const d = dist[curr.row][curr.col] +
            grid[dr][dc];

        const d = dist[curr.row][curr.col] + grid[dr][dc];

            dist[dr][dc] = d;

            // XXX: queue.update() needs == operator, which does not work with
            // structs. We just grow the queue bigger and bigger...

            dist[dr][dc] = d;

        const d = dist[curr.row][curr.col] +
            grid[dr][dc];

        const d = dist[curr.row][curr.col] + grid[dr][dc];

            dist[dr][dc] = d;

            // XXX: queue.update() needs == operator, which does not work with
            // structs. We just grow the queue bigger and bigger...
            // queue.update(Point{ .row = dr, .col = dc, .cost = dist[dr][dc] }, Point{ .row = dr, .col = dc, .cost = d }) catch |err| switch (err) {

            // queue.update(
            //     Point{ .row = dr, .col = dc, .cost = dist[dr][dc] },
            //     Point{ .row = dr, .col = dc, .cost = d },
            // ) catch |err| switch (err) {

            dist[dr][dc] = d;