Rust Error Handling Alternatives

Traditional Rust error handling uses large enums per module or crate, causing functions to return errors they cannot produce.

A struct-based approach represents each error independently and combines them into error sets to improve type safety.

The terrors crate follows the struct-based paradigm but requires manual mapping of errors between functions.

The error_set crate uses macros to define concise error enums, automatically generate conversions, and support union of error sets.

Other libraries like SmartErr explore similar error-set paradigms, and attribute macros can auto-generate error enums based on function bodies.