>> Вот только похоже в новости ошибка и это не блоки на языке Си (и вообще с Си никак не связаны), а просто разновидность замыканий
> Ну, вроде бы не совсем:
>> Support for interfacing with C blocks functionality
>> Overview: Support has been added for interfacing with Apple's blocks C-extension.
>> Notes:
>> As C blocks are very similar to anonymous methods in Delphi, we use a similar syntax to declare block types (with an
>> added cblock and either the calling convention cdecl or mwpascal to indicate the C nature). Note that the syntax to define the code executed in a block

Вот же про состояние:

They are similar to standard C functions, but in addition to executable code they may also contain variable bindings to automatic (stack) or managed (heap) memory. A block can therefore maintain a set of state (data) that it can use to impact behavior when executed. https://developer.apple.com/library/archive/documentation/Co...