GNU Objective-C Features

This document is meant to describe some of the GNU Objective-C features. It is not intended to teach you Objective-C. There are several resources on the Internet that present the language.

• GNU Objective-C Runtime API
  • Modern GNU Objective-C Runtime API
  • Traditional GNU Objective-C Runtime API
• +load: Executing Code before main
  • What You Can and Cannot Do in +load
• Type Encoding
  • Legacy Type Encoding
  • @encode
  • Method Signatures
• Garbage Collection
• Constant String Objects
• compatibility_alias
• Exceptions
• Synchronization
• Fast Enumeration
  • Using Fast Enumeration
  • C99-Like Fast Enumeration Syntax
  • Fast Enumeration Details
  • Fast Enumeration Protocol
• Messaging with the GNU Objective-C Runtime
  • Dynamically Registering Methods
  • Forwarding Hook