add_edge

void libsemigroups::ActionDigraph::add_edge(node_type i, node_type j, label_type lbl)

Add an edge from i to j labelled lbl.

If i and j are nodes in this, and lbl is in the range [0, out_degree()), then this method adds an edge edge from i to j labelled lbl.

Return

(None)

Complexity

Constant.

Parameters

• i: the source node

• j: the range node

• lbl: the label of the edge from i to j

Exceptions

• LibsemigroupsException: if i, j, or lbl is not valid. If an exception is thrown, this is guaranteed not to be modified (strong exception guarantee).