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;; -*-theme-d-*-
;; Copyright (C) 2014 Tommi Höynälänmaa
;; Distributed under GNU General Public License version 3,
;; see file doc/GPL-3.
;; Expected results: translation and running OK
(define-proper-program (tests test149)
(import (standard-library core)
(standard-library list-utilities)
(standard-library console-io))
(define-param-class :sequence
(parameters %element))
(define-param-virtual-method sequence-ref (%element)
(((seq (:sequence %element)) (index <integer>)) %element pure)
(raise 'abstract-method))
(define-param-virtual-method sequence-length (%element)
(((seq (:sequence %element))) <integer> pure)
(raise 'abstract-method))
(define-param-class :list-as-sequence
(parameters %element)
(superclass (:sequence %element))
(fields
(contents (:uniform-list %element) module hidden)))
(define-param-virtual-method sequence-ref (%element)
(((seq (:list-as-sequence %element)) (index <integer>)) %element pure)
(uniform-list-ref (field-ref seq 'contents) index))
(define-param-virtual-method sequence-length (%element)
(((seq (:list-as-sequence %element))) <integer> pure)
(length (field-ref seq 'contents)))
(define-main-proc (() <none> nonpure)
(let* ((lst '(a b c d e))
(seq (create (:list-as-sequence <symbol>) lst))
(len (sequence-length seq)))
(do ((i <integer> 0 (+ i 1))) ((>= i len))
(console-display (sequence-ref seq i))
(console-newline)))))
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