Tuples & records

Multiple values can be aggregated in a tuple or record.

A tuple is written as comma-separated list delimited by parentheses:

val t: (String, Int) = ("a", 42)

For destructing a tuple, you may use pattern matching with match:

t match { case (first, second) => first }

or irrefutable pattern matching in the left-hand side of val bindings:

val (first, second) = t

A record, on the other hand, is named and needs to be declared first:

record Vec2d(x: Int, y: Int)
val vec: Vec2d = Vec2d(1, 2)

Like in the case of tuples, records can be destructed by employing pattern matching:

vec match { case Vec2d(a, b) => a }

or by using irrefutable pattern matching in the left-hand side of val bindings:

val Vec2d(a, b) = vec
println(a) // `a` and `b` are in scope here

or by using the declared field names as accessors:

vec.x
Variables Datatypes