[llvm] r322487 - Allow function_ref(nullptr) like std::function, since it's nullable already

[Sam McCall via llvm-commits]

Author: sammccall
Date: Mon Jan 15 06:43:04 2018
New Revision: 322487

URL: http://llvm.org/viewvc/llvm-project?rev=322487&view=rev
Log:
Allow function_ref(nullptr) like std::function, since it's nullable already

Modified:
    llvm/trunk/include/llvm/ADT/STLExtras.h

Modified: llvm/trunk/include/llvm/ADT/STLExtras.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/STLExtras.h?rev=322487&r1=322486&r2=322487&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/STLExtras.h (original)
+++ llvm/trunk/include/llvm/ADT/STLExtras.h Mon Jan 15 06:43:04 2018
@@ -101,6 +101,7 @@ class function_ref<Ret(Params...)> {
 
 public:
   function_ref() = default;
+  function_ref(std::nullptr_t) {}
 
   template <typename Callable>
   function_ref(Callable &&callable,