ # Find the position to start extracting text.
+ match = re.search(start_pattern, text, re.M)
+ if not match: # start_pattern not found in text.
+ return None
+ start_position = match.end(0)
+
+ assert start_position > 0, (
+ 'start_pattern must ends with an opening punctuation.')
+ assert text[start_position - 1] in matching_punctuation, (
+ 'start_pattern must ends with an opening punctuation.')
+ # Stack of closing punctuations we expect to have in text after position.
+ punctuation_stack = [matching_punctuation[text[start_position - 1]]]
+ position = start_position
+ while punctuation_stack and position < len(text):
+ if text[position] == punctuation_stack[-1]:
+ punctuation_stack.pop()
+ elif text[position] in closing_punctuation:
+ # A closing punctuation without matching opening punctuations.
+ return None
+ elif text[position] in matching_punctuation:
+ punctuation_stack.append(matching_punctuation[text[position]])
+ position += 1
+ if punctuation_stack:
+ # Opening punctuations left without matching close-punctuations.
+ return None
+ # punctuations match.
+ return text[start_position:position - 1]
+
+
def CheckLanguage(filename, clean_lines, linenum, file_extension, include_state,
error):
"""Checks rules from the 'C++ language rules' section of cppguide.html.
@@ -2390,7 +2531,7 @@
# These are complicated re's. They try to capture the following:
# paren (for fn-prototype start), typename, &, varname. For the const
# version, we're willing for const to be before typename or after
- # Don't check the implemention on same line.
+ # Don't check the implementation on same line.
fnline = line.split('{', 1)[0]
if (len(re.findall(r'\([^()]*\b(?:[\w:]|<[^()]*>)+(\s?&|&\s?)\w+', fnline)) >
len(re.findall(r'\([^()]*\bconst\s+(?:typename\s+)?(?:struct\s+)?'
@@ -2430,11 +2571,19 @@
CheckCStyleCast(filename, linenum, line, clean_lines.raw_lines[linenum],
'static_cast',
- r'\((int|float|double|bool|char|u?int(16|32|64))\)',
- error)
- # This doesn't catch all cases. Consider (const char * const)"hello".
- CheckCStyleCast(filename, linenum, line, clean_lines.raw_lines[linenum],
- 'reinterpret_cast', r'\((\w+\s?\*+\s?)\)', error)
+ r'\((int|float|double|bool|char|u?int(16|32|64))\)', error)
+
+ # This doesn't catch all cases. Consider (const char * const)"hello".
+ #
+ # (char *) "foo" should always be a const_cast (reinterpret_cast won't
+ # compile).
+ if CheckCStyleCast(filename, linenum, line, clean_lines.raw_lines[linenum],
+ 'const_cast', r'\((char\s?\*+\s?)\)\s*"', error):
+ pass
+ else:
+ # Check pointer casts for other than string constants
+ CheckCStyleCast(filename, linenum, line, clean_lines.raw_lines[linenum],
+ 'reinterpret_cast', r'\((\w+\s?\*+\s?)\)', error)
# In addition, we look for people taking the address of a cast. This
# is dangerous -- casts can assign to temporaries, so the pointer doesn't
@@ -2533,11 +2682,19 @@
# Check for potential format string bugs like printf(foo).
# We constrain the pattern not to pick things like DocidForPrintf(foo).
# Not perfect but it can catch printf(foo.c_str()) and printf(foo->c_str())
- match = re.search(r'\b((?:string)?printf)\s*\(([\w.\->()]+)\)', line, re.I)
- if match:
- error(filename, linenum, 'runtime/printf', 4,
- 'Potential format string bug. Do %s("%%s", %s) instead.'
- % (match.group(1), match.group(2)))
+ # TODO(sugawarayu): Catch the following case. Need to change the calling
+ # convention of the whole function to process multiple line to handle it.
