From aca0dcde1ff2b81eb6335bdf2e8ae73f7519c99a Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Mon, 8 Oct 2018 13:17:58 +0100
Subject: [PATCH] PR libstdc++/87538 Verify fix for std::experimental::not_fn

	PR libstdc++/87538
	* testsuite/experimental/functional/87538.cc: New test.

From-SVN: r264922
---
 libstdc++-v3/ChangeLog                        |  3 ++
 .../experimental/functional/87538.cc          | 48 +++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 libstdc++-v3/testsuite/experimental/functional/87538.cc

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index aec162913c2..12dee3a273c 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,8 @@
 2018-10-08  Jonathan Wakely  <jwakely@redhat.com>
 
+	PR libstdc++/87538
+	* testsuite/experimental/functional/87538.cc: New test.
+
 	PR libstdc++/87538
 	* include/std/functional (_Not_fn::operator()): Check value of
 	__is_nothrow_invocable as well.
diff --git a/libstdc++-v3/testsuite/experimental/functional/87538.cc b/libstdc++-v3/testsuite/experimental/functional/87538.cc
new file mode 100644
index 00000000000..1ee9ecd55f3
--- /dev/null
+++ b/libstdc++-v3/testsuite/experimental/functional/87538.cc
@@ -0,0 +1,48 @@
+// Copyright (C) 2018 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-do run { target c++14 } }
+
+#include <experimental/functional>
+#include <testsuite_hooks.h>
+
+struct N {
+  int operator()(int i) { if (i == 0) throw -1; return i; }
+};
+
+void
+test01()
+{
+  N n;
+  auto not_n = std::experimental::not_fn(n);
+  static_assert( !noexcept(not_n(1)), "can throw" );
+  VERIFY(not_n(1) == 0);
+  int exception = 0;
+  try {
+    not_n(0);
+  }
+  catch (int e) {
+    exception = e;
+  }
+  VERIFY(exception == -1);
+}
+
+int
+main()
+{
+  test01();
+}