Merge latest changes for unordered. Improved compatability and a few tweaks.

Merged revisions 53127,53253,53256,53311,53314,53316-53318 via svnmerge from 
https://svn.boost.org/svn/boost/trunk

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  r53127 | danieljames | 2009-05-20 07:43:38 +0100 (Wed, 20 May 2009) | 1 line
  
  Better configuration for boost.unordered.
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  r53253 | danieljames | 2009-05-25 20:14:07 +0100 (Mon, 25 May 2009) | 3 lines
  
  Add explicit destructors to the unordered containers. Refs #2908.
  
  Isn't really needed but it doesn't hurt.
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  r53256 | danieljames | 2009-05-25 20:45:23 +0100 (Mon, 25 May 2009) | 1 line
  
  Unordered change log for explicit destructors.
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  r53311 | danieljames | 2009-05-27 18:42:01 +0100 (Wed, 27 May 2009) | 1 line
  
  Missing changelog entry.
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  r53314 | danieljames | 2009-05-27 18:44:09 +0100 (Wed, 27 May 2009) | 1 line
  
  Use lightweight_test for unordered.
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  r53316 | danieljames | 2009-05-27 19:19:32 +0100 (Wed, 27 May 2009) | 1 line
  
  Some workarounds for old versions of Borland.
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  r53317 | danieljames | 2009-05-27 19:32:22 +0100 (Wed, 27 May 2009) | 1 line
  
  Fix a change accidentally included in the last commit.
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  r53318 | danieljames | 2009-05-27 19:32:38 +0100 (Wed, 27 May 2009) | 1 line
  
  Remove an unused function.
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[SVN r53465]

include/boost/unordered/detail/config.hpp

@@ -19,4 +19,12 @@
 #  define BOOST_UNORDERED_NO_HAS_MOVE_ASSIGN
 #endif
 
+#if defined(BOOST_HAS_RVALUE_REFS) && defined(BOOST_HAS_VARIADIC_TMPL)
+#   if defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)
+        // STLport doesn't have std::forward.
+#   else
+#       define BOOST_UNORDERED_STD_FORWARD
+#   endif
+#endif
+
 #endif

include/boost/unordered/detail/hash_table.hpp

@@ -12,6 +12,7 @@
 #endif
 
 #include <boost/config.hpp>
+#include <boost/unordered/detail/config.hpp>
 
 #if !defined(BOOST_UNORDERED_EMPLACE_LIMIT)
 #define BOOST_UNORDERED_EMPLACE_LIMIT 5
@@ -45,7 +46,7 @@
 
 #include <boost/mpl/aux_/config/eti.hpp>
 
-#if !(defined(BOOST_HAS_RVALUE_REFS) && defined(BOOST_HAS_VARIADIC_TMPL))
+#if !(defined(BOOST_UNORDERED_STD_FORWARD))
 
 #include <boost/preprocessor/repetition/enum_params.hpp>
 #include <boost/preprocessor/repetition/enum_binary_params.hpp>

include/boost/unordered/detail/hash_table_impl.hpp

@@ -89,7 +89,7 @@ namespace boost {
             struct value_base {
                 typename boost::aligned_storage<
                     sizeof(value_type),
-                    boost::alignment_of<value_type>::value>::type data_;
+                    ::boost::alignment_of<value_type>::value>::type data_;
 
                 void* address() { return this; }
             };
@@ -198,7 +198,7 @@ namespace boost {
                     }
                 }
 
-#if defined(BOOST_HAS_RVALUE_REFS) && defined(BOOST_HAS_VARIADIC_TMPL)
+#if defined(BOOST_UNORDERED_STD_FORWARD)
                 template <typename... Args>
                 void construct(Args&&... args)
                 {
@@ -257,13 +257,6 @@ namespace boost {
                 
 #else
 
-                void construct()
-                {
-                    construct_preamble();
-                    new(node_->address()) value_type;
-                    value_constructed_ = true;
-                }
-
 #define BOOST_UNORDERED_CONSTRUCT_IMPL(z, n, _)                                 \
                 template <                                                      \
                     BOOST_UNORDERED_TEMPLATE_ARGS(z, n)                         \
@@ -292,8 +285,7 @@ namespace boost {
                     new(node_->address()) value_type(                           \
                         BOOST_UNORDERED_CALL_PARAMS(z, n)                       \
                     );                                                          \
-                }                                                               \
-                                                                                \
+                }
                                                                                 
 #define BOOST_UNORDERED_CONSTRUCT_IMPL2(z, n, _)                                \
                 template <typename First, typename Second, typename Key,        \
@@ -1602,7 +1594,7 @@ namespace boost {
 
             // For maps if there is more than one argument, the key can be the first argument.
 
-#if defined(BOOST_HAS_RVALUE_REFS) && defined(BOOST_HAS_VARIADIC_TMPL)
+#if defined(BOOST_UNORDERED_STD_FORWARD)
             template <typename Arg, typename Arg1, typename... Args>
             static BOOST_DEDUCED_TYPENAME
                 boost::mpl::if_<
@@ -1733,7 +1725,7 @@ namespace boost {
 
 #if BOOST_UNORDERED_EQUIVALENT_KEYS
 
-#if defined(BOOST_HAS_RVALUE_REFS) && defined(BOOST_HAS_VARIADIC_TMPL)
+#if defined(BOOST_UNORDERED_STD_FORWARD)
 
             // Emplace (equivalent key containers)
             // (I'm using an overloaded emplace for both 'insert' and 'emplace')
@@ -1943,7 +1935,7 @@ namespace boost {
                 }
             }
 
-#if defined(BOOST_HAS_RVALUE_REFS) && defined(BOOST_HAS_VARIADIC_TMPL)
+#if defined(BOOST_UNORDERED_STD_FORWARD)
 
             // Emplace (unique keys)
             // (I'm using an overloaded emplace for both 'insert' and 'emplace')