Struct petgraph::stable_graph::StableGraph[][src]

pub struct StableGraph<N, E, Ty = Directed, Ix = DefaultIx> { /* fields omitted */ }

StableGraph<N, E, Ty, Ix> is a graph datastructure using an adjacency list representation.

The graph does not invalidate any unrelated node or edge indices when items are removed.

StableGraph is parameterized over:

The graph uses O(|V| + |E|) space, and allows fast node and edge insert and efficient graph search.

It implements O(e’) edge lookup and edge and node removals, where e’ is some local measure of edge count.

Depends on crate feature stable_graph (default). Stable Graph is still missing a few methods compared to Graph. You can contribute to help it achieve parity.

Implementations

impl<N, E> StableGraph<N, E, Directed>[src]

pub fn new() -> Self[src]

Create a new StableGraph with directed edges.

This is a convenience method. See StableGraph::with_capacity or StableGraph::default for a constructor that is generic in all the type parameters of StableGraph.

impl<N, E, Ty, Ix> StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

pub fn with_capacity(nodes: usize, edges: usize) -> Self[src]

Create a new StableGraph with estimated capacity.

pub fn capacity(&self) -> (usize, usize)[src]

Return the current node and edge capacity of the graph.

pub fn clear(&mut self)[src]

Remove all nodes and edges

pub fn clear_edges(&mut self)[src]

Remove all edges

pub fn node_count(&self) -> usize[src]

Return the number of nodes (vertices) in the graph.

Computes in O(1) time.

pub fn edge_count(&self) -> usize[src]

Return the number of edges in the graph.

Computes in O(1) time.

pub fn is_directed(&self) -> bool[src]

Whether the graph has directed edges or not.

pub fn add_node(&mut self, weight: N) -> NodeIndex<Ix>[src]

Add a node (also called vertex) with associated data weight to the graph.

Computes in O(1) time.

Return the index of the new node.

Panics if the StableGraph is at the maximum number of nodes for its index type.

pub fn remove_node(&mut self, a: NodeIndex<Ix>) -> Option<N>[src]

Remove a from the graph if it exists, and return its weight. If it doesn’t exist in the graph, return None.

The node index a is invalidated, but none other. Edge indices are invalidated as they would be following the removal of each edge with an endpoint in a.

Computes in O(e’) time, where e’ is the number of affected edges, including n calls to .remove_edge() where n is the number of edges with an endpoint in a.

pub fn contains_node(&self, a: NodeIndex<Ix>) -> bool[src]

pub fn add_edge(
    &mut self,
    a: NodeIndex<Ix>,
    b: NodeIndex<Ix>,
    weight: E
) -> EdgeIndex<Ix>
[src]

Add an edge from a to b to the graph, with its associated data weight.

Return the index of the new edge.

Computes in O(1) time.

Panics if any of the nodes don’t exist.
Panics if the StableGraph is at the maximum number of edges for its index type.

Note: StableGraph allows adding parallel (“duplicate”) edges.

pub fn update_edge(
    &mut self,
    a: NodeIndex<Ix>,
    b: NodeIndex<Ix>,
    weight: E
) -> EdgeIndex<Ix>
[src]

Add or update an edge from a to b. If the edge already exists, its weight is updated.

Return the index of the affected edge.

Computes in O(e’) time, where e’ is the number of edges connected to a (and b, if the graph edges are undirected).

Panics if any of the nodes don’t exist.

pub fn remove_edge(&mut self, e: EdgeIndex<Ix>) -> Option<E>[src]

Remove an edge and return its edge weight, or None if it didn’t exist.

Invalidates the edge index e but no other.

Computes in O(e’) time, where e’ is the number of edges connected to the same endpoints as e.

pub fn node_weight(&self, a: NodeIndex<Ix>) -> Option<&N>[src]

Access the weight for node a.

Also available with indexing syntax: &graph[a].

pub fn node_weight_mut(&mut self, a: NodeIndex<Ix>) -> Option<&mut N>[src]

Access the weight for node a, mutably.

