mapping is not possible when a node has no neighbors #995
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mtreinish
reviewed
Oct 5, 2023
rustworkx-core/src/token_swapper.rs
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| .neighbors(id_node) | ||
| .collect::<Vec<G::NodeId>>() | ||
| .is_empty() |
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| .neighbors(id_node) | |
| .collect::<Vec<G::NodeId>>() | |
| .is_empty() | |
| .neighbors(id_node) | |
| .next() | |
| .is_some() |
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Oh, this is how one can directly check whether an iterator is empty or non-empty, I was wondering about that. Fixed in d682b9b.
mtreinish
approved these changes
Oct 6, 2023
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Fixes #994.
I believe that the function
add_token_edges(node)should returnErr(MapNotPossible {})when no mapping exists. This was already handled in the case thatnodehad at least one neighbor. Now I am also returning the error in the case a node has no neighbors.