// { dg-do run { target c++11 } }

// Copyright (C) 2017-2023 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

// 23.2.2.4 list operations [lib.list.ops]

#include <list>
#include <testsuite_hooks.h>

struct ThrowingComparator
{
  ThrowingComparator(unsigned n) : throw_after(n), count(0) { }
  unsigned int throw_after;
  unsigned int count;
  bool operator()(int, int) {
    if (++count >= throw_after) {
      throw 666;
    }
    return false;
  }
};

struct X
{
  X() = default;
  X(int) {}
};

unsigned int throw_after_X = 0;
unsigned int count_X = 0;

bool operator<(const X&, const X&) {
  if (++count_X >= throw_after_X) {
    throw 666;
  }
  return false;
}


int main()
{
  std::list<int> a{1, 2, 3, 4};
  std::list<int> b{5, 6, 7, 8, 9, 10, 11, 12};
  try {
    a.merge(b, ThrowingComparator{4});
  } catch (...) {
  }
  VERIFY(a.size() == std::distance(a.begin(), a.end()) &&
	 b.size() == std::distance(b.begin(), b.end()));
  std::list<X> ax{1, 2, 3, 4};
  std::list<X> bx{5, 6, 7, 8, 9, 10, 11, 12};
  throw_after_X = 4;
  try {
    ax.merge(bx);
  } catch (...) {
  }
  VERIFY(ax.size() == std::distance(ax.begin(), ax.end()) &&
	 bx.size() == std::distance(bx.begin(), bx.end()));
  std::list<int> ay{5, 6, 7, 8, 9, 10, 11, 12};
  try {
    ay.sort(ThrowingComparator{5});
  } catch (...) {
  }
  VERIFY(ay.size() == 8);
  std::list<X> az{5, 6, 7, 8, 9, 10, 11, 12};
  throw_after_X = 5;
  try {
    az.sort();
  } catch (...) {
  }
  VERIFY(az.size() == 8);
}