id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11259	boost::movelib::unique_ptr is not convertible to boost::shared_ptr	Tavian Barnes <tavianator@…>	Peter Dimov	"I'm working on porting some code to a platform without a C++11 standard library, and wanted to use the Boost versions of shared_ptr and unique_ptr.  Unfortunately code like this doesn't work:

{{{
namespace mystd {
    using boost::shared_ptr;
    using boost::make_shared;

    using boost::movelib::unique_ptr;
    using boost::movelib::make_unique;
}

mystd::unique_ptr<int> load_thing() {
    return mystd::make_unique<int>(1);
}

mystd::shared_ptr<int> get_thing() {
    return load_thing();
}
}}}

because there is no conversion from movelib::unique_ptr to shared_ptr.

I'm happy to submit a patch that adds it but I'm not sure whether it's okay to add a Boost.Move dependency to Boost.SmartPtr.  And if I do that, should I also add move emulation to boost::shared_ptr?  C++03 users might like the performance benefit of moving them instead of copying them."	Feature Requests	new	To Be Determined	smart_ptr	Boost 1.58.0	Problem