From d4badbbc5a4c63fa9c644d4ae78ec0e38564c8dc Mon Sep 17 00:00:00 2001
From: Marshall Clow <mclow.lists@gmail.com>
Date: Wed, 17 Aug 2016 05:58:40 +0000
Subject: [PATCH] Support allocators with explicit conversion constructors.
 Fixes bug #29000

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@278904 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/map                                   | 28 ++++----
 include/unordered_map                         | 24 +++----
 .../associative/map/map.cons/alloc.pass.cpp   |  8 +++
 .../map/map.cons/compare_alloc.pass.cpp       |  9 +++
 .../map/map.cons/copy_alloc.pass.cpp          | 34 ++++++++++
 .../associative/map/map.cons/default.pass.cpp | 14 ++++
 .../initializer_list_compare_alloc.pass.cpp   | 26 +++++++-
 .../map.cons/iter_iter_comp_alloc.pass.cpp    | 16 +++++
 .../map/map.cons/move_alloc.pass.cpp          | 39 +++++++++++
 .../multimap/multimap.cons/alloc.pass.cpp     |  8 +++
 .../multimap.cons/compare_alloc.pass.cpp      |  9 +++
 .../multimap.cons/copy_alloc.pass.cpp         | 25 ++++++++
 .../multimap/multimap.cons/default.pass.cpp   | 14 ++++
 .../initializer_list_compare_alloc.pass.cpp   | 36 ++++++++++-
 .../iter_iter_comp_alloc.pass.cpp             | 31 +++++++++
 .../multimap.cons/move_alloc.pass.cpp         | 39 +++++++++++
 .../multiset/multiset.cons/default.pass.cpp   | 14 ++++
 .../associative/set/set.cons/default.pass.cpp | 14 ++++
 .../sequences/deque/deque.cons/alloc.pass.cpp |  2 +
 .../forwardlist.cons/alloc.pass.cpp           |  8 +++
 .../sequences/list/list.cons/default.pass.cpp | 10 +++
 .../vector.bool/construct_default.pass.cpp    |  4 ++
 .../vector.cons/construct_default.pass.cpp    | 12 ++++
 .../unord.map.cnstr/allocator.pass.cpp        | 20 +++++-
 .../unord.map.cnstr/copy_alloc.pass.cpp       | 39 +++++++++++
 .../unord.map.cnstr/default.pass.cpp          | 33 ++++++++++
 .../init_size_hash_equal_allocator.pass.cpp   | 36 +++++++++++
 .../unord.map.cnstr/move_alloc.pass.cpp       | 41 ++++++++++++
 .../range_size_hash_equal_allocator.pass.cpp  | 38 +++++++++++
 .../size_hash_equal_allocator.pass.cpp        | 22 +++++++
 .../unord.multimap.cnstr/allocator.pass.cpp   | 18 ++++++
 .../unord.multimap.cnstr/copy_alloc.pass.cpp  | 53 +++++++++++++++
 .../unord.multimap.cnstr/default.pass.cpp     | 33 ++++++++++
 .../init_size_hash_equal_allocator.pass.cpp   | 59 +++++++++++++++++
 .../unord.multimap.cnstr/move_alloc.pass.cpp  | 64 +++++++++++++++++++
 .../range_size_hash_equal_allocator.pass.cpp  | 61 ++++++++++++++++++
 .../size_hash_equal_allocator.pass.cpp        | 22 +++++++
 .../unord.multiset.cnstr/default.pass.cpp     | 33 ++++++++++
 .../unord.set.cnstr/default.pass.cpp          | 33 ++++++++++
 .../basic.string/string.cons/alloc.pass.cpp   |  1 +
 test/support/min_allocator.h                  | 25 ++++++++
 41 files changed, 1026 insertions(+), 29 deletions(-)

diff --git a/include/map b/include/map
index b8aa7a6d7..bdde949bc 100644
--- a/include/map
+++ b/include/map
@@ -873,7 +873,7 @@ public:
 
     _LIBCPP_INLINE_VISIBILITY
     explicit map(const key_compare& __comp, const allocator_type& __a)
-        : __tree_(__vc(__comp), __a) {}
+        : __tree_(__vc(__comp), typename __base::allocator_type(__a)) {}
 
     template <class _InputIterator>
     _LIBCPP_INLINE_VISIBILITY
@@ -888,7 +888,7 @@ public:
     _LIBCPP_INLINE_VISIBILITY
         map(_InputIterator __f, _InputIterator __l,
             const key_compare& __comp, const allocator_type& __a)
-        : __tree_(__vc(__comp), __a)
+        : __tree_(__vc(__comp), typename __base::allocator_type(__a))
         {
             insert(__f, __l);
         }
@@ -955,7 +955,7 @@ public:
 
     _LIBCPP_INLINE_VISIBILITY
     map(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
-        : __tree_(__vc(__comp), __a)
+        : __tree_(__vc(__comp), typename __base::allocator_type(__a))
         {
             insert(__il.begin(), __il.end());
         }
@@ -977,13 +977,13 @@ public:
 
     _LIBCPP_INLINE_VISIBILITY
     explicit map(const allocator_type& __a)
-        : __tree_(__a)
+        : __tree_(typename __base::allocator_type(__a))
         {
         }
 
     _LIBCPP_INLINE_VISIBILITY
     map(const map& __m, const allocator_type& __a)
-        : __tree_(__m.__tree_.value_comp(), __a)
+        : __tree_(__m.__tree_.value_comp(), typename __base::allocator_type(__a))
         {
             insert(__m.begin(), __m.end());
         }
@@ -1034,7 +1034,7 @@ public:
     const mapped_type& at(const key_type& __k) const;
 
     _LIBCPP_INLINE_VISIBILITY
-    allocator_type get_allocator() const _NOEXCEPT {return __tree_.__alloc();}
+    allocator_type get_allocator() const _NOEXCEPT {return allocator_type(__tree_.__alloc());}
     _LIBCPP_INLINE_VISIBILITY
     key_compare    key_comp()      const {return __tree_.value_comp().key_comp();}
     _LIBCPP_INLINE_VISIBILITY
@@ -1367,7 +1367,7 @@ map<_Key, _Tp, _Compare, _Allocator>::__find_equal_key(__node_base_pointer& __pa
 
 template <class _Key, class _Tp, class _Compare, class _Allocator>
 map<_Key, _Tp, _Compare, _Allocator>::map(map&& __m, const allocator_type& __a)
-    : __tree_(_VSTD::move(__m.__tree_), __a)
+    : __tree_(_VSTD::move(__m.__tree_), typename __base::allocator_type(__a))
 {
     if (__a != __m.get_allocator())
     {
@@ -1599,7 +1599,7 @@ public:
 
     _LIBCPP_INLINE_VISIBILITY
     explicit multimap(const key_compare& __comp, const allocator_type& __a)
-        : __tree_(__vc(__comp), __a) {}
+        : __tree_(__vc(__comp), typename __base::allocator_type(__a)) {}
 
     template <class _InputIterator>
         _LIBCPP_INLINE_VISIBILITY
@@ -1614,7 +1614,7 @@ public:
         _LIBCPP_INLINE_VISIBILITY
         multimap(_InputIterator __f, _InputIterator __l,
             const key_compare& __comp, const allocator_type& __a)
-        : __tree_(__vc(__comp), __a)
+        : __tree_(__vc(__comp), typename __base::allocator_type(__a))
         {
             insert(__f, __l);
         }
@@ -1682,7 +1682,7 @@ public:
 
     _LIBCPP_INLINE_VISIBILITY
     multimap(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
-        : __tree_(__vc(__comp), __a)
+        : __tree_(__vc(__comp), typename __base::allocator_type(__a))
         {
             insert(__il.begin(), __il.end());
         }
@@ -1704,13 +1704,13 @@ public:
 
     _LIBCPP_INLINE_VISIBILITY
     explicit multimap(const allocator_type& __a)
-        : __tree_(__a)
+        : __tree_(typename __base::allocator_type(__a))
         {
         }
 
     _LIBCPP_INLINE_VISIBILITY
     multimap(const multimap& __m, const allocator_type& __a)
-        : __tree_(__m.__tree_.value_comp(), __a)
+        : __tree_(__m.__tree_.value_comp(), typename __base::allocator_type(__a))
         {
             insert(__m.begin(), __m.end());
         }
@@ -1752,7 +1752,7 @@ public:
     size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
 
