Function deserialize

plugins/buildingplan/buildingtypekey.cpp:20–29

        : tuple(type, subtype, custom) { }

static BuildingTypeKey deserialize(color_ostream &out, const std::string &serialized) {
    vector<string> key_parts;
    split_string(&key_parts, serialized, ",");
    if (key_parts.size() != 3) {
        WARN(control,out).print("invalid key_str: '{}'\n", serialized);
        return BuildingTypeKey(df::building_type::NONE, -1, -1);
    }
    return BuildingTypeKey((df::building_type)string_to_int(key_parts[0]),
                        string_to_int(key_parts[1]), string_to_int(key_parts[2]));
}

BuildingTypeKey::BuildingTypeKey(color_ostream &out, const std::string &serialized)
        :tuple(deserialize(out, serialized)) { }