diff --git a/hash/doc/Jamfile.v2 b/hash/doc/Jamfile.v2
index 8909a83..700ad8a 100644
--- a/hash/doc/Jamfile.v2
+++ b/hash/doc/Jamfile.v2
@@ -12,4 +12,15 @@ boostbook standalone : hash :
     <xsl:param>chunk.section.depth=2
     <xsl:param>generate.section.toc.level=2
     <xsl:param>toc.section.depth=1
-    <xsl:param>toc.max.depth=1 ;
+    <xsl:param>toc.max.depth=1
+
+    <dependency>css
+    <dependency>images
+    ;
+
+install css : [ glob $(BOOST_ROOT)/doc/src/*.css ]
+    : <location>html ;
+install images : [ glob $(BOOST_ROOT)/doc/src/images/*.png ]
+    : <location>html/images ;
+explicit css ;
+explicit images ;
diff --git a/hash/test/hash_float_test.hpp b/hash/test/hash_float_test.hpp
index 2fda7b8..7e698b1 100644
--- a/hash/test/hash_float_test.hpp
+++ b/hash/test/hash_float_test.hpp
@@ -29,12 +29,12 @@ void float_tests(char const* name, T* = 0)
     std::cerr<<"\n"
         <<"Testing " BOOST_STRINGIZE(HASH_NAMESPACE) "::hash<"<<name<<">\n"
         <<"\n"
-        <<"std::numeric_limits<T>::digits = "
-            <<std::numeric_limits<T>::digits<<"\n"
-        <<"std::numeric_limits<int>::digits = "
-            <<std::numeric_limits<int>::digits<<"\n"
-        <<"std::numeric_limits<std::size_t>::digits = "
-            <<std::numeric_limits<std::size_t>::digits<<"\n"
+        <<"boost::hash_detail::limits<T>::digits = "
+            <<boost::hash_detail::limits<T>::digits<<"\n"
+        <<"boost::hash_detail::limits<int>::digits = "
+            <<boost::hash_detail::limits<int>::digits<<"\n"
+        <<"boost::hash_detail::limits<std::size_t>::digits = "
+            <<boost::hash_detail::limits<std::size_t>::digits<<"\n"
         <<"\n"
         ;
 
@@ -55,11 +55,11 @@ void float_tests(char const* name, T* = 0)
 #if defined(__BORLANDC__)
     std::cerr<<"Not running infinity checks on Borland, as it causes it to crash.\n";
 #else
-    if(std::numeric_limits<T>::has_infinity) {
+    if(boost::hash_detail::limits<T>::has_infinity) {
         T infinity = -log(zero);
         T infinity2 = (T) 1. / zero;
         T infinity3 = (T) -1. / minus_zero;
-        T infinity4 = std::numeric_limits<T>::infinity();
+        T infinity4 = boost::hash_detail::limits<T>::infinity();
 
         T minus_infinity = log(zero);
         T minus_infinity2 = (T) -1. / zero;
@@ -89,26 +89,26 @@ void float_tests(char const* name, T* = 0)
 
         // This should really be 'has_denorm == denorm_present' but some
         // compilers don't have 'denorm_present'. See also a later use.
-        if(std::numeric_limits<T>::has_denorm) {
-            if(x1(std::numeric_limits<T>::denorm_min()) == x1(infinity)) {
+        if(boost::hash_detail::limits<T>::has_denorm) {
+            if(x1(boost::hash_detail::limits<T>::denorm_min()) == x1(infinity)) {
                 std::cerr<<"x1(denorm_min) == x1(infinity) == "<<x1(infinity)<<"\n";
             }
-            if(x1(std::numeric_limits<T>::denorm_min()) == x1(minus_infinity)) {
+            if(x1(boost::hash_detail::limits<T>::denorm_min()) == x1(minus_infinity)) {
                 std::cerr<<"x1(denorm_min) == x1(-infinity) == "<<x1(minus_infinity)<<"\n";
             }
         }
-        if(std::numeric_limits<T>::has_quiet_NaN) {
-            if(x1(std::numeric_limits<T>::quiet_NaN()) == x1(infinity)) {
+        if(boost::hash_detail::limits<T>::has_quiet_NaN) {
+            if(x1(boost::hash_detail::limits<T>::quiet_NaN()) == x1(infinity)) {
                 std::cerr<<"x1(quiet_NaN) == x1(infinity) == "<<x1(infinity)<<"\n";
             }
-            if(x1(std::numeric_limits<T>::quiet_NaN()) == x1(minus_infinity)) {
+            if(x1(boost::hash_detail::limits<T>::quiet_NaN()) == x1(minus_infinity)) {
                 std::cerr<<"x1(quiet_NaN) == x1(-infinity) == "<<x1(minus_infinity)<<"\n";
             }
         }
     }
 #endif
 
