如何在C＃中接近不可为空的引用类型？ [英] How can I get close to non-nullable reference types in C# today?

问题描述

我阅读了许多不可为空的问题和答案。看起来像是在C＃（4.0）中接近非可空类型的最好方法是Jon Skeet的 NonNullable<> hack。

I've read many of the non-nullable questions and answers. It looks like the best way to get close to non-nullable types in C# (4.0) is Jon Skeet's NonNullable<> hack.

但是，似乎C ++ / CLI已经解决了很多问题， ： Foo％（而不是原生C ++ Foo& ）。编译器通过向参数中添加 modreq（IsImplicitlyDereferenced）来实现这一功能。尝试从C＃调用这样的函数导致：

However, it seems that C++/CLI has solved much of the problem by supporting managed references: Foo% (instead of native C++ Foo&). The compiler makes this work by adding modreq(IsImplicitlyDereferenced) to the argument. Trying to call such a function from C# results in:

'<FunctionName>' is not supported by the language

有没有什么比 NonNullable<> 好吗？

有任何方法（合理 - 即，使用反射）调用C ++ / CLI方法 Foo :: Method（Bar％）从C＃开始？

Is there any way to (reasonably--i.e., w/o using reflection) call a C++/CLI method Foo::Method(Bar%) from C#?

[edit] 似乎目前没有比 > NonNullable<> ...我希望我会对C ++ / CLI的一些意见，因为它已经至少有一个部分解决方案。

[edit] It seems there is currently nothing better than NonNullable<>...I wish I would have gotten some comments on the C++/CLI stuff as it already has at least a partial solution.

推荐答案

我遇到过几次...我还没有找到比Skeet的解决方案更好的东西。它解决了我遇到的所有情况，所以我必须给它我的投票。

I've run into this a few times...I've yet to find anything better than Skeet's solution. It's solved all the cases I've come across, so I have to give it my vote.

我同意这是一个有点怪异的情况，我们必须诉诸但是他的修复确实解决了这个问题。

I agree it's a bit of a hacky situation that we have to resort to that...but his fix does solve the problem.

这篇关于如何在C＃中接近不可为空的引用类型？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！