Imported Upstream version 1.64.0
[platform/upstream/boost.git] / libs / unordered / test / unordered / insert_tests.cpp
index 019d2ac..ae50fa1 100644 (file)
@@ -3,13 +3,14 @@
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
+// clang-format off
 #include "../helpers/prefix.hpp"
 #include <boost/unordered_set.hpp>
 #include <boost/unordered_map.hpp>
 #include "../helpers/postfix.hpp"
+// clang-format on
 
 #include "../helpers/test.hpp"
-#include <boost/next_prior.hpp>
 #include "../objects/test.hpp"
 #include "../helpers/random_values.hpp"
 #include "../helpers/tracker.hpp"
@@ -21,7 +22,7 @@
 #include <iostream>
 
 namespace insert_tests {
-    
+
 test::seed_t initialize_seed(243432);
 
 template <class X>
@@ -32,30 +33,30 @@ void unique_insert_tests1(X*, test::random_generator generator)
     typedef BOOST_DEDUCED_TYPENAME X::iterator iterator;
     typedef test::ordered<X> ordered;
 
-    std::cerr<<"insert(value) tests for containers with unique keys.\n";
+    std::cerr << "insert(value) tests for containers with unique keys.\n";
 
     X x;
     test::ordered<X> tracker = test::create_ordered(x);
 
     test::random_values<X> v(1000, generator);
 
-    for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
-            it != v.end(); ++it)
-    {
+    for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
+         it != v.end(); ++it) {
 
         BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count = x.bucket_count();
         float b = x.max_load_factor();
 
         std::pair<iterator, bool> r1 = x.insert(*it);
-        std::pair<BOOST_DEDUCED_TYPENAME ordered::iterator, bool>
-            r2 = tracker.insert(*it);
+        std::pair<BOOST_DEDUCED_TYPENAME ordered::iterator, bool> r2 =
+            tracker.insert(*it);
 
         BOOST_TEST(r1.second == r2.second);
         BOOST_TEST(*r1.first == *r2.first);
 
         tracker.compare_key(x, *it);
 
-        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+        if (static_cast<double>(x.size()) <=
+            b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
@@ -65,45 +66,43 @@ void unique_insert_tests1(X*, test::random_generator generator)
 template <class X>
 void equivalent_insert_tests1(X*, test::random_generator generator)
 {
-    std::cerr<<"insert(value) tests for containers with equivalent keys.\n";
+    std::cerr << "insert(value) tests for containers with equivalent keys.\n";
 
     test::check_instances check_;
 
-
     X x;
     test::ordered<X> tracker = test::create_ordered(x);
 
     test::random_values<X> v(1000, generator);
-    for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
-            it != v.end(); ++it)
-    {
+    for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
+         it != v.end(); ++it) {
         BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count = x.bucket_count();
         float b = x.max_load_factor();
 
         BOOST_DEDUCED_TYPENAME X::iterator r1 = x.insert(*it);
-        BOOST_DEDUCED_TYPENAME test::ordered<X>::iterator r2
-            tracker.insert(*it);
+        BOOST_DEDUCED_TYPENAME test::ordered<X>::iterator r2 =
+            tracker.insert(*it);
 
         BOOST_TEST(*r1 == *r2);
 
         tracker.compare_key(x, *it);
 
-        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+        if (static_cast<double>(x.size()) <=
+            b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
     test::check_equivalent_keys(x);
 }
 
-template <class X>
-void insert_tests2(X*, test::random_generator generator)
+template <class X> void insert_tests2(X*, test::random_generator generator)
 {
     typedef BOOST_DEDUCED_TYPENAME test::ordered<X> tracker_type;
     typedef BOOST_DEDUCED_TYPENAME X::iterator iterator;
     typedef BOOST_DEDUCED_TYPENAME X::const_iterator const_iterator;
     typedef BOOST_DEDUCED_TYPENAME tracker_type::iterator tracker_iterator;
 
-    std::cerr<<"insert(begin(), value) tests.\n";
+    std::cerr << "insert(begin(), value) tests.\n";
 
     {
         test::check_instances check_;
@@ -112,11 +111,11 @@ void insert_tests2(X*, test::random_generator generator)
         tracker_type tracker = test::create_ordered(x);
 
         test::random_values<X> v(1000, generator);
-        for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator
-            it = v.begin(); it != v.end(); ++it)
-        {
-            BOOST_DEDUCED_TYPENAME X::size_type
-                old_bucket_count = x.bucket_count();
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
             float b = x.max_load_factor();
 
             iterator r1 = x.insert(x.begin(), *it);
@@ -124,14 +123,16 @@ void insert_tests2(X*, test::random_generator generator)
             BOOST_TEST(*r1 == *r2);
             tracker.compare_key(x, *it);
 
-            if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+            if (static_cast<double>(x.size()) <=
+                b * static_cast<double>(old_bucket_count))
                 BOOST_TEST(x.bucket_count() == old_bucket_count);
         }
 
+        tracker.compare(x);
         test::check_equivalent_keys(x);
     }
 
-    std::cerr<<"insert(end(), value) tests.\n";
+    std::cerr << "insert(end(), value) tests.\n";
 
     {
         test::check_instances check_;
@@ -141,11 +142,11 @@ void insert_tests2(X*, test::random_generator generator)
         tracker_type tracker = test::create_ordered(x);
 
         test::random_values<X> v(100, generator);
-        for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator
-            it = v.begin(); it != v.end(); ++it)
-        {
-            BOOST_DEDUCED_TYPENAME X::size_type
-                old_bucket_count = x.bucket_count();
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
             float b = x.max_load_factor();
 
             const_iterator r1 = x.insert(x_const.end(), *it);
@@ -153,14 +154,16 @@ void insert_tests2(X*, test::random_generator generator)
             BOOST_TEST(*r1 == *r2);
             tracker.compare_key(x, *it);
 
