swift-language

Swift switch expressions enable value-returning conditionals that simplify code paths. You can map status enums to strings inline without intermediate variables, producing cleaner and more expressive control flow.

Swift Codable patterns streamline data encoding and decoding by automatically mapping JSON to native types. You implement Encodable and Decodable to let the compiler synthesize serialization logic for robust data handling.

Typed throws improve Swift error handling by specifying the exact error type a function can throw. This enables compile-time safety and allows callers to handle specific errors without guessing at runtime types.

Use Swift opaque types to hide concrete types while preserving identity, and existential types when you need dynamic dispatch over heterogeneous values. Opaque types offer better performance, while existentials provide runtime flexibility.

Swift Regex builders allow you to construct complex string matching patterns using a type-safe DSL. You can compose regex patterns programmatically to validate and extract text without raw string literals.

This skill does not cover SwiftUI or async concurrency. It focuses exclusively on non-concurrency Swift language patterns including generics, protocols, property wrappers, and Codable for core logic implementation.