On Jan 8, 2009, at 12:42 PM, Ion Gaztañaga wrote:
is quite problematic for container implementation. With the old emulation (that returned detail::rv<T>) this was possible:
class vector { void push_back(const value_type &); void push_back(boost::detail::rv<value_type>); }
Is it practical to do this instead? class vector { void push_back(value_type x); // internally move construct from x } You take a performance hit on lvalue copyable expressions which are expensive to move. But it gives you the functionality of: class vector { void push_back(const value_type&); void push_back(value_type&&); } And there is no hit on rvalue expressions (if I recall correctly, it has been a little while since I did this survey). I don't know, but from conversations with Sean, I suspect this is the direction the Adobe move emulation took. -Howard