-            if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+            if (static_cast<double>(x.size()) <=
+                b * static_cast<double>(old_bucket_count))
                 BOOST_TEST(x.bucket_count() == old_bucket_count);
         }
 
+        tracker.compare(x);
         test::check_equivalent_keys(x);
     }
 
-    std::cerr<<"insert(pos, value) tests.\n";
+    std::cerr << "insert(pos, value) tests.\n";
 
     {
         test::check_instances check_;
@@ -170,11 +173,11 @@ void insert_tests2(X*, test::random_generator generator)
         tracker_type tracker = test::create_ordered(x);
 
         test::random_values<X> v(1000, generator);
-        for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator
-            it = v.begin(); it != v.end(); ++it)
-        {
-            BOOST_DEDUCED_TYPENAME X::size_type
-                old_bucket_count = x.bucket_count();
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
             float b = x.max_load_factor();
 
             pos = x.insert(pos, *it);
@@ -182,14 +185,16 @@ void insert_tests2(X*, test::random_generator generator)
             BOOST_TEST(*pos == *r2);
             tracker.compare_key(x, *it);
 
-            if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+            if (static_cast<double>(x.size()) <=
+                b * static_cast<double>(old_bucket_count))
                 BOOST_TEST(x.bucket_count() == old_bucket_count);
         }
 
+        tracker.compare(x);
         test::check_equivalent_keys(x);
     }
 
-    std::cerr<<"insert single item range tests.\n";
+    std::cerr << "insert single item range tests.\n";
 
     {
         test::check_instances check_;
@@ -198,25 +203,27 @@ void insert_tests2(X*, test::random_generator generator)
         tracker_type tracker = test::create_ordered(x);
 
         test::random_values<X> v(1000, generator);
-        for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator
-            it = v.begin(); it != v.end(); ++it)
-        {
-            BOOST_DEDUCED_TYPENAME X::size_type
-                old_bucket_count = x.bucket_count();
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
             float b = x.max_load_factor();
 
-            x.insert(it, boost::next(it));
+            x.insert(it, test::next(it));
             tracker.insert(*it);
             tracker.compare_key(x, *it);
 
-            if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+            if (static_cast<double>(x.size()) <=
+                b * static_cast<double>(old_bucket_count))
                 BOOST_TEST(x.bucket_count() == old_bucket_count);
         }
 
+        tracker.compare(x);
         test::check_equivalent_keys(x);
     }
 
-    std::cerr<<"insert range tests.\n";
+    std::cerr << "insert range tests.\n";
 
     {
         test::check_instances check_;
@@ -230,7 +237,7 @@ void insert_tests2(X*, test::random_generator generator)
         test::check_equivalent_keys(x);
     }
 
-    std::cerr<<"insert range with rehash tests.\n";
+    std::cerr << "insert range with rehash tests.\n";
 
     {
         test::check_instances check_;
@@ -248,7 +255,7 @@ void insert_tests2(X*, test::random_generator generator)
         test::check_equivalent_keys(x);
     }
 
-    std::cerr<<"insert input iterator range tests.\n";
+    std::cerr << "insert input iterator range tests.\n";
 
     {
         test::check_instances check_;
@@ -257,14 +264,15 @@ void insert_tests2(X*, test::random_generator generator)
 
         test::random_values<X> v(1000, generator);
         BOOST_DEDUCED_TYPENAME test::random_values<X>::const_iterator
-            begin = v.begin(), end = v.end();
+            begin = v.begin(),
+            end = v.end();
         x.insert(test::input_iterator(begin), test::input_iterator(end));
         test::check_container(x, v);
 
         test::check_equivalent_keys(x);
     }
 
-    std::cerr<<"insert copy iterator range tests.\n";
+    std::cerr << "insert copy iterator range tests.\n";
 
     {
         test::check_instances check_;
@@ -278,7 +286,7 @@ void insert_tests2(X*, test::random_generator generator)
         test::check_equivalent_keys(x);
     }
 
-    std::cerr<<"insert copy iterator range test 2.\n";
+    std::cerr << "insert copy iterator range test 2.\n";
 
     {
         test::check_instances check_;
@@ -287,11 +295,53 @@ void insert_tests2(X*, test::random_generator generator)
 
         test::random_values<X> v1(500, generator);
         test::random_values<X> v2(500, generator);
-        x.insert(test::copy_iterator(v1.begin()), test::copy_iterator(v1.end()));
-        x.insert(test::copy_iterator(v2.begin()), test::copy_iterator(v2.end()));
+        x.insert(
+            test::copy_iterator(v1.begin()), test::copy_iterator(v1.end()));
+        x.insert(
+            test::copy_iterator(v2.begin()), test::copy_iterator(v2.end()));
 
         test::check_equivalent_keys(x);
     }
+
+    std::cerr << "insert various ranges.\n";
+
+    {
+        for (int i = 0; i < 100; ++i) {
+            X x;
+            test::ordered<X> tracker = test::create_ordered(x);
+
+            test::random_values<X> v(1000, generator);
+
+            for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                     v.begin();
+                 it != v.end();) {
+                BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                    x.bucket_count();
+                float b = x.max_load_factor();
+
+                BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator next =
+                    it;
+                for (std::size_t j = test::random_value(20); j > 0; ++j) {
+                    ++next;
+                    if (next == v.end()) {
+                        break;
+                    }
+                }
+
+                x.insert(it, next);
+                tracker.insert(it, next);
+                it = next;
+
+                tracker.compare(x); // Slow, but I can't see any other way.
+
+                if (static_cast<double>(x.size()) <=
+                    b * static_cast<double>(old_bucket_count))
+                    BOOST_TEST(x.bucket_count() == old_bucket_count);
+            }
+
+            test::check_equivalent_keys(x);
+        }
+    }
 }
 
 template <class X>
@@ -300,79 +350,80 @@ void unique_emplace_tests1(X*, test::random_generator generator)
     typedef BOOST_DEDUCED_TYPENAME X::iterator iterator;
     typedef test::ordered<X> ordered;
 
