C++ moSTLy 冗余默认和参数化构造函数违反 DRY

Question

(在 Visual Studio 中使用 C++)

我有以下用于创建宇宙飞船对象的默认构造函数:

Ship() // default constructor
{
    name = "[ship unnamed]";
    length = 1000;
    width = 500;
    power = 100;

    vector<int> temp = { 100, 100 }; // { current health, maximum health}

    bridge = temp;
    sensor_arrays.push_back(temp); // 2 sensor arrays
    sensor_arrays.push_back(temp);
    for (int i = 0; i < 12; i++) // create 12 each
    {
        lasers.push_back(temp);
        heavy_lasers.push_back(temp);
        strike_fighters.push_back(temp);
        strike_bombers.push_back(temp);
    }
}

然后我有以下参数化构造函数用于创建给定名称的船:

Ship(string custom_name)
{
    name = custom_name;
    length = 1000;
    width = 500;
    power = 100;

    vector<int> temp = { 100, 100 }; // { current health, maximum health}

    bridge = temp;
    sensor_arrays.push_back(temp); // 2 sensor arrays
    sensor_arrays.push_back(temp);
    for (int i = 0; i < 12; i++) // create 12 each
    {
        lasers.push_back(temp);
        heavy_lasers.push_back(temp);
        strike_fighters.push_back(temp);
        strike_bombers.push_back(temp);
    }
}

只更改了一行，因此这似乎违反了 DRY。

我可以只使用默认构造函数，然后手动更改我需要的内容，但我希望拥有一个或多个参数化构造函数，而无需重复相同的代码行。有什么方法可以做到这一点吗？

Answer 1

您可以使用以下其中一项:

explicit Ship(const std::string& custom_name = "[ship unnamed]") {/*your code*/}

或

Ship() : Ship("[ship unnamed]") {} // delegate constructor, require C++11
explicit Ship(const std::string& custom_name) {/*your code*/}