Merge unordered from trunk.

- Avoid using operator& with the value type.
- More comments in headers.
- Remove old clang workaround.
- Adjust use of inline to make Borland a little happier.
- Avoid `-Wconversion` warnings.


[SVN r67663]

doc/Jamfile.v2

@@ -3,6 +3,9 @@
 # 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)
 
+using boostbook ;
+using quickbook ;
+
 path-constant images_location : ../ ;
 path-constant admonishment_location : ../../../../doc/src/images ;
 

include/boost/unordered/detail/buckets.hpp

@@ -64,7 +64,7 @@ namespace boost { namespace unordered_detail {
     inline void hash_buckets<A, G>::delete_node(node_ptr b)
     {
         node* raw_ptr = static_cast<node*>(&*b);
-        boost::unordered_detail::destroy(&raw_ptr->value());
+        boost::unordered_detail::destroy(raw_ptr->value_ptr());
         real_node_ptr n(node_alloc().address(*raw_ptr));
         node_alloc().destroy(n);
         node_alloc().deallocate(n, 1);

include/boost/unordered/detail/fwd.hpp

@@ -21,14 +21,14 @@
 
 // This header defines most of the classes used to implement the unordered
 // containers. It doesn't include the insert methods as they require a lot
-// of preprocessor metaprogramming - they are in insert.hpp
+// of preprocessor metaprogramming - they are in unique.hpp and equivalent.hpp.
 
 // Template parameters:
 //
 // H = Hash Function
 // P = Predicate
 // A = Value Allocator
-// G = Grouped/Ungrouped
+// G = Bucket group policy, 'grouped' or 'ungrouped'
 // E = Key Extractor
 
 #if !defined(BOOST_NO_RVALUE_REFERENCES) && !defined(BOOST_NO_VARIADIC_TEMPLATES)
@@ -90,7 +90,37 @@ namespace boost { namespace unordered_detail {
 #pragma warning(pop)
 #endif
 
+    ////////////////////////////////////////////////////////////////////////////
+    //
+    // This section implements buckets and nodes. Here's a rough
+    // inheritance diagram, to show how they pull together.
+    //
+    // For unordered_set/unordered_map:
+    //
+    // hash_bucket<A>
+    //     |
+    // ungrouped_node_base<A>     value_base<A::value_type>
+    //     |                            |
+    //     +--------------+-------------+
+    //                    |
+    //         hash_node<A, ungrouped>
+    //
+    // For unordered_multiset/unordered_multimap:
+    //
+    // hash_bucket<A>
+    //     |
+    // grouped_node_base<A>       value_base<A::value_type>
+    //     |                            |
+    //     +--------------+-------------+
+    //                    |
+    //         hash_node<A, grouped>
+
     // hash_bucket
+    //
+    // hash_bucket is used for both the buckets and as a base class for
+    // nodes. By using 'bucket_ptr' for 'node_ptr', 'next_' can point
+    // to either a bucket or a node. This is used later to implement a
+    // sentinel at the end of the bucket array.
     
     template <class A>
     class hash_bucket
@@ -109,6 +139,16 @@ namespace boost { namespace unordered_detail {
         hash_bucket() : next_() {}
     };
 
+    // In containers with equivalent keys (unordered_multimap and
+    // unordered_multiset) equivalent nodes are grouped together, in
+    // containers with unique keys (unordered_map and unordered_set)
+    // individual nodes are treated as groups of one. The following two
+    // classes implement the data structure.
+
+    // This is used for containers with unique keys. There are no groups
+    // so it doesn't add any extra members, and just treats individual
+    // nodes as groups of one.
+
     template <class A>
     struct ungrouped_node_base : hash_bucket<A> {
         typedef hash_bucket<A> bucket;
@@ -125,6 +165,10 @@ namespace boost { namespace unordered_detail {
         static void unlink_nodes(bucket& b, node_ptr end);
     };
 
+    // This is used for containers with equivalent keys. It implements a
+    // circular list running in the opposite direction to the linked
+    // list through the nodes.
+
     template <class A>
     struct grouped_node_base : hash_bucket<A>
     {
@@ -151,6 +195,10 @@ namespace boost { namespace unordered_detail {
         }
     };
 
+    // These two classes implement an easy way to pass around the node
+    // group policy classes without the messy template parameters.
+    // Whenever you see the template parameter 'G' it's one of these.
+
     struct ungrouped
     {
         template <class A>
@@ -167,6 +215,8 @@ namespace boost { namespace unordered_detail {
         };
     };
 
