Programming Swift

The Swift Programming Language

The entire content of The Swift Programming Language (6.3) book by Apple. This is a comprehensive language reference and guide to the Swift programming language.

Documentation Structure

Getting Started (GuidedTour)

• About Swift ([GuidedTour/AboutSwift.md](GuidedTour/AboutSwift.md)): Understand the high-level goals of the language.
• Version Compatibility ([GuidedTour/Compatibility.md](GuidedTour/Compatibility.md)): Learn what functionality is available in older language modes.
• A Swift Tour ([GuidedTour/GuidedTour.md](GuidedTour/GuidedTour.md)): Explore the features and syntax of Swift.

Language Guide

• The Basics ([LanguageGuide/TheBasics.md](LanguageGuide/TheBasics.md)): Work with common kinds of data and write basic syntax.
• Basic Operators ([LanguageGuide/BasicOperators.md](LanguageGuide/BasicOperators.md)): Perform operations like assignment, arithmetic, and comparison.
• Strings and Characters ([LanguageGuide/StringsAndCharacters.md](LanguageGuide/StringsAndCharacters.md)): Store and manipulate text.
• Collection Types ([LanguageGuide/CollectionTypes.md](LanguageGuide/CollectionTypes.md)): Organize data using arrays, sets, and dictionaries.
• Control Flow ([LanguageGuide/ControlFlow.md](LanguageGuide/ControlFlow.md)): Structure code with branches, loops, and early exits.
• Functions ([LanguageGuide/Functions.md](LanguageGuide/Functions.md)): Define and call functions, label their arguments, and use their return values.
• Closures ([LanguageGuide/Closures.md](LanguageGuide/Closures.md)): Group code that executes together, without creating a named function.
• Enumerations ([LanguageGuide/Enumerations.md](LanguageGuide/Enumerations.md)): Model custom types that define a list of possible values.
• Structures and Classes ([LanguageGuide/ClassesAndStructures.md](LanguageGuide/ClassesAndStructures.md)): Model custom types that encapsulate data.
• Properties ([LanguageGuide/Properties.md](LanguageGuide/Properties.md)): Access stored and computed values that are part of an instance or type.
• Methods ([LanguageGuide/Methods.md](LanguageGuide/Methods.md)): Define and call functions that are part of an instance or type.
• Subscripts ([LanguageGuide/Subscripts.md](LanguageGuide/Subscripts.md)): Access the elements of a collection.
• Inheritance ([LanguageGuide/Inheritance.md](LanguageGuide/Inheritance.md)): Subclass to add or override functionality.
• Initialization ([LanguageGuide/Initialization.md](LanguageGuide/Initialization.md)): Set the initial values for a type's stored properties and perform one-time setup.
• Deinitialization ([LanguageGuide/Deinitialization.md](LanguageGuide/Deinitialization.md)): Release resources that require custom cleanup.
• Optional Chaining ([LanguageGuide/OptionalChaining.md](LanguageGuide/OptionalChaining.md)): Access members of an optional value without unwrapping.
• Error Handling ([LanguageGuide/ErrorHandling.md](LanguageGuide/ErrorHandling.md)): Respond to and recover from errors.
• Concurrency ([LanguageGuide/Concurrency.md](LanguageGuide/Concurrency.md)): Perform asynchronous operations.
• Macros ([LanguageGuide/Macros.md](LanguageGuide/Macros.md)): Use macros to generate code at compile time.
• Type Casting ([LanguageGuide/TypeCasting.md](LanguageGuide/TypeCasting.md)): Determine a value's runtime type and give it more specific type information.
• Nested Types ([LanguageGuide/NestedTypes.md](LanguageGuide/NestedTypes.md)): Define types inside the scope of another type.
• Extensions ([LanguageGuide/Extensions.md](LanguageGuide/Extensions.md)): Add functionality to an existing type.
• Protocols ([LanguageGuide/Protocols.md](LanguageGuide/Protocols.md)): Define requirements that conforming types must implement.
• Generics ([LanguageGuide/Generics.md](LanguageGuide/Generics.md)): Write code that works for multiple types and specify requirements for those types.
• Opaque and Boxed Protocol Types ([LanguageGuide/OpaqueTypes.md](LanguageGuide/OpaqueTypes.md)): Hide implementation details about a value's type.
• Automatic Reference Counting ([LanguageGuide/AutomaticReferenceCounting.md](LanguageGuide/AutomaticReferenceCounting.md)): Model the lifetime of objects and their relationships.
• Memory Safety ([LanguageGuide/MemorySafety.md](LanguageGuide/MemorySafety.md)): Structure your code to avoid conflicts when accessing memory.
• Access Control ([LanguageGuide/AccessControl.md](LanguageGuide/AccessControl.md)): Manage the visibility of code by declaration, file, and module.
• Advanced Operators ([LanguageGuide/AdvancedOperators.md](LanguageGuide/AdvancedOperators.md)): Define custom operators, perform bitwise operations, and use builder syntax.

Reference Manual

• About the Language Reference ([ReferenceManual/AboutTheLanguageReference.md](ReferenceManual/AboutTheLanguageReference.md)): Read the notation that the formal grammar uses.
• Lexical Structure ([ReferenceManual/LexicalStructure.md](ReferenceManual/LexicalStructure.md)): Use the lowest-level components of the syntax.
• Types ([ReferenceManual/Types.md](ReferenceManual/Types.md)): Use built-in named and compound types.
• Expressions ([ReferenceManual/Expressions.md](ReferenceManual/Expressions.md)): Access, modify, and assign values.
• Statements ([ReferenceManual/Statements.md](ReferenceManual/Statements.md)): Group expressions and control the flow of execution.
• Declarations ([ReferenceManual/Declarations.md](ReferenceManual/Declarations.md)): Introduce types, operators, variables, and other names and constructs.
• Attributes ([ReferenceManual/Attributes.md](ReferenceManual/Attributes.md)): Add information to declarations and types.
• Patterns ([ReferenceManual/Patterns.md](ReferenceManual/Patterns.md)): Match and destructure values.
• Generic Parameters and Arguments ([ReferenceManual/GenericParametersAndArguments.md](ReferenceManual/GenericParametersAndArguments.md)): Generalize declarations to abstract away concrete types.

Usage Notes

• Organized progressively: GuidedTour → LanguageGuide → ReferenceManual

License & Attribution

This skill contains content from The Swift Programming Language, distributed under the Apache 2.0 License.

Copyright © Apple Inc. and the Swift project authors.

This package is a derivative work that aggregates the original markdown content into a structure optimized for LLM context.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: kylehughes
• Source: kylehughes/the-unofficial-swift-programming-language-skill
• License: MIT

Install and usage instructions live in the source repository linked above.