source: trunk/j/src/org/armedbear/lisp/sequences.lisp @ 5231

Last change on this file since 5231 was 5231, checked in by piso, 17 years ago

SUBSEQ is now implemented in Primitives.java.

File size: 1.3 KB
Line 
1;;; sequences.lisp
2;;;
3;;; Copyright (C) 2003 Peter Graves
4;;; $Id: sequences.lisp,v 1.54 2003-12-20 17:02:49 piso Exp $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19
20(in-package "SYSTEM")
21
22(defmacro type-specifier-atom (type)
23  `(if (atom ,type) ,type (car ,type)))
24
25(defun make-sequence-of-type (type length)
26  (case (type-specifier-atom type)
27    (list (make-list length))
28    ((bit-vector simple-bit-vector) (make-array length :element-type 'bit))
29    (string (make-string length))
30    (vector (make-array length))
31    (t
32     (error 'type-error))))
33
34(defmacro make-sequence-like (sequence length)
35  `(make-sequence-of-type (type-of ,sequence) ,length))
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