+    // The space used to store values in a node.
+
     template <class ValueType>
     struct value_base
     {
@@ -181,6 +231,9 @@ namespace boost { namespace unordered_detail {
         value_type& value() {
             return *(ValueType*) this;
         }
+        value_type* value_ptr() {
+            return (ValueType*) this;
+        }
     private:
         value_base& operator=(value_base const&);
     };
@@ -199,11 +252,20 @@ namespace boost { namespace unordered_detail {
         static value_type& get_value(node_ptr p) {
             return static_cast<hash_node&>(*p).value();
         }
+        static value_type* get_value_ptr(node_ptr p) {
+            return static_cast<hash_node&>(*p).value_ptr();
+        }
     private:
         hash_node& operator=(hash_node const&);
     };
 
+    ////////////////////////////////////////////////////////////////////////////
+    //
     // Iterator Base
+    //
+    // This is the iterator used internally, the external iterators are
+    // provided by lightweight wrappers (hash_iterator and
+    // hast_const_iterator) which provide the full iterator interface.
 
     template <class A, class G>
     class hash_iterator_base
@@ -248,12 +310,24 @@ namespace boost { namespace unordered_detail {
         }
     };
 
+    ////////////////////////////////////////////////////////////////////////////
+    //
+    // Now the main data structure:
+    //
+    // hash_buckets<A, G>     hash_buffered_functions<H, P>
+    //       |                            |
+    //       +-------------+--------------+
+    //                     |
+    //                hash_table<T>
+    //
+    // T is a class which contains typedefs for all the types we need.
+    
     // hash_buckets
     //
     // This is responsible for allocating and deallocating buckets and nodes.
     //
     // Notes:
-    // 1. For the sake exception safety the allocators themselves don't allocate
+    // 1. For the sake exception safety the consturctors don't allocate
     //    anything.
     // 2. It's the callers responsibility to allocate the buckets before calling
     //    any of the methods (other than getters and setters).
@@ -327,6 +401,17 @@ namespace boost { namespace unordered_detail {
         std::size_t delete_to_bucket_end(node_ptr begin);
     };
 
+    // Assigning and swapping the equality and hash function objects
+    // needs strong exception safety. To implement that normally we'd
+    // require one of them to be known to not throw and the other to
+    // guarantee strong exception safety. Unfortunately they both only
+    // have basic exception safety. So to acheive strong exception
+    // safety we have storage space for two copies, and assign the new
+    // copies to the unused space. Then switch to using that to use
+    // them. This is implemented in 'set_hash_functions' which
+    // atomically assigns the new function objects in a strongly
+    // exception safe manner.
+
     template <class H, class P> class set_hash_functions;
 
     template <class H, class P>
@@ -429,6 +514,12 @@ namespace boost { namespace unordered_detail {
         }
     };
 
+    // This implements almost all of the required functionality, apart
+    // from some things that are specific to containers with unique and
+    // equivalent keys which is implemented in hash_unique_table and
+    // hash_equivalent_table. See unique.hpp and equivalent.hpp for
+    // their declaration and implementation.
+
     template <class T>
     class hash_table : public T::buckets, public T::buffered_functions
     {
@@ -569,9 +660,13 @@ namespace boost { namespace unordered_detail {
             node_constructor&, std::size_t);
     };
 
-    // Iterator Access
+    ///////////////////////////////////////////////////////////////////
+    //
+    // Iterators
+
+    // iterator_access is used to access the internal iterator without
+    // making it publicly available.
 
-#if !defined(__clang__)
     class iterator_access
     {
     public:
@@ -582,30 +677,6 @@ namespace boost { namespace unordered_detail {
             return it.base_;
         }
     };
-#else
-    class iterator_access
-    {
-    public:
-        // Note: we access Iterator::base here, rather than in the function
-        // signature to work around a bug in the friend support of an
-        // early version of clang.
-
-        template <class Iterator>
-        struct base
-        {
-            typedef BOOST_DEDUCED_TYPENAME Iterator::base type;
-        };
-    
-        template <class Iterator>
-        static BOOST_DEDUCED_TYPENAME base<Iterator>::type const&
-            get(Iterator const& it)
-        {
-            return it.base_;
-        }
-    };
-#endif
-
-    // Iterators
 
