Chapter 2: Advanced Notes
This chapter covers more complex note content.
Notes with code blocks
The Iterator trait
1
#![allow(unused)]
fn main() {
pub trait Iterator {
type Item;
fn next(&mut self) -> Option<Self::Item>;
}
}The heart of Rust's iterator system — just one required method.
powers Rust’s functional programming patterns.
Notes with lists
Error handling in Rust
2
Common patterns:
- Recoverable:
Result<T, E>with?operator - Unrecoverable:
panic!macro - Optional values:
Option<T>with?operator (in functions returningOption)
Choose the right tool for the situation.
is versatile and explicit.
Notes with blockquotes
The module system
3
Modules let you organize code within a crate into groups for readability and reuse. They also control the privacy of items: public, private, or
pub(crate).
See The Book.
helps organize large codebases.
Notes with inline code and links
Clippy4Run cargo clippy to get lint suggestions. Configure with
#[allow(clippy::some_lint)] attributes. See the
Clippy Lints page. catches common
mistakes.
Notes with tables
Rust edition differences
5
| Edition | Year | Key Feature |
|---|---|---|
| 2015 | 2015 | Original |
| 2018 | 2018 | NLL, dyn Trait |
| 2021 | 2021 | Closure captures |
| 2024 | 2024 | gen blocks |
can trip up newcomers.