Add bool_negate_var to BDD library
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Add
bool_negate_varto the BDD library.This function negates all instances of a variable in a BDD. For example, say you have a BDD for
(A & ~B & C) | (~A & ~C). Runningbool_negate_varfor theAvariable will yield(~A & ~B & C) | (A & ~C).I've found this useful for working with the BDD representation of the state space, and I'm happy to provide an example if it would be helpful.
Also, if there's a better name, I'm definitely open to alternatives.