blob: 73ea0e16db03d0d6f1dea324576ff8273fe2b4c8 (
plain)
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
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
;; Iteration utilities.
;; Anything in this file can change or disappear.
;;
;; Copyright (C) 2014-2017 Free Software Foundation, Inc.
;;
;; This file is part of GDB.
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(define-module (gdb iterator)
#:use-module (gdb)
#:use-module (gdb support))
(define-public (make-list-iterator l)
"Return a <gdb:iterator> object for a list."
(assert-type (list? l) l SCM_ARG1 'make-list-iterator "list")
(let ((next! (lambda (iter)
(let ((l (iterator-progress iter)))
(if (eq? l '())
(end-of-iteration)
(begin
(set-iterator-progress! iter (cdr l))
(car l)))))))
(make-iterator l l next!)))
(define-public (iterator->list iter)
"Return the elements of ITER as a list."
(let loop ((iter iter)
(result '()))
(let ((next (iterator-next! iter)))
(if (end-of-iteration? next)
(reverse! result)
(loop iter (cons next result))))))
(define-public (iterator-map proc iter)
"Return a list of PROC applied to each element."
(let loop ((proc proc)
(iter iter)
(result '()))
(let ((next (iterator-next! iter)))
(if (end-of-iteration? next)
(reverse! result)
(loop proc iter (cons (proc next) result))))))
(define-public (iterator-for-each proc iter)
"Apply PROC to each element. The result is unspecified."
(let ((next (iterator-next! iter)))
(if (not (end-of-iteration? next))
(begin
(proc next)
(iterator-for-each proc iter)))))
(define-public (iterator-filter pred iter)
"Return the elements that satify predicate PRED."
(let loop ((result '()))
(let ((next (iterator-next! iter)))
(cond ((end-of-iteration? next) (reverse! result))
((pred next) (loop (cons next result)))
(else (loop result))))))
(define-public (iterator-until pred iter)
"Run the iterator until the result of (pred element) is true.
Returns:
The result of the first (pred element) call that returns true,
or #f if no element matches."
(let loop ((next (iterator-next! iter)))
(cond ((end-of-iteration? next) #f)
((pred next) => identity)
(else (loop (iterator-next! iter))))))
|
