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code_learner78
·
When to use associated types vs generic type parameters in Rust?
Hi! I recently started learning Rust and I'm struggling with one concept. I understand that there are traits with associated types and traits with generic type parameters. Here are examples:
```rust
// Associated type
trait Container {
type Item;
fn get(&self) -> Self::Item;
}
// Generic type
trait Container {
fn get(&self) -> T;
}
```
At first glance they do almost the same thing. But I've read that choosing between them is an important architectural decision. When I write some trait, I don't understand what to choose. For example, I tried to make a trait for converting one type to another — I used a generic parameter. Then for a "collection" trait — I used an associated type. But why? It seems to me that if I use a
