(goops.info.gz) Next-method

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(goops.info.gz) Generic functions and methods

(goops.info.gz) Generic functions

(goops.info.gz) Example

 
 Next-method
 -----------
 
 When a generic function is called, the list of applicable methods is
 built. As mentioned before, the most specific method of this list is
 applied (see  Generic functions and methods). This method may
 call the next method in the list of applicable methods. This is done by
 using the special form `next-method'. Consider the following definitions
 
      (define-method (Test (a <integer>)) (cons 'integer (next-method)))
      (define-method (Test (a <number>))  (cons 'number  (next-method)))
      (define-method (Test a)             (list 'top))
 
 With those definitions,
 
      (Test 1)   => (integer number top)
      (Test 1.0) => (number top)
      (Test #t)  => (top)
 

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(goops.info.gz) Generic functions and methods

(goops.info.gz) Generic functions

(goops.info.gz) Example