You can have protection and subclassing like in the (running) sketch below.
Something like this may work for structs. -- Matthias
#lang racket
(module server racket
(provide
;; exists: Class c%
;; Any -> (Instance-of c%)
make-c
;; Any -> Boolean
is-c%?
;;
On Tue, May 27, 2014 at 07:25:34PM +1200, Aidan Gauland wrote:
> What's the nearest equivalent for a struct to constructors for class
> instances? Say I have a struct with a field that should be initialised
> to a three-element vector. Right now, I'm just defining a wrapper
> make-blah.
>
> (str
It is not what you need.
When you create a new structure, the constructor is the thing that
makes it... in your example that's "blah". The keyword you mentioned
lets you change that name to something like "mother-in-law", so
(struct blah (a b c v) #:constructor-name mother-in-law)
(mother-in-law
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