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，其中的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.

我正在尝试为每个数据点使用一个类模板.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向量中.对于每种新类型，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，因为向量期望所有条目的类型相同.我需要存储的类型不能适合继承层次结构.他们是无关的.将来还会创建更多类型，我不想为每种新类型更改存储服务.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 库可能有你正在寻找的东西(boost::any).如果您不能使用 boost，您可以使用包装指针方法自行滚动...

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...

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