Rust Notes

Notes from learning the Rust language. Using the Brown University experimental fork of “The Rust Programming Language” book.

Rust Basics

Some of the basic bits of information.

rustc command builds rust executables.
The rustup command can be used to update rust on your system..

Cargo

Cargo is a build system and package manager for Rust. It also does a number of project management tasks like creating git repos, config files and setting up directory structures for a project automatically.

Cargo Commands

cargo new project_name creates a new project with cargo.
cargo build builds a project, an executable will be placed in the target/debug directory.
cargo run builds a project and executes it.
cargo check checks the code without building.
To build a project with optimisations, the --release flag can be added. This will place the executable in target/release.

Syntax and writing Rust

Rust syntax has some similarities to other programming languages like C.

Rust Basics

Some of the basic bits of information.

Functions in rust are denoted by fn, the contents must be contained by {} brackets..
The main function is the first one ran in a rust program.

Using Libraries

Only a subset of Rust’s standard library is available automatically in a project, this set is known as the prelude. The following is information on how to use other part of the standard library, or other libraries.

The use statement allows you to bring specific types from the standard library into a project. This is done by calling it’s specific library after the parent library like std::io.
The main function is the first one ran in a rust program.

use std::io;
#use library_name::sub_library;