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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/experimental/memory/shared_ptr/cons/alias_ctor.cc
1 // { dg-options "-std=gnu++14" }
3 // Copyright (C) 2015-2016 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3. If not see
18 // <http://www.gnu.org/licenses/>.
20 // 8.2.1 Class template shared_ptr [memory.smartptr.shared]
22 #include <experimental/memory>
23 #include <testsuite_hooks.h>
39 // 8.2.1.1 shared_ptr constructors [memory.smartptr.shared.const]
41 // Aliasing constructors
46 bool test
__attribute__((unused
)) = true;
48 std::experimental::shared_ptr
<A
[5]> a
;
49 std::experimental::shared_ptr
<bool> b1(a
, &test
);
50 VERIFY( b1
.use_count() == 0 );
51 VERIFY( a
.get() == 0 );
52 VERIFY( b1
.get() == &test
);
54 std::experimental::shared_ptr
<bool> b2(b1
);
55 VERIFY( b2
.use_count() == 0 );
56 VERIFY( b1
.get() == b2
.get() );
62 bool test
__attribute__((unused
)) = true;
64 std::experimental::shared_ptr
<A
[5]> a(new A
[5]);
65 std::experimental::shared_ptr
<int> i1(a
, &a
[0].i
);
66 VERIFY( i1
.use_count() == 2 );
68 std::experimental::shared_ptr
<int> i2(i1
);
69 VERIFY( i2
.use_count() == 3 );
70 VERIFY( i2
.get() == &a
[0].i
);
76 bool test
__attribute__((unused
)) = true;
78 std::experimental::shared_ptr
<B
> b(new B
);
79 std::experimental::shared_ptr
<A
> a1(b
, b
.get());
80 std::experimental::shared_ptr
<A
> a2(b
, &b
->a
);
81 VERIFY( a2
.use_count() == 3 );
84 VERIFY( a1
.get() != a2
.get() );
86 std::experimental::shared_ptr
<A
> a3(a1
);
90 VERIFY( a3
.get() == &b
->a
);