模板类包含对其自身实例的引用的stdvector [英] template class containing a stdvector of references to its own instances

问题描述

我是C ++的新手，我第一次尝试构建一个复杂的模板结构。

I'm relatively new to C++, and am trying for the first time to build a complex template structure.

我如何声明，作为模板的成员Foo类，Foo *元素的std :: vector，但是可以是各种类型？

How can I declare, as member of a template class Foo, a std::vector of Foo* elements, but that could be of various types?

#include <vector>

template <typename T>
class Foo {
    T mValue;
    std::vector< Foo<T>* > mFooParameters;  // <---- I would like this vector to contain
                                            //       any sort of Foo<T>* elements,
                                            //       Foo<int>*, Foo<double>*, etc.
};

简单，可能但复杂或不可能？

Is it straightforward, possible but complicated, or impossible?

感谢您的回答！

推荐答案

如果您的向量类型都是相关的，请使用@jogojapan提供的链接中解释的多态性相关的，使用 void * 的向量来保存指向您的数据的指针（虽然有点杂乱）

If your vector types are all related, use polymorphism as explained in the link provided by @jogojapan, if the types are not related at all, use a vector of void* to hold pointers to your data (kind of messy though)

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