-    std::cerr<<"emplace(value) tests for containers with unique keys.\n";
+    std::cerr << "emplace(value) tests for containers with unique keys.\n";
 
     X x;
     test::ordered<X> tracker = test::create_ordered(x);
 
     test::random_values<X> v(1000, generator);
 
-    for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
-            it != v.end(); ++it)
-    {
+    for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
+         it != v.end(); ++it) {
 
         BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count = x.bucket_count();
         float b = x.max_load_factor();
 
         std::pair<iterator, bool> r1 = x.emplace(*it);
-        std::pair<BOOST_DEDUCED_TYPENAME ordered::iterator, bool>
-            r2 = tracker.insert(*it);
+        std::pair<BOOST_DEDUCED_TYPENAME ordered::iterator, bool> r2 =
+            tracker.insert(*it);
 
         BOOST_TEST(r1.second == r2.second);
         BOOST_TEST(*r1.first == *r2.first);
 
         tracker.compare_key(x, *it);
 
-        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+        if (static_cast<double>(x.size()) <=
+            b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
+    tracker.compare(x);
     test::check_equivalent_keys(x);
 }
 
 template <class X>
 void equivalent_emplace_tests1(X*, test::random_generator generator)
 {
-    std::cerr<<"emplace(value) tests for containers with equivalent keys.\n";
+    std::cerr << "emplace(value) tests for containers with equivalent keys.\n";
 
     X x;
     test::ordered<X> tracker = test::create_ordered(x);
 
     test::random_values<X> v(1000, generator);
-    for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
-            it != v.end(); ++it)
-    {
+    for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
+         it != v.end(); ++it) {
         BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count = x.bucket_count();
         float b = x.max_load_factor();
 
         BOOST_DEDUCED_TYPENAME X::iterator r1 = x.emplace(*it);
-        BOOST_DEDUCED_TYPENAME test::ordered<X>::iterator
-            r2 = tracker.insert(*it);
+        BOOST_DEDUCED_TYPENAME test::ordered<X>::iterator r2 =
+            tracker.insert(*it);
 
         BOOST_TEST(*r1 == *r2);
 
         tracker.compare_key(x, *it);
 
-        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+        if (static_cast<double>(x.size()) <=
+            b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
+    tracker.compare(x);
     test::check_equivalent_keys(x);
 }
 
-template <class X>
-void move_emplace_tests(X*, test::random_generator generator)
+template <class X> void move_emplace_tests(X*, test::random_generator generator)
 {
-    std::cerr<<"emplace(move(value)) tests for containers with unique keys.\n";
+    std::cerr
+        << "emplace(move(value)) tests for containers with unique keys.\n";
 
     X x;
     test::ordered<X> tracker = test::create_ordered(x);
 
     test::random_values<X> v(1000, generator);
 
-    for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
-            it != v.end(); ++it)
-    {
+    for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
+         it != v.end(); ++it) {
 
         BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count = x.bucket_count();
         float b = x.max_load_factor();
@@ -382,18 +433,19 @@ void move_emplace_tests(X*, test::random_generator generator)
         tracker.insert(*it);
         tracker.compare_key(x, *it);
 
-        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+        if (static_cast<double>(x.size()) <=
+            b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
-    test::check_equivalent_keys(x);
     tracker.compare(x);
+    test::check_equivalent_keys(x);
 }
 
-template <class X>
-void default_emplace_tests(X*, test::random_generator)
+template <class X> void default_emplace_tests(X*, test::random_generator)
 {
-    std::cerr<<"emplace() tests.\n";
+#if !BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x5100))
+    std::cerr << "emplace() tests.\n";
     bool is_unique = test::has_unique_keys<X>::value;
 
     X x;
@@ -401,42 +453,41 @@ void default_emplace_tests(X*, test::random_generator)
     x.emplace();
     BOOST_TEST(x.size() == 1);
     x.emplace();
-    BOOST_TEST(x.size() == is_unique ? 1: 2);
+    BOOST_TEST(x.size() == (is_unique ? 1u : 2u));
     x.emplace();
-    BOOST_TEST(x.size() == is_unique ? 1: 3);
-    
+    BOOST_TEST(x.size() == (is_unique ? 1u : 3u));
+
     typename X::value_type y;
-    BOOST_TEST(x.count(test::get_key<X>(y)) ==  is_unique ? 1: 3);
+    BOOST_TEST(x.count(test::get_key<X>(y)) == (is_unique ? 1u : 3u));
     BOOST_TEST(*x.equal_range(test::get_key<X>(y)).first == y);
 
     x.emplace(y);
-    BOOST_TEST(x.size() ==  is_unique ? 1: 4);
-    BOOST_TEST(x.count(test::get_key<X>(y)) ==  is_unique ? 1: 4);
+    BOOST_TEST(x.size() == (is_unique ? 1u : 4u));
+    BOOST_TEST(x.count(test::get_key<X>(y)) == (is_unique ? 1u : 4u));
     BOOST_TEST(*x.equal_range(test::get_key<X>(y)).first == y);
-    
+
     x.clear();
     BOOST_TEST(x.empty());
     x.emplace(y);
     BOOST_TEST(x.size() == 1);
     x.emplace(y);
-    BOOST_TEST(x.size() == is_unique ? 1: 2);
-    
-    BOOST_TEST(x.count(test::get_key<X>(y)) == is_unique ? 1: 2);
+    BOOST_TEST(x.size() == (is_unique ? 1u : 2u));
+
+    BOOST_TEST(x.count(test::get_key<X>(y)) == (is_unique ? 1u : 2u));
     BOOST_TEST(*x.equal_range(test::get_key<X>(y)).first == y);
+#endif
 }
 
