invalid init of reference with gcc 4.5, 4.6 with -std=c++0x

[itsme@…]

see #4396 - for the threads library this problem is now solved.

this code builds fine with msvc2010

with gcc 4.6 beta i get the same error.

without the -std=c++0x option it compiles ok

with boost_1_40_0 and boost_1_39_0 i also get the same error.

echo '#include "boost/interprocess/file_mapping.hpp"' > xinc.cpp
g++-mp-4.5 -I /opt/local/include/ xinc.cpp -std=c++0x


In file included from /opt/local/include/boost/interprocess/detail/utilities.hpp:25:0,
                 from /opt/local/include/boost/interprocess/file_mapping.hpp:19,
                 from xinc.cpp:1:
/opt/local/include/boost/interprocess/detail/move.hpp: In function 'typename boost::remove_reference<T>::type&& boost::interprocess::move(T&&) [with T = boost::interprocess::file_mapping&, typename boost::remove_reference<T>::type = boost::interprocess::file_mapping]':
/opt/local/include/boost/interprocess/file_mapping.hpp:62:55:   instantiated from here
/opt/local/include/boost/interprocess/detail/move.hpp:342:11: error: invalid initialization of reference of type 'boost::remove_reference<boost::interprocess::file_mapping&>::type&&' from expression of type 'boost::interprocess::file_mapping'

[itsme@…]

see [62717]

this is the patch to make ipc build with gcc4.5

Index: boost/interprocess/detail/move.hpp
===================================================================
--- boost/interprocess/detail/move.hpp	(revision 64212)
+++ boost/interprocess/detail/move.hpp	(working copy)
@@ -355,7 +355,7 @@
 #else
 template <class T> inline 
 typename remove_reference<T>::type&& move(T&& t)
-{  return t;   }
+{  return static_cast<typename remove_reference<T>::type&&>(t);   }
 #endif
 
 //////////////////////////////////////////////////////////////////////////////

[Ion Gaztañaga]

Fixed for Boost 1.45 in release branch