明确定义包含或允许传播 [英] Explicitly defining includes or allowing propagation

问题描述

这是一个关于最佳实践的快速问题。假设我有以下文件：



啊

Bh

Ch



以下代码：



啊：

Hi,

Just a quick question regarding the best practice for this. Let's say I have the following files:

A.h
B.h
C.h

And the following code:

A.h:

class A
{
    
}

Bh：

B.h:

#include "A.h"

class B
{
private:
    A a;
}

Ch：

C.h:

#include "A.h" // ?
#include "B.h" 

class C
{
private:
    A a;
    B b;
}

由于C包含B而B包含A，这意味着C可以访问A.但是，如您所需由于对编译时间有潜在的巨大影响，要小心C ++标题，明确说C包含A还是允许它通过B传播它会更好？



虽然更多的标题意味着更混乱，但我宁愿明确定义它是否可以作为改善编译时间的捷径。



我有什么尝试过：



没什么，只是征求意见。

As C includes B and B includes A, that means C can access A. However, as you need to be careful with C++ headers due to the potentially massive impact on compilation time, would it be better to explicitly say that C includes A, or allow it to propagate that via B?

Although more headers means more clutter, I'd rather explicitly define it if it will act as a shortcut to improve compilation time.

What I have tried:

Nothing, just asking for advice.

推荐答案

因为标题必须是无论如何防止多次包含，我认为没有对编译时间的相关影响（作为旁注，使用预编译的头来加速编译）。因此，在我看来，这只是个人品味的问题。

Since headers must be anyway guarded against multiple inclusion, I see no relevant impact on compilation time (as a side note, use precompiled headers to speed up compilation). Hence it is just matter of personal taste, in my opinion.

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