Ole Kröger

Unfortunately I don't support every function atm and must rewrite my parser for this. This might take a while. Sorry

Thanks for opening the issue. It seems like you forgot a bracket in the `sum` constraint but I'm quite surprised that this doesn't throw an error for me. Will open...

The user would need to write something like: ``` @constraint( model, BooleanConstraint(sum(x == i && x == i for i = 1:2)

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