是否有可能定义一个局部结构，在方法中，在C＃中？ [英] Is it possible to define a local struct, within a method, in C#?

问题描述

一个常见的​​编程的最佳实践是定义变量接近的地方，它们被用作可能的。

One of the common programming best practices is "define variables as close to where they are used as possible".

我用结构经常去创建那几乎是自我记录的地方。然而，C＃迫使我定义的方法之外的结构。这打破了上述的最佳实践 - 它基本上是创建一个无用的全局变量类型为整个类

I use structs frequently to create code thats almost self documenting in places. However, C# forces me to define the struct outside the method. This breaks the aforementioned best practice - its basically creating an unwanted global variable type for the entire class.

是否有可能定义一个局部结构的方法里面，就像局部变量，如果没有，你可以给我一个窗户进入的原因，C＃设计者决定防止？

Is it possible to define a local struct inside a method, just like a local variable, and if not, could you give me a window into the reasons the C# designers decided to prevent this?

我使用的方法中的结构来存储在一个有组织的方式临时信息，而不必诉诸数百独立变量。我转换部分的电子表格到C＃代码。

I'm using the struct within the method to store temporary information in an organized manner, without having to resort to hundreds of separate variables. I'm converting part of a spreadsheet into C# code.

显然，这将是在C＃7.0的特征

Apparently, this will be a feature in C# 7.0.

所以C＃编译器团队一致 - 哇！

So the C# compiler team agreed - wow!

推荐答案

我相信这是不允许的方法中定义命名类型。至于为什么，我不得不猜测。如果一个类型是不会被外界使用，那么它的存在很可能是没有道理的。

I believe it's not permitted to define named types within a method. As to why, I'll have to speculate. If a type is not going to be used outside, then its existence probably cannot be justified.

但是，您可以定义一个方法中匿名类型的变量。它会有点像结构。妥协。

You can however define anonymous type variables within a method. It will somewhat resembles structures. A compromise.

public void SomeMethod ()
{
    var anonymousTypeVar = new { x = 5, y = 10 };
}

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