     _LIBCPP_INLINE_VISIBILITY
-    allocator_type get_allocator() const _NOEXCEPT {return __tree_.__alloc();}
+    allocator_type get_allocator() const _NOEXCEPT {return allocator_type(__tree_.__alloc());}
     _LIBCPP_INLINE_VISIBILITY
     key_compare    key_comp() const {return __tree_.value_comp().key_comp();}
     _LIBCPP_INLINE_VISIBILITY
@@ -1923,7 +1923,7 @@ private:
 #ifndef _LIBCPP_CXX03_LANG
 template <class _Key, class _Tp, class _Compare, class _Allocator>
 multimap<_Key, _Tp, _Compare, _Allocator>::multimap(multimap&& __m, const allocator_type& __a)
-    : __tree_(_VSTD::move(__m.__tree_), __a)
+    : __tree_(_VSTD::move(__m.__tree_), typename __base::allocator_type(__a))
 {
     if (__a != __m.get_allocator())
     {
diff --git a/include/unordered_map b/include/unordered_map
index bf64ad66f..8d7edaf50 100644
--- a/include/unordered_map
+++ b/include/unordered_map
@@ -1185,7 +1185,7 @@ template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
         size_type __n, const hasher& __hf, const key_equal& __eql,
         const allocator_type& __a)
-    : __table_(__hf, __eql, __a)
+    : __table_(__hf, __eql, typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1197,7 +1197,7 @@ template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 inline
 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
         const allocator_type& __a)
-    : __table_(__a)
+    : __table_(typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1234,7 +1234,7 @@ template <class _InputIterator>
 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
         _InputIterator __first, _InputIterator __last, size_type __n,
         const hasher& __hf, const key_equal& __eql, const allocator_type& __a)
-    : __table_(__hf, __eql, __a)
+    : __table_(__hf, __eql, typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1258,7 +1258,7 @@ unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
 template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
         const unordered_map& __u, const allocator_type& __a)
-    : __table_(__u.__table_, __a)
+    : __table_(__u.__table_, typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1285,7 +1285,7 @@ unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
 template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
         unordered_map&& __u, const allocator_type& __a)
-    : __table_(_VSTD::move(__u.__table_), __a)
+    : __table_(_VSTD::move(__u.__table_), typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1335,7 +1335,7 @@ template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
         initializer_list<value_type> __il, size_type __n, const hasher& __hf,
         const key_equal& __eql, const allocator_type& __a)
-    : __table_(__hf, __eql, __a)
+    : __table_(__hf, __eql, typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1820,7 +1820,7 @@ template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
         size_type __n, const hasher& __hf, const key_equal& __eql,
         const allocator_type& __a)
-    : __table_(__hf, __eql, __a)
+    : __table_(__hf, __eql, typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1858,7 +1858,7 @@ template <class _InputIterator>
 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
         _InputIterator __first, _InputIterator __last, size_type __n,
         const hasher& __hf, const key_equal& __eql, const allocator_type& __a)
-    : __table_(__hf, __eql, __a)
+    : __table_(__hf, __eql, typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1871,7 +1871,7 @@ template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 inline
 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
         const allocator_type& __a)
-    : __table_(__a)
+    : __table_(typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1893,7 +1893,7 @@ unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
 template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
         const unordered_multimap& __u, const allocator_type& __a)
-    : __table_(__u.__table_, __a)
+    : __table_(__u.__table_, typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1920,7 +1920,7 @@ unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
 template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
         unordered_multimap&& __u, const allocator_type& __a)
-    : __table_(_VSTD::move(__u.__table_), __a)
+    : __table_(_VSTD::move(__u.__table_), typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
@@ -1972,7 +1972,7 @@ template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
         initializer_list<value_type> __il, size_type __n, const hasher& __hf,
         const key_equal& __eql, const allocator_type& __a)
-    : __table_(__hf, __eql, __a)
+    : __table_(__hf, __eql, typename __table::allocator_type(__a))
 {
 #if _LIBCPP_DEBUG_LEVEL >= 2
     __get_db()->__insert_c(this);
diff --git a/test/std/containers/associative/map/map.cons/alloc.pass.cpp b/test/std/containers/associative/map/map.cons/alloc.pass.cpp
index 6ff102e68..b1c60e0f5 100644
--- a/test/std/containers/associative/map/map.cons/alloc.pass.cpp
+++ b/test/std/containers/associative/map/map.cons/alloc.pass.cpp
@@ -38,5 +38,13 @@ int main()
     assert(m.begin() == m.end());
     assert(m.get_allocator() == A());
     }
+    {
+    typedef std::less<int> C;
+    typedef explicit_allocator<std::pair<const int, double> > A;
+    std::map<int, double, C, A> m(A{});
+    assert(m.empty());
+    assert(m.begin() == m.end());
+    assert(m.get_allocator() == A());
+    }
 #endif
 }
diff --git a/test/std/containers/associative/map/map.cons/compare_alloc.pass.cpp b/test/std/containers/associative/map/map.cons/compare_alloc.pass.cpp
index ea1374a53..1325f4782 100644
--- a/test/std/containers/associative/map/map.cons/compare_alloc.pass.cpp
+++ b/test/std/containers/associative/map/map.cons/compare_alloc.pass.cpp
@@ -41,5 +41,14 @@ int main()
     assert(m.key_comp() == C(4));
     assert(m.get_allocator() == A());
     }
+    {
+    typedef test_compare<std::less<int> > C;
+    typedef explicit_allocator<std::pair<const int, double> > A;
+    std::map<int, double, C, A> m(C(4), A{});
+    assert(m.empty());
+    assert(m.begin() == m.end());
+    assert(m.key_comp() == C(4));
+    assert(m.get_allocator() == A{});
+    }
 #endif
 }
diff --git a/test/std/containers/associative/map/map.cons/copy_alloc.pass.cpp b/test/std/containers/associative/map/map.cons/copy_alloc.pass.cpp
index 8a9f7c86a..8391ebab0 100644
--- a/test/std/containers/associative/map/map.cons/copy_alloc.pass.cpp
+++ b/test/std/containers/associative/map/map.cons/copy_alloc.pass.cpp
@@ -83,6 +83,40 @@ int main()
     assert(*next(m.begin()) == V(2, 1));
     assert(*next(m.begin(), 2) == V(3, 1));
 
