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Re: Problems with field initialization
On Wed, 14 Sep 2005, Andre van Tonder wrote:
Instead of having a separate <init expression> for each field, one could
simply have an <expression> for the constructor, which should evaluate to a
procedure that returns the computed fields (using VALUES, for example).
This would solve all the above problems. The overall gain in power and
simplicity would be, in my view, significant.
By the way, it has occurred to me that, if one were to consider the
functionality of INIT! to be justified, even INIT! may be dropped if the
user-provided constructor procedure is specified abstracted over the "real"
(define *the-frob* #f)
(define-type frob (lambda (real-constructor)
(let ((result (real-constructor (make-widget n))))
(set! *the-frob* result)
(fields (widget (getwid setwid!))))