136 lines
3.1 KiB
C++
136 lines
3.1 KiB
C++
// { dg-options "-std=gnu++11" }
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// Copyright (C) 2008-2015 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// 20.8.13.4 Template class owner_less [util.smartptr.ownerless]
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#include <memory>
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#include <algorithm>
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#include <testsuite_hooks.h>
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struct A { };
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struct B { A a[2]; };
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// 20.8.13.4 Template class owner_less [util.smartptr.ownerless]
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int
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test01()
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{
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bool test __attribute__((unused)) = true;
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// test empty shared_ptrs compare equivalent
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std::owner_less<std::shared_ptr<A>> less;
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std::owner_less<std::weak_ptr<A>> wless;
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std::shared_ptr<A> p1;
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std::shared_ptr<A> p2;
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VERIFY( !less(p1, p2) && !less(p2, p1) );
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std::weak_ptr<A> p3;
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VERIFY( !less(p1, p3) && !less(p3, p1) );
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VERIFY( !wless(p1, p3) && !wless(p3, p1) );
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return 0;
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}
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// Construction from pointer
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int
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test02()
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{
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bool test __attribute__((unused)) = true;
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std::owner_less<std::shared_ptr<A>> less;
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std::owner_less<std::weak_ptr<A>> wless;
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std::shared_ptr<A> empty;
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std::shared_ptr<A> a1(new A);
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VERIFY( less(empty, a1) || less(a1, empty) );
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std::shared_ptr<A> a2(new A);
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VERIFY( less(a1, a2) || less(a2, a1) );
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std::weak_ptr<A> w1(a1);
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VERIFY( !less(a1, w1) && !less(w1, a1) );
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std::weak_ptr<A> w2(a2);
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VERIFY( wless(w1, w2) || wless(w2, w1) );
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a1.reset();
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VERIFY( !less(empty, a1) && !less(a1, empty) );
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VERIFY( less(a1, w1) || less(w1, a1) );
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a2.reset();
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VERIFY( !less(a2, a1) && !less(a1, a2) );
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return 0;
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}
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// aliasing
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int
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test03()
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{
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bool test __attribute__((unused)) = true;
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std::owner_less<std::shared_ptr<A>> less;
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std::owner_less<std::weak_ptr<A>> wless;
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std::shared_ptr<B> b(new B);
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std::shared_ptr<A> a0(b, &b->a[0]);
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std::shared_ptr<A> a1(b, &b->a[1]);
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// values are different but owners are equivalent:
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VERIFY( a0 < a1 && !less(a0, a1) && !less(a1, a0) );
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std::weak_ptr<A> w0(a0);
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std::weak_ptr<A> w1(a1);
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VERIFY( !wless(w0, w1) && !wless(w1, w0) );
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VERIFY( !less(a0, w1) && !less(w1, a0) );
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VERIFY( !wless(w0, a1) && !wless(a1, w0) );
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return 0;
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}
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// strict weak ordering
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int
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test04()
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{
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bool test __attribute__((unused)) = true;
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std::owner_less<std::shared_ptr<A>> less;
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std::shared_ptr<A> a[3];
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a[0].reset(new A);
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a[1].reset(new A);
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a[2].reset(new A);
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std::sort(a, a+3, less);
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VERIFY( !less(a[0], a[0]) );
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VERIFY( less(a[0], a[1]) && !less(a[1], a[0]) );
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VERIFY( less(a[0], a[1]) && less(a[1], a[2]) && less(a[0], a[2]) );
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return 0;
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}
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int
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main()
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{
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test01();
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test02();
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test03();
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test04();
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return 0;
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}
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