Function can_dig_up_down_stair

plugins/dig-now.cpp:283–288

}

static bool can_dig_up_down_stair(df::tiletype tt) {
    df::tiletype_shape shape = tileShape(tt);
    return shape == df::tiletype_shape::WALL ||
        shape == df::tiletype_shape::FORTIFICATION ||
        shape == df::tiletype_shape::STAIR_UP;
}

static bool can_dig_ramp(df::tiletype tt) {
    df::tiletype_shape shape = tileShape(tt);