unsafe_neighbor

node_type libsemigroups::ActionDigraph::unsafe_neighbor(node_type v, label_type lbl) const

Get the range of the edge with source node v and edge-label lbl.

This function guarantees not to throw a

LibsemigroupsException.

Return

Returns the node adjacent to v via the edge labelled lbl, or libsemigroups::UNDEFINED; both are values of type ActionDigraph::node_type.

Complexity

Constant.

Parameters

• v: the node

• lbl: the label

Warning

This function is unsafe because it does not verify v or lbl is valid.