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From: Joaquin M López Muñoz (joaquinlopezmunoz_at_[hidden])
Date: 2020-03-13 17:00:45

El 12/03/2020 a las 21:53, MM via Boost-users escribió:
> Hello
> I want a collection to store a relationship N to M like so:
> Item of type A                 Item of type B
> A1                                    B1,B2,B3
> A2                                    B4
> A3                                    B1
> and I would like a convenient way to get from a A instance to the list
> of B instances, and vice versa,
> from a given B instance to the list of A instances.
> At runtime, the A objects are created first, then a list of B objects
> is created.
> Later, B objects get modified asynchronously and that modification
> need to update the relevant
> A instances
> what container to use?
> boost::bimap< unordered_set<A*> , unordered_set<B*> >

As the relationship is N:M, you'll want something like

 Â boost::bimap< unordered_multiset_of<A*> , unordered_multiset_of<B*> >

Joaquín M López Muñoz

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