Adding/Removing components while iterating

[BuBuMan]

Hey @skypjack! Your posts at https://skypjack.github.io/ have been very educational. I am learning and having a blast reading through them. I am not sure if this is the right place to ask a question about the posts, but I noticed that entt supports adding/removing components dynamically at runtime which is a very nice feature. On one of your posts, it is mentioned one way to achieve this is to iterate backwards instead of forward, but I have been wondering how you were able to achieve this in the following case:

• Assuming pools are using dynamically growing arrays, how do you avoid the cases where a reallocation happens due to an addition?

Thank you for your time

[BuBuMan]

I think I got my answer by reading more. Seems like pools are stored in pages instead :)

[skypjack]

Yup, that's because of the pagination. If you enable pointer stability, you can also remove elements without invalidating pointers. Otherwise, the swap-and-pop approach can cause troubles in this case.