+    assert(mo.get_allocator() == A());
+    assert(mo.key_comp() == C(5));
+    assert(mo.size() == 3);
+    assert(distance(mo.begin(), mo.end()) == 3);
+    assert(*mo.begin() == V(1, 1));
+    assert(*next(mo.begin()) == V(2, 1));
+    assert(*next(mo.begin(), 2) == V(3, 1));
+    }
+    {
+    typedef std::pair<const int, double> V;
+    V ar[] =
+    {
+        V(1, 1),
+        V(1, 1.5),
+        V(1, 2),
+        V(2, 1),
+        V(2, 1.5),
+        V(2, 2),
+        V(3, 1),
+        V(3, 1.5),
+        V(3, 2),
+    };
+    typedef test_compare<std::less<int> > C;
+    typedef explicit_allocator<V> A;
+    std::map<int, double, C, A> mo(ar, ar+sizeof(ar)/sizeof(ar[0]), C(5), A{});
+    std::map<int, double, C, A> m(mo, A{});
+    assert(m.get_allocator() == A());
+    assert(m.key_comp() == C(5));
+    assert(m.size() == 3);
+    assert(distance(m.begin(), m.end()) == 3);
+    assert(*m.begin() == V(1, 1));
+    assert(*next(m.begin()) == V(2, 1));
+    assert(*next(m.begin(), 2) == V(3, 1));
+
     assert(mo.get_allocator() == A());
     assert(mo.key_comp() == C(5));
     assert(mo.size() == 3);
diff --git a/test/std/containers/associative/map/map.cons/default.pass.cpp b/test/std/containers/associative/map/map.cons/default.pass.cpp
index 265c59ef2..29cd4b4ff 100644
--- a/test/std/containers/associative/map/map.cons/default.pass.cpp
+++ b/test/std/containers/associative/map/map.cons/default.pass.cpp
@@ -32,6 +32,20 @@ int main()
     assert(m.begin() == m.end());
     }
     {
+    typedef explicit_allocator<std::pair<const int, double>> A;
+        {
+        std::map<int, double, std::less<int>, A> m;
+        assert(m.empty());
+        assert(m.begin() == m.end());
+        }
+        {
+        A a;
+        std::map<int, double, std::less<int>, A> m(a);
+        assert(m.empty());
+        assert(m.begin() == m.end());
+        }
+    }
+    {
     std::map<int, double> m = {};
     assert(m.empty());
     assert(m.begin() == m.end());
diff --git a/test/std/containers/associative/map/map.cons/initializer_list_compare_alloc.pass.cpp b/test/std/containers/associative/map/map.cons/initializer_list_compare_alloc.pass.cpp
index 1210fe0e4..d7552b360 100644
--- a/test/std/containers/associative/map/map.cons/initializer_list_compare_alloc.pass.cpp
+++ b/test/std/containers/associative/map/map.cons/initializer_list_compare_alloc.pass.cpp
@@ -69,7 +69,7 @@ int main()
     assert(m.key_comp() == C(3));
     assert(m.get_allocator() == A());
     }
-#if _LIBCPP_STD_VER > 11
+#if TEST_STD_VER > 11
     {
     typedef std::pair<const int, double> V;
     typedef min_allocator<V> A;
@@ -95,6 +95,30 @@ int main()
     assert(m.get_allocator() == a);
     }
 #endif
+    {
+    typedef std::pair<const int, double> V;
+    typedef explicit_allocator<V> A;
+    typedef test_compare<std::less<int> > C;
+    A a;
+    std::map<int, double, C, A> m({
+                                   {1, 1},
+                                   {1, 1.5},
+                                   {1, 2},
+                                   {2, 1},
+                                   {2, 1.5},
+                                   {2, 2},
+                                   {3, 1},
+                                   {3, 1.5},
+                                   {3, 2}
+                                  }, C(3), a);
+    assert(m.size() == 3);
+    assert(distance(m.begin(), m.end()) == 3);
+    assert(*m.begin() == V(1, 1));
+    assert(*next(m.begin()) == V(2, 1));
+    assert(*next(m.begin(), 2) == V(3, 1));
+    assert(m.key_comp() == C(3));
+    assert(m.get_allocator() == a);
+    }
 #endif
 #endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 }
diff --git a/test/std/containers/associative/map/map.cons/iter_iter_comp_alloc.pass.cpp b/test/std/containers/associative/map/map.cons/iter_iter_comp_alloc.pass.cpp
index 42376e268..6bad75d66 100644
--- a/test/std/containers/associative/map/map.cons/iter_iter_comp_alloc.pass.cpp
+++ b/test/std/containers/associative/map/map.cons/iter_iter_comp_alloc.pass.cpp
@@ -90,6 +90,7 @@ int main()
         V(3, 1.5),
         V(3, 2),
     };
+    {
     typedef std::pair<const int, double> V;
     typedef min_allocator<V> A;
     typedef test_compare<std::less<int> > C;
@@ -103,6 +104,21 @@ int main()
     assert(*next(m.begin(), 2) == V(3, 1));
     assert(m.get_allocator() == a);
     }
+    {
+    typedef std::pair<const int, double> V;
+    typedef explicit_allocator<V> A;
+    typedef test_compare<std::less<int> > C;
+    A a;
+    std::map<int, double, C, A> m(ar, ar+sizeof(ar)/sizeof(ar[0]), a );
+
+    assert(m.size() == 3);
+    assert(distance(m.begin(), m.end()) == 3);
+    assert(*m.begin() == V(1, 1));
+    assert(*next(m.begin()) == V(2, 1));
+    assert(*next(m.begin(), 2) == V(3, 1));
+    assert(m.get_allocator() == a);
+    }
+    }
 #endif
 #endif
 }
diff --git a/test/std/containers/associative/map/map.cons/move_alloc.pass.cpp b/test/std/containers/associative/map/map.cons/move_alloc.pass.cpp
index 4ccf56118..8349f13fd 100644
--- a/test/std/containers/associative/map/map.cons/move_alloc.pass.cpp
+++ b/test/std/containers/associative/map/map.cons/move_alloc.pass.cpp
@@ -229,6 +229,45 @@ int main()
         assert(m3.key_comp() == C(5));
         assert(m1.empty());
     }
+    {
+        typedef std::pair<MoveOnly, MoveOnly> V;
+        typedef std::pair<const MoveOnly, MoveOnly> VC;
+        typedef test_compare<std::less<MoveOnly> > C;
+        typedef explicit_allocator<VC> A;
+        typedef std::map<MoveOnly, MoveOnly, C, A> M;
+        typedef std::move_iterator<V*> I;
+        V a1[] =
+        {
+            V(1, 1),
+            V(1, 2),
+            V(1, 3),
+            V(2, 1),
+            V(2, 2),
+            V(2, 3),
+            V(3, 1),
+            V(3, 2),
+            V(3, 3)
+        };
+        M m1(I(a1), I(a1+sizeof(a1)/sizeof(a1[0])), C(5), A{});
+        V a2[] =
+        {
+            V(1, 1),
+            V(1, 2),
+            V(1, 3),
+            V(2, 1),
+            V(2, 2),
+            V(2, 3),
+            V(3, 1),
+            V(3, 2),
+            V(3, 3)
+        };
+        M m2(I(a2), I(a2+sizeof(a2)/sizeof(a2[0])), C(5), A{});
+        M m3(std::move(m1), A{});
+        assert(m3 == m2);
+        assert(m3.get_allocator() == A{});
+        assert(m3.key_comp() == C(5));
+        assert(m1.empty());
+    }
 #endif
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/containers/associative/multimap/multimap.cons/alloc.pass.cpp b/test/std/containers/associative/multimap/multimap.cons/alloc.pass.cpp
index 69660fcd2..40930f0c9 100644
--- a/test/std/containers/associative/multimap/multimap.cons/alloc.pass.cpp
+++ b/test/std/containers/associative/multimap/multimap.cons/alloc.pass.cpp
