libstdc++-v3/testsuite/18_support/destroying_delete.cc

   1 // Copyright (C) 2019-2020 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-options "-std=gnu++2a" }
  19 // { dg-do run { target c++2a } }
  20
  21 #include <new>
  22 #include <testsuite_hooks.h>
  23
  24 #ifndef __cpp_lib_destroying_delete
  25 # error "Feature-test macro for destroying_delete missing"
  26 #elif __cpp_lib_destroying_delete != 201806L
  27 # error "Feature-test macro for destroying_delete has wrong value"
  28 #endif
  29
  30 const std::destroying_delete_t d{};
  31 static_assert(std::is_same_v<decltype(d), decltype(std::destroying_delete)>);
  32
  33 struct X
  34 {
  35   static bool called;
  36
  37   void operator delete(X* p, std::destroying_delete_t)
  38   {
  39     called = true;
  40     p->~X();
  41     ::operator delete(p);
  42   }
  43 };
  44
  45 bool X::called = false;
  46
  47 void
  48 test01()
  49 {
  50   X* x = new X;
  51   delete x;
  52   VERIFY( X::called );
  53 }
  54
  55 int main()
  56 {
  57   test01();
  58 }