[arcmt] Before applying '__weak' check whether the objc class is annotated with objc_arc_weak_reference_unavailable
or is in a list of classes not supporting 'weak'.
rdar://9489367.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135002 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ARCMigrate/Transforms.h b/lib/ARCMigrate/Transforms.h
index 2106497..d52fba0 100644
--- a/lib/ARCMigrate/Transforms.h
+++ b/lib/ARCMigrate/Transforms.h
@@ -44,6 +44,9 @@
// Helpers.
//===----------------------------------------------------------------------===//
+/// \brief Determine whether we can add weak to the given type.
+bool canApplyWeak(ASTContext &Ctx, QualType type);
+
/// \brief 'Loc' is the end of a statement range. This returns the location
/// immediately after the semicolon following the statement.
/// If no semicolon is found or the location is inside a macro, the returned