@@ -38,5 +38,13 @@ int main()
     assert(m.begin() == m.end());
     assert(m.get_allocator() == A());
     }
+    {
+    typedef std::less<int> C;
+    typedef explicit_allocator<std::pair<const int, double> > A;
+    std::multimap<int, double, C, A> m(A{});
+    assert(m.empty());
+    assert(m.begin() == m.end());
+    assert(m.get_allocator() == A{});
+    }
 #endif
 }
diff --git a/test/std/containers/associative/multimap/multimap.cons/compare_alloc.pass.cpp b/test/std/containers/associative/multimap/multimap.cons/compare_alloc.pass.cpp
index 836532892..fc6cef89f 100644
--- a/test/std/containers/associative/multimap/multimap.cons/compare_alloc.pass.cpp
+++ b/test/std/containers/associative/multimap/multimap.cons/compare_alloc.pass.cpp
@@ -41,5 +41,14 @@ int main()
     assert(m.key_comp() == C(4));
     assert(m.get_allocator() == A());
     }
+    {
+    typedef test_compare<std::less<int> > C;
+    typedef explicit_allocator<std::pair<const int, double> > A;
+    std::multimap<int, double, C, A> m(C(4), A{});
+    assert(m.empty());
+    assert(m.begin() == m.end());
+    assert(m.key_comp() == C(4));
+    assert(m.get_allocator() == A{});
+    }
 #endif
 }
diff --git a/test/std/containers/associative/multimap/multimap.cons/copy_alloc.pass.cpp b/test/std/containers/associative/multimap/multimap.cons/copy_alloc.pass.cpp
index 46b9459ca..cccebfb54 100644
--- a/test/std/containers/associative/multimap/multimap.cons/copy_alloc.pass.cpp
+++ b/test/std/containers/associative/multimap/multimap.cons/copy_alloc.pass.cpp
@@ -73,5 +73,30 @@ int main()
     assert(mo.get_allocator() == A());
     assert(mo.key_comp() == C(5));
     }
+    {
+    typedef std::pair<const int, double> V;
+    V ar[] =
+    {
+        V(1, 1),
+        V(1, 1.5),
+        V(1, 2),
+        V(2, 1),
+        V(2, 1.5),
+        V(2, 2),
+        V(3, 1),
+        V(3, 1.5),
+        V(3, 2),
+    };
+    typedef test_compare<std::less<int> > C;
+    typedef explicit_allocator<V> A;
+    std::multimap<int, double, C, A> mo(ar, ar+sizeof(ar)/sizeof(ar[0]), C(5), A{});
+    std::multimap<int, double, C, A> m(mo, A{});
+    assert(m == mo);
+    assert(m.get_allocator() == A{});
+    assert(m.key_comp() == C(5));
+
+    assert(mo.get_allocator() == A{});
+    assert(mo.key_comp() == C(5));
+    }
 #endif
 }
diff --git a/test/std/containers/associative/multimap/multimap.cons/default.pass.cpp b/test/std/containers/associative/multimap/multimap.cons/default.pass.cpp
index d39cc1d0e..af1b22bc9 100644
--- a/test/std/containers/associative/multimap/multimap.cons/default.pass.cpp
+++ b/test/std/containers/associative/multimap/multimap.cons/default.pass.cpp
@@ -32,6 +32,20 @@ int main()
     assert(m.begin() == m.end());
     }
     {
+    typedef explicit_allocator<std::pair<const int, double>> A;
+        {
+        std::multimap<int, double, std::less<int>, A> m;
+        assert(m.empty());
+        assert(m.begin() == m.end());
+        }
+        {
+        A a;
+        std::multimap<int, double, std::less<int>, A> m(a);
+        assert(m.empty());
+        assert(m.begin() == m.end());
+        }
+    }
+    {
     std::multimap<int, double> m = {};
     assert(m.empty());
     assert(m.begin() == m.end());
diff --git a/test/std/containers/associative/multimap/multimap.cons/initializer_list_compare_alloc.pass.cpp b/test/std/containers/associative/multimap/multimap.cons/initializer_list_compare_alloc.pass.cpp
index f5d3463ae..8d12a059b 100644
--- a/test/std/containers/associative/multimap/multimap.cons/initializer_list_compare_alloc.pass.cpp
+++ b/test/std/containers/associative/multimap/multimap.cons/initializer_list_compare_alloc.pass.cpp
@@ -92,7 +92,7 @@ int main()
     assert(m.key_comp() == Cmp(4));
     assert(m.get_allocator() == A());
     }
-#if _LIBCPP_STD_VER > 11
+#if TEST_STD_VER > 11
     {
     typedef test_compare<std::less<int> > C;
     typedef std::pair<const int, double> V;
@@ -125,5 +125,39 @@ int main()
     assert(m.get_allocator() == a);
     }
 #endif
+    {
+    typedef test_compare<std::less<int> > Cmp;
+    typedef explicit_allocator<std::pair<const int, double> > A;
+    typedef std::multimap<int, double, Cmp, A> C;
+    typedef C::value_type V;
+    C m(
+           {
+               {1, 1},
+               {1, 1.5},
+               {1, 2},
+               {2, 1},
+               {2, 1.5},
+               {2, 2},
+               {3, 1},
+               {3, 1.5},
+               {3, 2}
+           },
+           Cmp(4), A{}
+        );
+    assert(m.size() == 9);
+    assert(distance(m.begin(), m.end()) == 9);
+    C::const_iterator i = m.cbegin();
+    assert(*i == V(1, 1));
+    assert(*++i == V(1, 1.5));
+    assert(*++i == V(1, 2));
+    assert(*++i == V(2, 1));
+    assert(*++i == V(2, 1.5));
+    assert(*++i == V(2, 2));
+    assert(*++i == V(3, 1));
+    assert(*++i == V(3, 1.5));
+    assert(*++i == V(3, 2));
+    assert(m.key_comp() == Cmp(4));
+    assert(m.get_allocator() == A{});
+    }
 #endif
 }
diff --git a/test/std/containers/associative/multimap/multimap.cons/iter_iter_comp_alloc.pass.cpp b/test/std/containers/associative/multimap/multimap.cons/iter_iter_comp_alloc.pass.cpp
index 31bf72dac..b0e70c444 100644
--- a/test/std/containers/associative/multimap/multimap.cons/iter_iter_comp_alloc.pass.cpp
+++ b/test/std/containers/associative/multimap/multimap.cons/iter_iter_comp_alloc.pass.cpp
@@ -87,5 +87,36 @@ int main()
     assert(*next(m.begin(), 7) == V(3, 1.5));
     assert(*next(m.begin(), 8) == V(3, 2));
     }
+    {
+    typedef std::pair<const int, double> V;
+    V ar[] =
+    {
+        V(1, 1),
+        V(1, 1.5),
+        V(1, 2),
+        V(2, 1),
+        V(2, 1.5),
+        V(2, 2),
+        V(3, 1),
+        V(3, 1.5),
+        V(3, 2),
+    };
+    typedef test_compare<std::less<int> > C;
+    typedef explicit_allocator<V> A;
+    std::multimap<int, double, C, A> m(ar, ar+sizeof(ar)/sizeof(ar[0]), C(5), A{});
+    assert(m.get_allocator() == A{});
+    assert(m.key_comp() == C(5));
+    assert(m.size() == 9);
+    assert(distance(m.begin(), m.end()) == 9);
+    assert(*m.begin() == V(1, 1));
+    assert(*next(m.begin()) == V(1, 1.5));
+    assert(*next(m.begin(), 2) == V(1, 2));
+    assert(*next(m.begin(), 3) == V(2, 1));
+    assert(*next(m.begin(), 4) == V(2, 1.5));
+    assert(*next(m.begin(), 5) == V(2, 2));
+    assert(*next(m.begin(), 6) == V(3, 1));
+    assert(*next(m.begin(), 7) == V(3, 1.5));
+    assert(*next(m.begin(), 8) == V(3, 2));
+    }
 #endif
 }
diff --git a/test/std/containers/associative/multimap/multimap.cons/move_alloc.pass.cpp b/test/std/containers/associative/multimap/multimap.cons/move_alloc.pass.cpp
index 41771f62a..6ce7127ea 100644
