gsl库中的span和array_view有什么区别？ [英] What's the difference between span and array_view in the gsl library?

问题描述

在最近的几次会议演讲中，我听说过Bjarne Stroustrup和其他人提到了C ++和支持他们的一些类型的新编码指南。

In several recent conference presentation I've heard Bjarne Stroustrup and others mention new coding guidelines for C++ and some types supporting them.

具体来说，我还记得 作为函数的参数（在时间约32：00时），作为参数的 而不是（T * p，int n） array_view< T> 的建议。他们是两个选择，但同样的概念？还是我混淆的事情，他们实际上不是这么相关？

Specifically, I remember the example of span<T> instead of (T* p, int n) as a parameter to a function (at time about 32:00 into the talk); but I also remember the suggestion to use array_view<T>. Are they two alternatives but the same concept? Or am I confusing things and they're actually not so related?

我似乎找不到任何他们应该是什么的权威定义。

I can't seem to find any authoritative definition of what they're both supposed to be about.

推荐答案

我们与图书馆工作组中的人员在标准委员会。他们希望 array_view 他们试图进入只读的标准。对于核心指南，我们需要一个读写的抽象。为了避免（潜在）标准和指南支持库（GSL）之间的冲突，我们将我们的（读和写） array_view 重命名为 / code>： https://github.com/microsoft/gsl 。

We talked with people in the library working group in the standards committee. They wanted the array_view they are trying to get into the standard to be read only. For the core guidelines, we needed an abstraction that was read and write. To avoid a clash between the (potential) standards and the guidelines support library (GSL), we renamed our (read and write) array_view to span: https://github.com/microsoft/gsl .

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