libstdc++: Define and use chrono::is_clock for C++20

[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 30_threads / shared_future / members / clock_neg.cc

diff --git a/libstdc++-v3/testsuite/30_threads/shared_future/members/clock_neg.cc b/libstdc++-v3/testsuite/30_threads/shared_future/members/clock_neg.cc
new file mode 100644 (file)
index 0000000..59f63cc
--- /dev/null
+++ b/libstdc++-v3/testsuite/30_threads/shared_future/members/clock_neg.cc
@@ -0,0 +1,59 @@
+// Copyright (C) 2020 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-options "-std=gnu++2a" }
+// { dg-do compile { target c++2a } }
+
+#include <future>
+
+struct clok
+{
+  // no clok::rep or clok::period defined
+  using duration = std::chrono::milliseconds;
+  using time_point = std::chrono::time_point<clok>;
+  static constexpr bool is_steady = false;
+  static time_point now();
+};
+
+void
+test01()
+{
+  std::promise<void> p;
+  std::shared_future<void> f = p.get_future();
+  f.wait_until(clok::now()); // { dg-error "here" }
+}
+
+struct cloc
+{
+  using duration = std::chrono::milliseconds;
+  using rep = duration::rep;
+  using period = duration::period;
+  // cloc::time_point::duration should be the same as cloc::duration:
+  using time_point = std::chrono::time_point<cloc, std::chrono::seconds>;
+  static constexpr bool is_steady = false;
+  static time_point now();
+};
+
+void
+test02()
+{
+  std::promise<void> p;
+  std::shared_future<void> f = p.get_future();
+  f.wait_until(cloc::now()); // { dg-error "here" }
+}
+
+// { dg-error "static assertion failed" "" { target *-*-* } 0 }