-    T max = (std::numeric_limits<T>::max)();
+    T max = (boost::hash_detail::limits<T>::max)();
     T half_max = max / 2;
     T quarter_max = max / 4;
     T three_quarter_max = max - quarter_max;
@@ -142,50 +142,50 @@ void float_tests(char const* name, T* = 0)
     BOOST_TEST(x1(v2) == HASH_NAMESPACE::hash_value(v2));
 #endif
 
-    BOOST_TEST(x1(std::numeric_limits<T>::epsilon()) ==
-            HASH_NAMESPACE::hash_value(std::numeric_limits<T>::epsilon()));
+    BOOST_TEST(x1(boost::hash_detail::limits<T>::epsilon()) ==
+            HASH_NAMESPACE::hash_value(boost::hash_detail::limits<T>::epsilon()));
 
-    BOOST_TEST(std::numeric_limits<T>::epsilon() != (T) 0);
-    if(x1(std::numeric_limits<T>::epsilon()) == x1((T) 0))
+    BOOST_TEST(boost::hash_detail::limits<T>::epsilon() != (T) 0);
+    if(x1(boost::hash_detail::limits<T>::epsilon()) == x1((T) 0))
         std::cerr<<"x1(epsilon) == x1(0) == "<<x1((T) 0)<<"\n";
 
-    BOOST_TEST(-std::numeric_limits<T>::epsilon() != (T) 0);
-    if(x1(-std::numeric_limits<T>::epsilon()) == x1((T) 0))
+    BOOST_TEST(-boost::hash_detail::limits<T>::epsilon() != (T) 0);
+    if(x1(-boost::hash_detail::limits<T>::epsilon()) == x1((T) 0))
         std::cerr<<"x1(-epsilon) == x1(0) == "<<x1((T) 0)<<"\n";
 
-    BOOST_TEST((T) 1 + std::numeric_limits<T>::epsilon() != (T) 1);
-    if(x1((T) 1 + std::numeric_limits<T>::epsilon()) == x1((T) 1))
+    BOOST_TEST((T) 1 + boost::hash_detail::limits<T>::epsilon() != (T) 1);
+    if(x1((T) 1 + boost::hash_detail::limits<T>::epsilon()) == x1((T) 1))
         std::cerr<<"x1(1 + epsilon) == x1(1) == "<<x1((T) 1)<<"\n";
 
-    BOOST_TEST((T) 1 - std::numeric_limits<T>::epsilon() != (T) 1);
-    if(x1((T) 1 - std::numeric_limits<T>::epsilon()) == x1((T) 1))
+    BOOST_TEST((T) 1 - boost::hash_detail::limits<T>::epsilon() != (T) 1);
+    if(x1((T) 1 - boost::hash_detail::limits<T>::epsilon()) == x1((T) 1))
         std::cerr<<"x1(1 - epsilon) == x1(1) == "<<x1((T) 1)<<"\n";
 
-    BOOST_TEST((T) -1 + std::numeric_limits<T>::epsilon() != (T) -1);
-    if(x1((T) -1 + std::numeric_limits<T>::epsilon()) == x1((T) -1))
+    BOOST_TEST((T) -1 + boost::hash_detail::limits<T>::epsilon() != (T) -1);
+    if(x1((T) -1 + boost::hash_detail::limits<T>::epsilon()) == x1((T) -1))
         std::cerr<<"x1(-1 + epsilon) == x1(-1) == "<<x1((T) -1)<<"\n";
 
-    BOOST_TEST((T) -1 - std::numeric_limits<T>::epsilon() != (T) -1);
-    if(x1((T) -1 - std::numeric_limits<T>::epsilon()) == x1((T) -1))
+    BOOST_TEST((T) -1 - boost::hash_detail::limits<T>::epsilon() != (T) -1);
+    if(x1((T) -1 - boost::hash_detail::limits<T>::epsilon()) == x1((T) -1))
         std::cerr<<"x1(-1 - epsilon) == x1(-1) == "<<x1((T) -1)<<"\n";
 
