- make-reia instance-payloadprocedure
Returns a newly allocated instance associated with instance-payload. This association is single and immutable, but it is possible to make use of an appropriate container payload in order to effectively associate the instance with more than one value. To make the association effectively mutable, use a mutable payload such as a box, list or vector. Instances belong to a type that is disjoint from any existing Scheme type, including types created by other calls to make-type.