iMesh telecon: closure and adjacency

[Carl Ollivier-Gooch]

On 09/09/2010 01:53 PM, Tim Tautges wrote:
> I was under the impression that asking for self-adjacencies was supposed
> to return an error. I agree with Jim that silently returning nothing
> makes things less bad, though not ideal. If it returns an error, then
> there are clear efficiency problems, due to the required filtering that
> you'd have to do on lists of entities passed to the adjacency call. Are
> we sure that a silent return-nothing is what we specified? I thought for
> sure it was supposed to return error...

Silent-return-nothing is the behavior that the unit test expect, and the 
behavior that both GRUMMP and FMDB give (and MOAB did, too, if I recall 
correctly, at some point in the past?).  And the reason for that choice 
is precisely this situation: that otherwise there are problems when you 
pass in a list of entities (or iterate over a mixed collection of 
entities, though that one's easy to filter).

Carl

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