Function count_isomorphisms_vf2 

pub fn count_isomorphisms_vf2(
    graph1: &Graph,
    graph2: &Graph,
    vertex_color1: Option<&[u32]>,
    vertex_color2: Option<&[u32]>,
    edge_color1: Option<&[u32]>,
    edge_color2: Option<&[u32]>,
) -> IgraphResult<u64>

Count the number of VF2 isomorphic mappings between two graphs.

Calling this with the same graph as both arguments counts the graph’s automorphisms. Colour arguments behave as in isomorphic_vf2.

Errors

Same conditions as isomorphic_vf2.

Examples

use rust_igraph::{Graph, count_isomorphisms_vf2};

// A 4-cycle has 8 automorphisms (4 rotations x 2 reflections).
let mut g = Graph::new(4, false).unwrap();
g.add_edge(0, 1).unwrap();
g.add_edge(1, 2).unwrap();
g.add_edge(2, 3).unwrap();
g.add_edge(3, 0).unwrap();
let count = count_isomorphisms_vf2(&g, &g, None, None, None, None).unwrap();
assert_eq!(count, 8);