[PATCH] D31003: [Objective-C] C++ Classes with __weak Members non-POD Types when using -fobjc-weak

Brian T. Kelley via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Wed Mar 15 15:25:49 PDT 2017

bkelley created this revision.

When adding an Objective-C retainable type member to a C++ class, also check the LangOpts.ObjCWeak flag and the lifetime qualifier so __weak qualified Objective-C pointer members cause the class to be a non-POD type with non-trivial special members, so the compiler always emits the necessary runtime calls for copying, moving, and destroying the weak member. Otherwise, Objective-C++ classes with weak Objective-C pointer members compiled with -fobjc-weak exhibit undefined behavior if the C++ class is classified as a POD type.



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