AST: Rework @objcMembers inheritance to not depend on validation order #21260
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Sema would directly check for the presence of the @objcMembers attribute, and inherit it from the immediate superclass in validateDecl(). We don't want validateDecl() to have side effects like this and this was already a problem, because it would not inherit the attribute transitively in some cases. Instead, add a ClassDecl::hasObjCMembers() method that walks over all ancestors and caches the result. <rdar://problem/46420252>
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Not this patch. |
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Sema would directly check for the presence of the @objcMembers attribute,
and inherit it from the immediate superclass in validateDecl().
We don't want validateDecl() to have side effects like this and this was
already a problem, because it would not inherit the attribute transitively
in some cases.
Instead, add a ClassDecl::hasObjCMembers() method that walks over all
ancestors and caches the result.
rdar://problem/46420252