-template <class X>
-void map_tests(X*, test::random_generator generator)
+template <class X> void map_tests(X*, test::random_generator generator)
 {
-    std::cerr<<"map tests.\n";
+    std::cerr << "map tests.\n";
 
     X x;
     test::ordered<X> tracker = test::create_ordered(x);
 
     test::random_values<X> v(1000, generator);
-    for(BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
-            it != v.end(); ++it)
-    {
+    for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it = v.begin();
+         it != v.end(); ++it) {
         BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count = x.bucket_count();
         float b = x.max_load_factor();
 
@@ -445,11 +496,310 @@ void map_tests(X*, test::random_generator generator)
 
         tracker.compare_key(x, *it);
 
-        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
+        if (static_cast<double>(x.size()) <=
+            b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
-    test::check_equivalent_keys(x);   
+    tracker.compare(x);
+    test::check_equivalent_keys(x);
+}
+
+template <class X> void map_tests2(X*, test::random_generator generator)
+{
+    typedef BOOST_DEDUCED_TYPENAME X::iterator iterator;
+    std::cerr << "insert_or_assign\n";
+
+    {
+        test::check_instances check_;
+
+        X x;
+        test::ordered<X> tracker = test::create_ordered(x);
+
+        test::random_values<X> v(1000, generator);
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
+            float b = x.max_load_factor();
+
+            std::pair<iterator, bool> r =
+                x.insert_or_assign(it->first, it->second);
+            BOOST_TEST(*r.first == *it);
+
+            tracker[it->first] = it->second;
+            tracker.compare_key(x, *it);
+
+            if (static_cast<double>(x.size()) <
+                b * static_cast<double>(old_bucket_count))
+                BOOST_TEST(x.bucket_count() == old_bucket_count);
+        }
+
+        tracker.compare(x);
+        test::check_equivalent_keys(x);
+    }
+
+    std::cerr << "insert_or_assign(begin)\n";
+
+    {
+        test::check_instances check_;
+
+        X x;
+        test::ordered<X> tracker = test::create_ordered(x);
+
+        test::random_values<X> v(1000, generator);
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
+            float b = x.max_load_factor();
+
+            iterator r = x.insert_or_assign(x.begin(), it->first, it->second);
+            BOOST_TEST(*r == *it);
+
+            tracker[it->first] = it->second;
+            tracker.compare_key(x, *it);
+
+            if (static_cast<double>(x.size()) <
+                b * static_cast<double>(old_bucket_count))
+                BOOST_TEST(x.bucket_count() == old_bucket_count);
+        }
+
+        tracker.compare(x);
+        test::check_equivalent_keys(x);
+    }
+
+    std::cerr << "insert_or_assign(end)\n";
+
+    {
+        test::check_instances check_;
+
+        X x;
+        test::ordered<X> tracker = test::create_ordered(x);
+
+        test::random_values<X> v(1000, generator);
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
+            float b = x.max_load_factor();
+
+            iterator r = x.insert_or_assign(x.end(), it->first, it->second);
+            BOOST_TEST(*r == *it);
+
+            tracker[it->first] = it->second;
+            tracker.compare_key(x, *it);
+
+            if (static_cast<double>(x.size()) <
+                b * static_cast<double>(old_bucket_count))
+                BOOST_TEST(x.bucket_count() == old_bucket_count);
+        }
+
+        tracker.compare(x);
+        test::check_equivalent_keys(x);
+    }
+
+    std::cerr << "insert_or_assign(last)\n";
+
+    {
+        test::check_instances check_;
+
+        X x;
+        test::ordered<X> tracker = test::create_ordered(x);
+        iterator last = x.begin();
+
+        test::random_values<X> v(1000, generator);
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
+            float b = x.max_load_factor();
+
+            iterator r = x.insert_or_assign(last, it->first, it->second);
+            BOOST_TEST(*r == *it);
+
+            tracker[it->first] = it->second;
+            tracker.compare_key(x, *it);
+
+            if (static_cast<double>(x.size()) <
+                b * static_cast<double>(old_bucket_count))
+                BOOST_TEST(x.bucket_count() == old_bucket_count);
+
+            last = r;
+        }
+
+        tracker.compare(x);
+        test::check_equivalent_keys(x);
+    }
+}
+
+template <class X> void try_emplace_tests(X*, test::random_generator generator)
+{
+    std::cerr << "try_emplace(key, value)\n";
+
+    typedef BOOST_DEDUCED_TYPENAME X::iterator iterator;
+
+    {
+        test::check_instances check_;
+
+        X x;
+        test::ordered<X> tracker = test::create_ordered(x);
+
+        test::random_values<X> v(1000, generator);
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
+            float b = x.max_load_factor();
+
+            iterator pos = x.find(it->first);
+            bool found = pos != x.end();
+
+            std::pair<typename X::iterator, bool> r =
+                x.try_emplace(it->first, it->second);
+            if (found) {
+                BOOST_TEST(pos == r.first);
+                BOOST_TEST(!r.second);
+            } else {
+                BOOST_TEST(r.second);
+            }
+            BOOST_TEST_EQ(r.first->first, it->first);
+            BOOST_TEST_EQ(r.first->second, it->second);
+
+            tracker.insert(*it);
+            tracker.compare_key(x, *it);
+
+            if (static_cast<double>(x.size()) <
+                b * static_cast<double>(old_bucket_count))
+                BOOST_TEST(x.bucket_count() == old_bucket_count);
+        }
+
+        test::check_equivalent_keys(x);
+    }
+
+    std::cerr << "try_emplace(begin(), key, value)\n";
+
+    typedef BOOST_DEDUCED_TYPENAME X::iterator iterator;
+
+    {
+        test::check_instances check_;
+
+        X x;
+        test::ordered<X> tracker = test::create_ordered(x);
+
+        test::random_values<X> v(1000, generator);
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
+            float b = x.max_load_factor();
+
+            iterator pos = x.find(it->first);
+            bool found = pos != x.end();
+
+            typename X::iterator r =
+                x.try_emplace(r.begin(), it->first, it->second);
+            if (found) {
+                BOOST_TEST(pos == r);
+            }
+            BOOST_TEST_EQ(r->first, it->first);
+            BOOST_TEST_EQ(r->second, it->second);
+
+            tracker.insert(*it);
+            tracker.compare_key(x, *it);
+
+            if (static_cast<double>(x.size()) <
+                b * static_cast<double>(old_bucket_count))
+                BOOST_TEST(x.bucket_count() == old_bucket_count);
+        }
+
+        test::check_equivalent_keys(x);
+    }
+
+    std::cerr << "try_emplace(end(), key, value)\n";
+
+    typedef BOOST_DEDUCED_TYPENAME X::iterator iterator;
+
+    {
+        test::check_instances check_;
+
+        X x;
+        test::ordered<X> tracker = test::create_ordered(x);
+
+        test::random_values<X> v(1000, generator);
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
+            float b = x.max_load_factor();
+
+            iterator pos = x.find(it->first);
+            bool found = pos != x.end();
+
+            typename X::iterator r =
+                x.try_emplace(r.end(), it->first, it->second);
+            if (found) {
+                BOOST_TEST(pos == r);
+            }
+            BOOST_TEST_EQ(r->first, it->first);
+            BOOST_TEST_EQ(r->second, it->second);
+
+            tracker.insert(*it);
+            tracker.compare_key(x, *it);
+
+            if (static_cast<double>(x.size()) <
+                b * static_cast<double>(old_bucket_count))
+                BOOST_TEST(x.bucket_count() == old_bucket_count);
+        }
+
+        test::check_equivalent_keys(x);
+    }
+
+    std::cerr << "try_emplace(pos, key, value)\n";
+
+    typedef BOOST_DEDUCED_TYPENAME X::iterator iterator;
+
+    {
+        test::check_instances check_;
+
+        X x;
+        test::ordered<X> tracker = test::create_ordered(x);
+
+        test::random_values<X> v(1000, generator);
+        for (BOOST_DEDUCED_TYPENAME test::random_values<X>::iterator it =
+                 v.begin();
+             it != v.end(); ++it) {
+            BOOST_DEDUCED_TYPENAME X::size_type old_bucket_count =
+                x.bucket_count();
+            float b = x.max_load_factor();
+
+            iterator pos = x.find(it->first);
+            bool found = pos != x.end();
+
+            typename X::iterator r = x.try_emplace(pos, it->first, it->second);
+            if (found) {
+                BOOST_TEST(pos == r);
+            }
+            BOOST_TEST_EQ(r->first, it->first);
+            BOOST_TEST_EQ(r->second, it->second);
+
+            tracker.insert(*it);
+            tracker.compare_key(x, *it);
+
+            if (static_cast<double>(x.size()) <
+                b * static_cast<double>(old_bucket_count))
+                BOOST_TEST(x.bucket_count() == old_bucket_count);
+        }
+
+        test::check_equivalent_keys(x);
+    }
 }
 