     template <class A, class G> class hash_iterator;
     template <class A, class G> class hash_const_iterator;
@@ -644,7 +715,7 @@ namespace boost { namespace unordered_detail {
             return node::get_value(ptr_);
         }
         value_type* operator->() const {
-            return &node::get_value(ptr_);
+            return node::get_value_ptr(ptr_);
         }
         hash_local_iterator& operator++() {
             ptr_ = ptr_->next_; return *this;
@@ -694,7 +765,7 @@ namespace boost { namespace unordered_detail {
             return node::get_value(ptr_);
         }
         value_type const* operator->() const {
-            return &node::get_value(ptr_);
+            return node::get_value_ptr(ptr_);
         }
         hash_const_local_iterator& operator++() {
             ptr_ = ptr_->next_; return *this;
@@ -716,7 +787,7 @@ namespace boost { namespace unordered_detail {
         }
     };
 
-    // iterators
+    // Iterators
     //
     // all no throw
 
@@ -823,7 +894,12 @@ namespace boost { namespace unordered_detail {
         }
     };
 
+    ////////////////////////////////////////////////////////////////////////////
+    //
     // types
+    //
+    // This is used to convieniently pass around a container's typedefs
+    // without having 7 template parameters.
 
     template <class K, class V, class H, class P, class A, class E, class G>
     struct types

include/boost/unordered/detail/util.hpp

@@ -299,7 +299,7 @@ namespace boost { namespace unordered_detail {
 #if BOOST_WORKAROUND(__CODEGEARC__, BOOST_TESTED_AT(0x0613))
                 struct dummy { hash_node<Alloc, Grouped> x; };
 #endif
-                boost::unordered_detail::destroy(&node_->value());
+                boost::unordered_detail::destroy(node_->value_ptr());
             }
 
             if (node_constructed_)
@@ -322,7 +322,7 @@ namespace boost { namespace unordered_detail {
         }
         else {
             BOOST_ASSERT(node_constructed_ && value_constructed_);
-            boost::unordered_detail::destroy(&node_->value());
+            boost::unordered_detail::destroy(node_->value_ptr());
             value_constructed_ = false;
         }
     }

include/boost/unordered/unordered_map_fwd.hpp

@@ -24,13 +24,13 @@ namespace boost
         class A = std::allocator<std::pair<const K, T> > >
     class unordered_map;
     template <class K, class T, class H, class P, class A>
-    bool operator==(unordered_map<K, T, H, P, A> const&,
+    inline bool operator==(unordered_map<K, T, H, P, A> const&,
         unordered_map<K, T, H, P, A> const&);
     template <class K, class T, class H, class P, class A>
-    bool operator!=(unordered_map<K, T, H, P, A> const&,
+    inline bool operator!=(unordered_map<K, T, H, P, A> const&,
         unordered_map<K, T, H, P, A> const&);
     template <class K, class T, class H, class P, class A>
-    void swap(unordered_map<K, T, H, P, A>&,
+    inline void swap(unordered_map<K, T, H, P, A>&,
             unordered_map<K, T, H, P, A>&);
 
     template <class K,
@@ -40,13 +40,13 @@ namespace boost
         class A = std::allocator<std::pair<const K, T> > >
     class unordered_multimap;
     template <class K, class T, class H, class P, class A>
-    bool operator==(unordered_multimap<K, T, H, P, A> const&,
+    inline bool operator==(unordered_multimap<K, T, H, P, A> const&,
         unordered_multimap<K, T, H, P, A> const&);
     template <class K, class T, class H, class P, class A>
-    bool operator!=(unordered_multimap<K, T, H, P, A> const&,
+    inline bool operator!=(unordered_multimap<K, T, H, P, A> const&,
         unordered_multimap<K, T, H, P, A> const&);
     template <class K, class T, class H, class P, class A>
-    void swap(unordered_multimap<K, T, H, P, A>&,
+    inline void swap(unordered_multimap<K, T, H, P, A>&,
             unordered_multimap<K, T, H, P, A>&);
 }
 

include/boost/unordered/unordered_set_fwd.hpp

@@ -23,13 +23,13 @@ namespace boost
         class A = std::allocator<T> >
     class unordered_set;
     template <class T, class H, class P, class A>
-    bool operator==(unordered_set<T, H, P, A> const&,
+    inline bool operator==(unordered_set<T, H, P, A> const&,
         unordered_set<T, H, P, A> const&);
     template <class T, class H, class P, class A>
-    bool operator!=(unordered_set<T, H, P, A> const&,
+    inline bool operator!=(unordered_set<T, H, P, A> const&,
         unordered_set<T, H, P, A> const&);
     template <class T, class H, class P, class A>
-    void swap(unordered_set<T, H, P, A> &m1,
+    inline void swap(unordered_set<T, H, P, A> &m1,
             unordered_set<T, H, P, A> &m2);
 
