------- Comment #9 from jwakely dot gcc at gmail dot com 2009-06-23 18:40
-------
The library pieces of Doug's patch that still need to be applied are:
* include/std/tuple (_Tuple_impl): Use lvalue references when
explicitly specifying the template argument to std::move.
* include/std/iosfwd (operator<<): Provide a forwarding operator<<
that accepts rvalue streams.
(operator>>): Ditto.
* include/bits/stl_iterator.h (move_iterator::operator*):
Explicitly std::move the result, to convert it to an rvalue
reference.
* include/bits/stl_move.h (forward): Forward lvalues (which may
end up being turned into rvalues).
(move): Explicitly static_cast to an rvalue.
* testsuite/27_io/rvalue_streams.cc: New; test the use of rvalue
streams. Works except for the fact that we can't call str() on the
result. (This is an existing issue).
I think the move_iterator and tuple changes would be OK to apply now but the
stream parts have a FIXME and as discussed, the definition of std::move is
undecided. I'll come back to this soon.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40486
