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

   1 // { dg-options "-Wno-deprecated" }
   2 // { dg-add-options using-deprecated }
   3 // { dg-do run { target c++11 } }
   4
   5 // Copyright (C) 2010-2022 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 20.9.11.2 Template class shared_ptr [util.smartptr.shared]
  23
  24 #include <memory>
  25 #include <testsuite_hooks.h>
  26
  27 struct A
  28 {
  29 };
  30
  31 std::unique_ptr<A>
  32 create_unique_ptr()
  33 {
  34   return std::unique_ptr<A>(new A());
  35 }
  36
  37 std::auto_ptr<A>
  38 create_auto_ptr()
  39 {
  40   return std::auto_ptr<A>(new A());
  41 }
  42
  43 void
  44 process(std::shared_ptr<A> a)
  45 {
  46   VERIFY( a.get() != 0 );
  47   VERIFY( a.use_count() == 1 );
  48 }
  49
  50 // 20.9.11.2.1 shared_ptr creation [util.smartptr.shared.const]
  51
  52 // Implicit conversion of auto_ptr to shared_ptr is allowed
  53
  54 void
  55 test01()
  56 {
  57   process(create_auto_ptr());
  58 }
  59
  60 void
  61 test02()
  62 {
  63   std::auto_ptr<A> a = create_auto_ptr();
  64   process(std::move(a));
  65 }
  66
  67 // Implicit conversion of unique_ptr to shared_ptr is allowed
  68
  69 void
  70 test03()
  71 {
  72   process(create_unique_ptr());
  73 }
  74
  75 void
  76 test04()
  77 {
  78   std::unique_ptr<A> a = create_unique_ptr();
  79   process(std::move(a));
  80 }
  81
  82 int
  83 main()
  84 {
  85   test01();
  86   test02();
  87   test03();
  88   test04();
  89   return 0;
  90 }