 // Some tests for when the range's value type doesn't match the container's
@@ -458,20 +808,18 @@ void map_tests(X*, test::random_generator generator)
 template <class X>
 void map_insert_range_test1(X*, test::random_generator generator)
 {
-    std::cerr<<"map_insert_range_test1\n";
+    std::cerr << "map_insert_range_test1\n";
 
     test::check_instances check_;
 
-    typedef test::list<
-        std::pair<
-            BOOST_DEDUCED_TYPENAME X::key_type,
-            BOOST_DEDUCED_TYPENAME X::mapped_type
-        >
-    > list;
+    typedef test::list<std::pair<BOOST_DEDUCED_TYPENAME X::key_type,
+        BOOST_DEDUCED_TYPENAME X::mapped_type> >
+        list;
     test::random_values<X> v(1000, generator);
     list l(v.begin(), v.end());
 
-    X x; x.insert(l.begin(), l.end());
+    X x;
+    x.insert(l.begin(), l.end());
 
     test::check_equivalent_keys(x);
 }
@@ -479,97 +827,86 @@ void map_insert_range_test1(X*, test::random_generator generator)
 template <class X>
 void map_insert_range_test2(X*, test::random_generator generator)
 {
-    std::cerr<<"map_insert_range_test2\n";
+    std::cerr << "map_insert_range_test2\n";
 
     test::check_instances check_;
 
-    typedef test::list<
-        std::pair<BOOST_DEDUCED_TYPENAME X::key_type const, test::implicitly_convertible>
-    > list;
-    test::random_values<
-        boost::unordered_map<BOOST_DEDUCED_TYPENAME X::key_type, test::implicitly_convertible>
-    > v(1000, generator);
+    typedef test::list<std::pair<BOOST_DEDUCED_TYPENAME X::key_type const,
+        test::implicitly_convertible> >
+        list;
+    test::random_values<boost::unordered_map<BOOST_DEDUCED_TYPENAME X::key_type,
+        test::implicitly_convertible> >
+        v(1000, generator);
     list l(v.begin(), v.end());
 
