id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3326	struct tagging in constructor stops conditional construction without .swap call	Andy Schneider <andrew.schneider@…>	Ion Gaztañaga	"I'd like to do this: 

   shared_memory_object shm_obj
      (isOwner  ? create_only  : open_only
      ,""shared_memory""              //name
      ,read_write                    //read-write mode
      );

but I don't seem to be able to because create_only and open_only are tag structs. 

Instead I end up with something like this:

shared_memory_object shm;

if (isOwner)
{
    shared_memory_object shm_obj (...)
    shm_obj.swap (shm);
}
else
{
    shared_memory_object shm_obj (...)
    shm_obj.swap (shm);
}

which isn't as clean imho. What's the rational for a tag struct rather than enum? 
"	Bugs	closed	Boost 1.40.0	interprocess	Boost 1.39.0	Cosmetic	wontfix