Allow reference binding of a reference of Objective-C object type to

an lvalue of another, compatible Objective-C object type (e.g., a
subclass). Introduce a new initialization sequence step kind to
describe this binding, along with a new cast kind. Fixes PR7741.

llvm-svn: 110513

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 22e1ebf5697..2c16c073483 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -4560,6 +4560,12 @@ bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) {
          canAssignObjCInterfaces(RHSOPT, LHSOPT);
 }
 
+bool ASTContext::canBindObjCObjectType(QualType To, QualType From) {
+  return canAssignObjCInterfaces(
+                getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(),
+                getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>());
+}
+
 /// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible,
 /// both shall have the identically qualified version of a compatible type.
 /// C99 6.2.7p1: Two types have compatible types if their types are the