Also available with indexing syntax: &mut graph[a].

pub fn node_weights_mut(&mut self) -> impl Iterator<Item = &mut N>[src]

Return an iterator yielding mutable access to all node weights.

The order in which weights are yielded matches the order of their node indices.

pub fn node_indices(&self) -> NodeIndices<'_, N, Ix>

Notable traits for NodeIndices<'a, N, Ix>

impl<'a, N, Ix: IndexType> Iterator for NodeIndices<'a, N, Ix> type Item = NodeIndex<Ix>;
[src]

Return an iterator over the node indices of the graph

pub fn edge_weight(&self, e: EdgeIndex<Ix>) -> Option<&E>[src]

Access the weight for edge e.

Also available with indexing syntax: &graph[e].

pub fn edge_weight_mut(&mut self, e: EdgeIndex<Ix>) -> Option<&mut E>[src]

Access the weight for edge e, mutably

Also available with indexing syntax: &mut graph[e].

pub fn edge_weights_mut(&mut self) -> impl Iterator<Item = &mut E>[src]

Return an iterator yielding mutable access to all edge weights.

The order in which weights are yielded matches the order of their edge indices.

pub fn edge_endpoints(
    &self,
    e: EdgeIndex<Ix>
) -> Option<(NodeIndex<Ix>, NodeIndex<Ix>)>
[src]

Access the source and target nodes for e.

pub fn edge_indices(&self) -> EdgeIndices<'_, E, Ix>

Notable traits for EdgeIndices<'a, E, Ix>

impl<'a, E, Ix: IndexType> Iterator for EdgeIndices<'a, E, Ix> type Item = EdgeIndex<Ix>;
[src]

Return an iterator over the edge indices of the graph

pub fn contains_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool[src]

Lookup if there is an edge from a to b.

Computes in O(e’) time, where e’ is the number of edges connected to a (and b, if the graph edges are undirected).

pub fn find_edge(
    &self,
    a: NodeIndex<Ix>,
    b: NodeIndex<Ix>
) -> Option<EdgeIndex<Ix>>
[src]

Lookup an edge from a to b.

Computes in O(e’) time, where e’ is the number of edges connected to a (and b, if the graph edges are undirected).

pub fn find_edge_undirected(
    &self,
    a: NodeIndex<Ix>,
    b: NodeIndex<Ix>
) -> Option<(EdgeIndex<Ix>, Direction)>
[src]

Lookup an edge between a and b, in either direction.

If the graph is undirected, then this is equivalent to .find_edge().

Return the edge index and its directionality, with Outgoing meaning from a to b and Incoming the reverse, or None if the edge does not exist.

pub fn neighbors(&self, a: NodeIndex<Ix>) -> Neighbors<'_, E, Ix>

Notable traits for Neighbors<'a, E, Ix>

impl<'a, E, Ix> Iterator for Neighbors<'a, E, Ix> where
    Ix: IndexType
type Item = NodeIndex<Ix>;
[src]

Return an iterator of all nodes with an edge starting from a.

  • Directed: Outgoing edges from a.
  • Undirected: All edges connected to a.

Produces an empty iterator if the node doesn’t exist.
Iterator element type is NodeIndex<Ix>.

Use .neighbors(a).detach() to get a neighbor walker that does not borrow from the graph.

pub fn neighbors_directed(
    &self,
    a: NodeIndex<Ix>,
    dir: Direction
) -> Neighbors<'_, E, Ix>

Notable traits for Neighbors<'a, E, Ix>

impl<'a, E, Ix> Iterator for Neighbors<'a, E, Ix> where
    Ix: IndexType
type Item = NodeIndex<Ix>;
[src]

Return an iterator of all neighbors that have an edge between them and a, in the specified direction. If the graph’s edges are undirected, this is equivalent to .neighbors(a).

  • Directed, Outgoing: All edges from a.
  • Directed, Incoming: All edges to a.
  • Undirected: All edges connected to a.

Produces an empty iterator if the node doesn’t exist.
Iterator element type is NodeIndex<Ix>.

