推动::可选的替代在C ++标准库 [英] boost::optional alternative in C++ Standard Library

问题描述

我试图让我的程序而不升压使用工作，但无法找到一些有用的模式替代。也就是说，我无法找到的boost ::可选的标准库-likewise格局。是否有升压一些标准的替代::可选（C ++ 11或其他地方）？

I'm trying to get my program working without boost usage, but can't find an alternative of some useful patterns. Namely, I can't find boost::optional-likewise pattern in the standard library. Is there some standard alternative for boost::optional (C++11 or somewhere else)?

推荐答案

简短的回答：没有。

龙答：根据升压规范自己动手。该文档是非常详尽和code不是那么复杂，但是这仍然需要高于平均水平的C ++技能。

Long answer: Roll your own according to the boost spec. The documentation is quite exhaustive and the code isn't that complex, but this still requires above average C++ skills.

要更新这个答案：C ++ 14遗憾的是没有用出货的std ::可选的。目前的建议（修订版5） N3793 ，预计发运作为一个单独的技术规范或成为C ++ 17的部分。

To update this answer: C++14 unfortunately did not ship with std::optional. The current proposal (Revision 5) is N3793 and it is expected to be shipped as a separate technical specification or to become part of C++17.

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