8.1 Tuples

The Tuple Type is a fixed size type (i.e.: we cannot remove or add values from/to a tuple) that groups together values of miscellaneous types.

Tuples are declared using parenthesis, and commas to separate values:

let t = (5, 'h', 11.7);
t

To declare explicitly the types of the values, we use a tuple of types:

let u: (i8, f32, char) = (34, 78.56, 'a');
u

The values of a tuple are indexable:

let t = (5, 'h', 11.7);
t.2

We may decompose an existing tuple, by using a tuple of variables inside the let declaration. Some values may be ignored by using the _ (underscore) notation:

let t = (5, 'h', 11.7);
let (_, c, _) = t;
c