| .. title:: clang-tidy - google-objc-avoid-throwing-exception |
| |
| google-objc-avoid-throwing-exception |
| ==================================== |
| |
| Finds uses of throwing exceptions usages in Objective-C files. |
| |
| For the same reason as the Google C++ style guide, we prefer not throwing |
| exceptions from Objective-C code. |
| |
| The corresponding C++ style guide rule: |
| https://google.github.io/styleguide/cppguide.html#Exceptions |
| |
| Instead, prefer passing in ``NSError **`` and return ``BOOL`` to indicate success or failure. |
| |
| A counterexample: |
| |
| .. code-block:: objc |
| |
| - (void)readFile { |
| if ([self isError]) { |
| @throw [NSException exceptionWithName:...]; |
| } |
| } |
| |
| Instead, returning an error via ``NSError **`` is preferred: |
| |
| .. code-block:: objc |
| |
| - (BOOL)readFileWithError:(NSError **)error { |
| if ([self isError]) { |
| *error = [NSError errorWithDomain:...]; |
| return NO; |
| } |
| return YES; |
| } |
| |
| The corresponding style guide rule: |
| http://google.github.io/styleguide/objcguide.html#avoid-throwing-exceptions |