expanding lists

[Chris Uzdavinis <chris@atdesk.com>]

Suppose I have a struct:

  (define-struct x (a b c))

and I have a list:

  (define vals '(1 2 3))

Is there a way to construct the structure directly from the list?  The
constructor is expecting arguments, and I have a list of 3 elements.
I'd like to be able to do something like this:

  (make-x vals))

or somethign like that.  Otherwise to construct my struct I have to do
something that feels wrong/unnecessary:

  (make-x (car vals) (cadr vals) (caddr vals))

Is there a way to do this in one step?  Essentially, an "unlist"
capability. 

The real problem is that I'm using a regular expression to extract
multiple values from a string, and then create a struct from those
values.  But the regexp-match returns a list, and the struct wants
initializers for each member as seperate values.

Am I just missing something obvious?  (Thanks in advance.)

-- 
Chris