Function Can_dig_down

src/dungeon.c:1648–1654

}

boolean
Can_dig_down(d_level *lev)
{
    return (boolean) (!svl.level.flags.hardfloor
                      && !Is_botlevel(lev)
                      && !Invocation_lev(lev));
}

/*
 * Like Can_dig_down (above), but also allows falling through on the