libstdc++-v3/testsuite/20_util/shared_ptr/misc/get_deleter.cc

   1 // Copyright (C) 2017-2021 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++11 } }
  19
  20 #include <memory>
  21 #include <testsuite_hooks.h>
  22
  23 struct Del {
  24   template<typename T> void operator()(T* p) const noexcept { delete p; }
  25 };
  26
  27 Del* (*f1)(const std::shared_ptr<int>&) = std::get_deleter<Del, int>;
  28
  29 void
  30 test01()
  31 {
  32   std::shared_ptr<int> p;
  33   VERIFY( std::get_deleter<Del>(p) == nullptr );
  34   p = std::shared_ptr<int>(new int, Del());
  35   VERIFY( std::get_deleter<Del>(p) != nullptr );
  36   p = std::shared_ptr<int>(new int);
  37   VERIFY( std::get_deleter<Del>(p) == nullptr );
  38 }
  39
  40 int
  41 main()
  42 {
  43   test01();
  44 }