.net C++/CLI 中的插入符号 ('^') 是什么意思？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/202463/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
What does the caret (‘^’) mean in C++/CLI?
提问by Owen
I just came across this code and a few Google searches turn up no explanation of this mysterious (to me) syntax.
我刚刚遇到了这段代码，一些谷歌搜索没有解释这种神秘的（对我来说）语法。
Hashtable^ tempHash = gcnew Hashtable(iterators_);
IDictionaryEnumerator^ enumerator = tempHash->GetEnumerator();
What the heck does the caret mean? (The gcnewis also new to me, and I asked about that here.)
插入符号到底是什么意思？（这gcnew对我来说也是新的，我在这里问过这个。）
采纳答案by Rob Walker
This is C++/CLIand the caret is the managed equivalent of a * (pointer) which in C++/CLI terminology is called a 'handle'to a 'reference type' (since you can still have unmanaged pointers).
这是C++/CLI，插入符号是 *（指针）的托管等价物，在 C++/CLI 术语中，它被称为“引用类型”的“句柄”（因为您仍然可以拥有非托管指针）。
(Thanks to Aardvark for pointing out the better terminology.)
（感谢 Aardvark 指出更好的术语。）
回答by salomon
// here normal pointer
P* ptr = new P; // usual pointer allocated on heap
P& nat = *ptr; // object on heap bind to native object
//.. here CLI managed
MO^ mngd = gcnew MO; // allocate on CLI heap
MO% rr = *mngd; // object on CLI heap reference to gc-lvalue
In general, the punctuator %is to ^as the punctuator &is to *. In C++ the unary &operator is in C++/CLI the unary %operator.
通常，标点符号%to^就像标点符号&to 一样*。在 C++ 中，一元运算&符在 C++/CLI 中是一元运算%符。
While &ptryields a P*, %mngdyields at MO^.
虽然&ptr产生 a P*，但%mngd产生于MO^。
回答by Franci Penov
It means that this is a reference to a managed object vs. a regular C++ pointer. Objects behind such references are managed by the runtime and can be relocated in the memory. They are also garbage-collected automatically.
这意味着这是对托管对象与常规 C++ 指针的引用。此类引用背后的对象由运行时管理并可在内存中重新定位。它们也会自动进行垃圾收集。
回答by Joel Coehoorn
When you allocated managed memory, that memory can be moved around by the garbage collector. The ^ operator is a pointer for managed memory, that continues to point to the correctplace even if the garbage collector moves the object it points to.
当您分配托管内存时，垃圾收集器可以移动该内存。^ 运算符是托管内存的指针，即使垃圾收集器移动了它指向的对象，它也会继续指向正确的位置。
回答by Jon Tackabury
From MSDN, it looks like the caret means you are getting a handle to the type being created.
从 MSDN，它看起来像插入符号意味着您正在获取正在创建的类型的句柄。
回答by Mark Ingram
In C++/CLI it means a managed pointer. You can read more about it (and other C++/CLI features) here:
在 C++/CLI 中，它表示托管指针。您可以在此处阅读有关它（以及其他 C++/CLI 功能）的更多信息：
回答by 1800 INFORMATION
It means that it is a reference to a managed object.
这意味着它是对托管对象的引用。
