Function can_dig_channel

plugins/dig-now.cpp:253–260

}

static bool can_dig_channel(df::tiletype tt) {
    df::tiletype_shape shape = tileShape(tt);
    return shape != df::tiletype_shape::EMPTY &&
        shape != df::tiletype_shape::ENDLESS_PIT &&
        shape != df::tiletype_shape::NONE &&
        shape != df::tiletype_shape::RAMP_TOP &&
        shape != df::tiletype_shape::TRUNK_BRANCH;
}

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