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From: Mikael Djurfeldt <mikael@djurfeldt.com>
To: Damien Mattei <damien.mattei@gmail.com>
Cc: guile-user <guile-user@gnu.org>
Subject: Re: GOOPS question
Date: Fri, 30 Apr 2021 09:55:18 +0200	[thread overview]
Message-ID: <CAA2XvwK5T9eb7TTgVaZY0jWcsuxYCUpk7TM=xu2Wkmw+Bmi6EA@mail.gmail.com> (raw)
In-Reply-To: <CADEOadc09aequx31A7yQc8cYFta-WTH_Bp-qjWv3posOv5jcWw@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 1003 bytes --]

Hi!

I attach a template which you could build on. Please post your class when
you're done. :)

Best regards,
Mikael

On Fri, Apr 30, 2021 at 1:11 AM Damien Mattei <damien.mattei@gmail.com>
wrote:

> hi,
> i want to create a growable vector class in Guile,
> such as std::vector or python list,
> first i do not know if it exist already? seems not
>
> i want to use GOOPS but i do not understand how the superclass could be
> accessed,used, instanciate...
> for example in the doc there is:
> (define-class <my-complex> (<number>) r i #:name "Complex")
>
> seems <number> superclass is of no use
>
> for my growable vector i would like to use array as superclass?
> but perhaps should it be just a slot as array are a subset of growable
> array ,so a subclass
>
> anyway if i write something ike that:
> (define-class <gvector> (<array>) .....
> how can i use the <array> object?
>
> i think perhaps i should not define a superclass or <object> as super
> class....
> any advice welcome...
>
> Damien
>

[-- Attachment #2: gvector.scm --]
[-- Type: text/x-scheme, Size: 1171 bytes --]

(define-module (oop gvector)
  #:use-module (oop goops)
  #:use-module ((guile)
		#:select (vector-length vector-ref vector-set!)
		#:prefix orig:)
  #:export (<gvector>)
  #:replace (vector-length vector-ref vector-set!))

;;; Constants

(define *initial-allocated-size* 8)

;;; Capture original bindings of vector getters and setters

(define-generic vector-length)

(define-method (vector-length (v <vector>))
  (orig:vector-length v))

(define-generic vector-set!)

(define-method (vector-set! (gv <vector>) (i <integer>) obj)
  (orig:vector-set! gv i obj))

(define-generic vector-ref)

(define-method (vector-ref (gv <vector>) (i <integer>))
  (orig:vector-ref gv i))

;;; The <gvector> class

(define-class <gvector> (<vector>)
  (v #:init-value (make-vector *initial-allocated-size*) #:getter v)
  (length #:init-value 0 #:getter vector-length))

(define (assert-size! gv i)
  (if (>= i (length gv))
      *unspecified*)) ; do nothing for now

(define-method (vector-set! (gv <gvector>) (i <integer>) obj)
  (assert-size! gv i)
  (vector-set! (v gv) i obj))

(define-method (vector-ref (gv <gvector>) (i <integer>))
  (assert-size! gv i)
  (vector-ref (v gv) i))

  parent reply	other threads:[~2021-04-30  7:55 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-29 23:10 GOOPS question Damien Mattei
2021-04-30  5:52 ` Atom X
2021-04-30  7:55 ` Mikael Djurfeldt [this message]
2021-05-02  0:07   ` Damien Mattei
2021-05-02 10:14     ` Damien Mattei
2021-05-02 10:26       ` Mikael Djurfeldt
2021-05-02 10:58         ` Damien Mattei
2021-05-02 10:34       ` Damien Mattei
2021-05-02 10:35       ` tomas
2021-05-02 10:21     ` Mikael Djurfeldt
2021-05-08 21:11       ` Damien Mattei
2021-05-10 12:22         ` Mikael Djurfeldt
2021-04-30  7:57 ` Linus Björnstam
2021-04-30  9:47   ` Damien Mattei
2021-04-30 10:43     ` Mikael Djurfeldt
2021-04-30 11:08 ` Mikael Djurfeldt
2021-04-30 12:19   ` Stefan Israelsson Tampe
2021-04-30 14:50     ` Mikael Djurfeldt
2021-04-30 15:15       ` Mikael Djurfeldt
     [not found] <Pine.GSO.4.05.10207071043010.9685-100000@sallust.ida.ing.tu-bs.de>
2002-07-08 18:26 ` goops question Marius Vollmer
     [not found] ` <87fzyu9iu0.fsf@zagadka.ping.de>
2002-07-08 19:59   ` Dirk Herrmann
2002-07-09 21:17   ` Neil Jerram
  -- strict thread matches above, loose matches on Subject: below --
2002-07-07  8:45 Dirk Herrmann

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