     // As before.
-    if(std::numeric_limits<T>::has_denorm) {
-        if(x1(std::numeric_limits<T>::denorm_min()) == x1(zero)) {
+    if(boost::hash_detail::limits<T>::has_denorm) {
+        if(x1(boost::hash_detail::limits<T>::denorm_min()) == x1(zero)) {
             std::cerr<<"x1(denorm_min) == x1(zero) == "<<x1(zero)<<"\n";
         }
 #if !BOOST_WORKAROUND(__DECCXX_VER,<70190006)
         // The Tru64/CXX standard library prior to 7.1 contains a bug in the
-        // specialization of std::numeric_limits::denorm_min() for long
+        // specialization of boost::hash_detail::limits::denorm_min() for long
         // doubles which causes this test to fail.
-        if(x1(std::numeric_limits<T>::denorm_min()) !=
-            HASH_NAMESPACE::hash_value(std::numeric_limits<T>::denorm_min()))
+        if(x1(boost::hash_detail::limits<T>::denorm_min()) !=
+            HASH_NAMESPACE::hash_value(boost::hash_detail::limits<T>::denorm_min()))
         {
-            std::cerr<<"x1(std::numeric_limits<T>::denorm_min()) = "
-                << x1(std::numeric_limits<T>::denorm_min())
-                << "\nhash_value(std::numeric_limits<T>::denorm_min()) = "
+            std::cerr<<"x1(boost::hash_detail::limits<T>::denorm_min()) = "
+                << x1(boost::hash_detail::limits<T>::denorm_min())
+                << "\nhash_value(boost::hash_detail::limits<T>::denorm_min()) = "
                 << HASH_NAMESPACE::hash_value(
-                        std::numeric_limits<T>::denorm_min())
+                        boost::hash_detail::limits<T>::denorm_min())
                 << "\nx1(0) = "<<x1(0)<<"\n";
         }
 #endif
@@ -193,12 +193,12 @@ void float_tests(char const* name, T* = 0)
 
 // NaN also causes borland to crash.
 #if !defined(__BORLANDC__)
-    if(std::numeric_limits<T>::has_quiet_NaN) {
-        if(x1(std::numeric_limits<T>::quiet_NaN()) == x1(1.0)) {
+    if(boost::hash_detail::limits<T>::has_quiet_NaN) {
+        if(x1(boost::hash_detail::limits<T>::quiet_NaN()) == x1(1.0)) {
             std::cerr<<"x1(quiet_NaN) == x1(1.0) == "<<x1(1.0)<<"\n";
         }
-        BOOST_TEST(x1(std::numeric_limits<T>::quiet_NaN()) ==
-            HASH_NAMESPACE::hash_value(std::numeric_limits<T>::quiet_NaN()));
+        BOOST_TEST(x1(boost::hash_detail::limits<T>::quiet_NaN()) ==
+            HASH_NAMESPACE::hash_value(boost::hash_detail::limits<T>::quiet_NaN()));
     }
 #endif
 }
diff --git a/hash/test/hash_number_test.cpp b/hash/test/hash_number_test.cpp
index 204f84b..54cbf85 100644
--- a/hash/test/hash_number_test.cpp
+++ b/hash/test/hash_number_test.cpp
@@ -31,7 +31,7 @@
 template <class T>
 void numeric_test(T*)
 {
-    typedef std::numeric_limits<T> limits;
+    typedef boost::hash_detail::limits<T> limits;
 
     compile_time_tests((T*) 0);
 
@@ -55,7 +55,7 @@ void numeric_test(T*)
 
     if (limits::is_integer)
     {
-        if(limits::is_signed || limits::digits <= std::numeric_limits<std::size_t>::digits)
+        if(limits::is_signed || limits::digits <= boost::hash_detail::limits<std::size_t>::digits)
             BOOST_TEST(HASH_NAMESPACE::hash_value(T(-5)) == (std::size_t)T(-5));
         BOOST_TEST(HASH_NAMESPACE::hash_value(T(0)) == (std::size_t)T(0u));
         BOOST_TEST(HASH_NAMESPACE::hash_value(T(10)) == (std::size_t)T(10u));
@@ -67,7 +67,7 @@ void numeric_test(T*)
 template <class T>
 void limits_test(T*)
 {
-    typedef std::numeric_limits<T> limits;
+    typedef boost::hash_detail::limits<T> limits;
 
     if(limits::is_specialized)
     {
@@ -98,7 +98,7 @@ void limits_test(T*)
 template <class T>
 void poor_quality_tests(T*)
 {
-    typedef std::numeric_limits<T> limits;
+    typedef boost::hash_detail::limits<T> limits;
 