     template <class T,
@@ -38,13 +38,13 @@ namespace boost
         class A = std::allocator<T> >
     class unordered_multiset;
     template <class T, class H, class P, class A>
-    bool operator==(unordered_multiset<T, H, P, A> const&,
+    inline bool operator==(unordered_multiset<T, H, P, A> const&,
         unordered_multiset<T, H, P, A> const&);
     template <class T, class H, class P, class A>
-    bool operator!=(unordered_multiset<T, H, P, A> const&,
+    inline bool operator!=(unordered_multiset<T, H, P, A> const&,
         unordered_multiset<T, H, P, A> const&);
     template <class T, class H, class P, class A>
-    void swap(unordered_multiset<T, H, P, A> &m1,
+    inline void swap(unordered_multiset<T, H, P, A> &m1,
             unordered_multiset<T, H, P, A> &m2);
 }
 

test/objects/minimal.hpp

@@ -26,6 +26,8 @@ namespace minimal
     class default_copy_constructible;
     class assignable;
 
+    struct ampersand_operator_used {};
+
     template <class T> class hash;
     template <class T> class equal_to;
     template <class T> class ptr;
@@ -63,6 +65,7 @@ namespace minimal
         copy_constructible_equality_comparable& operator=(
             copy_constructible_equality_comparable const&);
         copy_constructible_equality_comparable() {}
+        ampersand_operator_used operator&() const { return ampersand_operator_used(); }
     };
 
     bool operator==(
@@ -98,9 +101,11 @@ namespace minimal
         ~default_copy_constructible()
         {
         }
+
     private:
         default_copy_constructible& operator=(
             default_copy_constructible const&);
+        ampersand_operator_used operator&() const { return ampersand_operator_used(); }
     };
 
     class assignable
@@ -110,8 +115,11 @@ namespace minimal
         assignable(assignable const&) {}
         assignable& operator=(assignable const&) { return *this; }
         ~assignable() {}
+
     private:
         assignable() {}
+        // TODO: This messes up a concept check in the tests.
+        //ampersand_operator_used operator&() const { return ampersand_operator_used(); }
     };
 
     template <class T>
@@ -125,6 +133,8 @@ namespace minimal
         ~hash() {}
 
         std::size_t operator()(T const&) const { return 0; }
+    private:
+        ampersand_operator_used operator&() const { return ampersand_operator_used(); }
     };
 
     template <class T>
@@ -138,6 +148,8 @@ namespace minimal
         ~equal_to() {}
 
         bool operator()(T const&, T const&) const { return true; }
+    private:
+        ampersand_operator_used operator&() const { return ampersand_operator_used(); }
     };
 
     template <class T> class ptr;
@@ -182,6 +194,9 @@ namespace minimal
         bool operator>(const_ptr<T> const& x) const { return ptr_ > x.ptr_; }
         bool operator<=(const_ptr<T> const& x) const { return ptr_ <= x.ptr_; }
         bool operator>=(const_ptr<T> const& x) const { return ptr_ >= x.ptr_; }
+    private:
+        // TODO:
+        //ampersand_operator_used operator&() const { return ampersand_operator_used(); }
     };
 
     template <class T>
@@ -221,6 +236,9 @@ namespace minimal
         bool operator>(const_ptr const& x) const { return ptr_ > x.ptr_; }
         bool operator<=(const_ptr const& x) const { return ptr_ <= x.ptr_; }
         bool operator>=(const_ptr const& x) const { return ptr_ >= x.ptr_; }
+    private:
+        // TODO:
+        //ampersand_operator_used operator&() const { return ampersand_operator_used(); }
     };
 
     template <class T>
@@ -278,6 +296,8 @@ namespace minimal
 #else
     private: allocator& operator=(allocator const&);
 #endif
+    private:
+        ampersand_operator_used operator&() const { return ampersand_operator_used(); }
     };
 
