libstdc++-v3/testsuite/experimental/optional/cons/77727.cc

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2016-2017 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 #include <experimental/optional>
  21 #include <testsuite_hooks.h>
  22
  23
  24 struct NonTransferable
  25 {
  26   int x;
  27   NonTransferable(int x) : x(x) {}
  28   NonTransferable(NonTransferable&&) = delete;
  29   NonTransferable& operator=(NonTransferable&&) = delete;
  30   operator int() {return x;}
  31 };
  32
  33 int main()
  34 {
  35   std::experimental::optional<int> oi;
  36   std::experimental::optional<NonTransferable> ot(std::move(oi));
  37   VERIFY(!ot);
  38
  39   std::experimental::optional<int> oi2;
  40   std::experimental::optional<NonTransferable> ot2(oi2);
  41   VERIFY(!ot);
  42
  43   std::experimental::optional<int> oi3{42};
  44   std::experimental::optional<NonTransferable> ot3(std::move(oi3));
  45   VERIFY(ot3 && *ot3 == 42);
  46
  47   std::experimental::optional<int> oi4{666};
  48   std::experimental::optional<NonTransferable> ot4(oi4);
  49   VERIFY(ot4 && *ot4 == 666);
  50 }