text: Tuples are used for creating aggregates of values. They provide a convenient way of lumping together a set of values without having to type in a new class definition first.
  Type Declaration
  <type1, type2, .., typen>
  Example
  <int, str>
  <str, double, int>
  Literal Syntax
  <expr1, expr2, .., exprn>
  where each exprn is an expression that is a subtype of typen.
  Example
  <1, "one">
  <"configura", 3.14, factorial(3)>
  Tuple Class
  Tuple declarations create new classes on demand. These classes always belong to the cm.lang package and inherit from Tuple.
  Fields
  The fields of a tuple are named v1, v2 .. vn, where n is the position of the field in the declaration, counting from left with 0 as the first position. The leftmost field is thus called v0, the second v1, and so on.
  Methods
  Tuples have one constructor and a method called toS() that returns a human-readable description of the tuple object.
  Example
  The following tuple type:
  <str, int>
  is equivalent to this class definition, but unnamed:
  use cm.lang; public class ExampleTuple extends Tuple { public str v0; public int v1; public constructor(str v0, int v1) { this.v0 = v0; this.v1 = v1; } public str toS() { return '<' # v0 # ", " # v1 # '>'; } }
  Parallel Assignment
  The fields of a tuple object can be assigned in parallel using the normal assignment operator.
  Example
  <str, int> pair = <"one", 1>;
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