[plt-scheme] create name with syntax-case

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Hi list,

I would like to know how I should change the following snippet such that it
will define the 4 functions implementation->eval-command
implementation->interpret-command implementation->compile-command and
implementation->run-compiled-command.

(define-syntax define-accessor
  (lambda (x)
    (syntax-case ()
        ((_ field position)
         (define (implementation->field implementation)
           (let ((entry (hash-table-ref/default database implementation #f)))
             (if entry (vector-ref entry position) (error "no such
implementation known!"))))))))

(define-accessor eval-command 0)
(define-accessor interpret-command 1)
(define-accessor compile-command 2)
(define-accessor run-compiled-command 3)

Marijn
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