继承std :: ostream [英] inherit std::ostream

问题描述

我想定义从std :: ostream公开继承的MyOStream。假设我想实现自己的ofstream。

I want to define MyOStream which inherits publicly from std::ostream. Let's say I want to implement my own ofstream.

如何做到这一点？
我会很高兴任何帮助，编码示例或任何相关链接......

How can this be done? I'll be glad for any help, coded example or any relevant link...

谢谢！

推荐答案

我不明白你在这里想要完成什么。用户代码不应从流本身继承，因为流旨在提供通用的特定于语言环境的转换/字符串化工具。如果您尝试使用可以写入新缓冲区位置（即gzip流）的 ostream ，那么通常应该从 basic_streambuf继承相反，它允许您使用现有的iostream转换工具，但允许您重定向其输入/输出。

I don't understand exactly what you're trying to accomplish here. User code shouldn't inherit from the streams themselves, as the streams are intended to provide a generalized locale specific conversion/"stringizing" facility. If you're trying to use an ostream which can write to a new buffer location (i.e. a gzip stream), then one should generally inherit from basic_streambuf instead, which allows you to use the existing iostream conversion facilities but will allow you to redirect their input/output.

如果您想学习关于iostream本身如何运作的细节，我听过的关于这个主题的最好的书是标准C ++由Angelika Langer和Klaus Kreft创作的IOStreams和Locales 。我不能自己担保这本书，因为我还没有得到我的副本（ 在我的列表旁边），但你可以在StackOverflow上找到一些建议。

If you want to learn the ins and outs of how iostream itself operates, the best book I've heard about the subject is Standard C++ IOStreams and Locales by Angelika Langer and Klaus Kreft. I can't myself vouch for the book because I have yet to get my copy (it is next on my list), but you can find several recommendations for it here on StackOverflow.

您可能还想看一眼 boost :: iostreams ，为希望自定义iostream系统行为的人提供一些帮助。

You also probably want to take a peek at boost::iostreams, which provides some helpers for anyone wishing to customize the behavior of the iostream system.

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