10.1 Multiple Values
See Multiple Return Values for general information about multiple result values. In addition to call-with-values (described in this section), the let-values, let*-values, letrec-values, and define-values forms (among others) create continuations that receive multiple values.
Returns the given vs. That is, values returns its
provided arguments.
Examples:
procedure
(call-with-values generator receiver) → any
generator : (-> any) receiver : procedure?
Calls generator, and passes the values that
generator produces as arguments to receiver. Thus,
call-with-values creates a continuation that accepts any
number of values that receiver can accept. The
receiver procedure is called in tail position with respect to
the call-with-values call.
Examples:
> (call-with-values (lambda () (values 1 2)) +) 3
> (call-with-values (lambda () 1) (lambda (x y) (+ x y))) #<procedure>: arity mismatch;
the expected number of arguments does not match the given
number
expected: 2
given: 1
arguments...:
1