Objectively
Object oriented framework for C.
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Objectively

Object oriented framework for C.

View on GitHub — Zlib license.

About

Objectively is a cross-platform framework that provides rich object-oriented semantics to enable OOP in C.

Features

  • Cross-platform support for Android, iOS, macOS, Linux and Windows
  • Single-parent inheritance with starts-with struct composition
  • Class and instance methods with strongly typed interfaces
  • Automatic class loading and lifecycle management
  • Automatic memory management with reference counting
  • Unicode strings with multibyte character set support
  • Collections for Objects and C types: Array, Dictionary, List, Set and more
  • JSON parsing, marshaling, and JSONPath queries
  • Concurrency: Lock, Condition, Thread, Operation, OperationQueue
  • Networking: URLSession, JSONContext & RESTClient

tl;dr

Objectively brings classes, single-parent inheritance, strongly typed methods and reference counting to plain C — no C++, and no code generation.

Declare a type once, then instantiate and use it like any other:

Hello *hello = $(alloc(Hello), initWithGreeting, "Hello, World!");
$(hello, sayHello);
hello = release(hello);
release
ident release(ident obj)
Atomically decrement the given Object's reference count. If the resulting reference count is 0,...
Definition Class.c:195
alloc
#define alloc(type)
Allocate and initialize and instance of type.
Definition Class.h:176

alloc and release manage the lifecycle, $ dispatches through the type's interface, and super, method overrides and shared instances all behave exactly as you'd expect from an object oriented language.

Getting Started

Consult the Installing Objectively for dependencies, building, and linking.

User Guide

Consult the Objectively User Guide to declare, implement, and use your own types.

Class Hierarchy

Browse the Class Hierarchy to navigate the full API.