pumpkin-core 0.4.0

The core of the Pumpkin constraint programming solver.
Documentation 
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mod assignments;
mod propagator_queue;
pub(crate) mod reason;
pub(crate) mod test_solver;
mod trailed;

pub(crate) use assignments::Assignments;
pub(crate) use assignments::ConstraintProgrammingTrailEntry;
pub use assignments::EmptyDomain;
pub(crate) use propagator_queue::PropagatorQueue;
pub use trailed::*;

#[cfg(test)]
mod tests {
    use assignments::Assignments;

    use crate::conjunction;
    use crate::containers::StorageKey;
    use crate::engine::TrailedValues;
    use crate::engine::cp::assignments;
    use crate::engine::notifications::NotificationEngine;
    use crate::engine::reason::ReasonStore;
    use crate::predicate;
    use crate::proof::ConstraintTag;
    use crate::proof::InferenceCode;
    use crate::propagation::PropagationContext;
    use crate::propagation::PropagatorId;

    #[test]
    fn test_no_update_reason_store_if_no_update_lower_bound() {
        let mut assignments = Assignments::default();
        let mut trailed_values = TrailedValues::default();
        let domain = assignments.grow(5, 10);

        let mut reason_store = ReasonStore::default();
        assert_eq!(reason_store.len(), 0);
        {
            let mut notification_engine = NotificationEngine::default();
            let mut context = PropagationContext::new(
                &mut trailed_values,
                &mut assignments,
                &mut reason_store,
                &mut notification_engine,
                PropagatorId(0),
            );

            let result = context.post(
                predicate![domain >= 2],
                (
                    conjunction!(),
                    &InferenceCode::unknown_label(ConstraintTag::create_from_index(0)),
                ),
            );
            assert!(result.is_ok());
        }
        assert_eq!(reason_store.len(), 0);
    }

    #[test]
    fn test_no_update_reason_store_if_no_update_upper_bound() {
        let mut assignments = Assignments::default();
        let mut trailed_values = TrailedValues::default();
        let domain = assignments.grow(5, 10);

        let mut reason_store = ReasonStore::default();

        assert_eq!(reason_store.len(), 0);
        {
            let mut notification_engine = NotificationEngine::default();
            let mut context = PropagationContext::new(
                &mut trailed_values,
                &mut assignments,
                &mut reason_store,
                &mut notification_engine,
                PropagatorId(0),
            );

            let result = context.post(
                predicate![domain <= 15],
                (
                    conjunction!(),
                    &InferenceCode::unknown_label(ConstraintTag::create_from_index(0)),
                ),
            );
            assert!(result.is_ok());
        }
        assert_eq!(reason_store.len(), 0);
    }

    #[test]
    fn test_no_update_reason_store_if_no_update_remove() {
        let mut assignments = Assignments::default();
        let mut trailed_values = TrailedValues::default();
        let domain = assignments.grow(5, 10);

        let mut reason_store = ReasonStore::default();

        assert_eq!(reason_store.len(), 0);
        {
            let mut notification_engine = NotificationEngine::default();
            let mut context = PropagationContext::new(
                &mut trailed_values,
                &mut assignments,
                &mut reason_store,
                &mut notification_engine,
                PropagatorId(0),
            );

            let result = context.post(
                predicate![domain != 15],
                (
                    conjunction!(),
                    &InferenceCode::unknown_label(ConstraintTag::create_from_index(0)),
                ),
            );
            assert!(result.is_ok());
        }
        assert_eq!(reason_store.len(), 0);
    }
}