libstdc++-v3/testsuite/20_util/allocator_traits/members/destroy.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2011-2024 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 <memory>
  21 #include <new>
  22 #include <testsuite_hooks.h>
  23
  24 struct X
  25 {
  26   static int counter;
  27   ~X() { ++counter; }
  28 };
  29
  30 int X::counter = 0;
  31
  32 template<typename T>
  33 struct allocator_with_destroy
  34 {
  35   typedef T value_type;
  36
  37   allocator_with_destroy() : called() { }
  38
  39   void destroy(T* p) { called = true; }
  40
  41   int called;
  42 };
  43
  44 template<typename T>
  45 struct allocator_without_destroy
  46 {
  47   typedef T value_type;
  48
  49   allocator_without_destroy() : called() { }
  50
  51   int called;
  52 };
  53
  54 void test01()
  55 {
  56   typedef std::allocator_traits<allocator_with_destroy<X>> traits_type;
  57   traits_type::allocator_type a;
  58   X* p = 0;
  59   traits_type::destroy(a, p);
  60   VERIFY( a.called );
  61   VERIFY( X::counter == 0 );
  62 }
  63
  64 void test02()
  65 {
  66   typedef std::allocator_traits<allocator_without_destroy<X>> traits_type;
  67   traits_type::allocator_type a;
  68   char buf[sizeof(X)];
  69   X* p = ::new (static_cast<void*>(buf)) X();
  70   traits_type::destroy(a, p);
  71   VERIFY( !a.called );
  72   VERIFY( X::counter == 1 );
  73 }
  74
  75 int main()
  76 {
  77   test01();
  78   test02();
  79 }