Use .neighbors_directed(a, dir).detach() to get a neighbor walker that does not borrow from the graph.

pub fn neighbors_undirected(&self, a: NodeIndex<Ix>) -> Neighbors<'_, E, Ix>

Notable traits for Neighbors<'a, E, Ix>

impl<'a, E, Ix> Iterator for Neighbors<'a, E, Ix> where
    Ix: IndexType
type Item = NodeIndex<Ix>;
[src]

Return an iterator of all neighbors that have an edge between them and a, in either direction. If the graph’s edges are undirected, this is equivalent to .neighbors(a).

  • Directed and Undirected: All edges connected to a.

Produces an empty iterator if the node doesn’t exist.
Iterator element type is NodeIndex<Ix>.

Use .neighbors_undirected(a).detach() to get a neighbor walker that does not borrow from the graph.

pub fn edges(&self, a: NodeIndex<Ix>) -> Edges<'_, E, Ty, Ix>

Notable traits for Edges<'a, E, Ty, Ix>

impl<'a, E, Ty, Ix> Iterator for Edges<'a, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
type Item = EdgeReference<'a, E, Ix>;
[src]

Return an iterator of all edges of a.

  • Directed: Outgoing edges from a.
  • Undirected: All edges connected to a.

Produces an empty iterator if the node doesn’t exist.
Iterator element type is EdgeReference<E, Ix>.

pub fn edges_directed(
    &self,
    a: NodeIndex<Ix>,
    dir: Direction
) -> Edges<'_, E, Ty, Ix>

Notable traits for Edges<'a, E, Ty, Ix>

impl<'a, E, Ty, Ix> Iterator for Edges<'a, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
type Item = EdgeReference<'a, E, Ix>;
[src]

Return an iterator of all edges of a, in the specified direction.

  • Directed, Outgoing: All edges from a.
  • Directed, Incoming: All edges to a.
  • Undirected, Outgoing: All edges connected to a, with a being the source of each edge.
  • Undirected, Incoming: All edges connected to a, with a being the target of each edge.

Produces an empty iterator if the node a doesn’t exist.
Iterator element type is EdgeReference<E, Ix>.

pub fn externals(&self, dir: Direction) -> Externals<'_, N, Ty, Ix>

Notable traits for Externals<'a, N, Ty, Ix>

impl<'a, N: 'a, Ty, Ix> Iterator for Externals<'a, N, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
type Item = NodeIndex<Ix>;
[src]

Return an iterator over either the nodes without edges to them (Incoming) or from them (Outgoing).

An internal node has both incoming and outgoing edges. The nodes in .externals(Incoming) are the source nodes and .externals(Outgoing) are the sinks of the graph.

For a graph with undirected edges, both the sinks and the sources are just the nodes without edges.

The whole iteration computes in O(|V|) time.

pub fn index_twice_mut<T, U>(
    &mut self,
    i: T,
    j: U
) -> (&mut Self::Output, &mut Self::Output) where
    Self: IndexMut<T> + IndexMut<U>,
    T: GraphIndex,
    U: GraphIndex
[src]

Index the StableGraph by two indices, any combination of node or edge indices is fine.

Panics if the indices are equal or if they are out of bounds.

pub fn retain_nodes<F>(&mut self, visit: F) where
    F: FnMut(Frozen<'_, Self>, NodeIndex<Ix>) -> bool
[src]

Keep all nodes that return true from the visit closure, remove the others.

visit is provided a proxy reference to the graph, so that the graph can be walked and associated data modified.

The order nodes are visited is not specified.

The node indices of the removed nodes are invalidated, but none other. Edge indices are invalidated as they would be following the removal of each edge with an endpoint in a removed node.

Computes in O(n + e’) time, where n is the number of node indices and e’ is the number of affected edges, including n calls to .remove_edge() where n is the number of edges with an endpoint in a removed node.

pub fn retain_edges<F>(&mut self, visit: F) where
    F: FnMut(Frozen<'_, Self>, EdgeIndex<Ix>) -> bool
[src]

Keep all edges that return true from the visit closure, remove the others.

visit is provided a proxy reference to the graph, so that the graph can be walked and associated data modified.

The order edges are visited is not specified.

