Make move and forward work in C++03.

These functions are key to allowing the use of rvalues and variadics
in C++03 mode. Everything works the same as in C++11, except for one
tangentially related case:

struct T {
  T(T &&) = default;
};

In C++11, T has a deleted copy constructor. But in C++03 Clang gives
it both a move and a copy constructor. This seems reasonable enough
given the extensions it's using.

The other changes in this patch were the minimal set required
to keep the tests passing after the move/forward change. Most notably
the removal of the `__rv<unique_ptr>` hack that was present
in an attempt to make unique_ptr move only without language support.

llvm-svn: 364063

1 files changed, 0 insertions, 4 deletions

diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
index 326e566fbf7..d17666a2955 100644
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -3181,11 +3181,7 @@ _SampleIterator sample(_PopulationIterator __first,
 
 template<class _RandomAccessIterator, class _UniformRandomNumberGenerator>
     void shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last,
-#ifndef _LIBCPP_CXX03_LANG
                  _UniformRandomNumberGenerator&& __g)
-#else
-                 _UniformRandomNumberGenerator& __g)
-#endif
 {
     typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type;
     typedef uniform_int_distribution<ptrdiff_t> _Dp;