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Sequences and tuples

Sequences​

[T] is an ordered sequence whose elements all have type T.

let values: [Float] = list(10., 20., 30.);
let first = values[0];

The empty literal [] works as an empty sequence of any element type. Build and take apart sequences with list, cons, head, and tail.

Tuples​

(A, B) is a fixed-size tuple whose positions can have different types. Write a trailing comma to make the syntax unambiguous.

let placement = (100., 200., true,);
let x = placement.0;
let reflected = placement.2;

The empty tuple () is the unit type.