forked from OSchip/llvm-project
774b584f42
Various value handles needed to be copy constructible and copy assignable (mostly for their use in DenseMap). But to avoid an API that might allow accidental slicing, make these members protected in the base class and make derived classes final (the special members become implicitly public there - but disallowing further derived classes that might be sliced to the intermediate type). Might be worth having a warning a bit like -Wnon-virtual-dtor that catches public move/copy assign/ctors in classes with virtual functions. (suppressable in the same way - by making them protected in the base, and making the derived classes final) Could be fancier and only diagnose them when they're actually called, potentially. Also allow a few default implementations where custom implementations (especially with non-standard return types) were implemented. llvm-svn: 243909 |
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