The edge indices of the removed edes are invalidated, but none other.

Computes in O(e’‘) time, e’ is the number of affected edges, including the calls to .remove_edge() for each removed edge.

pub fn from_edges<I>(iterable: I) -> Self where
    I: IntoIterator,
    I::Item: IntoWeightedEdge<E>,
    <I::Item as IntoWeightedEdge<E>>::NodeId: Into<NodeIndex<Ix>>,
    N: Default
[src]

Create a new StableGraph from an iterable of edges.

Node weights N are set to default values. Edge weights E may either be specified in the list, or they are filled with default values.

Nodes are inserted automatically to match the edges.

use petgraph::stable_graph::StableGraph;

let gr = StableGraph::<(), i32>::from_edges(&[
    (0, 1), (0, 2), (0, 3),
    (1, 2), (1, 3),
    (2, 3),
]);

pub fn map<'a, F, G, N2, E2>(
    &'a self,
    node_map: F,
    edge_map: G
) -> StableGraph<N2, E2, Ty, Ix> where
    F: FnMut(NodeIndex<Ix>, &'a N) -> N2,
    G: FnMut(EdgeIndex<Ix>, &'a E) -> E2, 
[src]

Create a new StableGraph by mapping node and edge weights to new values.

The resulting graph has the same structure and the same graph indices as self.

pub fn filter_map<'a, F, G, N2, E2>(
    &'a self,
    node_map: F,
    edge_map: G
) -> StableGraph<N2, E2, Ty, Ix> where
    F: FnMut(NodeIndex<Ix>, &'a N) -> Option<N2>,
    G: FnMut(EdgeIndex<Ix>, &'a E) -> Option<E2>, 
[src]

Create a new StableGraph by mapping nodes and edges. A node or edge may be mapped to None to exclude it from the resulting graph.

Nodes are mapped first with the node_map closure, then edge_map is called for the edges that have not had any endpoint removed.

The resulting graph has the structure of a subgraph of the original graph. Nodes and edges that are not removed maintain their old node or edge indices.

pub fn extend_with_edges<I>(&mut self, iterable: I) where
    I: IntoIterator,
    I::Item: IntoWeightedEdge<E>,
    <I::Item as IntoWeightedEdge<E>>::NodeId: Into<NodeIndex<Ix>>,
    N: Default
[src]

Extend the graph from an iterable of edges.

Node weights N are set to default values. Edge weights E may either be specified in the list, or they are filled with default values.

Nodes are inserted automatically to match the edges.

Trait Implementations

impl<N, E, Ty, Ix> Build for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<N, E, Ty, Ix: IndexType> Clone for StableGraph<N, E, Ty, Ix> where
    N: Clone,
    E: Clone
[src]

The resulting cloned graph has the same graph indices as self.

impl<N, E, Ty, Ix> Create for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<N, E, Ty, Ix> Data for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

type NodeWeight = N

type EdgeWeight = E

impl<N, E, Ty, Ix> DataMap for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<N, E, Ty, Ix> DataMapMut for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<N, E, Ty, Ix> Debug for StableGraph<N, E, Ty, Ix> where
    N: Debug,
    E: Debug,
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<N, E, Ty, Ix> Default for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

Create a new empty StableGraph.

impl<N, E, Ty, Ix> From<Graph<N, E, Ty, Ix>> for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

Convert a Graph into a StableGraph

Computes in O(|V| + |E|) time.

The resulting graph has the same node and edge indices as the original graph.

impl<N, E, Ty, Ix> From<StableGraph<N, E, Ty, Ix>> for Graph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

Convert a StableGraph into a Graph

Computes in O(|V| + |E|) time.

This translates the stable graph into a graph with node and edge indices in a compact interval without holes (like Graphs always are).

