libstdc++-v3/testsuite/20_util/unique_ptr/modifiers/cv_qual.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2012-2020 Free Software Foundation, Inc.
   4 //
   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)
   9 // any later version.
  10
  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.
  15
  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/>.
  19
  20 // 20.7.1 Class template unique_ptr [unique.ptr]
  21
  22 #include <memory>
  23
  24 struct A { virtual ~A() = default; };
  25
  26 struct B : A { };
  27
  28 // Construction from objects with different cv-qualification
  29
  30 void
  31 test01()
  32 {
  33   std::unique_ptr<const A> cA;
  34   cA.reset(new A);
  35   std::unique_ptr<volatile A> vA;
  36   vA.reset(new A);
  37   std::unique_ptr<const volatile A> cvA;
  38   cvA.reset(new A);
  39 }
  40
  41 void
  42 test02()
  43 {
  44   std::unique_ptr<const A> cB;
  45   cB.reset(new B);
  46   std::unique_ptr<volatile A> vB;
  47   vB.reset(new B);
  48   std::unique_ptr<const volatile A> cvB;
  49   cvB.reset(new B);
  50 }
  51
  52 void
  53 test03()
  54 {
  55   std::unique_ptr<const A[]> cA;
  56   cA.reset(new A[1]);
  57   std::unique_ptr<volatile A[]> vA;
  58   vA.reset(new A[1]);
  59   std::unique_ptr<const volatile A[]> cvA;
  60   cvA.reset(new A[1]);
  61 }
  62
  63 struct A_pointer { operator A*() const { return nullptr; } };
  64
  65 void
  66 test07()
  67 {
  68   A_pointer p;
  69   // Allow conversions from user-defined pointer-like types
  70   // for the single-object version
  71   std::unique_ptr<A> upA;
  72   upA.reset(p);
  73   std::unique_ptr<const A> cA;
  74   cA.reset(p);
  75   std::unique_ptr<volatile A> vA;
  76   vA.reset(p);
  77   std::unique_ptr<const volatile A> cvA;
  78   cvA.reset(p);
  79   // Allow conversions from user-defined pointer-like types
  80   // for the array version when the type is converted explicitly
  81   std::unique_ptr<A[]> upA2;
  82   upA2.reset((A*)p);
  83   std::unique_ptr<const A[]> cA2;
  84   cA2.reset((A*)p);
  85   std::unique_ptr<volatile A[]> vA2;
  86   vA2.reset((A*)p);
  87   std::unique_ptr<const volatile A[]> cvA2;
  88   cvA2.reset((A*)p);
  89 }