使用Lambda运算符的C#方法声明 [英] C# method declarations using the lambda operator

问题描述

在研究 C#运算符重载时，我偶然发现了MSDN网站上的代码:

While researching C# operator overloading, I stumbled across this block of code on the MSDN web site:

public static Complex operator +(Complex c1, Complex c2) =>
    new Complex(c1.real + c2.real, c1.imaginary + c2.imaginary);

// Override ToString() to display a complex number 
// in the traditional format:
public override string ToString() => $"{this.real} + {this.imaginary}";

在某些情况下，这是定义简单方法的一种非常有用的方法，但是我不记得曾经在任何地方看到它的描述.我尝试在C#5.0语言规范中搜索此方法声明语法的描述，但找不到任何内容.我在网络搜索中也没有找到任何内容.

This is a really useful way of defining simple methods in certain circumstances, but I don't recall ever seeing it described anywhere. I tried searching the C# 5.0 language specification for a description of this method declaration syntax, but could find nothing. I also found nothing in my web searches.

两个问题:

1. 此方法声明语法在哪个C#版本中可用?
2. 在语言规范的何处描述了这种语法?

推荐答案

它是C#6中添加的，您可以在新编译器的官方Github上阅读它

It was added in C# 6, you can read about it on the official Github of the new compiler here.

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