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; ACL2 String Library
; Copyright (C) 2009-2013 Centaur Technology
;
; Contact:
; Centaur Technology Formal Verification Group
; 7600-C N. Capital of Texas Highway, Suite 300, Austin, TX 78731, USA.
; http://www.centtech.com/
;
; License: (An MIT/X11-style license)
;
; Permission is hereby granted, free of charge, to any person obtaining a
; copy of this software and associated documentation files (the "Software"),
; to deal in the Software without restriction, including without limitation
; the rights to use, copy, modify, merge, publish, distribute, sublicense,
; and/or sell copies of the Software, and to permit persons to whom the
; Software is furnished to do so, subject to the following conditions:
;
; The above copyright notice and this permission notice shall be included in
; all copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
; DEALINGS IN THE SOFTWARE.
;
; Original author: Jared Davis <jared@centtech.com>
(in-package "STR")
(include-book "iless")
(include-book "defsort/defsort" :dir :system)
(local (include-book "std/typed-lists/string-listp" :dir :system))
(ACL2::defsort
:comparablep stringp
:compare< istr<
:prefix istr)
(defthm istr-list-p-removal
(equal (istr-list-p x)
(string-listp (list-fix x)))
:hints(("Goal" :in-theory (enable istr-list-p))))
(defthm string-listp-of-istr-sort
(implies (force (string-listp x))
(string-listp (istr-sort x)))
:hints(("Goal"
:in-theory (disable istr-sort-creates-comparable-listp)
:use ((:instance istr-sort-creates-comparable-listp)))))
(defsection istrsort
:parents (ordering)
:short "Case-insensitively sort a string list."
:long "<p>This is an efficient, stable mergesort for string lists based on
@(see istr<) and implemented with the @(see acl2::defsort) book.</p>"
(defmacro istrsort (x)
`(istr-sort ,x)))
(add-macro-alias istrsort istr-sort)
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