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

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2012-2021 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(new A);
  34   std::unique_ptr<volatile A> vA(new A);
  35   std::unique_ptr<const volatile A> cvA(new A);
  36 }
  37
  38 void
  39 test02()
  40 {
  41   std::unique_ptr<const A> cB(new B);
  42   std::unique_ptr<volatile A> vB(new B);
  43   std::unique_ptr<const volatile A> cvB(new B);
  44 }
  45
  46 void
  47 test03()
  48 {
  49   std::unique_ptr<A> upA;
  50
  51   std::unique_ptr<const A> cA(std::move(upA));
  52   std::unique_ptr<volatile A> vA(std::move(upA));
  53   std::unique_ptr<const volatile A> cvA(std::move(upA));
  54 }
  55
  56 void
  57 test04()
  58 {
  59   std::unique_ptr<B> upB;
  60
  61   std::unique_ptr<const A> cA(std::move(upB));
  62   std::unique_ptr<volatile A> vA(std::move(upB));
  63   std::unique_ptr<const volatile A> cvA(std::move(upB));
  64 }
  65
  66 void
  67 test05()
  68 {
  69   std::unique_ptr<const A[]> cA(new A[1]);
  70   std::unique_ptr<volatile A[]> vA(new A[1]);
  71   std::unique_ptr<const volatile A[]> cvA(new A[1]);
  72 }
  73
  74 void
  75 test06()
  76 {
  77   std::unique_ptr<A[]> upA;
  78
  79   std::unique_ptr<const A[]> cA(std::move(upA));
  80   std::unique_ptr<volatile A[]> vA(std::move(upA));
  81   std::unique_ptr<const volatile A[]> cvA(std::move(upA));
  82 }
  83
  84 struct A_pointer { operator A*() const { return nullptr; } };
  85
  86 void
  87 test07()
  88 {
  89   // Allow conversions from user-defined pointer-like types
  90   // for the single-object version
  91   A_pointer p;
  92   std::unique_ptr<A> upA(p);
  93   std::unique_ptr<const A> cA(p);
  94   std::unique_ptr<volatile A> vA(p);
  95   std::unique_ptr<const volatile A> cvA(p);
  96   // Allow conversions from user-defined pointer-like types
  97   // for the array version when the type is converted explicitly
  98   std::unique_ptr<A[]> upA2((A*)p);
  99   std::unique_ptr<const A[]> cA2((A*)p);
 100   std::unique_ptr<volatile A[]> vA2((A*)p);
 101   std::unique_ptr<const volatile A[]> cvA2((A*)p);
 102 }