Unordered: Merge from trunk

- Remove use of BOOST_DEDUCED_TYPENAME and BOOST_UNORDERED_PAIR_CAST, it's
  unlikely that the compilers which require them will be able to cope with the
  new version of unordered.
- Use the old equality algorithm if BOOST_UNORDERED_DEPRECATED_EQUALITY is
  defined.
- Use SFINAE to control which overloads of `construct_impl` are available.
  Fixes problems with differing overload resolution on different compilers.
- Support for piecewise pair construction.
- Only support the old variadic pair construction when
  BOOST_UNORDERED_DEPRECATED_PAIR_CONSTRUCT is defined (also fixed some bugs).
- Avoid instantiating BOOST_RV_REF for non-classes.
- Support optional allocator member functions for compilers with SFINAE
  expressions and Visual C++ 9.0/10.0
- Follow boost macro naming conventions.
- Improved portability for `allocator_traits` emulation.

Current compiler support:

- Full support for GCC 4.4+, Visual C++ 9.0+, Clang.
- All other compilers odn't support optional allocator members.
- No other errors for GCC 3.4.6+, Visual C++ 8.0, Intel, Pathscale.
- Visual Age has a compile error if `select_on_container_copy_construction`
  isn't `const` (it should ignore it).
- `select_on_container_copy_construction` detection doesn't work on Sun.
- `unnecessary_copy_tests` is failling for vacpp on AIX, but not on linux.
- Warnings causing failures for Visual C++ with STLport and WM5.


[SVN r74234]

test/unordered/minimal_allocator.cpp

@@ -0,0 +1,89 @@
+
+// Copyright 2011 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)
+
+#include <boost/unordered/detail/allocator_helpers.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/mpl/assert.hpp>
+#include "../objects/test.hpp"
+
+template <class Tp> 
+struct SimpleAllocator
+{ 
+    typedef Tp value_type;
+
+    SimpleAllocator()
+    {
+    }
+
+    template <class T> SimpleAllocator(const SimpleAllocator<T>& other)
+    {
+    }
+
+    Tp *allocate(std::size_t n)
+    {
+        return static_cast<Tp*>(::operator new(n * sizeof(Tp)));
+    }
+
+    void deallocate(Tp* p, std::size_t)
+    {
+        ::operator delete((void*) p);
+    }
+};
+
+template <typename T>
+void test_simple_allocator()
+{
+    test::check_instances check_;
+
+    typedef boost::unordered::detail::allocator_traits<
+        SimpleAllocator<T> > traits;
+
+    BOOST_MPL_ASSERT((boost::is_same<typename traits::allocator_type, SimpleAllocator<T> >));
+
+    BOOST_MPL_ASSERT((boost::is_same<typename traits::value_type, T>));
+
+    BOOST_MPL_ASSERT((boost::is_same<typename traits::pointer, T* >));
+    BOOST_MPL_ASSERT((boost::is_same<typename traits::const_pointer, T const*>));
+    //BOOST_MPL_ASSERT((boost::is_same<typename traits::void_pointer, void* >));
+    //BOOST_MPL_ASSERT((boost::is_same<typename traits::const_void_pointer, void const*>));
+
+    BOOST_MPL_ASSERT((boost::is_same<typename traits::difference_type, std::ptrdiff_t>));
+    BOOST_MPL_ASSERT((boost::is_same<typename traits::size_type, std::size_t>));
+
+    BOOST_TEST(!traits::propagate_on_container_copy_assignment::value);
+    BOOST_TEST(!traits::propagate_on_container_move_assignment::value);
+    BOOST_TEST(!traits::propagate_on_container_swap::value);
+
+    // rebind_alloc
+    // rebind_traits
+
+    SimpleAllocator<T> a;
+
+    T* ptr1 = traits::allocate(a, 1);
+    //T* ptr2 = traits::allocate(a, 1, static_cast<void const*>(ptr1));
+    
+    traits::construct(a, ptr1, T(10));
+    //traits::construct(a, ptr2, T(30), ptr1);
+
+    BOOST_TEST(*ptr1 == T(10));
+    //BOOST_TEST(*ptr2 == T(30));
+
+    traits::destroy(a, ptr1);
+    //traits::destroy(a, ptr2);
+
+    //traits::deallocate(a, ptr2, 1);
+    traits::deallocate(a, ptr1, 1);
+
+    traits::max_size(a);
+}
+
+int main()
+{
+    test_simple_allocator<int>();
+    test_simple_allocator<test::object>();
+
+    return boost::report_errors();
+}