+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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/>.
+
+// 20.9.11.2 Class template shared_ptr [util.smartptr.shared]
+
+#include <memory>
+#include <cstddef>
+#include <testsuite_hooks.h>
+#include <testsuite_allocator.h>
+
+// 20.9.11.2.1 shared_ptr constructors [util.smartptr.shared.const]
+
+// Construction from nullptr
+
+struct deleter
+{
+ int count;
+ deleter() : count(0) { }
+ void operator()(std::nullptr_t) { ++count; }
+ void operator()(int*) const { throw "wrong type passed to deleter"; }
+};
+
+void
+test01()
+{
+ bool test __attribute__((unused)) = true;
+
+ std::shared_ptr<int> p = nullptr;
+ VERIFY( p.get() == nullptr );
+ VERIFY( p.use_count() == 0 );
+
+}
+
+void
+test02()
+{
+ bool test __attribute__((unused)) = true;
+
+ deleter d;
+ std::shared_ptr<int> p(nullptr, std::ref(d));
+ VERIFY( p.get() == nullptr );
+ VERIFY( p.use_count() == 1 );
+
+ p = nullptr;
+ VERIFY( p.use_count() == 0 );
+ VERIFY( d.count == 1 );
+}
+
+
+void
+test03()
+{
+ bool test __attribute__((unused)) = true;
+
+ deleter d;
+ __gnu_test::tracker_allocator<int> a;
+ std::shared_ptr<int> p(nullptr, std::ref(d), a);
+ VERIFY( p.get() == nullptr );
+ VERIFY( p.use_count() == 1 );
+
+ p = nullptr;
+ VERIFY( p.use_count() == 0 );
+ VERIFY( d.count == 1 );
+
+ typedef __gnu_test::tracker_allocator_counter c;
+ VERIFY( c::get_destruct_count() == c::get_construct_count() );
+ VERIFY( c::get_deallocation_count() == c::get_allocation_count() );
+}
+
+int
+main()
+{
+ test01();
+ test02();
+ test03();
+ return 0;
+}