Rust Error Handling

Yes, this error handling pattern applies to both library crates and CLI applications. Libraries use thiserror for derive-based error enums, while CLI applications use anyhow for contextual error handling, ensuring consistent error flows across entire Rust projects.

Structured Rust error handling uses thiserror to define library error types and anyhow to add application context. You refactor functions to return Result with proper context, replacing unwrap calls with the ? operator for safe propagation.

The best way to propagate failures in Rust is returning Result from functions and using the ? operator to bubble errors up. This pattern avoids panics in production code by explicitly handling failure paths instead of calling unwrap.

Use thiserror when defining structured error types for library crates where callers need to match specific errors. Use anyhow in CLI applications to add contextual messages without exhaustive error type definitions.

Yes, this error handling pattern applies to both library crates and CLI applications. Libraries use thiserror for derive-based error enums, while CLI applications use anyhow for contextual error handling across Rust projects.

Avoiding unwrap in Rust production code prevents runtime panics that crash applications. Replacing unwrap with Result propagation and the ? operator ensures failures are handled explicitly, maintaining robust and ergonomic error flows.