Personal notes on the Rust programming language
https://doc.rust-lang.org/stable/rust-by-example/index.html
Install
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
Update
rustup update
Cargo
cargo build
cargo run
cargo test
cargo doc
cargo publish
Hello World
cargo new hello-rust
cd hello-rust
cargo run
Dependencies are added to Cargo.toml. Next time you do a cargo build, they are downloaded.
Comments are modern C-style with doc-string support.
// line comment
/* block comment */
/// doc-string following
//! doc-string enclosing
//* also? */
Need more info and examples for doc-strings
Formatting and printing are handled by several macros.
format!print!println!eprint!eprintln!
Syntax is very similar to python's string.format().
The usual variable types for ints and floats exist and have descriptive names.
- int: i8, i16, i32, i64, i128, isize, u8, u16, u32, u64, u128, usize
- float: f32, f64
- char: 4-byte unicode
- bool: true, false
- tuples
- arrays
- strings?
- dictionaries?
By default, variables are not mutable
let i = 1; // immutable int32
let mut f = 3.14; // mutable f64
Variable types can be stated in prefix, suffix, inferred, or default
let i = 1; // default
let i32 i = 1;
A tuple mixes types
let tup = (i, f, true);
println!("stuff: {:?}", tup);
Single tuples require a trailing comma
let nt = (iu32); // not a tuple
let yt = (iu32,); // is a tuple because of the trailing comma
Tuples can be unpacked or indexed
let (a, b, c) = tup;
println!("{} {}", a, tup.0);
An array is a collection of objects of the same type of FIXED length. A