C ++如何创建异构容器 [英] C++ How to create a heterogeneous container

问题描述

我需要以（name，value）的形式存储一系列数据点，其中值可以采用不同的类型。

I need to store a series of data-points in the form of (name, value), where the value could take different types.

我想为每个数据点使用类模板。然后对于我看到的每个数据点，我想创建一个新对象，并将其推回到一个向量。对于每个新类型，我需要先从模板创建一个新类。但是我不能存储在任何向量中创建的对象，因为向量对所有条目都需要相同的类型。我需要存储的类型不能在继承层次结构中。他们是无关的。也可以在将来创建更多类型，我不想更改每个新类型的存储服务。有没有办法创建一个异构容器来存储这些条目？
谢谢！

I am trying to use a class template for each data-point. Then for each data-point I see, I want to create a new object and push it back into a vector. For each new type, I need to create a new class from the template first. But I can not store the objects created in any vector, since vectors expect the same type for all entries. The types I need to store can not be fitted in a inheritance hierarchy. They are unrelated. Also there can be more types created in future, and I do not want to change the storage service for each new type. Is there a way to create a heterogeneous container to store these entries? Thank you!

推荐答案

boost库可能是你想要的（boost :: any）。如果你不能使用boost ...，你可以使用包装指针方法自己滚动。

The boost library has probably what you're looking for (boost::any). You can roll your own using a wrapped pointer approach if you cannot use boost...

这篇关于C ++如何创建异构容器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！