     template <class T>

test/unordered/Jamfile.v2

@@ -9,8 +9,8 @@ project unordered-test/unordered
     : requirements
         <warnings>all
         <toolset>intel:<warnings>on
-        <toolset>gcc:<cxxflags>"-pedantic -Wstrict-aliasing -fstrict-aliasing -Wextra -Wsign-promo -Wunused-parameter"
+        <toolset>gcc:<cxxflags>"-pedantic -Wstrict-aliasing -fstrict-aliasing -Wextra -Wsign-promo -Wunused-parameter -Wconversion"
-        <toolset>darwin:<cxxflags>"-pedantic -Wstrict-aliasing -fstrict-aliasing -Wextra -Wsign-promo -Wunused-parameter"
+        <toolset>darwin:<cxxflags>"-pedantic -Wstrict-aliasing -fstrict-aliasing -Wextra -Wsign-promo -Wunused-parameter -Wconversion"
         <toolset>gcc:<define>_GLIBCXX_DEBUG
         #<toolset>darwin:<define>_GLIBCXX_DEBUG
         <toolset>msvc:<warnings-as-errors>on
@@ -30,7 +30,7 @@ test-suite unordered
         [ run equivalent_keys_tests.cpp ]
         [ run constructor_tests.cpp ]
         [ run copy_tests.cpp ]
-        [ run move_tests.cpp : : : <test-info>always_show_run_output ]
+        [ run move_tests.cpp ]
         [ run assign_tests.cpp ]
         [ run insert_tests.cpp ]
         [ run insert_stable_tests.cpp ]

test/unordered/fwd_map_test.cpp

@@ -7,37 +7,54 @@
 
 #include <boost/unordered/unordered_map_fwd.hpp>
 
-typedef boost::unordered_map<int, int> int_map;
+template <typename T>
-
+void call_swap(boost::unordered_map<T,T>& x,
-void call_swap(int_map& x, int_map& y) {
+    boost::unordered_map<T,T>& y)
+{
     swap(x,y);
 }
 
-bool call_equals(int_map& x, int_map& y) {
+template <typename T>
+bool call_equals(boost::unordered_map<T,T>& x,
+    boost::unordered_map<T,T>& y)
+{
     return x == y;
 }
 
-bool call_not_equals(int_map& x, int_map& y) {
+template <typename T>
+bool call_not_equals(boost::unordered_map<T,T>& x,
+    boost::unordered_map<T,T>& y)
+{
     return x != y;
 }
 
-typedef boost::unordered_multimap<int, int> int_multimap;
+template <typename T>
-
+void call_swap(boost::unordered_multimap<T,T>& x,
-void call_swap(int_multimap& x, int_multimap& y) {
+    boost::unordered_multimap<T,T>& y)
+{
     swap(x,y);
 }
 
-bool call_equals(int_multimap& x, int_multimap& y) {
+template <typename T>
+bool call_equals(boost::unordered_multimap<T,T>& x,
+    boost::unordered_multimap<T,T>& y)
+{
     return x == y;
 }
 
-bool call_not_equals(int_multimap& x, int_multimap& y) {
+template <typename T>
+bool call_not_equals(boost::unordered_multimap<T,T>& x,
+    boost::unordered_multimap<T,T>& y)
+{
     return x != y;
 }
 
 #include <boost/unordered_map.hpp>
 #include "../helpers/test.hpp"
 
+typedef boost::unordered_map<int, int> int_map;
+typedef boost::unordered_multimap<int, int> int_multimap;
+
 UNORDERED_AUTO_TEST(use_map_fwd_declared_function) {
     int_map x, y;
     x[1] = 2;

test/unordered/fwd_set_test.cpp

@@ -16,36 +16,53 @@ template <class Value, class Hash, class Pred, class Alloc>
 true_type is_unordered_set_impl(
         boost::unordered_set<Value, Hash, Pred, Alloc>*);
 
-typedef boost::unordered_set<int> int_set;
+template<typename T>
-
+void call_swap(boost::unordered_set<T>& x,
-void call_swap(int_set& x, int_set& y) {
+    boost::unordered_set<T>& y)
+{
     swap(x,y);
 }
 
-bool call_equals(int_set& x, int_set& y) {
+template<typename T>
+bool call_equals(boost::unordered_set<T>& x,
+    boost::unordered_set<T>& y)
+{
     return x == y;
 }
 
-bool call_not_equals(int_set& x, int_set& y) {
+template<typename T>
+bool call_not_equals(boost::unordered_set<T>& x,
+    boost::unordered_set<T>& y)
+{
     return x != y;
 }
 
