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- Blocks_(C_language_extension) abstract "Blocks are a nonstandard extension added by Apple Inc. to their implementations of the C, C++, and Objective-C programming languages that uses a lambda expression-like syntax to create closures within these languages. Blocks are supported for programs developed for Mac OS X 10.6+ and iOS 4.0+, although third-party runtimes allow use on Mac OS X 10.5 and iOS 2.2+.Apple designed blocks with the explicit goal of making it easier to write programs for the Grand Central Dispatch threading architecture, although it is independent of that architecture and can be used in much the same way as closures in other languages. Apple has implemented blocks both in their own branch of the GNU Compiler Collection and in the Clang LLVM compiler front end. Language runtime library support for blocks is also available as part of the LLVM project. The Khronos group uses blocks syntax to enqueue kernels from within kernels as of version 2.0 of OpenCL.Like function definitions, blocks can take arguments, and declare their own variables internally. Unlike ordinary C function definitions, their value can capture state from their surrounding context. A block definition produces an opaque value which contains both a reference to the code within the block and a snapshot of the current state of local stack variables at the time of its definition. The block may be later invoked in the same manner as a function pointer. The block may be assigned to variables, passed to functions, and otherwise treated like a normal function pointer, although the application programmer (or the API) must mark the block with a special operator (Block_copy) if it's to be used outside the scope in which it was defined.Given a block value, the code within the block can be executed at any later time by calling it, using the same syntax that would be used for calling a function.".
- Blocks_(C_language_extension) wikiPageID "24318293".
- Blocks_(C_language_extension) wikiPageRevisionID "589044465".
- Blocks_(C_language_extension) hasPhotoCollection Blocks_(C_language_extension).
- Blocks_(C_language_extension) subject Category:C_programming_language.
- Blocks_(C_language_extension) subject Category:Subroutines.
- Blocks_(C_language_extension) type Abstraction100002137.
- Blocks_(C_language_extension) type Code106355894.
- Blocks_(C_language_extension) type CodingSystem106353757.
- Blocks_(C_language_extension) type Communication100033020.
- Blocks_(C_language_extension) type Routine106582403.
- Blocks_(C_language_extension) type Software106566077.
- Blocks_(C_language_extension) type Subroutines.
- Blocks_(C_language_extension) type Writing106359877.
- Blocks_(C_language_extension) type WrittenCommunication106349220.
- Blocks_(C_language_extension) comment "Blocks are a nonstandard extension added by Apple Inc. to their implementations of the C, C++, and Objective-C programming languages that uses a lambda expression-like syntax to create closures within these languages.".
- Blocks_(C_language_extension) label "Blocks (C language extension)".
- Blocks_(C_language_extension) label "Блоки (расширение языка Си)".
- Blocks_(C_language_extension) label "ブロック (C言語拡張)".
- Blocks_(C_language_extension) label "块 (C语言扩展)".
- Blocks_(C_language_extension) sameAs ブロック_(C言語拡張).
- Blocks_(C_language_extension) sameAs m.07s9h59.
- Blocks_(C_language_extension) sameAs Q4088295.
- Blocks_(C_language_extension) sameAs Q4088295.
- Blocks_(C_language_extension) sameAs Blocks_(C_language_extension).
- Blocks_(C_language_extension) wasDerivedFrom Blocks_(C_language_extension)?oldid=589044465.
- Blocks_(C_language_extension) isPrimaryTopicOf Blocks_(C_language_extension).