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;; -*-theme-*-
;; Copyright (C) 2014, 2021 Tommi Höynälänmaa
;; Distributed under GNU Lesser General Public License version 3,
;; see file doc/LGPL-3.
(define-body (examples vector-as-sequence)
(define-param-virtual-method sequence-ref (%element)
(((seq (:vector-as-sequence %element)) (index <integer>))
%element pure)
(vector-ref (field-ref seq 'contents) index))
(define-param-virtual-method sequence-length (%element)
(((seq (:vector-as-sequence %element))) <integer> pure)
(vector-length (field-ref seq 'contents)))
(define-param-virtual-method sequence-map (%source %target)
(((proc (:procedure (%source) %target pure))
(seq (:vector-as-sequence %source)))
(:vector-as-sequence %target) force-pure)
(let* ((source-vec (field-ref seq 'contents))
(len (vector-length source-vec))
(result (make-mutable-vector (:maybe %target) len null)))
(do ((i <integer> 0 (+ i 1))) ((>= i len))
(mutable-vector-set! result i (proc (vector-ref source-vec i))))
(let* ((result1 (cast-vector %target result))
(result2
(create (:vector-as-sequence %target) result1)))
result2))))
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