feat: general constraints

ugur-a commented 3 weeks ago

This PR adds all* the necessary bits and pieces for implementing general constraints.

* Actually, I keep finding new places I missed every time I look through the crate, so I'm pretty sure some are still missing. But I think I've got a lot of them already

TODOs

[ ] Model::feas_relax may require further changes?

References

Gurobi documentation

ugur-a commented 3 weeks ago

Oops, it looks like a lot of tests broke. I'll take a look

ugur-a commented 3 weeks ago

So there are 2 reasons for the failures: 1) predictably, attribute_names in src/attribute.rs There's already a TODO there -- basically, there aren't any general constraints actually implemented, so I can't create one and test it against a corresponding attribute.

2) integrations tests iis, heuristic_soln and phases For each of these, gzip that complains about the files:

tests/data/neos859080.mps.gz
tests/data/traininstance2.mps.gz
and tests/data/sing44.mps.gz, respectively I'm not sure if it's because of my gzip that's broken somehow, but it's almost certainly not caused by the changes

ykrist / rust-grb

feat: general constraints #17

TODOs

References