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[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 23_containers / map / allocator / noexcept.cc

// Copyright (C) 2013-2024 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/>.

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

#include <map>
#include <testsuite_allocator.h>

struct T { int i; };

bool operator<(T l, T r) { return l.i < r.i; }

using Cmp = std::less<T>;

struct CmpThrow : Cmp { };
void swap(CmpThrow&, CmpThrow&) noexcept(false) { }

struct U { };

using __gnu_test::propagating_allocator;

void test01()
{
  typedef std::allocator<std::pair<const T, U>> alloc_type;
  typedef std::map<T, U, Cmp, alloc_type> test_type;
  test_type v1;
  test_type v2;
  // this is a GNU extension for std::allocator
  static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
}

void test02()
{
  typedef std::allocator<std::pair<const T, U>> alloc_type;
  typedef std::map<T, U, CmpThrow, alloc_type> test_type;
  test_type v1;
  test_type v2;
  static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  static_assert( !noexcept( v1.swap(v2) ), "Swap can throw" );
}

void test03()
{
  typedef propagating_allocator<std::pair<const T, U>, false> alloc_type;
  typedef std::map<T, U, Cmp, alloc_type> test_type;
  test_type v1(alloc_type(1));
  test_type v2(alloc_type(2));
  static_assert( !noexcept( v1 = std::move(v2) ), "Move assign can throw" );
  static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
}

void test04()
{
  typedef propagating_allocator<std::pair<const T, U>, true> alloc_type;
  typedef std::map<T, U, Cmp, alloc_type> test_type;
  test_type v1(alloc_type(1));
  test_type v2(alloc_type(2));
  static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
}