--- a/test/std/containers/associative/multimap/multimap.cons/move_alloc.pass.cpp
+++ b/test/std/containers/associative/multimap/multimap.cons/move_alloc.pass.cpp
@@ -229,6 +229,45 @@ int main()
         assert(m3.key_comp() == C(5));
         assert(m1.empty());
     }
+    {
+        typedef std::pair<MoveOnly, MoveOnly> V;
+        typedef std::pair<const MoveOnly, MoveOnly> VC;
+        typedef test_compare<std::less<MoveOnly> > C;
+        typedef explicit_allocator<VC> A;
+        typedef std::multimap<MoveOnly, MoveOnly, C, A> M;
+        typedef std::move_iterator<V*> I;
+        V a1[] =
+        {
+            V(1, 1),
+            V(1, 2),
+            V(1, 3),
+            V(2, 1),
+            V(2, 2),
+            V(2, 3),
+            V(3, 1),
+            V(3, 2),
+            V(3, 3)
+        };
+        M m1(I(a1), I(a1+sizeof(a1)/sizeof(a1[0])), C(5), A{});
+        V a2[] =
+        {
+            V(1, 1),
+            V(1, 2),
+            V(1, 3),
+            V(2, 1),
+            V(2, 2),
+            V(2, 3),
+            V(3, 1),
+            V(3, 2),
+            V(3, 3)
+        };
+        M m2(I(a2), I(a2+sizeof(a2)/sizeof(a2[0])), C(5), A{});
+        M m3(std::move(m1), A{});
+        assert(m3 == m2);
+        assert(m3.get_allocator() == A{});
+        assert(m3.key_comp() == C(5));
+        assert(m1.empty());
+    }
 #endif
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/containers/associative/multiset/multiset.cons/default.pass.cpp b/test/std/containers/associative/multiset/multiset.cons/default.pass.cpp
index 0bc50ab7a..b5e063e94 100644
--- a/test/std/containers/associative/multiset/multiset.cons/default.pass.cpp
+++ b/test/std/containers/associative/multiset/multiset.cons/default.pass.cpp
@@ -32,6 +32,20 @@ int main()
     assert(m.begin() == m.end());
     }
     {
+    typedef explicit_allocator<int> A;
+        {
+        std::multiset<int, std::less<int>, A> m;
+        assert(m.empty());
+        assert(m.begin() == m.end());
+        }
+        {
+        A a;
+        std::multiset<int, std::less<int>, A> m(a);
+        assert(m.empty());
+        assert(m.begin() == m.end());
+        }
+    }
+    {
     std::multiset<int> m = {};
     assert(m.empty());
     assert(m.begin() == m.end());
diff --git a/test/std/containers/associative/set/set.cons/default.pass.cpp b/test/std/containers/associative/set/set.cons/default.pass.cpp
index 4c924ca70..3310c51ed 100644
--- a/test/std/containers/associative/set/set.cons/default.pass.cpp
+++ b/test/std/containers/associative/set/set.cons/default.pass.cpp
@@ -32,6 +32,20 @@ int main()
     assert(m.begin() == m.end());
     }
     {
+    typedef explicit_allocator<int> A;
+        {
+        std::set<int, std::less<int>, A> m;
+        assert(m.empty());
+        assert(m.begin() == m.end());
+        }
+        {
+        A a;
+        std::set<int, std::less<int>, A> m(a);
+        assert(m.empty());
+        assert(m.begin() == m.end());
+        }
+    }
+    {
     std::set<int> m = {};
     assert(m.empty());
     assert(m.begin() == m.end());
diff --git a/test/std/containers/sequences/deque/deque.cons/alloc.pass.cpp b/test/std/containers/sequences/deque/deque.cons/alloc.pass.cpp
index 787c2394b..bd7db2651 100644
--- a/test/std/containers/sequences/deque/deque.cons/alloc.pass.cpp
+++ b/test/std/containers/sequences/deque/deque.cons/alloc.pass.cpp
@@ -34,5 +34,7 @@ int main()
 #if TEST_STD_VER >= 11
     test<int>(min_allocator<int>());
     test<NotConstructible>(min_allocator<NotConstructible>{});
+    test<int>(explicit_allocator<int>());
+    test<NotConstructible>(explicit_allocator<NotConstructible>{});
 #endif
 }
diff --git a/test/std/containers/sequences/forwardlist/forwardlist.cons/alloc.pass.cpp b/test/std/containers/sequences/forwardlist/forwardlist.cons/alloc.pass.cpp
index 352945c85..531afb26c 100644
--- a/test/std/containers/sequences/forwardlist/forwardlist.cons/alloc.pass.cpp
+++ b/test/std/containers/sequences/forwardlist/forwardlist.cons/alloc.pass.cpp
@@ -37,5 +37,13 @@ int main()
         assert(c.get_allocator() == A());
         assert(c.empty());
     }
+    {
+        typedef explicit_allocator<NotConstructible> A;
+        typedef A::value_type T;
+        typedef std::forward_list<T, A> C;
+        C c(A{});
+        assert(c.get_allocator() == A());
+        assert(c.empty());
+    }
 #endif
 }
diff --git a/test/std/containers/sequences/list/list.cons/default.pass.cpp b/test/std/containers/sequences/list/list.cons/default.pass.cpp
index 3c1c2ef16..ce04eef52 100644
--- a/test/std/containers/sequences/list/list.cons/default.pass.cpp
+++ b/test/std/containers/sequences/list/list.cons/default.pass.cpp
@@ -54,5 +54,15 @@ int main()
         assert(l.size() == 0);
         assert(std::distance(l.begin(), l.end()) == 0);
     }
+    {
+        std::list<int, explicit_allocator<int>> l;
+        assert(l.size() == 0);
+        assert(std::distance(l.begin(), l.end()) == 0);
+    }
+    {
+        std::list<int, explicit_allocator<int>> l((explicit_allocator<int>()));
+        assert(l.size() == 0);
+        assert(std::distance(l.begin(), l.end()) == 0);
+    }
 #endif
 }
diff --git a/test/std/containers/sequences/vector.bool/construct_default.pass.cpp b/test/std/containers/sequences/vector.bool/construct_default.pass.cpp
index 983d363d1..a18ba8fba 100644
--- a/test/std/containers/sequences/vector.bool/construct_default.pass.cpp
+++ b/test/std/containers/sequences/vector.bool/construct_default.pass.cpp
@@ -66,5 +66,9 @@ int main()
     test0<std::vector<bool, min_allocator<bool>> >();
     test1<std::vector<bool, min_allocator<bool> > >(min_allocator<bool>());
     }
+    {
+    test0<std::vector<bool, explicit_allocator<bool>> >();
+    test1<std::vector<bool, explicit_allocator<bool> > >(explicit_allocator<bool>());
+    }
 #endif
 }
diff --git a/test/std/containers/sequences/vector/vector.cons/construct_default.pass.cpp b/test/std/containers/sequences/vector/vector.cons/construct_default.pass.cpp
index e0542e751..4e6eb00ce 100644
--- a/test/std/containers/sequences/vector/vector.cons/construct_default.pass.cpp
+++ b/test/std/containers/sequences/vector/vector.cons/construct_default.pass.cpp
@@ -86,5 +86,17 @@ int main()
         std::vector<int, min_allocator<int> > v;
         assert(v.empty());
     }
+
+    {
+    test0<std::vector<int, explicit_allocator<int>> >();
+    test0<std::vector<NotConstructible, explicit_allocator<NotConstructible>> >();
+    test1<std::vector<int, explicit_allocator<int> > >(explicit_allocator<int>{});
+    test1<std::vector<NotConstructible, explicit_allocator<NotConstructible> > >
+        (explicit_allocator<NotConstructible>{});
+    }
+    {
+        std::vector<int, explicit_allocator<int> > v;
