BlockLanguageSpec.rst

Language Specification for Blocks

• Revisions
• Overview
• The Block Type
• Block Variable Declarations
• Block Literal Expressions
• The Invoke Operator
• The Copy and Release Operations
• The __block Storage Qualifier
• Control Flow
• Objective-C Extensions
• C++ Extensions

Revisions

• 2008/2/25 --- created
• 2008/7/28 --- revised, __block syntax
• 2008/8/13 --- revised, Block globals
• 2008/8/21 --- revised, C++ elaboration
• 2008/11/1 --- revised, __weak support
• 2009/1/12 --- revised, explicit return types
• 2009/2/10 --- revised, __block objects need retain

Overview

A new derived type is introduced to C and, by extension, Objective-C, C++, and Objective-C++

The Block Type