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.. 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
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