-typedef boost::unordered_multiset<int> int_multiset;
+template<typename T>
-
+void call_swap(boost::unordered_multiset<T>& x,
-void call_swap(int_multiset& x, int_multiset& y) {
+    boost::unordered_multiset<T>& y)
+{
     swap(x,y);
 }
 
-bool call_equals(int_multiset& x, int_multiset& y) {
+template<typename T>
+bool call_equals(boost::unordered_multiset<T>& x,
+    boost::unordered_multiset<T>& y)
+{
     return x == y;
 }
 
-bool call_not_equals(int_multiset& x, int_multiset& y) {
+template<typename T>
+bool call_not_equals(boost::unordered_multiset<T>& x,
+    boost::unordered_multiset<T>& y)
+{
     return x != y;
 }
 
 #include "../helpers/test.hpp"
 
+typedef boost::unordered_set<int> int_set;
+typedef boost::unordered_multiset<int> int_multiset;
+
 UNORDERED_AUTO_TEST(use_fwd_declared_trait_without_definition) {
     BOOST_TEST(sizeof(is_unordered_set_impl((int_set*) 0))
         == sizeof(true_type));

test/unordered/insert_tests.cpp

@@ -52,7 +52,7 @@ void unique_insert_tests1(X*,
 
         tracker.compare_key(x, *it);
 
-        if(x.size() < b * old_bucket_count)
+        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
@@ -83,7 +83,7 @@ void equivalent_insert_tests1(X*,
 
         tracker.compare_key(x, *it);
 
-        if(x.size() < b * old_bucket_count)
+        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
@@ -118,7 +118,7 @@ void insert_tests2(X*,
             BOOST_TEST(*r1 == *r2);
             tracker.compare_key(x, *it);
 
-            if(x.size() < b * old_bucket_count)
+            if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
                 BOOST_TEST(x.bucket_count() == old_bucket_count);
         }
 
@@ -145,7 +145,7 @@ void insert_tests2(X*,
             BOOST_TEST(*r1 == *r2);
             tracker.compare_key(x, *it);
 
-            if(x.size() < b * old_bucket_count)
+            if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
                 BOOST_TEST(x.bucket_count() == old_bucket_count);
         }
 
@@ -172,7 +172,7 @@ void insert_tests2(X*,
             BOOST_TEST(*pos == *r2);
             tracker.compare_key(x, *it);
 
-            if(x.size() < b * old_bucket_count)
+            if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
                 BOOST_TEST(x.bucket_count() == old_bucket_count);
         }
 
@@ -197,7 +197,7 @@ void insert_tests2(X*,
             tracker.insert(*it);
             tracker.compare_key(x, *it);
 
-            if(x.size() < b * old_bucket_count)
+            if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
                 BOOST_TEST(x.bucket_count() == old_bucket_count);
         }
 
@@ -275,7 +275,7 @@ void unique_emplace_tests1(X*,
 
         tracker.compare_key(x, *it);
 
-        if(x.size() < b * old_bucket_count)
+        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
@@ -306,7 +306,7 @@ void equivalent_emplace_tests1(X*,
 
         tracker.compare_key(x, *it);
 
-        if(x.size() < b * old_bucket_count)
+        if(static_cast<double>(x.size()) < b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 
@@ -335,7 +335,7 @@ void map_tests(X*, test::random_generator generator = test::default_generator)
 
         tracker.compare_key(x, *it);
 
-        if(x.size() < b * 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/unordered/load_factor_tests.cpp

@@ -51,7 +51,7 @@ void insert_test(X*, float mlf,
         BOOST_DEDUCED_TYPENAME X::size_type old_size = x.size(),
                  old_bucket_count = x.bucket_count();
         x.insert(*it);
-        if(old_size + 1 < b * old_bucket_count)
+        if(static_cast<double>(old_size + 1) < b * static_cast<double>(old_bucket_count))
             BOOST_TEST(x.bucket_count() == old_bucket_count);
     }
 }

test/unordered/rehash_tests.cpp

@@ -19,7 +19,8 @@ test::seed_t seed(2974);
 template <class X>
 bool postcondition(X const& x, BOOST_DEDUCED_TYPENAME X::size_type n)
 {
-    return x.bucket_count() > x.size() / x.max_load_factor() &&
+    return static_cast<double>(x.bucket_count()) >
+        static_cast<double>(x.size()) / x.max_load_factor() &&
         x.bucket_count() >= n;
 }