rjmccall added a comment. For ARC, you could bzero the union member; this is what how we tell people to initialize malloc'ed memory as well, since there's no default-constructor concept that they can invoke for such cases.
Our immediate need for this attribute is that we have some code that wants to adopt non-trivial annotations in unions, with no intention of ever copying or destroying them as aggregates. Of course a better solution would be to make any C code that would copy or destroy the aggregate type illegal, but that seems like a big project. But maybe there'd be no need for this attribute in the long term if we eventually do have that support. Repository: rC Clang CHANGES SINCE LAST ACTION https://reviews.llvm.org/D62988/new/ https://reviews.llvm.org/D62988 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