     HASH_NAMESPACE::hash<T> x1;
     HASH_NAMESPACE::hash<T> x2;
diff --git a/include/boost/functional/detail/hash_float.hpp b/include/boost/functional/detail/hash_float.hpp
index 92b2b66..6c75c02 100644
--- a/include/boost/functional/detail/hash_float.hpp
+++ b/include/boost/functional/detail/hash_float.hpp
@@ -54,10 +54,43 @@
 
 #endif
 
+// On OpenBSD, numeric_limits is not reliable for long doubles, but
+// the macros defined in <float.h> are.
+
+#if defined(__OpenBSD__)
+#include <float.h>
+#endif
+
 namespace boost
 {
     namespace hash_detail
     {
+        template <class T>
+        struct limits : std::numeric_limits<T> {};
+
+#if defined(__OpenBSD__)
+        template <>
+        struct limits<long double>
+             : std::numeric_limits<long double>
+        {
+            static long double epsilon() {
+                return LDBL_EPSILON;
+            }
+
+            static long double (max)() {
+                return LDBL_MAX;
+            }
+
+            static long double (min)() {
+                return LDBL_MIN;
+            }
+
+            BOOST_STATIC_CONSTANT(int, digits = LDBL_MANT_DIG);
+            BOOST_STATIC_CONSTANT(int, max_exponent = LDBL_MAX_EXP);
+            BOOST_STATIC_CONSTANT(int, min_exponent = LDBL_MIN_EXP);
+        };
+#endif // __OpenBSD__
+
         inline void hash_float_combine(std::size_t& seed, std::size_t value)
         {
             seed ^= value + (seed<<6) + (seed>>2);
@@ -102,29 +135,28 @@ namespace boost
             // sign with the exponent.
             if(v < 0) {
                 v = -v;
-                exp += std::numeric_limits<T>::max_exponent -
-                    std::numeric_limits<T>::min_exponent;
+                exp += limits<T>::max_exponent -
+                    limits<T>::min_exponent;
             }
 
             // The result of frexp is always between 0.5 and 1, so its
             // top bit will always be 1. Subtract by 0.5 to remove that.
             v -= T(0.5);
             v = boost::hash_detail::call_ldexp(v,
-                    std::numeric_limits<std::size_t>::digits + 1);
+                    limits<std::size_t>::digits + 1);
             std::size_t seed = static_cast<std::size_t>(v);
             v -= seed;
 
             // ceiling(digits(T) * log2(radix(T))/ digits(size_t)) - 1;
             std::size_t const length
-                = (std::numeric_limits<T>::digits *
-                        boost::static_log2<std::numeric_limits<T>::radix>::value
-                        - 1)
-                / std::numeric_limits<std::size_t>::digits;
+                = (limits<T>::digits *
+                        boost::static_log2<limits<T>::radix>::value - 1)
+                / limits<std::size_t>::digits;
 
             for(std::size_t i = 0; i != length; ++i)
             {
                 v = boost::hash_detail::call_ldexp(v,
-                        std::numeric_limits<std::size_t>::digits);
+                        limits<std::size_t>::digits);
                 std::size_t part = static_cast<std::size_t>(v);
                 v -= part;
                 hash_float_combine(seed, part);
diff --git a/include/boost/functional/hash.hpp b/include/boost/functional/hash.hpp
index 60b2608..508f49a 100644
--- a/include/boost/functional/hash.hpp
+++ b/include/boost/functional/hash.hpp
@@ -8,3 +8,4 @@
 //  issue 6.18. 
 