+ # printf(
+ # boy_this_is_a_really_long_variable_that_cannot_fit_on_the_prev_line);
+ printf_args = _GetTextInside(line, r'(?i)\b(string)?printf\s*\(')
+ if printf_args:
+ match = Match(r'([\w.\->()]+)$', printf_args)
+ if match:
+ function_name = re.search(r'\b((?:string)?printf)\s*\(',
+ line, re.I).group(1)
+ error(filename, linenum, 'runtime/printf', 4,
+ 'Potential format string bug. Do %s("%%s", %s) instead.'
+ % (function_name, match.group(1)))
# Check for potential memset bugs like memset(buf, sizeof(buf), 0).
match = Search(r'memset\s*\(([^,]*),\s*([^,]*),\s*0\s*\)', line)
@@ -2579,7 +2736,7 @@
if Match(r'(.+::)?[A-Z][A-Z0-9_]*', tok): continue
# A catch all for tricky sizeof cases, including 'sizeof expression',
# 'sizeof(*type)', 'sizeof(const type)', 'sizeof(struct StructName)'
- # requires skipping the next token becasue we split on ' ' and '*'.
+ # requires skipping the next token because we split on ' ' and '*'.
if tok.startswith('sizeof'):
skip_next = True
continue
@@ -2600,7 +2757,13 @@
line)
if match and linenum + 1 < clean_lines.NumLines():
next_line = clean_lines.elided[linenum + 1]
- if not Search(r'^\s*};', next_line):
+ # We allow some, but not all, declarations of variables to be present
+ # in the statement that defines the class. The [\w\*,\s]* fragment of
+ # the regular expression below allows users to declare instances of
+ # the class or pointers to instances, but not less common types such
+ # as function pointers or arrays. It's a tradeoff between allowing
+ # reasonable code and avoiding trying to parse more C++ using regexps.
+ if not Search(r'^\s*}[\w\*,\s]*;', next_line):
error(filename, linenum, 'readability/constructors', 3,
match.group(1) + ' should be the last thing in the class')
@@ -2628,20 +2791,24 @@
line: The line of code to check.
raw_line: The raw line of code to check, with comments.
cast_type: The string for the C++ cast to recommend. This is either
- reinterpret_cast or static_cast, depending.
+ reinterpret_cast, static_cast, or const_cast, depending.
pattern: The regular expression used to find C-style casts.
error: The function to call with any errors found.
+
+ Returns:
+ True if an error was emitted.
+ False otherwise.
"""
match = Search(pattern, line)
if not match:
- return
+ return False
# e.g., sizeof(int)
sizeof_match = Match(r'.*sizeof\s*$', line[0:match.start(1) - 1])
if sizeof_match:
error(filename, linenum, 'runtime/sizeof', 1,
'Using sizeof(type). Use sizeof(varname) instead if possible')
- return
+ return True
remainder = line[match.end(0):]
@@ -2665,13 +2832,15 @@
'/*' not in raw_line)):
error(filename, linenum, 'readability/function', 3,
'All parameters should be named in a function')
- return
+ return True
# At this point, all that should be left is actual casts.
error(filename, linenum, 'readability/casting', 4,
'Using C-style cast. Use %s<%s>(...) instead' %
(cast_type, match.group(1)))
+ return True
+
_HEADERS_CONTAINING_TEMPLATES = (
('<deque>', ('deque',)),
@@ -2710,11 +2879,6 @@
('<slist>', ('slist',)),
)
-_HEADERS_ACCEPTED_BUT_NOT_PROMOTED = {
- # We can trust with reasonable confidence that map gives us pair<>, too.
