libstdc++-v3/testsuite/23_containers/set/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 <set>
  21 #include <testsuite_allocator.h>
  22
  23 struct X
  24 {
  25   X(int i) noexcept(true) : _i(i) { }
  26   X(const X& x) noexcept(false)
  27   {
  28     if (Throw) throw 0;
  29     _i = x._i;
  30   }
  31
  32   // Move constructor might throw
  33   X(X&& x) noexcept(false)
  34   {
  35     _i = x._i;
  36     x._i = -x._i;
  37   }
  38
  39   // Tracking calls to assignment functions
  40   X& operator=(const X&) { throw 1; }
  41
  42   X& operator=(X&& x) noexcept(false)
  43   {
  44     _i = x._i;
  45     x._i = -x._i;
  46     return *this;
  47   }
  48
  49   bool
  50   operator < (const X& x) const
  51   { return _i < x._i; }
  52
  53   int _i;
  54   static bool Throw;
  55 };
  56
  57 bool X::Throw = false;
  58
  59 void
  60 test01()
  61 {
  62   using A = __gnu_test::propagating_allocator<X, false>;
  63   A a1(1), a2(2);
  64   std::set<X, std::less<X>, A> s1({ X(1) }, a1), s2({ X(2) }, a2);
  65   X::Throw = true;
  66   s1 = std::move(s2);
  67 }
  68
  69 int
  70 main()
  71 {
  72   test01();
  73 }