libstdc++-v3/testsuite/23_containers/map/92124.cc

   1 // Copyright (C) 2020-2025 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 <map>
  21 #include <testsuite_allocator.h>
  22
  23 struct X
  24 {
  25   X() = default;
  26   X(const X&)
  27   { if (Throw) throw 1; }
  28
  29   // Move constructor might throw
  30   X(X&&) noexcept(false) {}
  31
  32   // Tracking calls to assignment functions
  33   X& operator=(const X&) { throw 1; }
  34
  35   X& operator=(X&&) noexcept(false) { return *this; }
  36
  37   static bool Throw;
  38 };
  39
  40 bool X::Throw = false;
  41
  42 void
  43 test01()
  44 {
  45   using A = __gnu_test::propagating_allocator<std::pair<const int, X>, false>;
  46   A a1(1), a2(2);
  47   std::map<int, X, std::less<int>, A>
  48     m1({ { 1, X() } }, a1),
  49     m2({ { 2, X() } }, a2);
  50   X::Throw = true;
  51   m1 = std::move(m2);
  52 }
  53
  54 int
  55 main()
  56 {
  57   test01();
  58 }