Function CheckLanguage

rtpose_wrapper/scripts/cpp_lint.py:3834–4132

Checks rules from the 'C++ language rules' section of cppguide.html. Some of these rules are hard to test (function overloading, using uint32 inappropriately), but we do the best we can. Args: filename: The name of the current file. clean_lines: A CleansedLines instance containing th

(filename, clean_lines, linenum, file_extension,
                  include_state, nesting_state, error)

def CheckLanguage(filename, clean_lines, linenum, file_extension,
                  include_state, nesting_state, error):
  """Checks rules from the 'C++ language rules' section of cppguide.html.

  Some of these rules are hard to test (function overloading, using
  uint32 inappropriately), but we do the best we can.

  Args:
    filename: The name of the current file.
    clean_lines: A CleansedLines instance containing the file.
    linenum: The number of the line to check.
    file_extension: The extension (without the dot) of the filename.
    include_state: An _IncludeState instance in which the headers are inserted.
    nesting_state: A _NestingState instance which maintains information about
                   the current stack of nested blocks being parsed.
    error: The function to call with any errors found.
  """
  # If the line is empty or consists of entirely a comment, no need to
  # check it.
  line = clean_lines.elided[linenum]
  if not line:
    return

  match = _RE_PATTERN_INCLUDE.search(line)
  if match:
    CheckIncludeLine(filename, clean_lines, linenum, include_state, error)
    return

  # Reset include state across preprocessor directives.  This is meant
  # to silence warnings for conditional includes.
  if Match(r'^\s*#\s*(?:ifdef|elif|else|endif)\b', line):
    include_state.ResetSection()

  # Make Windows paths like Unix.
  fullname = os.path.abspath(filename).replace('\\', '/')

  # TODO(unknown): figure out if they're using default arguments in fn proto.

  # Check to see if they're using an conversion function cast.
  # I just try to capture the most common basic types, though there are more.
  # Parameterless conversion functions, such as bool(), are allowed as they are
  # probably a member operator declaration or default constructor.
  match = Search(
      r'(\bnew\s+)?\b'  # Grab 'new' operator, if it's there
      r'(int|float|double|bool|char|int32|uint32|int64|uint64)'
      r'(\([^)].*)', line)
  if match:
    matched_new = match.group(1)
    matched_type = match.group(2)
    matched_funcptr = match.group(3)

    # gMock methods are defined using some variant of MOCK_METHODx(name, type)
    # where type may be float(), int(string), etc.  Without context they are
    # virtually indistinguishable from int(x) casts. Likewise, gMock's
    # MockCallback takes a template parameter of the form return_type(arg_type),
    # which looks much like the cast we're trying to detect.
    #
    # std::function<> wrapper has a similar problem.