Re: [boost] [move] unique_ptr converting constructor

El 04/05/2015 a las 1:23, Peter Dimov escribió:

While looking at

https://svn.boost.org/trac/boost/ticket/11259

I found that after implementing a converting shared_ptr constructor that takes a boost::movelib::unique_ptr, the straightforward code in the ticket still fails (with g++ in C++03 mode):

mystd::shared_ptr<int> get_thing() { mystd::unique_ptr<int> r( load_thing() ); return boost::move( r ); }

fail for the unique_ptr<int const> case.

Thanks Peter, That's because the converting constructor is programed as taking rv> (similar to unique_ptr &&) and that provokes emulation limitations when returning by value convertible types. One workaround is to take the argument by value in C++03 compilers, like you've done in shared_ptr. I'll try to experiment with this approach to see if improves the situation. Thanks, Ion