/usr/share/acl2-4.3/books/unicode/intern-in-package-of-symbol.lisp is in acl2-books-source 4.3-3.
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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 | ;; Processing Unicode Files with ACL2
;; Copyright (C) 2005-2006 by Jared Davis <jared@cs.utexas.edu>
;;
;; 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 2 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, write to the Free Software Foundation, Inc., 59 Temple
;; Place - Suite 330, Boston, MA 02111-1307, USA.
(in-package "ACL2")
(local (defthm intern-in-package-of-symbol-lemma
(implies (and (stringp a)
(stringp b)
(symbolp in-pkg)
(not (equal a b)))
(not (equal (intern-in-package-of-symbol a in-pkg)
(intern-in-package-of-symbol b in-pkg))))
:hints(("Goal"
:use ((:instance symbol-name-intern-in-package-of-symbol
(s a) (any-symbol in-pkg))
(:instance symbol-name-intern-in-package-of-symbol
(s b) (any-symbol in-pkg)))))))
(defthm equal-of-intern-in-package-of-symbols
(implies (and (stringp a)
(stringp b)
(symbolp in-pkg))
(equal (equal (intern-in-package-of-symbol a in-pkg)
(intern-in-package-of-symbol b in-pkg))
(equal a b))))
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