Structs
Rust Result
Using Result
Rust Result handles errors with Ok and Err variants.
Introduction to Rust Result
Rust provides a powerful feature for error handling through the Result type. The Result enum is designed to encode error handling information to be returned from functions. It has two variants: Ok(T), which signifies success and contains a value, and Err(E), which signifies an error and contains an error value.
Defining a Function with Result
When writing functions in Rust, you can use the Result type to handle potential errors that may occur during execution. This is a common practice to ensure that errors are handled gracefully without panicking.
Using Result in Code
Once you have a function that returns a Result, you can handle the Ok and Err variants using pattern matching. This allows you to define different paths of execution based on whether the function succeeded or failed.
Chaining Results with Combinators
Rust's Result type provides several combinators such as map, and_then, and or_else to work with results more fluently. These methods allow chaining operations on the Ok or Err values without having to unwrap them immediately.
Conclusion
The Result type in Rust is a powerful tool for error handling that encourages robust and error-resistant code. By using Result, developers can ensure that their programs handle errors in a controlled and predictable manner, leading to more reliable software.
Structs
- Structs
- Struct Methods
- Enums
- Option
- Result
