Adding Structured Markup

Swift structured markup uses a standardized annotation template to support automatic documentation generation. Similar to other structured documentation systems like Doxygen, reStructuredText, Javadoc, Pydoc, and so forth, you embed API details into triple-slash (///) comments or double-asterisk (/** */) comment blocks:

 /// Unsafely turns an opaque C pointer into an
 /// unmanaged class reference.
 /// This operation does not change reference counts.
 /// let str: CFString = Unmanaged.fromOpaque(ptr)
 /// .takeUnretainedValue()
 /// - Parameter value: An opaque C pointer.
 /// - Returns: An unmanaged class reference to `value`.

Swift markup includes keywords like Parameter, Returns ...

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