1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // UNSUPPORTED: c++98, c++03
14 // void swap(vector& c)
15 // noexcept(!allocator_type::propagate_on_container_swap::value ||
16 // __is_nothrow_swappable<allocator_type>::value);
18 // In C++17, the standard says that swap shall have:
19 // noexcept(allocator_traits<Allocator>::propagate_on_container_swap::value ||
20 // allocator_traits<Allocator>::is_always_equal::value);
22 // This tests a conforming extension
28 #include "test_macros.h"
30 #include "test_allocator.h"
38 some_alloc(const some_alloc&);
39 void deallocate(void*, unsigned) {}
41 typedef std::true_type propagate_on_container_swap;
50 some_alloc2(const some_alloc2&);
51 void deallocate(void*, unsigned) {}
53 typedef std::false_type propagate_on_container_swap;
54 typedef std::true_type is_always_equal;
60 typedef std::vector<MoveOnly> C;
61 static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
64 typedef std::vector<MoveOnly, test_allocator<MoveOnly>> C;
65 LIBCPP_STATIC_ASSERT(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
68 typedef std::vector<MoveOnly, other_allocator<MoveOnly>> C;
69 static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
72 typedef std::vector<MoveOnly, some_alloc<MoveOnly>> C;
73 #if TEST_STD_VER >= 14
74 // In c++14, if POCS is set, swapping the allocator is required not to throw
75 static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
77 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
80 #if TEST_STD_VER >= 14
82 typedef std::vector<MoveOnly, some_alloc2<MoveOnly>> C;
83 // if the allocators are always equal, then the swap can be noexcept
84 static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");