struct tagging in constructor stops conditional construction without .swap call

[Andy Schneider <andrew.schneider@…>]

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?

[Ion Gaztañaga]

This is not a bug. Maybe annoying for some but there are no more annoyance reports on this.