Method flatten

include/core/graph.h:87–101

Flatten the adjacency list to an edge list */

    /** Flatten the adjacency list to an edge list */
    virtual void flatten() {
        if (!edges.empty())
            return;

        size_t offset = 0;
        flat_offsets.resize(num_vertex);
        for (Index u = 0; u < num_vertex; u++) {
            for (auto &&vertex_edge : vertex_edges[u]) {
                edges.push_back(std::tuple_cat(std::tie(u), vertex_edge));
                edge_weights.push_back(std::get<1>(vertex_edge));
            }
            flat_offsets[u] = offset;
            offset += vertex_edges[u].size();
        }
    }

    virtual inline std::string name() const {
        std::stringstream ss;