私有类函数vs未命名的命名空间中的函数 [英] Private class functions vs Functions in unnamed namespace

问题描述

我发现自己，我倾向于没有私人类函数。如果可能，所有候选人私人类函数，而不是我把未命名的命名空间，并传递所有必要的信息作为函数参数。我没有一个健全的解释为什么我这样做，但至少它看起来更自然地对我。因此，我需要在头文件中显示更少的内部细节。

您的意见是什么 - 是正确的做法吗？

只是说不，并隐藏cpp文件中的私有。

如果我将在一个大型c ++项目上开始新的项目，我将强制使用PIMPL Idiom： http://c2.com/cgi/wiki?PimplIdiom 将更多的私人详细信息移动到cpp文件中。

I've found myself that I tend not to have private class functions. If possible, all candidates to private class function rather I put in to unnamed namespace and pass all necessary information as function parameters. I don't have a sound explanation why I'm doing that but at least it looks more naturally to me. As a consequence I need to expose less internal details in the header file.

What is your opinion - is it correct practice?

解决方案

In the semi large projects where I usually work (more than 2 million lines of code) I would ban private class functions if I could. The reason being that a private class function is private but yet it's visible in the header file. This means if I change the signature (or the comment) in anyway I'm rewarded sometimes with a full recompile which costs several minutes (or hours depending on the project).

Just say no to that and hide what's private in the cpp file.

If I would start fresh on a large c++ project I would enforce PIMPL Idiom: http://c2.com/cgi/wiki?PimplIdiom to move even more private details into the cpp file.

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