C#7局部函数:允许使用属性/方面吗? [英] C# 7 Local Functions: are attributes / aspects allowed?

问题描述

C#7引入了局部功能(太好了！).假设我有以下代码:

C# 7 introduced local functions (which is great!). Suppose I have the following code:

    using System;
    using PostSharp.Aspects;

    namespace AspectCS7
    {
        class Program
        {
            private static void Main()
            {
                [MyAspect]            
                void LocalFunction()
                {
                    Console.WriteLine("Hello Aspect!");
                }

                LocalFunction();
            }
        }

        [Serializable]
        public class MyAspect : OnMethodBoundaryAspect
        {
            public override void OnEntry(MethodExecutionArgs args)
            {
                Console.WriteLine("Entering Aspect");
            }
        }
    }

此代码显示编译时错误.可以将属性应用于局部函数吗?

This code shows compile-time errors. Is it possible to apply attributes to local functions?

推荐答案

在某一点允许在本地函数上使用属性.在本地有一些网络上的示例使用属性的函数，但是不再允许使用它们.

Attributes were allowed on local functions at one point. There are some examples on the web of local functions using attributes, however they're not allowed anymore.

更新: 这是有关此主题的正在进行的讨论: https://github.com/dotnet/csharplang/issues/794 .

Update: Here is an ongoing discussion on this topic: https://github.com/dotnet/csharplang/issues/794.

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