-----Original Message----- From: Pierre DOUCY [mailto:pdoucyml@free.fr] Sent: Friday, May 07, 2004 1:47 AM To: Boost General General Subject: [boost] Writing fully custom containers for the bgl

I have written a custom container for the bgl's adjacency_list which was based on a subclass of a stl container (namely, std:list). Everything seemed to work just fine (if not by itself) as I followed the bgl book indications.

Now, I'm working on a non stl-based container (a wrapper around the bdb API), and facing a lot of compile-time problems. I know my bdb wrapper is not fully stl-compliant.

So my question is : if I make this wrapper fully standard-compliant (for instance by using boost::iterator and by implementing everything the stl tells me to implement in a AssociativeContainer or a MultipleAssociativeContainer), will the bgl play nicely with it (i.e. as if it was a std::map, for instance) ?

I think even if you do this you will not get standard-compliant AssociativeContainer The reason is simple: bdb cursor does not have all functionality of std iterator.

If not, what should I do to be able to use my containers with the bgl. I haven't found any examples out there, and wondered if anyone tried (and succeded) in this task.

My second question is : how and when does the adjacency_list instantiates its containers, and is there any way to mess with it, by passing special arguments to the containers when instatiating my graph ? Reading the code and following the process in a debugger doesn't really make my ideas clearer.

Thanks in advance for any help and/or ideas

Pierre

-- Written slowly for people who can't read fast.

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