+        assert(v.empty());
+    }
 #endif
 }
diff --git a/test/std/containers/unord/unord.map/unord.map.cnstr/allocator.pass.cpp b/test/std/containers/unord/unord.map/unord.map.cnstr/allocator.pass.cpp
index 5253b600b..6caa59728 100644
--- a/test/std/containers/unord/unord.map/unord.map.cnstr/allocator.pass.cpp
+++ b/test/std/containers/unord/unord.map/unord.map.cnstr/allocator.pass.cpp
@@ -66,7 +66,25 @@ int main()
         assert(c.load_factor() == 0);
         assert(c.max_load_factor() == 1);
     }
-#if _LIBCPP_STD_VER > 11
+    {
+        typedef explicit_allocator<std::pair<const NotConstructible, NotConstructible>> A;
+        typedef std::unordered_map<NotConstructible, NotConstructible,
+                                   test_hash<std::hash<NotConstructible> >,
+                                   test_compare<std::equal_to<NotConstructible> >,
+                                   A
+                                   > C;
+        C c(A{});
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == A{});
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+    }
+#if TEST_STD_VER > 11
     {
         typedef NotConstructible T;
         typedef test_allocator<std::pair<const T, T>> A;
diff --git a/test/std/containers/unord/unord.map/unord.map.cnstr/copy_alloc.pass.cpp b/test/std/containers/unord/unord.map/unord.map.cnstr/copy_alloc.pass.cpp
index 41bfc9d40..6dd848a56 100644
--- a/test/std/containers/unord/unord.map/unord.map.cnstr/copy_alloc.pass.cpp
+++ b/test/std/containers/unord/unord.map/unord.map.cnstr/copy_alloc.pass.cpp
@@ -108,5 +108,44 @@ int main()
         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const int, std::string>> A;
+        typedef std::unordered_map<int, std::string,
+                                   test_hash<std::hash<int> >,
+                                   test_compare<std::equal_to<int> >,
+                                   A
+                                   > C;
+        typedef std::pair<int, std::string> P;
+        P a[] =
+        {
+            P(1, "one"),
+            P(2, "two"),
+            P(3, "three"),
+            P(4, "four"),
+            P(1, "four"),
+            P(2, "four"),
+        };
+        C c0(a, a + sizeof(a)/sizeof(a[0]),
+            7,
+            test_hash<std::hash<int> >(8),
+            test_compare<std::equal_to<int> >(9),
+            A{}
+           );
+        C c(c0, A{});
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.size() == 4);
+        assert(c.at(1) == "one");
+        assert(c.at(2) == "two");
+        assert(c.at(3) == "three");
+        assert(c.at(4) == "four");
+        assert(c.hash_function() == test_hash<std::hash<int> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
+        assert(c.get_allocator() == A{});
+        assert(!c.empty());
+        assert(std::distance(c.begin(), c.end()) == c.size());
+        assert(std::distance(c.cbegin(), c.cend()) == c.size());
+        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
+        assert(c.max_load_factor() == 1);
+    }
 #endif
 }
diff --git a/test/std/containers/unord/unord.map/unord.map.cnstr/default.pass.cpp b/test/std/containers/unord/unord.map/unord.map.cnstr/default.pass.cpp
index 8d309c843..04d172e4d 100644
--- a/test/std/containers/unord/unord.map/unord.map.cnstr/default.pass.cpp
+++ b/test/std/containers/unord/unord.map/unord.map.cnstr/default.pass.cpp
@@ -66,6 +66,39 @@ int main()
         assert(c.load_factor() == 0);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const NotConstructible, NotConstructible>> A;
+        typedef std::unordered_map<NotConstructible, NotConstructible,
+                                   test_hash<std::hash<NotConstructible> >,
+                                   test_compare<std::equal_to<NotConstructible> >,
+                                   A
+                                   > C;
+        {
+        C c;
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == A());
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+        }
+        {
+        A a;
+        C c(a);
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == a);
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+        }
+    }
     {
         std::unordered_map<int, int> c = {};
         LIBCPP_ASSERT(c.bucket_count() == 0);
diff --git a/test/std/containers/unord/unord.map/unord.map.cnstr/init_size_hash_equal_allocator.pass.cpp b/test/std/containers/unord/unord.map/unord.map.cnstr/init_size_hash_equal_allocator.pass.cpp
index 156bafb10..e8d356225 100644
--- a/test/std/containers/unord/unord.map/unord.map.cnstr/init_size_hash_equal_allocator.pass.cpp
+++ b/test/std/containers/unord/unord.map/unord.map.cnstr/init_size_hash_equal_allocator.pass.cpp
@@ -104,6 +104,42 @@ int main()
         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const int, std::string>> A;
+        typedef std::unordered_map<int, std::string,
+                                   test_hash<std::hash<int> >,
+                                   test_compare<std::equal_to<int> >,
+                                   A
+                                   > C;
+        typedef std::pair<int, std::string> P;
+        C c({
+                P(1, "one"),
+                P(2, "two"),
+                P(3, "three"),
+                P(4, "four"),
+                P(1, "four"),
+                P(2, "four"),
+            },
+            7,
+            test_hash<std::hash<int> >(8),
+            test_compare<std::equal_to<int> >(9),
+            A{}
+           );
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.size() == 4);
+        assert(c.at(1) == "one");
+        assert(c.at(2) == "two");
+        assert(c.at(3) == "three");
+        assert(c.at(4) == "four");
+        assert(c.hash_function() == test_hash<std::hash<int> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
+        assert(c.get_allocator() == A{});
+        assert(!c.empty());
+        assert(std::distance(c.begin(), c.end()) == c.size());
+        assert(std::distance(c.cbegin(), c.cend()) == c.size());
+        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
+        assert(c.max_load_factor() == 1);
+    }
 #endif
 #endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 }
diff --git a/test/std/containers/unord/unord.map/unord.map.cnstr/move_alloc.pass.cpp b/test/std/containers/unord/unord.map/unord.map.cnstr/move_alloc.pass.cpp
index 16586b35e..58c9b5198 100644
--- a/test/std/containers/unord/unord.map/unord.map.cnstr/move_alloc.pass.cpp
+++ b/test/std/containers/unord/unord.map/unord.map.cnstr/move_alloc.pass.cpp
@@ -152,6 +152,47 @@ int main()
         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
         assert(c.max_load_factor() == 1);
 
