Fix support for const_cast<>s of array types which actual change the

CV-qualifiers. Remove an error expectation from the 'good' set of const-cast
test cases. With this patch, the final non-template test case from PR5542
passes. (It's the same as the one already in const-cast.cpp.)

llvm-svn: 92257

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/lib/Sema/SemaCXXCast.cpp b/clang/lib/Sema/SemaCXXCast.cpp
index 045ffb20deb..800c544d336 100644
--- a/clang/lib/Sema/SemaCXXCast.cpp
+++ b/clang/lib/Sema/SemaCXXCast.cpp
@@ -959,8 +959,9 @@ static TryCastResult TryConstCast(Sema &Self, Expr *SrcExpr, QualType DestType,
   // as must be the final pointee type.
   while (SrcType != DestType &&
          Self.UnwrapSimilarPointerTypes(SrcType, DestType)) {
-    SrcType = SrcType.getUnqualifiedType();
-    DestType = DestType.getUnqualifiedType();
+    Qualifiers Quals;
+    SrcType = Self.Context.getUnqualifiedArrayType(SrcType, Quals);
+    DestType = Self.Context.getUnqualifiedArrayType(DestType, Quals);
   }
 
   // Since we're dealing in canonical types, the remainder must be the same.