Emulate a MSVC bug where if during an using declaration name lookup, the declaration found is unaccessible (private) and that declaration was bring into scope via another using declaration whose target declaration is accessible (public) then no error is generated.

Example:
class A { public: int f();  };
class B : public A { private: using A::f; };
class C : public B { private: using B::f; };

Here, B::f is private so this should fail in Standard C++, but because B::f refers to A::f which is public MSVC accepts it.

This fixes 1 error when parsing MFC code with clang.

llvm-svn: 131896

1 files changed, 1 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 4fc9bf1fdd5..8bf7cb67b88 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -5345,6 +5345,7 @@ NamedDecl *Sema::BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
   // Otherwise, look up the target name.
 
   LookupResult R(*this, NameInfo, LookupOrdinaryName);
+  R.setUsingDeclaration(true);
 
   // Unlike most lookups, we don't always want to hide tag
   // declarations: tag names are visible through the using declaration