Only if the stable graph had no vacancies after deletions (if node bound was equal to node count, and the same for edges), would the resulting graph have the same node and edge indices as the input.

impl<N, E, Ty, Ix> FromElements for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<N, E, Ty, Ix> GetAdjacencyMatrix for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

The adjacency matrix for Graph is a bitmap that’s computed by .adjacency_matrix().

type AdjMatrix = FixedBitSet

The associated adjacency matrix type

impl<N, E, Ty, Ix> GraphBase for StableGraph<N, E, Ty, Ix> where
    Ix: IndexType
[src]

type NodeId = NodeIndex<Ix>

node identifier

type EdgeId = EdgeIndex<Ix>

edge identifier

impl<N, E, Ty, Ix> GraphProp for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

type EdgeType = Ty

The kind edges in the graph.

impl<N, E, Ty, Ix> Index<EdgeIndex<Ix>> for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

Index the StableGraph by EdgeIndex to access edge weights.

Panics if the edge doesn’t exist.

type Output = E

The returned type after indexing.

impl<N, E, Ty, Ix> Index<NodeIndex<Ix>> for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

Index the StableGraph by NodeIndex to access node weights.

Panics if the node doesn’t exist.

type Output = N

The returned type after indexing.

impl<N, E, Ty, Ix> IndexMut<EdgeIndex<Ix>> for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

Index the StableGraph by EdgeIndex to access edge weights.

Panics if the edge doesn’t exist.

impl<N, E, Ty, Ix> IndexMut<NodeIndex<Ix>> for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

Index the StableGraph by NodeIndex to access node weights.

Panics if the node doesn’t exist.

impl<'a, N: 'a, E: 'a, Ty, Ix> IntoEdgeReferences for &'a StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

type EdgeRef = EdgeReference<'a, E, Ix>

type EdgeReferences = EdgeReferences<'a, E, Ix>

fn edge_references(self) -> Self::EdgeReferences[src]

Create an iterator over all edges in the graph, in indexed order.

Iterator element type is EdgeReference<E, Ix>.

impl<'a, N, E, Ty, Ix> IntoEdges for &'a StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

type Edges = Edges<'a, E, Ty, Ix>

impl<'a, N, E, Ty, Ix> IntoEdgesDirected for &'a StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

type EdgesDirected = Edges<'a, E, Ty, Ix>

impl<'a, N, E: 'a, Ty, Ix> IntoNeighbors for &'a StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

type Neighbors = Neighbors<'a, E, Ix>

impl<'a, N, E: 'a, Ty, Ix> IntoNeighborsDirected for &'a StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

type NeighborsDirected = Neighbors<'a, E, Ix>

impl<'a, N, E: 'a, Ty, Ix> IntoNodeIdentifiers for &'a StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<'a, N, E, Ty, Ix> IntoNodeReferences for &'a StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<N, E, Ty, Ix> NodeCount for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

impl<N, E, Ty, Ix> NodeIndexable for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

fn node_bound(&self) -> usize[src]

Return an upper bound of the node indices in the graph

impl<N, E, Ty, Ix> Visitable for StableGraph<N, E, Ty, Ix> where
    Ty: EdgeType,
    Ix: IndexType
[src]

type Map = FixedBitSet

The associated map type

Auto Trait Implementations

impl<N, E, Ty, Ix> RefUnwindSafe for StableGraph<N, E, Ty, Ix> where
    E: RefUnwindSafe,
    Ix: RefUnwindSafe,
    N: RefUnwindSafe,
    Ty: RefUnwindSafe

impl<N, E, Ty, Ix> Send for StableGraph<N, E, Ty, Ix> where
    E: Send,
    Ix: Send,
    N: Send,
    Ty: Send

impl<N, E, Ty, Ix> Sync for StableGraph<N, E, Ty, Ix> where
    E: Sync,
    Ix: Sync,
    N: Sync,
    Ty: Sync

impl<N, E, Ty, Ix> Unpin for StableGraph<N, E, Ty, Ix> where
    E: Unpin,
    Ix: Unpin,
    N: Unpin,
    Ty: Unpin

impl<N, E, Ty, Ix> UnwindSafe for StableGraph<N, E, Ty, Ix> where
    E: UnwindSafe,
    Ix: UnwindSafe,
    N: UnwindSafe,
    Ty: UnwindSafe

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> Pointable for T[src]

type Init = T

The type for initializers.

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.