读和写类的向量 [英] Reading and writing a vector of classes

问题描述

我有一个三级/四级的继承层次结构。并且在每个级别内将至少保存一个或多个具有不同属性的类，使类的对象唯一（当然，从上面的级继承属性）。

一个类的每个对象可能有不同的属性，因此我的问题是，如何读取和写入每个对象到一个文件，并区分属性？

解决方案

这个问题可怕地低估了，我只是建议使用图书馆。

我个人非常喜欢Boost序列化

• 功能集（对象跟踪，智能指针，别名检测，循环图，多态类型和集合）


• 非侵入性（您可以向3rdparty类型）


• 可移植性（需要注意的是，您不应期望标准二进制文件可以跨机器/版本移植：use EOS便携式存档

查看示例（其具有多态集合）：http://www.boost.org/doc/libs/1_55_0/libs/serialization/doc /tutorial.html#examples

海中有更多的鱼：protobuf据说是非常棒的。

您/可以/使用Spirit Qi / Karma制作您自己的曲目，虽然我不建议这样做，除非您需要人工可读的格式

I have an inheritance hierarchy with three/four levels. And within each level will hold at least one or more classes with different attributes that make that object of a class unique (and of course, inheriting attributes from the level above).

Each object of a class may have different attributes to another therefore my question is, how can I read and write each object to a file and differentiate the attributes?

I do apologise if I have not worded this very well but will be very appreciative if you can help.

解决方案

The problem being horribly underspecified, I'm just going to suggest using a library.

I'm personally quite fond of Boost Serialization for

• feature set (object tracking, smart pointers, alias detection, cyclic graphs, polymorphic types and collections)
• non-intrusiveness (you can add serializability to 3rdparty types)
• portability (with the caveat that you should not expect the standard binary archive to be portable across machines/version: use EOS Portable Archives for that

See the sample (which has polymorphic collections): http://www.boost.org/doc/libs/1_55_0/libs/serialization/doc/tutorial.html#examples

There are more fish in the sea: protobuf is supposedly quite awesome.

You /can/ roll your own using Spirit Qi/Karma, though I'd not suggest this unless you want human readable formats

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