为什么 .c 文件可以包含块？
Why can .c files contain blocks?
我认为块是 Objective-C 功能。最近我正在将块添加到一些 C 源文件中，我发现它只是编译 OK。
我很困惑，对于*.c文件，编译器（Clang）是否应该将其视为纯C文件，为什么它可以允许块？
实际上 Clang 引入了块
to C and, by extension, Objective-C, C++, and Objective-C++
您可以在 overview 中阅读此处。
当然，使用块会使您的源代码与 C11 标准不兼容，但是，您知道，只要您的代码仅适用于 Mac OS X...
编辑：块在 GCC 中也可用，我不知道。
块的添加方式使得它们也是 Apple 编译器中的 "C" 功能。
来自 Apple 的 Blocks Programming Topics
Blocks are available in GCC and Clang as shipped with the OS X v10.6
Xcode developer tools. You can use blocks with OS X v10.6 and later,
and iOS 4.0 and later. The blocks runtime is open source and can be
found in LLVM’s compiler-rt subproject repository. Blocks have also
been presented to the C standards working group as N1370: Apple’s
Extensions to C. As Objective-C and C++ are both derived from C,
blocks are designed to work with all three languages (as well as
Objective-C++). The syntax reflects this goal.
我认为块是 Objective-C 功能。最近我正在将块添加到一些 C 源文件中，我发现它只是编译 OK。
我很困惑，对于*.c文件，编译器（Clang）是否应该将其视为纯C文件，为什么它可以允许块？
实际上 Clang 引入了块
to C and, by extension, Objective-C, C++, and Objective-C++
您可以在 overview 中阅读此处。
当然，使用块会使您的源代码与 C11 标准不兼容，但是，您知道，只要您的代码仅适用于 Mac OS X...
编辑：块在 GCC 中也可用，我不知道。
块的添加方式使得它们也是 Apple 编译器中的 "C" 功能。
来自 Apple 的 Blocks Programming Topics
Blocks are available in GCC and Clang as shipped with the OS X v10.6 Xcode developer tools. You can use blocks with OS X v10.6 and later, and iOS 4.0 and later. The blocks runtime is open source and can be found in LLVM’s compiler-rt subproject repository. Blocks have also been presented to the C standards working group as N1370: Apple’s Extensions to C. As Objective-C and C++ are both derived from C, blocks are designed to work with all three languages (as well as Objective-C++). The syntax reflects this goal.