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,,,