1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
;; -*-theme-d-*-
;; Copyright (C) 2008-2013 Tommi Höynälänmaa
;; Distributed under GNU General Public License version 3,
;; see file doc/GPL-3.
;; Expected results: translation and running OK
;; Expected output: b
(define-proper-program (tests test8)
(import (standard-library core)
(standard-library console-io))
(define-param-logical-type :assoc-list (%key %value)
(:uniform-list (:pair %key %value)))
(define-param-proc get-assoc (%key %value)
(((lst (:assoc-list %key %value)) (key %key)) (:maybe %value) pure)
(if (equal? lst null)
null
(let* ((lst2 (cast (:nonempty-uniform-list (:pair %key %value)) lst))
(cur-pair (car lst2)))
(if (equal? (car cur-pair) key)
(cdr cur-pair)
(get-assoc (cdr lst2) key)))))
(define main
(lambda (() <none> nonpure)
(let ((my-list (:uniform-list (:pair <integer> <string>))
(list (cons 1 "a") (cons 2 "b") (cons 3 "c"))))
(console-display (get-assoc my-list 2))
(console-newline)))))
|
