|  | //===- Optional.cpp - Optional values ---------------------------*- C++ -*-===// | 
|  | // | 
|  | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | 
|  | // See https://llvm.org/LICENSE.txt for license information. | 
|  | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | 
|  | // | 
|  | //===----------------------------------------------------------------------===// | 
|  |  | 
|  | #include "llvm/ADT/Optional.h" | 
|  | #include "llvm/Support/raw_ostream.h" | 
|  |  | 
|  | llvm::raw_ostream &llvm::operator<<(raw_ostream &OS, NoneType) { | 
|  | return OS << "None"; | 
|  | } |