C ++ getters / setters编码风格 [英] C++ getters/setters coding style

问题描述

我已经在C＃编程了一段时间，现在我想刷新我的C ++技能。

I have been programming in C# for a while and now I want to brush up on my C++ skills.

拥有类：

class Foo
{
    const std::string& name_;
    ...
};

什么是最好的方法（我只想允许读取访问name_字段）：

What would be the best approach (I only want to allow read access to the name_ field):

• 使用getter方法： inline const std :: string& name（）const {return name_; }



感谢。

推荐答案

将非const字段公开是一个坏主意，因为它很难强制错误检查

It tends to be a bad idea to make non-const fields public because it then becomes hard to force error checking constraints and/or add side-effects to value changes in the future.

在你的情况下，你有一个const字段，所以上面的问题不是问题。使它成为公共领域的主要缺点是，你锁定了底层的实现。例如，如果将来你想将内部表示更改为C字符串或Unicode字符串，或其他，那么你会破坏所有的客户端代码。使用gettor，您可以转换为现有客户的旧版表示，同时通过新的gettor为新用户提供更新的功能。

In your case, you have a const field, so the above issues are not a problem. The main downside of making it a public field is that you're locking down the underlying implementation. For example, if in the future you wanted to change the internal representation to a C-string or a Unicode string, or something else, then you'd break all the client code. With a gettor, you could convert to the legacy representation for existing clients while providing the newer functionality to new users via a new gettor.

我仍然建议使用getter方法就像你放置在上面。这将最大限度地提高您未来的灵活性。

I'd still suggest having a getter method like the one you have placed above. This will maximize your future flexibility.

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