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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <set>
// void swap(set& c)
// noexcept(!allocator_type::propagate_on_container_swap::value ||
// __is_nothrow_swappable<allocator_type>::value);
//
// In C++17, the standard says that swap shall have:
// noexcept(allocator_traits<Allocator>::is_always_equal::value &&
// noexcept(swap(declval<Compare&>(), declval<Compare&>())));
// This tests a conforming extension
#include <set>
#include <utility>
#include <cassert>
#include "test_macros.h"
#include "MoveOnly.h"
#include "test_allocator.h"
template <class T>
struct some_comp
{
typedef T value_type;
some_comp() {}
some_comp(const some_comp&) {}
bool operator()(const T&, const T&) const { return false; }
};
template <class T>
struct some_comp2
{
typedef T value_type;
some_comp2() {}
some_comp2(const some_comp2&) {}
bool operator()(const T&, const T&) const { return false; }
};
#if TEST_STD_VER >= 14
template <typename T>
void swap(some_comp2<T>&, some_comp2<T>&) noexcept {}
#endif
template <class T>
struct some_alloc
{
typedef T value_type;
some_alloc() {}
some_alloc(const some_alloc&);
void deallocate(void*, unsigned) {}
typedef std::true_type propagate_on_container_swap;
};
template <class T>
struct some_alloc2
{
typedef T value_type;
some_alloc2() {}
some_alloc2(const some_alloc2&);
void deallocate(void*, unsigned) {}
typedef std::false_type propagate_on_container_swap;
typedef std::true_type is_always_equal;
};
template <class T>
struct some_alloc3
{
typedef T value_type;
some_alloc3() {}
some_alloc3(const some_alloc3&);
void deallocate(void*, unsigned) {}
typedef std::false_type propagate_on_container_swap;
typedef std::false_type is_always_equal;
};
int main()
{
{
typedef std::set<MoveOnly> C;
static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#if defined(_LIBCPP_VERSION)
{
typedef std::set<MoveOnly, std::less<MoveOnly>, test_allocator<MoveOnly>> C;
static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
{
typedef std::set<MoveOnly, std::less<MoveOnly>, other_allocator<MoveOnly>> C;
static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#endif // _LIBCPP_VERSION
{
typedef std::set<MoveOnly, some_comp<MoveOnly>> C;
static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#if TEST_STD_VER >= 14
{ // POCS allocator, throwable swap for comp
typedef std::set<MoveOnly, some_comp <MoveOnly>, some_alloc <MoveOnly>> C;
static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
{ // always equal allocator, throwable swap for comp
typedef std::set<MoveOnly, some_comp <MoveOnly>, some_alloc2<MoveOnly>> C;
static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
{ // POCS allocator, nothrow swap for comp
typedef std::set<MoveOnly, some_comp2<MoveOnly>, some_alloc <MoveOnly>> C;
static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
{ // always equal allocator, nothrow swap for comp
typedef std::set<MoveOnly, some_comp2<MoveOnly>, some_alloc2<MoveOnly>> C;
static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#if defined(_LIBCPP_VERSION)
{ // NOT always equal allocator, nothrow swap for comp
typedef std::set<MoveOnly, some_comp2<MoveOnly>, some_alloc3<MoveOnly>> C;
static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#endif // _LIBCPP_VERSION
#endif
}
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