1 files changed, 198 insertions, 0 deletions
diff --git a/test/std/containers/unord/unord.set/unord.set.swap/swap_noexcept.pass.cpp b/test/std/containers/unord/unord.set/unord.set.swap/swap_noexcept.pass.cpp
new file mode 100644
index 000000000000..5d746407a80c
--- /dev/null
+++ b/test/std/containers/unord/unord.set/unord.set.swap/swap_noexcept.pass.cpp
@@ -0,0 +1,198 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <unordered_set>
+
+// void swap(unordered_set& c)
+//      noexcept(
+//          (!allocator_type::propagate_on_container_swap::value ||
+//           __is_nothrow_swappable<allocator_type>::value) &&
+//           __is_nothrow_swappable<hasher>::value &&
+//           __is_nothrow_swappable<key_equal>::value);
+//
+//  In C++17, the standard says that swap shall have:
+//     noexcept(allocator_traits<Allocator>::is_always_equal::value &&
+//               noexcept(swap(declval<Hash&>(), declval<Hash&>())) &&
+//               noexcept(swap(declval<Pred&>(), declval<Pred&>())));
+
+// This tests a conforming extension
+
+#include <unordered_set>
+#include <cassert>
+
+#include "MoveOnly.h"
+#include "test_allocator.h"
+
+template <class T>
+struct some_comp
+{
+    typedef T value_type;
+    
+    some_comp() {}
+    some_comp(const some_comp&) {}
+};
+
+template <class T>
+struct some_comp2
+{
+    typedef T value_type;
+    
+    some_comp2() {}
+    some_comp2(const some_comp2&) {}
+    void deallocate(void*, unsigned) {}
+    typedef std::true_type propagate_on_container_swap;
+};
+
+#if TEST_STD_VER >= 14
+template <typename T>
+void swap(some_comp2<T>&, some_comp2<T>&) noexcept {}
+#endif
+
+template <class T>
+struct some_hash
+{
+    typedef T value_type;
+    some_hash() {}
+    some_hash(const some_hash&);
+};
+
+template <class T>
+struct some_hash2
+{
+    typedef T value_type;
+    some_hash2() {}
+    some_hash2(const some_hash2&);
+};
+
+#if TEST_STD_VER >= 14
+template <typename T>
+void swap(some_hash2<T>&, some_hash2<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()
+{
+#if __has_feature(cxx_noexcept)
+    {
+        typedef std::unordered_set<MoveOnly> C;
+        C c1, c2;
+        static_assert(noexcept(swap(c1, c2)), "");
+    }
+    {
+        typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
+                           std::equal_to<MoveOnly>, test_allocator<MoveOnly>> C;
+        C c1, c2;
+        static_assert(noexcept(swap(c1, c2)), "");
+    }
+    {
+        typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
+                          std::equal_to<MoveOnly>, other_allocator<MoveOnly>> C;
+        C c1, c2;
+        static_assert(noexcept(swap(c1, c2)), "");
+    }
+    {
+        typedef std::unordered_set<MoveOnly, some_hash<MoveOnly>> C;
+        C c1, c2;
+        static_assert(!noexcept(swap(c1, c2)), "");
+    }
+    {
+        typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
+                                                         some_comp<MoveOnly>> C;
+        C c1, c2;
+        static_assert(!noexcept(swap(c1, c2)), "");
+    }
+
+#if TEST_STD_VER >= 14
+    { // POCS allocator, throwable swap for hash, throwable swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash<MoveOnly>, some_comp <MoveOnly>, some_alloc <MoveOnly>> C;
+    C c1, c2;
+    static_assert(!noexcept(swap(c1, c2)), "");
+    }
+    { // always equal allocator, throwable swap for hash, throwable swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash<MoveOnly>, some_comp <MoveOnly>, some_alloc2<MoveOnly>> C;
+    C c1, c2;
+    static_assert(!noexcept(swap(c1, c2)), "");
+    }
+    { // POCS allocator, throwable swap for hash, nothrow swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash<MoveOnly>, some_comp2<MoveOnly>, some_alloc <MoveOnly>> C;
+    C c1, c2;
+    static_assert(!noexcept(swap(c1, c2)), "");
+    }
+    { // always equal allocator, throwable swap for hash, nothrow swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash<MoveOnly>, some_comp2<MoveOnly>, some_alloc2<MoveOnly>> C;
+    C c1, c2;
+    static_assert(!noexcept(swap(c1, c2)), "");
+    }
+    { // POCS allocator, nothrow swap for hash, throwable swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash2<MoveOnly>, some_comp <MoveOnly>, some_alloc <MoveOnly>> C;
+    C c1, c2;
+    static_assert(!noexcept(swap(c1, c2)), "");
+    }
+    { // always equal allocator, nothrow swap for hash, throwable swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash2<MoveOnly>, some_comp <MoveOnly>, some_alloc2<MoveOnly>> C;
+    C c1, c2;
+    static_assert(!noexcept(swap(c1, c2)), "");
+    }
+    { // POCS allocator, nothrow swap for hash, nothrow swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash2<MoveOnly>, some_comp2<MoveOnly>, some_alloc <MoveOnly>> C;
+    C c1, c2;
+    static_assert( noexcept(swap(c1, c2)), "");
+    }
+    { // always equal allocator, nothrow swap for hash, nothrow swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash2<MoveOnly>, some_comp2<MoveOnly>, some_alloc2<MoveOnly>> C;
+    C c1, c2;
+    static_assert( noexcept(swap(c1, c2)), "");
+    }
+
+    { // NOT always equal allocator, nothrow swap for hash, nothrow swap for comp
+    typedef std::unordered_set<MoveOnly, some_hash2<MoveOnly>, some_comp2<MoveOnly>, some_alloc3<MoveOnly>> C;
+    C c1, c2;
+    static_assert( noexcept(swap(c1, c2)), "");
+    }
+#endif
+
+#endif
+}