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-rw-r--r--lib/Sema/SemaExprMember.cpp15
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/Sema/SemaExprMember.cpp b/lib/Sema/SemaExprMember.cpp
index 22b23150d1..d5e83ce8ae 100644
--- a/lib/Sema/SemaExprMember.cpp
+++ b/lib/Sema/SemaExprMember.cpp
@@ -1149,7 +1149,20 @@ Sema::LookupMemberExpr(LookupResult &R, ExprResult &BaseExpr,
ObjCImpDecl, HasTemplateArgs);
goto fail;
}
-
+ else if (Member && Member->isStr("isa")) {
+ // If an ivar is (1) the first ivar in a root class and (2) named `isa`,
+ // then issue the same deprecated warning that id->isa gets.
+ ObjCInterfaceDecl *ClassDeclared = 0;
+ if (ObjCIvarDecl *IV =
+ IDecl->lookupInstanceVariable(Member, ClassDeclared)) {
+ if (!ClassDeclared->getSuperClass()
+ && (*ClassDeclared->ivar_begin()) == IV) {
+ Diag(MemberLoc, diag::warn_objc_isa_use);
+ Diag(IV->getLocation(), diag::note_ivar_decl);
+ }
+ }
+ }
+
if (RequireCompleteType(OpLoc, BaseType, diag::err_typecheck_incomplete_tag,
BaseExpr.get()))
return ExprError();