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

   1 // { dg-options "-std=gnu++11" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2012-2013 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 // 20.7.1 Class template unique_ptr [unique.ptr]
  22
  23 #include <memory>
  24
  25 struct A { virtual ~A() = default; };
  26
  27 struct B : A { };
  28
  29 // Assignment from objects with different cv-qualification
  30
  31 void
  32 test01()
  33 {
  34   std::unique_ptr<A> upA;
  35
  36   std::unique_ptr<const A> cA;
  37   cA = std::move(upA);
  38   std::unique_ptr<volatile A> vA;
  39   vA = std::move(upA);
  40   std::unique_ptr<const volatile A> cvA;
  41   cvA = std::move(upA);
  42 }
  43
  44 void
  45 test02()
  46 {
  47   std::unique_ptr<B> upB;
  48
  49   std::unique_ptr<const A> cA;
  50   cA = std::move(upB);
  51   std::unique_ptr<volatile A> vA;
  52   vA = std::move(upB);
  53   std::unique_ptr<const volatile A> cvA;
  54   cvA = std::move(upB);
  55 }
  56
  57 void
  58 test03()
  59 {
  60   std::unique_ptr<A[]> upA;
  61
  62   std::unique_ptr<const A[]> cA;
  63   cA = std::move(upA);
  64   std::unique_ptr<volatile A[]> vA;
  65   vA = std::move(upA);
  66   std::unique_ptr<const volatile A[]> cvA;
  67   cvA = std::move(upA);
  68 }
  69
  70 struct A_pointer { operator A*() const { return nullptr; } };
  71
  72 template<typename T>
  73 struct deleter
  74 {
  75   deleter() = default;
  76   template<typename U>
  77     deleter(const deleter<U>) { }
  78   typedef T pointer;
  79   void operator()(T) const { }
  80 };
  81
  82 void
  83 test04()
  84 {
  85   // Allow conversions from user-defined pointer-like types
  86   std::unique_ptr<B[], deleter<A_pointer>> p;
  87   std::unique_ptr<A[], deleter<A*>> upA;
  88   upA = std::move(p);
  89 }