-    X x; x.insert(l.begin(), l.end());
+    X x;
+    x.insert(l.begin(), l.end());
 
     test::check_equivalent_keys(x);
 }
 
-boost::unordered_set<test::movable,
-    test::hash, test::equal_to,
+boost::unordered_set<test::movable, test::hash, test::equal_to,
     std::allocator<test::movable> >* test_set_std_alloc;
-boost::unordered_multimap<test::object, test::object,
-    test::hash, test::equal_to,
-    std::allocator<test::object> >* test_multimap_std_alloc;
+boost::unordered_multimap<test::object, test::object, test::hash,
+    test::equal_to, std::allocator<test::object> >* test_multimap_std_alloc;
 
-boost::unordered_set<test::object,
-    test::hash, test::equal_to,
+boost::unordered_set<test::object, test::hash, test::equal_to,
     test::allocator1<test::object> >* test_set;
-boost::unordered_multiset<test::movable,
-    test::hash, test::equal_to,
+boost::unordered_multiset<test::movable, test::hash, test::equal_to,
     test::allocator2<test::movable> >* test_multiset;
-boost::unordered_map<test::movable, test::movable,
-    test::hash, test::equal_to,
+boost::unordered_map<test::movable, test::movable, test::hash, test::equal_to,
     test::allocator2<test::movable> >* test_map;
-boost::unordered_multimap<test::object, test::object,
-    test::hash, test::equal_to,
-    test::allocator1<test::object> >* test_multimap;
+boost::unordered_multimap<test::object, test::object, test::hash,
+    test::equal_to, test::allocator1<test::object> >* test_multimap;
 
 using test::default_generator;
 using test::generate_collisions;
+using test::limited_range;
 
 UNORDERED_TEST(unique_insert_tests1,
-    ((test_set_std_alloc)(test_set)(test_map))
-    ((default_generator)(generate_collisions))
-)
+    ((test_set_std_alloc)(test_set)(test_map))(
+                   (default_generator)(generate_collisions)(limited_range)))
 
 UNORDERED_TEST(equivalent_insert_tests1,
-    ((test_multimap_std_alloc)(test_multiset)(test_multimap))
-    ((default_generator)(generate_collisions))
-)
+    ((test_multimap_std_alloc)(test_multiset)(test_multimap))(
+                   (default_generator)(generate_collisions)(limited_range)))
 
-UNORDERED_TEST(insert_tests2,
-    ((test_multimap_std_alloc)(test_set)(test_multiset)(test_map)(test_multimap))
-    ((default_generator)(generate_collisions))
-)
+UNORDERED_TEST(
+    insert_tests2, ((test_multimap_std_alloc)(test_set)(test_multiset)(
+                       test_map)(test_multimap))(
+                       (default_generator)(generate_collisions)(limited_range)))
 
 UNORDERED_TEST(unique_emplace_tests1,
-    ((test_set_std_alloc)(test_set)(test_map))
-    ((default_generator)(generate_collisions))
-)
+    ((test_set_std_alloc)(test_set)(test_map))(
+                   (default_generator)(generate_collisions)(limited_range)))
 
 UNORDERED_TEST(equivalent_emplace_tests1,
-    ((test_multimap_std_alloc)(test_multiset)(test_multimap))
-    ((default_generator)(generate_collisions))
-)
+    ((test_multimap_std_alloc)(test_multiset)(test_multimap))(
+                   (default_generator)(generate_collisions)(limited_range)))
 
 UNORDERED_TEST(move_emplace_tests,
-    ((test_set_std_alloc)(test_multimap_std_alloc)(test_set)(test_map)
-        (test_multiset)(test_multimap))
-    ((default_generator)(generate_collisions))
-)
+    ((test_set_std_alloc)(test_multimap_std_alloc)(test_set)(test_map)(
+        test_multiset)(test_multimap))(
+                   (default_generator)(generate_collisions)(limited_range)))
 
 UNORDERED_TEST(default_emplace_tests,
-    ((test_set_std_alloc)(test_multimap_std_alloc)(test_set)(test_map)
-        (test_multiset)(test_multimap))
-    ((default_generator)(generate_collisions))
-)
+    ((test_set_std_alloc)(test_multimap_std_alloc)(test_set)(test_map)(
+        test_multiset)(test_multimap))(
+                   (default_generator)(generate_collisions)(limited_range)))
 
 UNORDERED_TEST(map_tests,
-    ((test_map))
-    ((default_generator)(generate_collisions))
-)
+    ((test_map))((default_generator)(generate_collisions)(limited_range)))
+
+UNORDERED_TEST(
+    map_tests2, ((test_map))((default_generator)(generate_collisions)))
 
 UNORDERED_TEST(map_insert_range_test1,
-    ((test_multimap_std_alloc)(test_map)(test_multimap))
-    ((default_generator)(generate_collisions))
-)
+    ((test_multimap_std_alloc)(test_map)(test_multimap))(
+                   (default_generator)(generate_collisions)(limited_range)))
 
 UNORDERED_TEST(map_insert_range_test2,
-    ((test_multimap_std_alloc)(test_map)(test_multimap))
-    ((default_generator)(generate_collisions))
-)
+    ((test_multimap_std_alloc)(test_map)(test_multimap))(
+                   (default_generator)(generate_collisions)(limited_range)))
 
