Movable unordered containers, full support only for compilers with rvalue references.

Merged revisions 44076-44414 via svnmerge from 
https://svn.boost.org/svn/boost/branches/unordered/trunk

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  r44076 | danieljames | 2008-04-06 20:41:19 +0100 (Sun, 06 Apr 2008) | 1 line
  
  Move semantics for compilers with rvalue references.
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  r44077 | danieljames | 2008-04-06 20:48:59 +0100 (Sun, 06 Apr 2008) | 1 line
  
  Do move assignment 'properly'.
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  r44085 | danieljames | 2008-04-06 22:46:04 +0100 (Sun, 06 Apr 2008) | 1 line
  
  Use normal references for the move members, reset the source buckets_ pointer to stop the buckets getting deleted, and remove a superflous pointer check.
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  r44109 | danieljames | 2008-04-07 23:49:36 +0100 (Mon, 07 Apr 2008) | 1 line
  
  Add missing tests.
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  r44366 | danieljames | 2008-04-13 12:59:46 +0100 (Sun, 13 Apr 2008) | 1 line
  
  Avoid using rvalue references in the implementation files.
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  r44368 | danieljames | 2008-04-13 15:13:33 +0100 (Sun, 13 Apr 2008) | 6 lines
  
  Use a cut down version of the work in progress move library to implement move
  semantics on more compilers. Unfortunately the move constructor with allocator
  isn't really practical at the moment, since in the case where the container
  can't be moved, and the allocators aren't equal it will copy the container
  twice.
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[SVN r44486]

include/boost/unordered/detail/config.hpp

@@ -0,0 +1,18 @@
+
+// Copyright 2008 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)
+
+#if !defined(BOOST_UNORDERED_DETAIL_CONFIG_HEADER)
+#define BOOST_UNORDERED_DETAIL_CONFIG_HEADER
+
+#include <boost/config.hpp>
+
+#if defined(BOOST_NO_SFINAE)
+#  define BOOST_UNORDERED_NO_HAS_MOVE_ASSIGN
+#elif defined(__GNUC__) && \
+    (__GNUC__ < 3 || __GNUC__ == 3 && __GNUC_MINOR__ <= 3)
+#  define BOOST_UNORDERED_NO_HAS_MOVE_ASSIGN
+#endif
+
+#endif