 #include <boost/functional/hash/hash.hpp>
+
diff --git a/include/boost/functional/hash/extensions.hpp b/include/boost/functional/hash/extensions.hpp
new file mode 100644
index 0000000..3681e0e
--- /dev/null
+++ b/include/boost/functional/hash/extensions.hpp
@@ -0,0 +1,182 @@
+
+// Copyright 2005-2007 Daniel James.
+// 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)
+
+//  Based on Peter Dimov's proposal
+//  http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1756.pdf
+//  issue 6.18. 
+
+#if !defined(BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP)
+#define BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+namespace boost
+{
+
+#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
+    namespace hash_detail
+    {
+        template <bool IsArray>
+        struct call_hash_impl
+        {
+            template <class T>
+            struct inner
+            {
+                static std::size_t call(T const& v)
+                {
+                    using namespace boost;
+                    return hash_value(v);
+                }
+            };
+        };
+
+        template <>
+        struct call_hash_impl<true>
+        {
+            template <class Array>
+            struct inner
+            {
+#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+                static std::size_t call(Array const& v)
+#else
+                static std::size_t call(Array& v)
+#endif
+                {
+                    const int size = sizeof(v) / sizeof(*v);
+                    return boost::hash_range(v, v + size);
+                }
+            };
+        };
+
+        template <class T>
+        struct call_hash
+            : public call_hash_impl<boost::is_array<T>::value>
+                ::BOOST_NESTED_TEMPLATE inner<T>
+        {
+        };
+    }
+#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+
+#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+    template <class T> struct hash
+        : std::unary_function<T, std::size_t>
+    {
+#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
+        std::size_t operator()(T const& val) const
+        {
+            return hash_value(val);
+        }
+#else
+        std::size_t operator()(T const& val) const
+        {
+            return hash_detail::call_hash<T>::call(val);
+        }
+#endif
+    };
+
+#if BOOST_WORKAROUND(__DMC__, <= 0x848)
+    template <class T, unsigned int n> struct hash<T[n]>
+        : std::unary_function<T[n], std::size_t>
+    {
+        std::size_t operator()(const T* val) const
+        {
+            return boost::hash_range(val, val+n);
+        }
+    };
+#endif
+
+#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+    // On compilers without partial specialization, boost::hash<T>
+    // has already been declared to deal with pointers, so just
+    // need to supply the non-pointer version.
+
+    namespace hash_detail
+    {
+        template <bool IsPointer>
+        struct hash_impl;
+
+#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+
+        template <>
+        struct hash_impl<false>
+        {
+            template <class T>
+            struct inner
+                : std::unary_function<T, std::size_t>
+            {
+#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
+                std::size_t operator()(T const& val) const
+                {
+                    return hash_value(val);
+                }
+#else
+                std::size_t operator()(T const& val) const
+                {
+                    return hash_detail::call_hash<T>::call(val);
+                }
+#endif
+            };
+        };
+
+#else // Visual C++ 6.5
+
+    // There's probably a more elegant way to Visual C++ 6.5 to work
+    // but I don't know what it is.
+
+        template <bool IsConst>
+        struct hash_impl_msvc
+        {
+            template <class T>
+            struct inner
+                : public std::unary_function<T, std::size_t>
+            {
+                std::size_t operator()(T const& val) const
+                {
+                    return hash_detail::call_hash<T const>::call(val);
+                }
+
+                std::size_t operator()(T& val) const
+                {
+                    return hash_detail::call_hash<T>::call(val);
+                }
+            };
+        };
+
+        template <>
+        struct hash_impl_msvc<true>
+        {
+            template <class T>
+            struct inner
+                : public std::unary_function<T, std::size_t>
+            {
+                std::size_t operator()(T& val) const
+                {
+                    return hash_detail::call_hash<T>::call(val);
+                }
+            };
+        };
+        
+        template <class T>
+        struct hash_impl_msvc2
+            : public hash_impl_msvc<boost::is_const<T>::value>
+                    ::BOOST_NESTED_TEMPLATE inner<T> {};
+        
+        template <>
+        struct hash_impl<false>
+        {
+            template <class T>
+            struct inner : public hash_impl_msvc2<T> {};
+        };
+
+#endif // Visual C++ 6.5
+    }
+#endif  // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+}
+
+#endif
diff --git a/include/boost/functional/hash/hash.hpp b/include/boost/functional/hash/hash.hpp
index b11862c..45ab213 100644
--- a/include/boost/functional/hash/hash.hpp
+++ b/include/boost/functional/hash/hash.hpp
@@ -518,176 +518,12 @@ namespace boost
 }
 
 #endif // BOOST_FUNCTIONAL_HASH_HASH_HPP
-////////////////////////////////////////////////////////////////////////////////
+
+// Include this outside of the include guards in case the file is included
+// twice - once with BOOST_HASH_NO_EXTENSIONS defined, and then with it
+// undefined.
 
