否<可选>在MS Visual Studio 2013中-怎么办? [英] No <optional> in MS Visual Studio 2013 - what to do?

问题描述

我想使用std::experimental::optional，但是MSVS 2013告诉我找不到标头.

I want to use std::experimental::optional, but MSVS 2013 tells me it can't find the header.

• 为什么不在那里?
• 我可以根据其他地方的代码推出自己的产品吗?可能是C ++ 14提案?

推荐答案

std::experimental::optional 源自 Boost.Optional 库，并且此实现在Visual C ++ 12.0中效果很好(尽管与 N3793 提案文件，可以在此处找到.

std::experimental::optional originates from the Boost.Optional library, and this implementation works well in Visual C++ 12.0 (though it differs a little). Reference single-header implementation, based on the N3793 proposal paper, can be found here.

Visual Studio附带的受支持的C ++ 11/14/1z核心和库功能的最新列表可从 Visual C ++ Team Blog ，来自这里.

The latest list of supported C++11/14/1z core and library features that are shipped with Visual Studio can be found from the Visual C++ Team blog, from this post in particular. A set of header files of the Standard Library implementation (and some extensions) from Microsoft can be viewed here.

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