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ConfigsApr 12, 2026·3 min de lectura

Swift — Apple Modern Programming Language

Swift is a powerful and intuitive programming language for building apps for iOS, macOS, watchOS, tvOS, Linux, and the server. Created at Apple to replace Objective-C. Fast, safe, and expressive with protocol-oriented design.

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Introducción

Swift is a powerful and intuitive programming language developed by Apple, first announced at WWDC 2014. Designed to replace Objective-C while remaining interoperable with it. Swift is fast (compiled to native code via LLVM), safe (eliminates entire classes of bugs with optionals, value types, and memory-safety features), and expressive (modern syntax, closures, generics, protocol-oriented programming).

What Swift Does

  • Native compilation — LLVM-based, native ARM/x86/WASM
  • Optionals — no nil pointer crashes
  • Value types — structs, enums with associated values
  • Protocols — structural polymorphism, protocol extensions
  • Generics — parameterized types and functions
  • Closures — first-class, trailing syntax
  • Concurrency — async/await + actors (Swift 5.5+)
  • SwiftUI — declarative UI framework
  • Swift Package Manager — built-in dep/build tool
  • Interop — Objective-C, C, and C++ interop
  • Cross-platform — macOS, iOS, watchOS, tvOS, Linux, Windows

Architecture

Swift compiler built on LLVM. Uses Automatic Reference Counting (ARC) for memory management — no GC pauses. Modules and package format replace Objective-C frameworks. SwiftUI uses result builders and property wrappers for declarative UI.

Self-Hosting

Language toolchain.

Key Features

  • Protocol-oriented programming
  • Value types and copy-on-write
  • Async/await and actors
  • Swift Concurrency (structured concurrency)
  • Result builders for DSLs
  • Property wrappers
  • Swift Package Manager
  • Server-side frameworks (Vapor, Hummingbird)
  • Interop with Objective-C and C++
  • Linux and Windows support

Comparison

Language Memory Concurrency Interop
Swift ARC async + actors ObjC, C, C++
Rust Ownership async C, C++
Kotlin GC (JVM) Coroutines Java
C# GC async/await .NET
Go GC Goroutines C (cgo)

FAQ

Q: Apple platforms only? A: No. Swift is a cross-platform open-source language officially supporting macOS, iOS, Linux, and Windows. Server frameworks like Vapor and Hummingbird are used for backends.

Q: Relationship with Objective-C? A: Swift is fully compatible with ObjC (interop, shared projects). Apple's new APIs prioritize Swift. Legacy projects can migrate incrementally.

Q: Can Swift Concurrency replace GCD? A: In most scenarios, yes. async/await + actor solves data races. GCD remains a low-level tool, but higher-level code should prefer Swift Concurrency.

Sources

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