- 'pair<>': ('map', 'multimap', 'hash_map', 'hash_multimap')
-}
-
_RE_PATTERN_STRING = re.compile(r'\bstring\b')
_re_pattern_algorithm_header = []
@@ -2847,11 +3011,11 @@
continue
# String is special -- it is a non-templatized type in STL.
- m = _RE_PATTERN_STRING.search(line)
- if m:
+ matched = _RE_PATTERN_STRING.search(line)
+ if matched:
# Don't warn about strings in non-STL namespaces:
# (We check only the first match per line; good enough.)
- prefix = line[:m.start()]
+ prefix = line[:matched.start()]
if prefix.endswith('std::') or not prefix.endswith('::'):
required['<string>'] = (linenum, 'string')
@@ -2889,7 +3053,8 @@
# include_state is modified during iteration, so we iterate over a copy of
# the keys.
- for header in include_state.keys(): #NOLINT
+ header_keys = include_state.keys()
+ for header in header_keys:
(same_module, common_path) = FilesBelongToSameModule(abs_filename, header)
fullpath = common_path + header
if same_module and UpdateIncludeState(fullpath, include_state, io):
@@ -2906,16 +3071,37 @@
# All the lines have been processed, report the errors found.
for required_header_unstripped in required:
template = required[required_header_unstripped][1]
- if template in _HEADERS_ACCEPTED_BUT_NOT_PROMOTED:
- headers = _HEADERS_ACCEPTED_BUT_NOT_PROMOTED[template]
- if [True for header in headers if header in include_state]:
- continue
if required_header_unstripped.strip('<>"') not in include_state:
error(filename, required[required_header_unstripped][0],
'build/include_what_you_use', 4,
'Add #include ' + required_header_unstripped + ' for ' + template)
+_RE_PATTERN_EXPLICIT_MAKEPAIR = re.compile(r'\bmake_pair\s*<')
+
+
+def CheckMakePairUsesDeduction(filename, clean_lines, linenum, error):
+ """Check that make_pair's template arguments are deduced.
+
+ G++ 4.6 in C++0x mode fails badly if make_pair's template arguments are
+ specified explicitly, and such use isn't intended in any case.
+
+ 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.
+ """
+ raw = clean_lines.raw_lines
+ line = raw[linenum]
+ match = _RE_PATTERN_EXPLICIT_MAKEPAIR.search(line)
+ if match:
+ error(filename, linenum, 'build/explicit_make_pair',
+ 4, # 4 = high confidence
+ 'Omit template arguments from make_pair OR use pair directly OR'
+ ' if appropriate, construct a pair directly')
+
+
def ProcessLine(filename, file_extension,
clean_lines, line, include_state, function_state,
class_state, error, extra_check_functions=[]):
@@ -2941,13 +3127,14 @@
ParseNolintSuppressions(filename, raw_lines[line], line, error)
CheckForFunctionLengths(filename, clean_lines, line, function_state, error)
CheckForMultilineCommentsAndStrings(filename, clean_lines, line, error)
- CheckStyle(filename, clean_lines, line, file_extension, error)
+ CheckStyle(filename, clean_lines, line, file_extension, class_state, error)
CheckLanguage(filename, clean_lines, line, file_extension, include_state,
error)
CheckForNonStandardConstructs(filename, clean_lines, line,
class_state, error)
CheckPosixThreading(filename, clean_lines, line, error)
CheckInvalidIncrement(filename, clean_lines, line, error)
+ CheckMakePairUsesDeduction(filename, clean_lines, line, error)
for check_fn in extra_check_functions:
check_fn(filename, clean_lines, line, error)
@@ -2959,7 +3146,7 @@
filename: Filename of the file that is being processed.
file_extension: The extension (dot not included) of the file.
lines: An array of strings, each representing a line of the file, with the
- last element being empty if the file is termined with a newline.
+ last element being empty if the file is terminated with a newline.
error: A callable to which errors are reported, which takes 4 arguments:
filename, line number, error level, and message
extra_check_functions: An array of additional check functions that will be
@@ -3055,7 +3242,7 @@
ProcessFileData(filename, file_extension, lines, Error,
extra_check_functions)
if carriage_return_found and os.linesep != '\r\n':
- # Use 0 for linenum since outputing only one error for potentially
+ # Use 0 for linenum since outputting only one error for potentially
# several lines.
Error(filename, 0, 'whitespace/newline', 1,
'One or more unexpected \\r (^M) found;'