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feat: stateful integer #125
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ImkoMarijnissen
commented
Dec 17, 2024
pumpkin-solver/src/engine/conflict_analysis/conflict_analysis_context.rs
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ImkoMarijnissen
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Dec 17, 2024
ImkoMarijnissen
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Dec 17, 2024
ImkoMarijnissen
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Dec 17, 2024
maartenflippo
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Feb 3, 2025
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My only gripe now is the name. The name StatefulAssignment
and StatefulTrail
and StatefulInt
is not super clear. Perhaps TrailedInt
, IntTrail
, TrailedIntAssignment
are better?
maartenflippo
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Feb 4, 2025
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A well-known concept in CP is variables which are automatically updated to their previous values by the solver.
This PR (based on this PR) aims to implement these variables by creating a new trail for changes to these stateful variables. Upon backtracking, these changes are undone.
As a potential application area, I have implemented it in the
LinearLeq
propagator such that it does not have to recalculate the incremental state from scratch.