+        assert(c0.empty());
+    }
+    {
+        typedef std::pair<int, std::string> P;
+        typedef explicit_allocator<std::pair<const int, std::string>> A;
+        typedef std::unordered_map<int, std::string,
+                                   test_hash<std::hash<int> >,
+                                   test_compare<std::equal_to<int> >,
+                                   A
+                                   > C;
+        P a[] =
+        {
+            P(1, "one"),
+            P(2, "two"),
+            P(3, "three"),
+            P(4, "four"),
+            P(1, "four"),
+            P(2, "four"),
+        };
+        C c0(a, a + sizeof(a)/sizeof(a[0]),
+            7,
+            test_hash<std::hash<int> >(8),
+            test_compare<std::equal_to<int> >(9),
+            A{}
+           );
+        C c(std::move(c0), A{});
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.size() == 4);
+        assert(c.at(1) == "one");
+        assert(c.at(2) == "two");
+        assert(c.at(3) == "three");
+        assert(c.at(4) == "four");
+        assert(c.hash_function() == test_hash<std::hash<int> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
+        assert(c.get_allocator() == A{});
+        assert(!c.empty());
+        assert(std::distance(c.begin(), c.end()) == c.size());
+        assert(std::distance(c.cbegin(), c.cend()) == c.size());
+        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
+        assert(c.max_load_factor() == 1);
+
         assert(c0.empty());
     }
 #endif
diff --git a/test/std/containers/unord/unord.map/unord.map.cnstr/range_size_hash_equal_allocator.pass.cpp b/test/std/containers/unord/unord.map/unord.map.cnstr/range_size_hash_equal_allocator.pass.cpp
index f01efd093..890ed2e8b 100644
--- a/test/std/containers/unord/unord.map/unord.map.cnstr/range_size_hash_equal_allocator.pass.cpp
+++ b/test/std/containers/unord/unord.map/unord.map.cnstr/range_size_hash_equal_allocator.pass.cpp
@@ -111,5 +111,43 @@ int main()
         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const int, std::string>> A;
+        typedef std::unordered_map<int, std::string,
+                                   test_hash<std::hash<int> >,
+                                   test_compare<std::equal_to<int> >,
+                                   A
+                                   > C;
+        typedef std::pair<int, std::string> P;
+        P a[] =
+        {
+            P(1, "one"),
+            P(2, "two"),
+            P(3, "three"),
+            P(4, "four"),
+            P(1, "four"),
+            P(2, "four"),
+        };
+        C c(input_iterator<P*>(a), input_iterator<P*>(a + sizeof(a)/sizeof(a[0])),
+            7,
+            test_hash<std::hash<int> >(8),
+            test_compare<std::equal_to<int> >(9),
+            A{}
+           );
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.size() == 4);
+        assert(c.at(1) == "one");
+        assert(c.at(2) == "two");
+        assert(c.at(3) == "three");
+        assert(c.at(4) == "four");
+        assert(c.hash_function() == test_hash<std::hash<int> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
+        assert(c.get_allocator() == A{});
+        assert(!c.empty());
+        assert(std::distance(c.begin(), c.end()) == c.size());
+        assert(std::distance(c.cbegin(), c.cend()) == c.size());
+        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
+        assert(c.max_load_factor() == 1);
+    }
 #endif
 }
diff --git a/test/std/containers/unord/unord.map/unord.map.cnstr/size_hash_equal_allocator.pass.cpp b/test/std/containers/unord/unord.map/unord.map.cnstr/size_hash_equal_allocator.pass.cpp
index 84d4795ac..58c397c2b 100644
--- a/test/std/containers/unord/unord.map/unord.map.cnstr/size_hash_equal_allocator.pass.cpp
+++ b/test/std/containers/unord/unord.map/unord.map.cnstr/size_hash_equal_allocator.pass.cpp
@@ -74,5 +74,27 @@ int main()
         assert(c.load_factor() == 0);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const NotConstructible, NotConstructible> > A;
+        typedef std::unordered_map<NotConstructible, NotConstructible,
+                                   test_hash<std::hash<NotConstructible> >,
+                                   test_compare<std::equal_to<NotConstructible> >,
+                                   A
+                                   > C;
+        C c(7,
+            test_hash<std::hash<NotConstructible> >(8),
+            test_compare<std::equal_to<NotConstructible> >(9),
+            A{}
+           );
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >(9));
+        assert(c.get_allocator() == A{});
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+    }
 #endif
 }
diff --git a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/allocator.pass.cpp b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/allocator.pass.cpp
index 2005f00a7..76a728e8d 100644
--- a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/allocator.pass.cpp
+++ b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/allocator.pass.cpp
@@ -66,6 +66,24 @@ int main()
         assert(c.load_factor() == 0);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const NotConstructible, NotConstructible>> A;
+        typedef std::unordered_multimap<NotConstructible, NotConstructible,
+                                   test_hash<std::hash<NotConstructible> >,
+                                   test_compare<std::equal_to<NotConstructible> >,
+                                   A
+                                   > C;
+        C c(A{});
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == A{});
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+    }
 #if _LIBCPP_STD_VER > 11
     {
         typedef NotConstructible T;
diff --git a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/copy_alloc.pass.cpp b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/copy_alloc.pass.cpp
index b91aea030..bb577ea15 100644
--- a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/copy_alloc.pass.cpp
+++ b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/copy_alloc.pass.cpp
@@ -136,5 +136,58 @@ int main()
         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const int, std::string>> A;
+        typedef std::unordered_multimap<int, std::string,
+                                   test_hash<std::hash<int> >,
+                                   test_compare<std::equal_to<int> >,
+                                   A
+                                   > C;
+        typedef std::pair<int, std::string> P;
+        P a[] =
+        {
+            P(1, "one"),
+            P(2, "two"),
+            P(3, "three"),
+            P(4, "four"),
+            P(1, "four"),
+            P(2, "four"),
+        };
+        C c0(a, a + sizeof(a)/sizeof(a[0]),
+            7,
+            test_hash<std::hash<int> >(8),
+            test_compare<std::equal_to<int> >(9),
+            A{}
+           );
+        C c(c0, A{});
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.size() == 6);
+        C::const_iterator i = c.cbegin();
+        assert(i->first == 1);
+        assert(i->second == "one");
+        ++i;
+        assert(i->first == 1);
+        assert(i->second == "four");
+        ++i;
+        assert(i->first == 2);
+        assert(i->second == "two");
+        ++i;
+        assert(i->first == 2);
+        assert(i->second == "four");
+        ++i;
+        assert(i->first == 3);
+        assert(i->second == "three");
+        ++i;
+        assert(i->first == 4);
+        assert(i->second == "four");
+        assert(c.hash_function() == test_hash<std::hash<int> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
+        assert(c.get_allocator() == A{});
+        assert(!c.empty());
+        assert(std::distance(c.begin(), c.end()) == c.size());
+        assert(std::distance(c.cbegin(), c.cend()) == c.size());
+        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
+        assert(c.max_load_factor() == 1);
+    }
 #endif
 }
diff --git a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/default.pass.cpp b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/default.pass.cpp
index 1cb2de7a6..8418c885e 100644
--- a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/default.pass.cpp
+++ b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/default.pass.cpp
@@ -66,6 +66,39 @@ int main()
         assert(c.load_factor() == 0);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const NotConstructible, NotConstructible>> A;
+        typedef std::unordered_multimap<NotConstructible, NotConstructible,
+                                   test_hash<std::hash<NotConstructible> >,
+                                   test_compare<std::equal_to<NotConstructible> >,
+                                   A
+                                   > C;
+        {
+        C c;
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == A());
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+        }
+        {
+        A a;
+        C c(a);
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == a);
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+        }
+    }
     {
         std::unordered_multimap<int, int> c = {};
         LIBCPP_ASSERT(c.bucket_count() == 0);
diff --git a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/init_size_hash_equal_allocator.pass.cpp b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/init_size_hash_equal_allocator.pass.cpp
index a003196f9..79e64705f 100644
--- a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/init_size_hash_equal_allocator.pass.cpp
+++ b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/init_size_hash_equal_allocator.pass.cpp
@@ -148,6 +148,65 @@ int main()
         assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
         assert((c.get_allocator() == min_allocator<std::pair<const int, std::string> >()));
     }
+    {
+        typedef explicit_allocator<std::pair<const int, std::string>> A;
+        typedef std::unordered_multimap<int, std::string,
+                                   test_hash<std::hash<int> >,
+                                   test_compare<std::equal_to<int> >,
+                                   A
+                                   > C;
+        typedef std::pair<int, std::string> P;
+        C c({
+                P(1, "one"),
+                P(2, "two"),
+                P(3, "three"),
+                P(4, "four"),
+                P(1, "four"),
+                P(2, "four"),
+            },
+            7,
+            test_hash<std::hash<int> >(8),
+            test_compare<std::equal_to<int> >(9),
+            A{}
+           );
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.size() == 6);
+        typedef std::pair<C::const_iterator, C::const_iterator> Eq;
+        Eq eq = c.equal_range(1);
+        assert(std::distance(eq.first, eq.second) == 2);
+        C::const_iterator i = eq.first;
+        assert(i->first == 1);
+        assert(i->second == "one");
+        ++i;
+        assert(i->first == 1);
+        assert(i->second == "four");
+        eq = c.equal_range(2);
+        assert(std::distance(eq.first, eq.second) == 2);
+        i = eq.first;
+        assert(i->first == 2);
+        assert(i->second == "two");
+        ++i;
+        assert(i->first == 2);
+        assert(i->second == "four");
+
+        eq = c.equal_range(3);
+        assert(std::distance(eq.first, eq.second) == 1);
+        i = eq.first;
+        assert(i->first == 3);
+        assert(i->second == "three");
+        eq = c.equal_range(4);
+        assert(std::distance(eq.first, eq.second) == 1);
+        i = eq.first;
+        assert(i->first == 4);
+        assert(i->second == "four");
+        assert(std::distance(c.begin(), c.end()) == c.size());
+        assert(std::distance(c.cbegin(), c.cend()) == c.size());
+        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
+        assert(c.max_load_factor() == 1);
+        assert(c.hash_function() == test_hash<std::hash<int> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
+        assert(c.get_allocator() == A{});
+    }
 #endif
 #endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 }
diff --git a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/move_alloc.pass.cpp b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/move_alloc.pass.cpp
index 11942cf48..b43ec0806 100644
--- a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/move_alloc.pass.cpp
+++ b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/move_alloc.pass.cpp
@@ -223,6 +223,70 @@ int main()
         assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
         assert((c.get_allocator() == min_allocator<std::pair<const int, std::string> >()));
 
