0-Basics.md

Rust Fundamentals

Explore: Home Testing

Toolbox —

• Rust Prelude
  • std::fmt – [[fill]align][sign]['#']['0'][width]['.' precision]type
    • format!() ∙∙∙∙∙∙∙ print!() ∙∙∙∙∙∙∙ eprint!() ∙∙∙∙∙∙∙ write!()
    • {} fmt::Display ∙∙∙∙∙∙∙ {:?} {:#?} fmt::Debug
    • {:b} binary ∙∙∙∙∙∙∙ {:o} octal ∙∙∙∙∙∙∙ {:x} hex
    • fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {...}
  • Result<Ok(T), Err(_)>.expect()
  • Option<>

Cargo Cheatsheet —

• cargo new <project_name> --lib
• cargo doc --open
• cargo [check | run | build --release]
• cargo update

Cargo.toml —

[workspace]
resolver = "3"
members = ["projects/*"]
# ...............................
[dependencies]      # Uses SemVer; 0.4.2 shorthand for ^0.4.2, i.e. [0.4.2, 0.5.0)
utils = { path = "../utils" }
# ...............................
[lints.rust]
# dead_code = "allow"
# unused_variables = "allow"
# unused_imports = "allow"

• Cargo Manifest | The Cargo Book
• Cargo Workspaces | The Rust Book
• Package Registry | Crates.io

Env Setup —

• Windows Def. Install Path: C:\Users\<user> → ~\.rustup & ~\.cargo
• Install | Rust-lang.org
• Downloads | VS Code
• In VSCode workspace, add .vscode/settings.json and list Cargo.toml's (for rust-analyzer extension)

  • {
        "rust-analyzer.linkedProjects": [
            ".\\hello-rust\\Cargo.toml",
            ".\\ratatui\\counter-app\\Cargo.toml",
            ".\\ratatui\\json-editor\\Cargo.toml"
        ]
    }