Handling different types gracefully

[bearophile]

Roderick Gibson:

> auto entities = new Entities();
> auto entity_id = entities.createEntity();
> entities.addComponent!(position)(entity_id, pos);
> entities.addComponent!(movement)(entity_id, mov);
> entities.addComponent!(collision)(entity_id, col);
> auto physics_data = 
> entities.getEntitiesWithComponents!(position, movement, 
> collision)();
>
> The two big requirements are some kind of regular, queryable 
> structure to hold the components (of different types), and the 
> ability to filter by type. Is anything like that remotely 
> possible?

If the possible types are know, then there's 
std.variant.Algebraic, otherwise there is a free Variant or 
VariantN. They are not perfect, but maybe they are good enough 
for you.

Bye,
bearophile