From 58a644cfdee53275e3d07eff0c2126dc88b87aef Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Fri, 5 Aug 2022 15:17:20 +0100
Subject: [PATCH] libstdc++: Add feature test macro for <experimental/scope>
libstdc++-v3/ChangeLog:
* include/experimental/scope (__cpp_lib_experimental_scope):
Define.
* testsuite/experimental/scopeguard/uniqueres.cc: Check macro.
---
libstdc++-v3/include/experimental/scope | 2 ++
libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/libstdc++-v3/include/experimental/scope b/libstdc++-v3/include/experimental/scope
index 37a57b38af73..208fadc513e4 100644
--- a/libstdc++-v3/include/experimental/scope
+++ b/libstdc++-v3/include/experimental/scope
@@ -43,6 +43,8 @@ namespace std _GLIBCXX_VISIBILITY(default)
_GLIBCXX_BEGIN_NAMESPACE_VERSION
namespace experimental::inline fundamentals_v3
{
+#define __cpp_lib_experimental_scope 201902
+
template<typename _Tp, typename _Up>
concept __not_same_as = !same_as<_Tp, _Up>;
diff --git a/libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc b/libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc
index 7690572ab190..fe9d6ee7cfc6 100644
--- a/libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc
+++ b/libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc
@@ -4,6 +4,12 @@
#include <experimental/scope>
#include <testsuite_hooks.h>
+#ifndef __cpp_lib_experimental_scope
+# error Feature-test macro is not defined.
+#elif __cpp_lib_experimental_scope < 201902
+# error Feature-test macro has bad value.
+#endif
+
using std::experimental::unique_resource;
void
--
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