foreach 纯粹是“语法糖"吗? [英] Is foreach purely “syntactic sugar”?

问题描述

当 foreach 与数组一起使用时，编译器会将 foreach 循环编译为类似于 for 循环的内容.当 foreach 与 IEnumerable 或IEnumerable.那么这是否意味着 foreach 纯粹是 语法糖?或者有什么复杂的吗?

The compiler compiles a foreach loop into something like a for loop when the foreach is used with an array. And the compiler compiles a foreach loop into something like a while loop when the foreach is used with an IEnumerable or IEnumerable<T>. So does this mean foreach is purely syntactic sugar? Or is there anything sophisticated about it?

CLR 知道 foreach 吗?MSIL 代码中是否有专门为 foreach 设计的内容?

Does the CLR know about foreach? Is there anything specifically designed for foreach in the MSIL code?

推荐答案

这纯粹是语法糖，因为没有它您可以获得相同的行为，是的.许多其他事情是相同的... for, while 等等... 错误引用阿基米德:给我 if 和 goto，我会移动代码..."

It's purely syntactic sugar in that you could obtain the same behaviour without it, yes. Many other things are the same... for, while etc... To misquote Archimedes: "Give me if and goto, and I will move the code..."

不，CLR 没有任何 foreach 的概念.

No, the CLR doesn't have any concept of foreach.

这篇关于foreach 纯粹是“语法糖"吗?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！