Robust Error Handling with `Result`
Implement idiomatic error handling using the `Result` enum, `?` operator, and custom error types for resilient applications.
Handling Errors in Rust
Errors are a part of programming. In Rust, we distinguish between two main types: recoverable and unrecoverable errors.
- Unrecoverable errors usually signal bugs, causing the program to stop with
panic!. - Recoverable errors mean something went wrong but can be handled, like a file not found.
Rust helps you deal with recoverable errors gracefully.
`panic!` vs `Result`
When an unrecoverable error occurs, Rust calls the panic! macro. This unwinds the stack and exits your program, usually printing an error message.
For recoverable errors, Rust uses the Result enum. This enum tells you if an operation succeeded (Ok) or failed (Err), letting your program decide what to do next.
All lessons in this course
- Organizing Code with Modules
- Managing Dependencies with Crates
- Robust Error Handling with `Result`