RRust By Example

Error Handling

Result, Option, ? operator, and custom errors.

7 examples

Basics Ownership Compound Types Flow Control Functions Generics Traits Error Handling Collections Concurrency Async Smart Pointers Iterators Patterns Modules Macros Unsafe Lifetimes Testing File I/O Serialization CLI

beginner2 examples

Option Basic

Handle optional values with Option<T>.

Unwrap and Expect

Quick error handling with unwrap and expect.

intermediate4 examples

Map and Transform Errors

Transform error types with map_err and and_then.

Question Mark Operator

Use ? to propagate errors concisely.

Result Basic

Handle errors with Result<T, E> type.

Result Combinators

Chain operations on Result with map, and_then, or_else.

advanced1 examples

Custom Error Type

Define custom error types with thiserror or manually.