From 49bffbbf21ce093985e1a15ff0f8f3f3f096fe93 Mon Sep 17 00:00:00 2001
From: "A. Jiang" <de34@live.cn>
Date: Thu, 28 Jul 2022 11:36:58 +0800
Subject: [PATCH] Implement LWG-3671: `atomic_fetch_xor` missing from
 `stdatomic.h` (#2905)

---
 stl/inc/stdatomic.h                                       | 2 ++
 tests/std/tests/P0943R6_stdatomic_h/test.compile.pass.cpp | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/stl/inc/stdatomic.h b/stl/inc/stdatomic.h
index 82cbc5795ad..29838b8c06c 100644
--- a/stl/inc/stdatomic.h
+++ b/stl/inc/stdatomic.h
@@ -117,6 +117,8 @@ using _STD atomic_fetch_sub;
 using _STD atomic_fetch_sub_explicit;
 using _STD atomic_fetch_or;
 using _STD atomic_fetch_or_explicit;
+using _STD atomic_fetch_xor;
+using _STD atomic_fetch_xor_explicit;
 using _STD atomic_fetch_and;
 using _STD atomic_fetch_and_explicit;
 using _STD atomic_flag_test_and_set;
diff --git a/tests/std/tests/P0943R6_stdatomic_h/test.compile.pass.cpp b/tests/std/tests/P0943R6_stdatomic_h/test.compile.pass.cpp
index 5679d5b36f9..5f3322f7d76 100644
--- a/tests/std/tests/P0943R6_stdatomic_h/test.compile.pass.cpp
+++ b/tests/std/tests/P0943R6_stdatomic_h/test.compile.pass.cpp
@@ -101,6 +101,8 @@ namespace test {
     using ::atomic_fetch_or_explicit;
     using ::atomic_fetch_sub;
     using ::atomic_fetch_sub_explicit;
+    using ::atomic_fetch_xor;
+    using ::atomic_fetch_xor_explicit;
     using ::atomic_flag_clear;
     using ::atomic_flag_clear_explicit;
     using ::atomic_flag_test_and_set;