From 7ca1269cd53c58e21bb318539315d2bca28b9e73 Mon Sep 17 00:00:00 2001
From: Serge Guelton <sguelton@quarkslab.com>
Date: Thu, 19 Jul 2018 09:24:34 +0000
Subject: [PATCH] Use std::reference_wrapper instead of llvm::ReferenceStorage

Reviewed By: Bigcheese
Differential Revision: https://reviews.llvm.org/D49298

llvm-svn: 337444
---
 llvm/include/llvm/Support/Error.h   |  2 +-
 llvm/include/llvm/Support/ErrorOr.h | 14 +-------------
 2 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/llvm/include/llvm/Support/Error.h b/llvm/include/llvm/Support/Error.h
index b026dae..3ea567b 100644
--- a/llvm/include/llvm/Support/Error.h
+++ b/llvm/include/llvm/Support/Error.h
@@ -429,7 +429,7 @@ template <class T> class LLVM_NODISCARD Expected {
 
   static const bool isRef = std::is_reference<T>::value;
 
-  using wrap = ReferenceStorage<typename std::remove_reference<T>::type>;
+  using wrap = std::reference_wrapper<typename std::remove_reference<T>::type>;
 
   using error_type = std::unique_ptr<ErrorInfoBase>;
 
diff --git a/llvm/include/llvm/Support/ErrorOr.h b/llvm/include/llvm/Support/ErrorOr.h
index fdf2d6c..e6ce764 100644
--- a/llvm/include/llvm/Support/ErrorOr.h
+++ b/llvm/include/llvm/Support/ErrorOr.h
@@ -24,18 +24,6 @@
 
 namespace llvm {
 
-/// Stores a reference that can be changed.
-template <typename T>
-class ReferenceStorage {
-  T *Storage;
-
-public:
-  ReferenceStorage(T &Ref) : Storage(&Ref) {}
-
-  operator T &() const { return *Storage; }
-  T &get() const { return *Storage; }
-};
-
 /// Represents either an error or a value T.
 ///
 /// ErrorOr<T> is a pointer-like class that represents the result of an
@@ -71,7 +59,7 @@ class ErrorOr {
 
   static const bool isRef = std::is_reference<T>::value;
 
-  using wrap = ReferenceStorage<typename std::remove_reference<T>::type>;
+  using wrap = std::reference_wrapper<typename std::remove_reference<T>::type>;
 
 public:
   using storage_type = typename std::conditional<isRef, wrap, T>::type;
-- 
2.7.4