+        assert(c0.empty());
+    }
+    {
+        typedef std::pair<int, std::string> P;
+        typedef explicit_allocator<std::pair<const int, std::string>> A;
+        typedef std::unordered_multimap<int, std::string,
+                                   test_hash<std::hash<int> >,
+                                   test_compare<std::equal_to<int> >,
+                                   A
+                                   > C;
+        P a[] =
+        {
+            P(1, "one"),
+            P(2, "two"),
+            P(3, "three"),
+            P(4, "four"),
+            P(1, "four"),
+            P(2, "four"),
+        };
+        C c0(a, a + sizeof(a)/sizeof(a[0]),
+            7,
+            test_hash<std::hash<int> >(8),
+            test_compare<std::equal_to<int> >(9),
+            A{}
+           );
+        C c(std::move(c0), A());
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.size() == 6);
+        typedef std::pair<C::const_iterator, C::const_iterator> Eq;
+        Eq eq = c.equal_range(1);
+        assert(std::distance(eq.first, eq.second) == 2);
+        C::const_iterator i = eq.first;
+        assert(i->first == 1);
+        assert(i->second == "one");
+        ++i;
+        assert(i->first == 1);
+        assert(i->second == "four");
+        eq = c.equal_range(2);
+        assert(std::distance(eq.first, eq.second) == 2);
+        i = eq.first;
+        assert(i->first == 2);
+        assert(i->second == "two");
+        ++i;
+        assert(i->first == 2);
+        assert(i->second == "four");
+
+        eq = c.equal_range(3);
+        assert(std::distance(eq.first, eq.second) == 1);
+        i = eq.first;
+        assert(i->first == 3);
+        assert(i->second == "three");
+        eq = c.equal_range(4);
+        assert(std::distance(eq.first, eq.second) == 1);
+        i = eq.first;
+        assert(i->first == 4);
+        assert(i->second == "four");
+        assert(std::distance(c.begin(), c.end()) == c.size());
+        assert(std::distance(c.cbegin(), c.cend()) == c.size());
+        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
+        assert(c.max_load_factor() == 1);
+        assert(c.hash_function() == test_hash<std::hash<int> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
+        assert(c.get_allocator() == A{});
+
         assert(c0.empty());
     }
 #endif
diff --git a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/range_size_hash_equal_allocator.pass.cpp b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/range_size_hash_equal_allocator.pass.cpp
index f5b2bbe84..7e2814fd5 100644
--- a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/range_size_hash_equal_allocator.pass.cpp
+++ b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/range_size_hash_equal_allocator.pass.cpp
@@ -155,5 +155,66 @@ int main()
         assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
         assert((c.get_allocator() == min_allocator<std::pair<const int, std::string> >()));
     }
+    {
+        typedef explicit_allocator<std::pair<const int, std::string>> A;
+        typedef std::unordered_multimap<int, std::string,
+                                   test_hash<std::hash<int> >,
+                                   test_compare<std::equal_to<int> >,
+                                   A
+                                   > C;
+        typedef std::pair<int, std::string> P;
+        P a[] =
+        {
+            P(1, "one"),
+            P(2, "two"),
+            P(3, "three"),
+            P(4, "four"),
+            P(1, "four"),
+            P(2, "four"),
+        };
+        C c(input_iterator<P*>(a), input_iterator<P*>(a + sizeof(a)/sizeof(a[0])),
+            7,
+            test_hash<std::hash<int> >(8),
+            test_compare<std::equal_to<int> >(9),
+            A{}
+           );
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.size() == 6);
+        typedef std::pair<C::const_iterator, C::const_iterator> Eq;
+        Eq eq = c.equal_range(1);
+        assert(std::distance(eq.first, eq.second) == 2);
+        C::const_iterator i = eq.first;
+        assert(i->first == 1);
+        assert(i->second == "one");
+        ++i;
+        assert(i->first == 1);
+        assert(i->second == "four");
+        eq = c.equal_range(2);
+        assert(std::distance(eq.first, eq.second) == 2);
+        i = eq.first;
+        assert(i->first == 2);
+        assert(i->second == "two");
+        ++i;
+        assert(i->first == 2);
+        assert(i->second == "four");
+
+        eq = c.equal_range(3);
+        assert(std::distance(eq.first, eq.second) == 1);
+        i = eq.first;
+        assert(i->first == 3);
+        assert(i->second == "three");
+        eq = c.equal_range(4);
+        assert(std::distance(eq.first, eq.second) == 1);
+        i = eq.first;
+        assert(i->first == 4);
+        assert(i->second == "four");
+        assert(std::distance(c.begin(), c.end()) == c.size());
+        assert(std::distance(c.cbegin(), c.cend()) == c.size());
+        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
+        assert(c.max_load_factor() == 1);
+        assert(c.hash_function() == test_hash<std::hash<int> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
+        assert(c.get_allocator() == A{});;
+    }
 #endif
 }
diff --git a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/size_hash_equal_allocator.pass.cpp b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/size_hash_equal_allocator.pass.cpp
index 764bf93f3..2b3b0e2ab 100644
--- a/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/size_hash_equal_allocator.pass.cpp
+++ b/test/std/containers/unord/unord.multimap/unord.multimap.cnstr/size_hash_equal_allocator.pass.cpp
@@ -74,5 +74,27 @@ int main()
         assert(c.load_factor() == 0);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<std::pair<const NotConstructible, NotConstructible> > A;
+        typedef std::unordered_multimap<NotConstructible, NotConstructible,
+                                   test_hash<std::hash<NotConstructible> >,
+                                   test_compare<std::equal_to<NotConstructible> >,
+                                   A
+                                   > C;
+        C c(7,
+            test_hash<std::hash<NotConstructible> >(8),
+            test_compare<std::equal_to<NotConstructible> >(9),
+            A{}
+           );
+        LIBCPP_ASSERT(c.bucket_count() == 7);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >(8));
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >(9));
+        assert(c.get_allocator() == A{});
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+    }
 #endif
 }
diff --git a/test/std/containers/unord/unord.multiset/unord.multiset.cnstr/default.pass.cpp b/test/std/containers/unord/unord.multiset/unord.multiset.cnstr/default.pass.cpp
index da6cbe826..4b4487f00 100644
--- a/test/std/containers/unord/unord.multiset/unord.multiset.cnstr/default.pass.cpp
+++ b/test/std/containers/unord/unord.multiset/unord.multiset.cnstr/default.pass.cpp
@@ -62,6 +62,39 @@ int main()
         assert(c.load_factor() == 0);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<NotConstructible> A;
+        typedef std::unordered_multiset<NotConstructible,
+                                   test_hash<std::hash<NotConstructible> >,
+                                   test_compare<std::equal_to<NotConstructible> >,
+                                   A
+                                   > C;
+        {
+        C c;
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == A());
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+        }
+        {
+        A a;
+        C c(a);
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == a);
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+        }
+    }
     {
         std::unordered_multiset<int> c = {};
         LIBCPP_ASSERT(c.bucket_count() == 0);
diff --git a/test/std/containers/unord/unord.set/unord.set.cnstr/default.pass.cpp b/test/std/containers/unord/unord.set/unord.set.cnstr/default.pass.cpp
index 3af90952d..81ad16b72 100644
--- a/test/std/containers/unord/unord.set/unord.set.cnstr/default.pass.cpp
+++ b/test/std/containers/unord/unord.set/unord.set.cnstr/default.pass.cpp
@@ -62,6 +62,39 @@ int main()
         assert(c.load_factor() == 0);
         assert(c.max_load_factor() == 1);
     }
+    {
+        typedef explicit_allocator<NotConstructible> A;
+        typedef std::unordered_set<NotConstructible,
+                                   test_hash<std::hash<NotConstructible> >,
+                                   test_compare<std::equal_to<NotConstructible> >,
+                                   A
+                                   > C;
+        {
+        C c;
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == A());
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+        }
+        {
+    	A a;
+        C c(a);
+        LIBCPP_ASSERT(c.bucket_count() == 0);
+        assert(c.hash_function() == test_hash<std::hash<NotConstructible> >());
+        assert(c.key_eq() == test_compare<std::equal_to<NotConstructible> >());
+        assert(c.get_allocator() == a);
+        assert(c.size() == 0);
+        assert(c.empty());
+        assert(std::distance(c.begin(), c.end()) == 0);
+        assert(c.load_factor() == 0);
+        assert(c.max_load_factor() == 1);
+        }
+    }
     {
         std::unordered_set<int> c = {};
         LIBCPP_ASSERT(c.bucket_count() == 0);
diff --git a/test/std/strings/basic.string/string.cons/alloc.pass.cpp b/test/std/strings/basic.string/string.cons/alloc.pass.cpp
index a803d331b..81537ba52 100644
--- a/test/std/strings/basic.string/string.cons/alloc.pass.cpp
+++ b/test/std/strings/basic.string/string.cons/alloc.pass.cpp
@@ -91,5 +91,6 @@ int main()
     test<std::basic_string<char, std::char_traits<char>, test_allocator<char> > >();
 #if TEST_STD_VER >= 11
     test2<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
+    test2<std::basic_string<char, std::char_traits<char>, explicit_allocator<char> > >();
 #endif
 }
diff --git a/test/support/min_allocator.h b/test/support/min_allocator.h
index 701159e04..8e0afab47 100644
--- a/test/support/min_allocator.h
+++ b/test/support/min_allocator.h
@@ -340,6 +340,31 @@ public:
     friend bool operator!=(min_allocator x, min_allocator y) {return !(x == y);}
 };
 
+template <class T>
+class explicit_allocator
+{
+public:
+    typedef T value_type;
+
+    explicit_allocator() TEST_NOEXCEPT {}
+
+    template <class U>
+    explicit explicit_allocator(explicit_allocator<U>) TEST_NOEXCEPT {}
+
+    T* allocate(std::size_t n)
+    {
+        return static_cast<T*>(::operator new(n*sizeof(T)));
+    }
+
+    void deallocate(T* p, std::size_t)
+    {
+        return ::operator delete(static_cast<void*>(p));
+    }
+
+    friend bool operator==(explicit_allocator, explicit_allocator) {return true;}
+    friend bool operator!=(explicit_allocator x, explicit_allocator y) {return !(x == y);}
+};
+
 #endif  // TEST_STD_VER >= 11
 
 #endif  // MIN_ALLOCATOR_H