weavatrix_graph/payload/stable_undirected/
view.rs

1use super::core::StableUndirectedPayloadGraph;
2use crate::{
3    EdgeEndpoints, IndexUndirectedGraphView, StableEdgeKey, StableNodeKey, UndirectedGraphView,
4};
5
6impl<NodePayload, EdgePayload> UndirectedGraphView
7    for StableUndirectedPayloadGraph<NodePayload, EdgePayload>
8{
9    type Node = StableNodeKey;
10    type Edge = StableEdgeKey;
11
12    fn node_count(&self) -> usize {
13        self.node_count()
14    }
15
16    fn edge_count(&self) -> usize {
17        self.edge_count()
18    }
19
20    fn contains_node(&self, node: Self::Node) -> bool {
21        self.node(node).is_some()
22    }
23
24    fn contains_edge(&self, edge: Self::Edge) -> bool {
25        self.edge(edge).is_some()
26    }
27
28    fn node_indices(&self) -> impl Iterator<Item = Self::Node> + '_ {
29        self.nodes().map(|pair| pair.0)
30    }
31
32    fn edge_indices(&self) -> impl Iterator<Item = Self::Edge> + '_ {
33        self.edges().map(|pair| pair.0)
34    }
35
36    fn edge_endpoints(&self, edge: Self::Edge) -> Option<EdgeEndpoints<Self::Node>> {
37        self.edge_endpoints(edge)
38    }
39
40    fn incident_edges(
41        &self,
42        node: Self::Node,
43    ) -> impl DoubleEndedIterator<Item = Self::Edge> + ExactSizeIterator + '_ {
44        self.incident_edges(node)
45    }
46}
47
48impl<NodePayload, EdgePayload> IndexUndirectedGraphView
49    for StableUndirectedPayloadGraph<NodePayload, EdgePayload>
50{
51    fn node_bound(&self) -> usize {
52        self.nodes.len()
53    }
54
55    fn edge_bound(&self) -> usize {
56        self.edges.len()
57    }
58
59    fn node_slot(node: Self::Node) -> usize {
60        node.index()
61    }
62
63    fn edge_slot(edge: Self::Edge) -> usize {
64        edge.index()
65    }
66
67    fn incident_edge_at(&self, node: Self::Node, offset: usize) -> Option<Self::Edge> {
68        let degree = self.node_slot(node)?.degree;
69        if offset >= degree {
70            return None;
71        }
72        if offset <= degree / 2 {
73            self.incident_edges(node).nth(offset)
74        } else {
75            self.incident_edges(node).nth_back(degree - offset - 1)
76        }
77    }
78}
weavatrix_graph/payload/stable_undirected/view.rs

weavatrix_graph/payload/stable_undirected/
view.rs
