Add Type::getAsFunctionNoProto


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65031 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index 53363c1..8032424 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -216,6 +216,10 @@
   return getDesugaredType()->getAsFunctionType();
 }
 
+const FunctionTypeNoProto *Type::getAsFunctionTypeNoProto() const {
+  return dyn_cast_or_null<FunctionTypeNoProto>(getAsFunctionType());
+}
+
 const FunctionTypeProto *Type::getAsFunctionTypeProto() const {
   return dyn_cast_or_null<FunctionTypeProto>(getAsFunctionType());
 }