Dynamically Sized Heterogenous Collections

Overview

We started this chapter by noting that the dynamically sized containers offered by C++ are homogenous, meaning that we can only store elements of one type. But sometimes, we need to keep track of a collection that’s dynamic in size that contains elements of different types. To be able to do that, we will use containers containing elements of type std::any or std::variant.

The simplest solution is to use std::any as the base type. The std::any object can store any value in it: