fierzone Swift Language Standards
Priority: P0
Implementation Guidelines
Optionals & Safety
- Never Force Unwrap: Use
guard let,if let, or nil coalescing (??). - Nil Comparison: Use
value != nilinstead ofif let _ = value. - Implicitly Unwrapped: Avoid
Type!. Use properType?.
Protocols & Extensions
- Protocol Composition: Prefer
struct+ protocols over class inheritance. - Extensions: Use for conformance (
extension MyType: Codable), not storage. - Protocol Witnesses: Explicitly implement all required members.
Type Safety
- Avoid
Any: Use generics or associated types instead. - Enums: Prefer enums with associated values over multiple Optionals.
- Value Types: Default to
structunless reference semantics needed.
Anti-Patterns
- Force Unwrapping:
**No ! operator**: Use safe unwrapping. - Sentinel Values:
**No -1 for failure**: Use Optional. - as! Casting:
**No Force Cast**: Use conditional cast (as?).
References
- Optionals & Protocols