c ++，cpplint问题中if（pointer）与if（pointer！= NULL）之间的区别 [英] difference between if(pointer) vs if(pointer != NULL) in c++, cpplint issue
问题描述
我已经检查了此帖子可以使用（指针）而不是if（指针！= NULL）？和网上的其他帖子。
I already checked this post Can I use if (pointer) instead of if (pointer != NULL)? and some other posts on net.
但它并未说明两个语句之间的任何区别。
But it is not stating any difference between two statements.
问题：：当我在cpp代码上运行cpplint.py时，发现了检查指针是否为NULL的问题。
我更喜欢使用简单的
Problem: As I run cpplint.py on my cpp code, I found issues where I check pointers for NULL. I preferred to check using simple
if(pointer) //statement1
，但 cpplint 说，您应该像
if(pointer != NULL) //statement2
所以我只是想知道， statement2 相对于 statement1 有什么好处吗？ statement1 在某些情况下可能会造成问题吗？
So I just want to know , Are there any benefits of statement2 over statement1 ? Are there some scenarios in which statement1 may create problem ?
工作方式：据我所知，这两种陈述在工作上均没有差异。
Working: As per my knowledge there is no difference in working of both statements. Its just a change of coding style.
我更喜欢像 statement1 这样使用，因为
I prefer to use like statement1, because
- 简单易读
- 没有因平等而误失的思绪（
=）==）进行比较
- Its Simple, Readable
- No Tension of missing (
=) by mistake over equality(==) in a comparison
但是cpplint提出了这个问题，那么也许我错过了一些好处。
But cpplint is raising this as issue, then there might be some benefit that I missed.
注意： Java也不支持 statement1 。
Note: Java also doesn't support statement1.
推荐答案
否，如果 pointer 是实际上，指针类型没有区别，因此这里的所有内容都是编码风格的问题。反过来，编码风格取决于不同社区的习惯，因此不会有一般性建议。
No, if pointer is really a pointer type there is no difference, so everything here is a question of coding style. Coding style in turn depends on habits in different communities so there can't be a general recommendation.
我个人更喜欢第一个，因为它更短，更切合实际，避免使用伪宏 NULL 。
I personally prefer the first because it is shorter and more to the point and avoids the use of the bogus macro NULL.
在C中 NULL 可以是非常不同的东西（整数或指针），在C ++中，如今甚至不建议使用它。您至少应该在那里使用 nullptr 。
In C NULL can be very different things (integer or pointer) and in C++ its use is even deprecated nowadays. You should at least use nullptr, there.
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