Webinar: Live without Exception in Rust
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The document presents a talk on handling exceptions in Rust, a systems programming language known for its focus on safety, speed, and concurrency. It highlights that Rust does not use traditional exception handling methods like throwing or catching exceptions, and instead employs enums like Result and Option for error and state management. The presentation also covers specific scenarios for using panic and provides examples of error handling in Rust code.
Webinar: Live without Exception in Rust
- 1. Live Without Exceptions In Rust Presented By: Ayush Kumar Mishra Sr. Lead Consultant Knoldus Inc. LEARN NOW
- 2. About Knoldus Knoldus is a technology consulting firm with focus on modernizing the digital systems at the pace your business demands. DevOps Functional. Reactive. Cloud Native
- 3. 01 Introduction to Rust 02 Dealing with Exception handling in Other Languages 03 Live without Exception in Rust 04 Error Handling in Rust Our Agenda
- 4. 1 2 3 4 Best known for being a system language Doesn't have Garbage Collection It has its own package manager Cargo Focused on safety, speed, and concurrency “A systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety. ” Introduction to Rust
- 5. Strict exception handling Java01 Exceptions-agnostic C 03 Weak exception handling C++, Python, Ruby 02 By monadic types Rust, Scala, Swift04 Dealing with Exception handling in Other Languages
- 6. Live without Exception in Rust
- 7. Live without Exception in Rust 1 Rust doesn’t support throwing exceptions, nor does it support catching them
- 8. Live without Exception in Rust 2 Exceptions bubble up by default, which may be surprising / unexpected
- 9. Live without Exception in Rust 3 Rust does not use the concept of null nil undefined types enum Result<T, E> { Ok(T), Err(E), } enum Option<T> { None, Some(T), }
- 10. Live without Exception in Rust 4 In Rust, there is no way for code to interact with objects in an invalid state
- 11. BANNER INFOGRAPHICInsert Your Subtitle Here Unrecoverable01 Recoverable 02 fn main() { panic!("Quit from here!"); } fn parse_string_to_int(str: &str) { match str.parse::<i32>() { Ok(t) => println!("Here is parsed integer {}!", t), Err(e) => println!("There was a problem {:?}", e), }; } Error Handling in Rust
- 12. BANNER INFOGRAPHICInsert Your Subtitle Here When to use panic! When the panic! macro executes 1) When there is some unexpected error 2) When we are not using any debugger or proper logs 1) Unwinding 2) Aborting (panic = 'abort') panic!
- 13. Option<T> or Result<T, E> fn match_color(color: Option<&str>) { match color { Some("Red") => println!("Hey I got Red T-shirt"), Some(c) => println!("I don't like {} T-shirt", c), None => println!("No T-shirt"), } } fn parse_string_to_int(str: &str) { match str.parse::<i32>() { Ok(t) => println!("Here is parsed integer {}!", t), Err(e) => println!("There is a problem {:?}", e), }; }
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