 #if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
 
@@ -579,7 +916,7 @@ struct initialize_from_two_ints
 
     friend std::size_t hash_value(initialize_from_two_ints const& x)
     {
-        return x.a + x.b;
+        return static_cast<std::size_t>(x.a + x.b);
     }
 
     bool operator==(initialize_from_two_ints const& x) const
@@ -591,7 +928,7 @@ struct initialize_from_two_ints
 UNORDERED_AUTO_TEST(insert_initializer_list_set)
 {
     boost::unordered_set<int> set;
-    set.insert({1,2,3,1});
+    set.insert({1, 2, 3, 1});
     BOOST_TEST_EQ(set.size(), 3u);
     BOOST_TEST(set.find(1) != set.end());
     BOOST_TEST(set.find(4) == set.end());
@@ -604,25 +941,25 @@ UNORDERED_AUTO_TEST(insert_initializer_list_set)
     set2.insert({1, 2});
 #endif
     BOOST_TEST(set2.size() == 1);
-    BOOST_TEST(set2.find({1,2}) != set2.end());
-    BOOST_TEST(set2.find({2,1}) == set2.end());
+    BOOST_TEST(set2.find({1, 2}) != set2.end());
+    BOOST_TEST(set2.find({2, 1}) == set2.end());
 
-    set2.insert({{3,4},{5,6},{7,8}});
+    set2.insert({{3, 4}, {5, 6}, {7, 8}});
     BOOST_TEST(set2.size() == 4);
-    BOOST_TEST(set2.find({1,2}) != set2.end());
-    BOOST_TEST(set2.find({3,4}) != set2.end());
-    BOOST_TEST(set2.find({5,6}) != set2.end());
-    BOOST_TEST(set2.find({7,8}) != set2.end());
-    BOOST_TEST(set2.find({8,7}) == set2.end());
+    BOOST_TEST(set2.find({1, 2}) != set2.end());
+    BOOST_TEST(set2.find({3, 4}) != set2.end());
+    BOOST_TEST(set2.find({5, 6}) != set2.end());
+    BOOST_TEST(set2.find({7, 8}) != set2.end());
+    BOOST_TEST(set2.find({8, 7}) == set2.end());
 
-    set2.insert({{2, 1}, {3,4}});
+    set2.insert({{2, 1}, {3, 4}});
     BOOST_TEST(set2.size() == 5);
-    BOOST_TEST(set2.find({1,2}) != set2.end());
-    BOOST_TEST(set2.find({2,1}) != set2.end());
-    BOOST_TEST(set2.find({3,4}) != set2.end());
-    BOOST_TEST(set2.find({5,6}) != set2.end());
-    BOOST_TEST(set2.find({7,8}) != set2.end());
-    BOOST_TEST(set2.find({8,7}) == set2.end());
+    BOOST_TEST(set2.find({1, 2}) != set2.end());
+    BOOST_TEST(set2.find({2, 1}) != set2.end());
+    BOOST_TEST(set2.find({3, 4}) != set2.end());
+    BOOST_TEST(set2.find({5, 6}) != set2.end());
+    BOOST_TEST(set2.find({7, 8}) != set2.end());
+    BOOST_TEST(set2.find({8, 7}) == set2.end());
 }
 
 #if !BOOST_WORKAROUND(BOOST_MSVC, == 1800)
@@ -630,13 +967,13 @@ UNORDERED_AUTO_TEST(insert_initializer_list_set)
 UNORDERED_AUTO_TEST(insert_initializer_list_multiset)
 {
     boost::unordered_multiset<std::string> multiset;
-    //multiset.insert({});
+    // multiset.insert({});
     BOOST_TEST(multiset.empty());
     multiset.insert({"a"});
     BOOST_TEST_EQ(multiset.size(), 1u);
     BOOST_TEST(multiset.find("a") != multiset.end());
     BOOST_TEST(multiset.find("b") == multiset.end());
-    multiset.insert({"a","b"});
+    multiset.insert({"a", "b"});
     BOOST_TEST(multiset.size() == 3);
     BOOST_TEST_EQ(multiset.count("a"), 2u);
     BOOST_TEST_EQ(multiset.count("b"), 1u);
@@ -648,18 +985,18 @@ UNORDERED_AUTO_TEST(insert_initializer_list_multiset)
 UNORDERED_AUTO_TEST(insert_initializer_list_map)
 {
     boost::unordered_map<std::string, std::string> map;
-    //map.insert({});
+    // map.insert({});
     BOOST_TEST(map.empty());
-    map.insert({{"a", "b"},{"a", "b"},{"d", ""}});
+    map.insert({{"a", "b"}, {"a", "b"}, {"d", ""}});
     BOOST_TEST_EQ(map.size(), 2u);
 }
 
 UNORDERED_AUTO_TEST(insert_initializer_list_multimap)
 {
     boost::unordered_multimap<std::string, std::string> multimap;
-    //multimap.insert({});
+    // multimap.insert({});
     BOOST_TEST(multimap.empty());
-    multimap.insert({{"a", "b"},{"a", "b"},{"d", ""}});
+    multimap.insert({{"a", "b"}, {"a", "b"}, {"d", ""}});
     BOOST_TEST_EQ(multimap.size(), 3u);
     BOOST_TEST_EQ(multimap.count("a"), 2u);
 }
@@ -669,15 +1006,17 @@ UNORDERED_AUTO_TEST(insert_initializer_list_multimap)
 struct overloaded_constructor
 {
     overloaded_constructor(int x1_ = 1, int x2_ = 2, int x3_ = 3, int x4_ = 4)
-      : x1(x1_), x2(x2_), x3(x3_), x4(x4_) {}
+        : x1(x1_), x2(x2_), x3(x3_), x4(x4_)
+    {
+    }
 
     int x1, x2, x3, x4;
-    
+
     bool operator==(overloaded_constructor const& rhs) const
     {
         return x1 == rhs.x1 && x2 == rhs.x2 && x3 == rhs.x3 && x4 == rhs.x4;
     }
-    
+
     friend std::size_t hash_value(overloaded_constructor const& x)
     {
         std::size_t hash = 0;
@@ -695,13 +1034,17 @@ UNORDERED_AUTO_TEST(map_emplace_test)
 
