Hi Michael - Thanks much for your response. I actually did originally intend to use an STL map, but I couldn't get it to work. It seemed that when I added a C++ object to a map declared as an instance variable within my ObjC++ class's header file, this generated an "EXC_BAD_ACCESS" signal - and no exception thrown. As a test, I created a temp STL map in the implementation/.mm file for this class, and added my C++ object to that map and it seemed to work fine. So I assumed that templated classes weren't supported as instance variables for an ObjC++ class.
I'll definitely investigate using CFMutableDictionary instead if indeed STL won't work for instance variables. Thanks, JB On Fri, Nov 7, 2008 at 10:29 PM, Michael Ash <[EMAIL PROTECTED]> wrote: > On Fri, Nov 7, 2008 at 8:41 PM, Jonathan Bailey <[EMAIL PROTECTED]> wrote: >> Hi all - >> >> I am trying to find a way to create a dynamically-growable objective C >> data structure within objective C++ code, such as a >> NSMutableDictionary, that can store values that are pointers to an >> objective C++ or straight-up C++ object. >> >> NSMutableDictionary seems to only accept pointers to objective C >> objects, however, and not to arbitrary objects. This seems like a >> simple thing to do but I am a bit stumped. Does anyone know of a way >> to do this? > > CFMutableDictionary will accept arbitrary pointers, and allows you to > provide callbacks so that it knows how to work with them. > > As an added bonus, CFMutableDictionary is "toll-free bridged" to > NSMutableDictionary, meaning that you can simply cast the pointer and > use it. The bridging is not 100% with custom callbacks, as there are > parts of the NSMutableDictionary API which assume that you are storing > only Objective-C objects, but for dictionaries which actually are > storing Objective-C objects it's very useful. This also means that you > can store it in other Cocoa collections like NSArray, other > NSDictionaries, etc. > > And note that if you're using Objective-C++, there's nothing > preventing you from using STL collections for this sort of thing, if > they do what you like. > > Mike > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/jonb%40drumwell.net > > This email sent to [EMAIL PROTECTED] > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
