libstdc++-v3/testsuite/20_util/shared_ptr/creation/dr925.cc

   1 // { dg-options "-Wno-deprecated" }
   2 // { dg-do run { target c++11 } }
   3
   4 // Copyright (C) 2010-2019 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 20.9.11.2 Template class shared_ptr [util.smartptr.shared]
  22
  23 #include <memory>
  24 #include <testsuite_hooks.h>
  25
  26 struct A
  27 {
  28 };
  29
  30 std::unique_ptr<A>
  31 create_unique_ptr()
  32 {
  33   return std::unique_ptr<A>(new A());
  34 }
  35
  36 std::auto_ptr<A>
  37 create_auto_ptr()
  38 {
  39   return std::auto_ptr<A>(new A());
  40 }
  41
  42 void
  43 process(std::shared_ptr<A> a)
  44 {
  45   VERIFY( a.get() != 0 );
  46   VERIFY( a.use_count() == 1 );
  47 }
  48
  49 // 20.9.11.2.1 shared_ptr creation [util.smartptr.shared.const]
  50
  51 // Implicit conversion of auto_ptr to shared_ptr is allowed
  52
  53 void
  54 test01()
  55 {
  56   process(create_auto_ptr());
  57 }
  58
  59 void
  60 test02()
  61 {
  62   std::auto_ptr<A> a = create_auto_ptr();
  63   process(std::move(a));
  64 }
  65
  66 // Implicit conversion of unique_ptr to shared_ptr is allowed
  67
  68 void
  69 test03()
  70 {
  71   process(create_unique_ptr());
  72 }
  73
  74 void
  75 test04()
  76 {
  77   std::unique_ptr<A> a = create_unique_ptr();
  78   process(std::move(a));
  79 }
  80
  81 int
  82 main()
  83 {
  84   test01();
  85   test02();
  86   test03();
  87   test04();
  88   return 0;
  89 }