libstdc++-v3/testsuite/23_containers/unordered_map/allocator/default_init.cc

   1 // Copyright (C) 2020-2024 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 // { dg-options "-O0" }
  20
  21 #include <unordered_map>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_allocator.h>
  24
  25 #include <cstring>
  26 #include <ext/aligned_buffer.h>
  27
  28 using T = int;
  29
  30 using __gnu_test::default_init_allocator;
  31
  32 void test01()
  33 {
  34   typedef default_init_allocator<std::pair<const T, T>> alloc_type;
  35   typedef std::unordered_map<T, T, std::hash<T>, std::equal_to<T>,
  36                              alloc_type> test_type;
  37
  38   __gnu_cxx::__aligned_buffer<test_type> buf;
  39   std::memset(buf._M_addr(), ~0, sizeof(test_type));
  40
  41   test_type *tmp = ::new(buf._M_addr()) test_type;
  42
  43   VERIFY( tmp->get_allocator().state == 0 );
  44
  45   tmp->~test_type();
  46 }
  47
  48 void test02()
  49 {
  50   typedef default_init_allocator<std::pair<const T, T>> alloc_type;
  51   typedef std::unordered_map<T, T, std::hash<T>, std::equal_to<T>,
  52                              alloc_type> test_type;
  53
  54   __gnu_cxx::__aligned_buffer<test_type> buf;
  55   std::memset(buf._M_addr(), ~0, sizeof(test_type));
  56
  57   test_type *tmp = ::new(buf._M_addr()) test_type();
  58
  59   VERIFY( tmp->get_allocator().state == 0 );
  60
  61   tmp->~test_type();
  62 }
  63
  64 int main()
  65 {
  66   test01();
  67   test02();
  68   return 0;
  69 }