Systems go recommended
Go Error Handling
Go error handling patterns covering error wrapping, sentinel errors, custom error types, errors.Is/As, and idiomatic error propagation.
- Difficulty
- intermediate
- Read time
- 1 min read
- Version
- v1.0.0
- Confidence
- established
- Last updated
Quick Reference
Go Errors: Explicit returns (no exceptions). Wrap with fmt.Errorf(\"%w\", err) for context. Sentinel errors for 3-5 per domain max. Use errors.Is() for sentinel checks, errors.As() for type checks. Don't log at every layer - log once at boundary. Accept interfaces, return structs applies to errors too.
Use When
- Go application development
- Error propagation patterns
- API error handling
- Service error design
Skip When
- Non-Go projects
- Simple scripts
Go Error Handling
Go error handling patterns covering error wrapping, sentinel errors, custom error types, errors.Is/As, and idiomatic error propagation.