C++ High Performance

Heterogenous container of variants

Now that we have a variant which can store any type of a provided list, we can expand upon this to a heterogeneous container. We do this by simply creating a std::vector of our variant.

using VariantType = std::variant<int, std::string, bool>; 
auto container = std::vector<VariantType>{}; 

We can now push elements of different types to our vector:

container.push_back(false); 
container.push_back(std::string{"I am a string"}); 
container.push_back(std::string{"I am also a string"}); 
container.push_back(13);

The vector will now look like this in memory, where every element in the vector has the size of the variant, in this case sizeof(std::string):

Vector of variants

Of course, we can also pop_back(), or modify ...