• [ ] 모나드
• [ ] Multiple variadic parameters (SE-0284)
• [ ] Implicit member chain (SE-0287)
• [ ] Result Builders (SE-0289)
• [ ] Property wrappers on parameters (SE-0293)
• [ ] Codable synthesis for associated value enums (SE-0295)
• [ ] Static member lookup in generic contexts (SE-0299)
• [ ] Interchangeable use of CGFloat and Double (SE-0308)
• [ ] #if for postfix member expressions (SE-0308)