How do you control the way objects of a class are printed out in
BSL/ISL/etc.? I tried implementing the 'printable' interface but all that
shows up in BSL is
(instantiate (class ...) ...)
Here's what I tried:
;;; thingy.rkt ===========================
#lang racket
(provide make-thingy)
(define (make-thingy i)
(new thingy%))
(define thingy%
(class* object% (printable<%>)
(super-new)
(define/public (custom-print out quote-depth)
(fprintf out "foo"))
(define/public (custom-write out)
(fprintf out "foo" ))
(define/public (custom-display out)
(fprintf out "foo" ))))
;;; if you run just this and type (new thingy%) it displays foo
;;; thingy-bsl.rkt ===========================
;;; BSL language level
(require "thingy.rkt")
(make-thingy 0)
;;; this shows (instantiate (class ...) ...) instead of foo
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