Swift Mapping for Sequences

Here is the definition of our FruitPlatter sequence once more:

sequence<Fruit> FruitPlatter;

The Slice compiler generates the following definition for the FruitPlatter sequence:

public typealias FruitPlatter = [Fruit]

As you can see, the sequence simply maps to a standard array, so you can use the sequence like any other array. For example:

// Make a small platter with one Apple and one Orange
//
let platter: FruitPlatter = [.Apple, .Orange]

There is a single exception to this mapping rule: a sequence of bytes maps to Foundation.Data and not [UInt8]:

sequence<byte> ByteSeq;

becomes:

public typealias ByteSeq = Foundation.Data

See Also

• Sequences