From ef64b9640e8f7b71f491c6053748cdb639909645 Mon Sep 17 00:00:00 2001
From: mbbill <mbbill@gmail.com>
Date: Wed, 20 May 2020 03:04:09 -0700
Subject: [PATCH] Another backward incompatibility issue with llvm.

---
 Source/WTF/wtf/DeprecatedOptional.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Source/WTF/wtf/DeprecatedOptional.h b/Source/WTF/wtf/DeprecatedOptional.h
index 9b1558d..27da45c 100644
--- a/Source/WTF/wtf/DeprecatedOptional.h
+++ b/Source/WTF/wtf/DeprecatedOptional.h
@@ -31,8 +31,9 @@
 
 #include <type_traits>
 #include <wtf/Optional.h>
+#include <optional>
 
-namespace std {
+namespace std_1 {
 
 template <class T>
 class optional : private WTF::OptionalBase<T> {
@@ -45,6 +46,6 @@ class optional : private WTF::OptionalBase<T> {
 
 namespace WTF {
 
-template<typename T> using DeprecatedOptional = std::optional<T>;
+template<typename T> using DeprecatedOptional = std_1::optional<T>;
 
 } // namespace WTF