 #if !defined(BOOST_HASH_NO_EXTENSIONS) \
     && !defined(BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP)
-#define BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP
-
-namespace boost
-{
-
-#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-    namespace hash_detail
-    {
-        template <bool IsArray>
-        struct call_hash_impl
-        {
-            template <class T>
-            struct inner
-            {
-                static std::size_t call(T const& v)
-                {
-                    using namespace boost;
-                    return hash_value(v);
-                }
-            };
-        };
-
-        template <>
-        struct call_hash_impl<true>
-        {
-            template <class Array>
-            struct inner
-            {
-#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-                static std::size_t call(Array const& v)
-#else
-                static std::size_t call(Array& v)
+#include <boost/functional/hash/extensions.hpp>
 #endif
-                {
-                    const int size = sizeof(v) / sizeof(*v);
-                    return boost::hash_range(v, v + size);
-                }
-            };
-        };
-
-        template <class T>
-        struct call_hash
-            : public call_hash_impl<boost::is_array<T>::value>
-                ::BOOST_NESTED_TEMPLATE inner<T>
-        {
-        };
-    }
-#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
-
-#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
-
-    template <class T> struct hash
-        : std::unary_function<T, std::size_t>
-    {
-#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-        std::size_t operator()(T const& val) const
-        {
-            return hash_value(val);
-        }
-#else
-        std::size_t operator()(T const& val) const
-        {
-            return hash_detail::call_hash<T>::call(val);
-        }
-#endif
-    };
-
-#if BOOST_WORKAROUND(__DMC__, <= 0x848)
-    template <class T, unsigned int n> struct hash<T[n]>
-        : std::unary_function<T[n], std::size_t>
-    {
-        std::size_t operator()(const T* val) const
-        {
-            return boost::hash_range(val, val+n);
-        }
-    };
-#endif
-
-#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
-
-    // On compilers without partial specialization, boost::hash<T>
-    // has already been declared to deal with pointers, so just
-    // need to supply the non-pointer version.
-
-    namespace hash_detail
-    {
-        template <bool IsPointer>
-        struct hash_impl;
-
-#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-
-        template <>
-        struct hash_impl<false>
-        {
-            template <class T>
-            struct inner
-                : std::unary_function<T, std::size_t>
-            {
-#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-                std::size_t operator()(T const& val) const
-                {
-                    return hash_value(val);
-                }
-#else
-                std::size_t operator()(T const& val) const
-                {
-                    return hash_detail::call_hash<T>::call(val);
-                }
-#endif
-            };
-        };
-
-#else // Visual C++ 6.5
-
-    // There's probably a more elegant way to Visual C++ 6.5 to work
-    // but I don't know what it is.
-
-        template <bool IsConst>
-        struct hash_impl_msvc
-        {
-            template <class T>
-            struct inner
-                : public std::unary_function<T, std::size_t>
-            {
-                std::size_t operator()(T const& val) const
-                {
-                    return hash_detail::call_hash<T const>::call(val);
-                }
-
-                std::size_t operator()(T& val) const
-                {
-                    return hash_detail::call_hash<T>::call(val);
-                }
-            };
-        };
-
-        template <>
-        struct hash_impl_msvc<true>
-        {
-            template <class T>
-            struct inner
-                : public std::unary_function<T, std::size_t>
-            {
-                std::size_t operator()(T& val) const
-                {
-                    return hash_detail::call_hash<T>::call(val);
-                }
-            };
-        };
-        
-        template <class T>
-        struct hash_impl_msvc2
-            : public hash_impl_msvc<boost::is_const<T>::value>
-                    ::BOOST_NESTED_TEMPLATE inner<T> {};
-        
-        template <>
-        struct hash_impl<false>
-        {
-            template <class T>
-            struct inner : public hash_impl_msvc2<T> {};
-        };
-
-#endif // Visual C++ 6.5
-    }
-#endif  // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
-}
-
-#endif
-