Add a castAs<U> accessor to CanQual<T>.

llvm-svn: 150786

1 files changed, 9 insertions, 0 deletions

diff --git a/clang/include/clang/AST/CanonicalType.h b/clang/include/clang/AST/CanonicalType.h
index 38e6b41977f..6cce88868db 100644
--- a/clang/include/clang/AST/CanonicalType.h
+++ b/clang/include/clang/AST/CanonicalType.h
@@ -108,6 +108,8 @@ public:
   /// or a derived class thereof, a NULL canonical type.
   template<typename U> CanProxy<U> getAs() const;
 
+  template<typename U> CanProxy<U> castAs() const;
+
   /// \brief Overloaded arrow operator that produces a canonical type
   /// proxy.
   CanProxy<T> operator->() const;
@@ -753,6 +755,13 @@ CanProxy<U> CanQual<T>::getAs() const {
 }
 
 template<typename T>
+template<typename U>
+CanProxy<U> CanQual<T>::castAs() const {
+  assert(!Stored.isNull() && isa<U>(Stored.getTypePtr()));
+  return CanQual<U>::CreateUnsafe(Stored);
+}
+
+template<typename T>
 CanProxy<T> CanQual<T>::operator->() const {
   return CanProxy<T>(*this);
 }