Rust Error Handling - Best Practices

Here are some best practices for error handling in Rust programming that I've found effective: - For tests and examples, use "box dyn error" instead of "anyhow." - Prefer the "?" pattern over "unwrap" or "expect," even in tests and examples, to align with production coding standards. - "Box dyn error" is excellent for error passthrough, as are `map_err` and `ok_or` with static strings and formatted strings. - In production code, use an enum with fully descriptive variant names and favor struct variants with clear names over tuple variants. - Avoid relying on the display to convey the meaning of error variants. - In web or device applications, human error rendering might not occur at the enum/type level, so using Debug for display may suffice. - For web or device applications, using Serialize for errors that need to be logged or sent to the client for display can be a powerful and straightforward pattern. - Prioritize clarity in error naming (variants) and focus on consistency as the code develops. - Don't be afraid of medium-length enum variant names; remember, type refactoring is straightforward. - In summary, start with progressive and clear practices, and become more structured as the code matures. == Jeremy Chone: - Patreon - https://patreon.com/jeremychone - Any help is a big help (for Rust educational content) - Twitter - https://twitter.com/jeremychone - Discord general-rust - https://discord.gg/W2besKCzjx - Discord rust10x - https://discord.gg/XuKWrNGKpC - Rust10x - https://rust10x.com - Rust resources for production coding. Big thanks to CrabNebula (https://crabnebula.dev/) for sponsoring this channel. == Rust10x AI / OpenAI / Ollama - Rust OpenAI API Tutorial: https://www.youtube.com/watch?v=PHbCmIckV20&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - Rust Ollama Tutorial: https://youtu.be/OcH-zT5VNgM == Rust10x Web App production coding: Episode 01: https://www.youtube.com/watch?v=3cA_mk4vdWY&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q Episode 02: https://www.youtube.com/watch?v=-dMH9UiwKqg&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q Episode 03: https://www.youtube.com/watch?v=zUxF0kvydJs&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q Episode 04: https://www.youtube.com/watch?v=3E0zK5h9zEs&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q Episode 05.1: https://www.youtube.com/watch?v=Gc5Nj5LJe1U&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q Web Site: https://rust10x.com/web-app GitHub: https://github.com/rust10x/rust-web-app Discord rust10x - https://discord.gg/XuKWrNGKpC Patreon - https://patreon.com/jeremychone - Any help is a big help (for Rust Production Coding educational content) == Other Other popular Rust Programming videos: - Rust Web App Production Coding Blueprint - https://www.youtube.com/watch?v=3cA_mk4vdWY&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - Rust Axum - Full Course - https://www.youtube.com/watch?v=XZtlD_m59sM&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - Rust Type State Builder Pattern - https://www.youtube.com/watch?v=pwmIQzLuYl0&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - Quick Start Code Layout - https://www.youtube.com/watch?v=oxx7MmN4Ib0&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - AWESOME-APP Full Overview - Rust template for building Awesome Desktop Application: https://www.youtube.com/watch?v=BY_ZjPGqJJk&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - Tauri Quick Introduction (Desktop App wit Rust Programming): https://www.youtube.com/watch?v=kRoGYgAuZQE&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - Rust Web App tutorials series: https://www.youtube.com/watch?v=VIig9IcQ-w8&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q&list=PL7r-PXl6ZPcCLvwpdD2Vj1O4CyoFTiHKd - Rust Bevy Full Tutorial - Game Development with Rust: https://www.youtube.com/watch?v=j7qHwb7geIM&list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - Rust for Java Developers series: https://www.youtube.com/watch?v=iFdh4sPC5Tg&list=PL7r-PXl6ZPcD63DS2djSiz4SlXkaTfobc&index=2&t=654s Playlists: - Rust AI Programming Series: https://www.youtube.com/playlist?list=PL7r-PXl6ZPcBcLsBdBABOFUuLziNyigqj - Rust Web App Production Coding Series: https://www.youtube.com/playlist?list=PL7r-PXl6ZPcCTTxjmsb9bFZB9i01fAtI7 - Rust For Desktop App: https://youtube.com/playlist?list=PL7r-PXl6ZPcAQAi1lfVrtHCSbaJbwZ4O8 - Everything Rust Programming - Tutorials, Courses, Tips, Examples: https://youtube.com/playlist?list=PL7r-PXl6ZPcCIOFaL7nVHXZvBmHNhrh_Q - Rust Programming for Web Development: https://youtube.com/playlist?list=PL7r-PXl6ZPcCLvwpdD2Vj1O4CyoFTiHKd - Rust Courses: https://youtube.com/playlist?list=PL7r-PXl6ZPcB4jn1_VR3D8tSK9DxOaiQE - Rust for Java Developers: https://youtube.com/playlist?list=PL7r-PXl6ZPcD63DS2djSiz4SlXkaTfobc Rust10x - Coding Resources for Production Coding in Rust. ➜ https://rust10x.com Other notes: - ScreenBrush for the green lines. (Gromit seems to be the equivalent on Linux) - Sketchapp for some graphics. - Davinci Resolve and Fusion video editing. - VSCode with Google Material icon themes (with some customization)