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comparison lisp/alist.el @ 371:cc15677e0335 r21-2b1

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Import from CVS: tag r21-2b1
author cvs
date Mon, 13 Aug 2007 11:03:08 +0200
parents fbbf69b4e8a7
children 6719134a07c2
comparison
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370:bd866891f083 371:cc15677e0335
1 ;;; alist.el --- utility functions about association-list 1 ;;; alist.el --- utility functions about assoc-list
2 2
3 ;; Copyright (C) 1993,1994,1995,1996,1998 Free Software Foundation, Inc. 3 ;; Copyright (C) 1993,1994,1995,1996 Free Software Foundation, Inc.
4 4
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp> 5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Version:
7 ;; $Id: alist.el,v 1.1 1997/11/29 20:37:43 steve Exp $
6 ;; Keywords: alist 8 ;; Keywords: alist
7 9
8 ;; This file is part of APEL (A Portable Emacs Library). 10 ;; This file is part of SEMI (SEMI is Emacs MIME Interfaces).
9 11
10 ;; This program is free software; you can redistribute it and/or 12 ;; This program is free software; you can redistribute it and/or
11 ;; modify it under the terms of the GNU General Public License as 13 ;; modify it under the terms of the GNU General Public License as
12 ;; published by the Free Software Foundation; either version 2, or (at 14 ;; published by the Free Software Foundation; either version 2, or (at
13 ;; your option) any later version. 15 ;; your option) any later version.
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, 24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA. 25 ;; Boston, MA 02111-1307, USA.
24 26
25 ;;; Code: 27 ;;; Code:
26 28
27 ;;;###autoload
28 (defun put-alist (item value alist) 29 (defun put-alist (item value alist)
29 "Modify ALIST to set VALUE to ITEM. 30 "Modify ALIST to set VALUE to ITEM.
30 If there is a pair whose car is ITEM, replace its cdr by VALUE. 31 If there is a pair whose car is ITEM, replace its cdr by VALUE.
31 If there is not such pair, create new pair (ITEM . VALUE) and 32 If there is not such pair, create new pair (ITEM . VALUE) and
32 return new alist whose car is the new pair and cdr is ALIST. 33 return new alist whose car is the new pair and cdr is ALIST.
37 (setcdr pair value) 38 (setcdr pair value)
38 alist) 39 alist)
39 (cons (cons item value) alist) 40 (cons (cons item value) alist)
40 ))) 41 )))
41 42
42 ;;;###autoload
43 (defun del-alist (item alist) 43 (defun del-alist (item alist)
44 "If there is a pair whose key is ITEM, delete it from ALIST. 44 "If there is a pair whose key is ITEM, delete it from ALIST.
45 \[tomo's ELIS emulating function]" 45 \[tomo's ELIS emulating function]"
46 (if (equal item (car (car alist))) 46 (if (equal item (car (car alist)))
47 (cdr alist) 47 (cdr alist)
57 (setq pr r) 57 (setq pr r)
58 (setq r (cdr r)) 58 (setq r (cdr r))
59 ) 59 )
60 alist)))) 60 alist))))
61 61
62 ;;;###autoload
63 (defun set-alist (symbol item value) 62 (defun set-alist (symbol item value)
64 "Modify a alist indicated by SYMBOL to set VALUE to ITEM." 63 "Modify a alist indicated by SYMBOL to set VALUE to ITEM."
65 (or (boundp symbol) 64 (or (boundp symbol)
66 (set symbol nil) 65 (set symbol nil)
67 ) 66 )
68 (set symbol (put-alist item value (symbol-value symbol))) 67 (set symbol (put-alist item value (symbol-value symbol)))
69 ) 68 )
70 69
71 ;;;###autoload
72 (defun remove-alist (symbol item) 70 (defun remove-alist (symbol item)
73 "Remove ITEM from the alist indicated by SYMBOL." 71 "Remove ITEM from the alist indicated by SYMBOL."
74 (and (boundp symbol) 72 (and (boundp symbol)
75 (set symbol (del-alist item (symbol-value symbol))) 73 (set symbol (del-alist item (symbol-value symbol)))
76 )) 74 ))
77 75
78 ;;;###autoload
79 (defun modify-alist (modifier default) 76 (defun modify-alist (modifier default)
80 "Modify alist DEFAULT into alist MODIFIER." 77 "Modify alist DEFAULT into alist MODIFIER."
81 (mapcar (function 78 (mapcar (function
82 (lambda (as) 79 (lambda (as)
83 (setq default (put-alist (car as)(cdr as) default)) 80 (setq default (put-alist (car as)(cdr as) default))
84 )) 81 ))
85 modifier) 82 modifier)
86 default) 83 default)
87 84
88 ;;;###autoload
89 (defun set-modified-alist (sym modifier) 85 (defun set-modified-alist (sym modifier)
90 "Modify a value of a symbol SYM into alist MODIFIER. 86 "Modify a value of a symbol SYM into alist MODIFIER.
91 The symbol SYM should be alist. If it is not bound, 87 The symbol SYM should be alist. If it is not bound,
92 its value regard as nil." 88 its value regard as nil."
93 (if (not (boundp sym)) 89 (if (not (boundp sym))