class vs namespace？ [英] class vs namespace?
问题描述
大家好，
我们有一些现有的类要放入另一个
类或命名空间，这样我们就可以避免了命名冲突。至于
从使用角度来看，我可以看到语法相同。
有没有人对此有任何意见？
谢谢
Dean
Hi all,
We have a few existing classes that we want to put into either another
class or a namespace, so that we can avoid naming conflicts. As far as
I can see the syntax is identical from a usage perspective.
Does anyone have an opinion on this either way?
Thanks
Dean
推荐答案
dean< de *********@yahoo.comwrote:
dean <de*********@yahoo.comwrote:
大家好，
我们现有几个我们想要放入另一个类b $ b类或命名空间的类，以便我们可以避免命名冲突。至于
从使用角度来看，我可以看到语法相同。
有没有人对此有任何意见？
Hi all,
We have a few existing classes that we want to put into either another
class or a namespace, so that we can avoid naming conflicts. As far as
I can see the syntax is identical from a usage perspective.
Does anyone have an opinion on this either way?
为了您的目的，命名空间是可行的方法。您可以重新打开
命名空间并在翻译单元之间添加内容。你不能用课程来做这个
。此外，使用类意味着您可以创建该类的
实例，据我所知，情况并非如此。
hth
-
jb
（rot13中的回复地址，先解读）
For your purpose, namespaces are the way to go. You can reopen a
namespace and add stuff across translation units. You cannot do this
with classes. In addition, using a class implies that you can create an
instance of that class, which, as I understood it, is not the case.
hth
--
jb
(reply address in rot13, unscramble first)
Jakob Bieling写道：
Jakob Bieling wrote:
dean< de ********* @ yahoo.comwrote：
dean <de*********@yahoo.comwrote:
>大家好，
我们有一些现有的类，我们想要放入另一个类或命名空间，这样我们就可以避免命名冲突。至于
从使用角度来看，我可以看到语法是相同的。
有没有人对此有任何意见？
>Hi all,
We have a few existing classes that we want to put into either another
class or a namespace, so that we can avoid naming conflicts. As far as
I can see the syntax is identical from a usage perspective.
Does anyone have an opinion on this either way?
为了您的目的，命名空间是可行的方法。您可以重新打开
命名空间并在翻译单元之间添加内容。你不能用课程来做这个
。此外，使用类意味着您可以创建该类的
实例，据我所知，实例并非如此。
For your purpose, namespaces are the way to go. You can reopen a
namespace and add stuff across translation units. You cannot do this
with classes. In addition, using a class implies that you can create an
instance of that class, which, as I understood it, is not the case.
此外，您可以使用带有名称空间的using声明，以及使用类可能不是
的AFAIK，至少不是你不是从他们那里得到的。
Also, you can use using-declarations with namespaces, and AFAIK that''s not
possible with classes, at least not if you don''t derive from them.
那么如果我们使用
$ b $那么该如何处理该类的成员变量b命名空间代替？我的意思是，如何隐藏私有变量并且只允许
允许访问器（获取和设置）功能？将成员变量放在命名空间的
之外但与命名空间位于同一单位？
Rolf Magnus写道：
So what to do about member variables of the class, if we use a
namespace instead? I mean, how can one hide a private variable and just
allow accessor (get and set) functions? Put the member variable outside
of the namespace but in the same unit as the namespace?
Rolf Magnus wrote:
Jakob Bieling写道：
Jakob Bieling wrote:
dean< de ********* @ yahoo.comwrote：
dean <de*********@yahoo.comwrote:
大家好，
我们有一些现有的类，我们想把它们放到另一个
类或命名空间中，所以我们可以避免命名冲突。至于
从使用角度来看，我可以看到语法相同。
有没有人对此有任何意见？
Hi all,
We have a few existing classes that we want to put into either another
class or a namespace, so that we can avoid naming conflicts. As far as
I can see the syntax is identical from a usage perspective.
Does anyone have an opinion on this either way?
为了您的目的，命名空间是可行的方法。您可以重新打开
命名空间并在翻译单元之间添加内容。你不能用课程来做这个
。此外，使用类意味着您可以创建该类的
实例，据我所知，实例并非如此。
For your purpose, namespaces are the way to go. You can reopen a
namespace and add stuff across translation units. You cannot do this
with classes. In addition, using a class implies that you can create an
instance of that class, which, as I understood it, is not the case.
另外，你可以使用带有命名空间的using声明，而AFAIK可以使用类，而不是
可以使用类，至少不是你不是从他们那里得到的。
Also, you can use using-declarations with namespaces, and AFAIK that''s not
possible with classes, at least not if you don''t derive from them.
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