switch case let ... as

Swift ⟩ Pattern Matching ⟩ Sentence Patterns ⟩

💈範例

👉 比較： if let ... as?

// switch on "protocol type"
switch medium {
  case let b as Book : // ... ⭐️ 注意：這裡用的是 `as` 不是 `as?`
  case let m as Movie: // ...
  default: // ...
}

📗 參考

👥 相關