libstdc++-v3/testsuite/23_containers/unordered_set/allocator/ext_ptr.cc

// Copyright (C) 2013-2021 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/>.

// This test fails to compile since C++17 (see xfail-if below) so we can only
// do a "run" test for C++11 and C++14, and a "compile" test for C++17 and up.
// { dg-do run { target { c++11_only || c++14_only } } }
// { dg-do compile { target c++17 } }

#include <unordered_set>
#include <memory>
#include <testsuite_hooks.h>
#include <testsuite_allocator.h>

struct T { int i; };
bool operator==(const T& l, const T& r) { return l.i == r.i; }
struct H { std::size_t operator()(const T& t) const noexcept { return t.i; }
};
struct E : std::equal_to<T> { };

using __gnu_test::CustomPointerAlloc;

// { dg-xfail-if "node reinsertion assumes raw pointers" { c++17 } }
// TODO when removing this xfail change the test back to "dg-do run".
template class std::unordered_set<T, H, E, CustomPointerAlloc<T>>;

void test01()
{
  typedef CustomPointerAlloc<T> alloc_type;
  typedef std::unordered_set<T, H, E, alloc_type> test_type;
  test_type v;
  v.insert(T());
  VERIFY( ++v.begin() == v.end() );
}

int main()
{
  test01();
}