在 C++ 中共享相同名称的类和命名空间
假设我在命名空间abc"中有一个名为foo"的类...
Let's say I have a class called 'foo' in namespace "abc"...
namespace abc {
class foo {
int a;
int b;
};
}
...然后说我在不同的命名空间中有另一个名为abc"的类
...and then say I have another class called "abc" in a different namespace
#include "foo.h"
namespace foo {
class abc {
abc::a = 10;
};
}
abc::a 不会是已定义类型,因为它将搜索类 abc,而不是命名空间 abc.我将如何正确引用另一个命名空间中的对象,其中另一个命名空间与我所在的类具有相同的名称?
abc::a would not be a defined type, because it would be searching class abc, not namespace abc. How would I go about properlly referencing an object in another namespace, wherein that other namespace had the same name as the class I'm in?
推荐答案
可以使用::abc::xx
,即将变量或类型标识为其绝对命名空间路径.如果您不指定绝对名称,则相对名称在包括命名空间/类中开始向上.
You can use ::abc::xx
, that is, identify the variable or type as its absolute namespace path. If you don't specify an absolute name, relative names start going upwards in the including namespaces/classes.
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