 #if !BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x5100))
     x.emplace();
-    BOOST_TEST(x.find(0) != x.end() &&
-        x.find(0)->second == overloaded_constructor());
+    BOOST_TEST(
+        x.find(0) != x.end() && x.find(0)->second == overloaded_constructor());
 #endif
 
     x.emplace(2, 3);
-    BOOST_TEST(x.find(2) != x.end() &&
-        x.find(2)->second == overloaded_constructor(3));
+    BOOST_TEST(
+        x.find(2) != x.end() && x.find(2)->second == overloaded_constructor(3));
+
+    x.try_emplace(5);
+    BOOST_TEST(
+        x.find(5) != x.end() && x.find(5)->second == overloaded_constructor());
 }
 
 UNORDERED_AUTO_TEST(set_emplace_test)
@@ -735,15 +1078,20 @@ UNORDERED_AUTO_TEST(set_emplace_test)
     BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);
 }
 
-struct derived_from_piecewise_construct_t :
-    boost::unordered::piecewise_construct_t {};
+struct derived_from_piecewise_construct_t
+    : boost::unordered::piecewise_construct_t
+{
+};
 
-derived_from_piecewise_construct_t piecewise_rvalue() {
+derived_from_piecewise_construct_t piecewise_rvalue()
+{
     return derived_from_piecewise_construct_t();
 }
 
-struct convertible_to_piecewise {
-    operator boost::unordered::piecewise_construct_t() const {
+struct convertible_to_piecewise
+{
+    operator boost::unordered::piecewise_construct_t() const
+    {
         return boost::unordered::piecewise_construct;
     }
 };
@@ -752,38 +1100,67 @@ UNORDERED_AUTO_TEST(map_emplace_test2)
 {
     boost::unordered_map<overloaded_constructor, overloaded_constructor> x;
 
-    x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(), boost::make_tuple());
-    BOOST_TEST(x.find(overloaded_constructor()) != x.end() &&
+    x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(),
+        boost::make_tuple());
+    BOOST_TEST(
+        x.find(overloaded_constructor()) != x.end() &&
         x.find(overloaded_constructor())->second == overloaded_constructor());
 
-    x.emplace(convertible_to_piecewise(), boost::make_tuple(1), boost::make_tuple());
-    BOOST_TEST(x.find(overloaded_constructor(1)) != x.end() &&
+    x.emplace(
+        convertible_to_piecewise(), boost::make_tuple(1), boost::make_tuple());
+    BOOST_TEST(
+        x.find(overloaded_constructor(1)) != x.end() &&
         x.find(overloaded_constructor(1))->second == overloaded_constructor());
 
-    x.emplace(piecewise_rvalue(), boost::make_tuple(2,3), boost::make_tuple(4,5,6));
-    BOOST_TEST(x.find(overloaded_constructor(2,3)) != x.end() &&
-        x.find(overloaded_constructor(2,3))->second == overloaded_constructor(4,5,6));
+    x.emplace(piecewise_rvalue(), boost::make_tuple(2, 3),
+        boost::make_tuple(4, 5, 6));
+    BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
+               x.find(overloaded_constructor(2, 3))->second ==
+                   overloaded_constructor(4, 5, 6));
 
     derived_from_piecewise_construct_t d;
-    x.emplace(d, boost::make_tuple(9,3,1), boost::make_tuple(10));
-    BOOST_TEST(x.find(overloaded_constructor(9,3,1)) != x.end() &&
-        x.find(overloaded_constructor(9,3,1))->second == overloaded_constructor(10));
+    x.emplace(d, boost::make_tuple(9, 3, 1), boost::make_tuple(10));
+    BOOST_TEST(x.find(overloaded_constructor(9, 3, 1)) != x.end() &&
+               x.find(overloaded_constructor(9, 3, 1))->second ==
+                   overloaded_constructor(10));
+
+    x.clear();
+
+    x.try_emplace(overloaded_constructor());
+    BOOST_TEST(
+        x.find(overloaded_constructor()) != x.end() &&
+        x.find(overloaded_constructor())->second == overloaded_constructor());
+
+    x.try_emplace(1);
+    BOOST_TEST(
+        x.find(overloaded_constructor(1)) != x.end() &&
+        x.find(overloaded_constructor(1))->second == overloaded_constructor());
+
+    x.try_emplace(overloaded_constructor(2, 3), 4, 5, 6);
+    BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
+               x.find(overloaded_constructor(2, 3))->second ==
+                   overloaded_constructor(4, 5, 6));
 }
 
 UNORDERED_AUTO_TEST(set_emplace_test2)
 {
-    boost::unordered_set<std::pair<overloaded_constructor, overloaded_constructor> > x;
+    boost::unordered_set<
+        std::pair<overloaded_constructor, overloaded_constructor> >
+        x;
     std::pair<overloaded_constructor, overloaded_constructor> check;
 
-    x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(), boost::make_tuple());
+    x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(),
+        boost::make_tuple());
     BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);
 
     x.clear();
-    x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(1), boost::make_tuple(2,3));
-    check = std::make_pair(overloaded_constructor(1), overloaded_constructor(2, 3));;
+    x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(1),
+        boost::make_tuple(2, 3));
+    check =
+        std::make_pair(overloaded_constructor(1), overloaded_constructor(2, 3));
+    ;
     BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);
 }
-
 }
 
 RUN_TESTS()