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I am currently working with CoreAudio in Swift. And there is a structure called AudioBufferList. It has a property mBuffers, which has type (AudioBuffer) and described as "A variable length array of AudioBuffer structures".

Since Array in Swift is defined as [Type], and I can not find anything about declaring an Array as (Type) I do wonder how is that possible that (Type) is also an Array and how to work with it?

Thank you for your help.

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  • Without more context your question is quite unclear. Please include the actual code you're having problem with. Commented Sep 5, 2017 at 9:53

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This is not an array, it's the same as AudioBuffer without parentheses.

The manual says:

You can put parentheses around a named type or a compound type. However, adding parentheses around a type doesn’t have any effect. For example, (Int) is equivalent to Int. (from here)

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2 Comments

So the Apple documentation about AudioBufferList is simply misleading then.
@Igor I think the reason for having parentheses in the documentation is that the source file is generated automatically from Objective-C definitions, and nobody took time to clean it up manually.

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