(call-with-all-values producer ... consumer)
Invoke the producers and pass all values returned by them in order to consumer. This extends call-with-values by allowing more than one producer. Equivalent to Common Lisp's multiple-value-call.
(set!-values (lambda-list) expression)
Assigns the values returned by expression to the variables in lambda-list. Returns undefined values. Equivalent to Common Lisp's multiple-variable-setq.
(define-values (var ...) expr)
Defines the vars and binds them to the values of expr. May be moved to WG1 language.