/usr/lib/ats-anairiats-0.2.11/libats/SATS/itreep.sats is in ats-lang-anairiats 0.2.11-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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(* *)
(* Applied Type System *)
(* *)
(* Hongwei Xi *)
(* *)
(***********************************************************************)
(*
** ATS - Unleashing the Potential of Types!
**
** Copyright (C) 2002-2010 Hongwei Xi, Boston University
**
** All rights reserved
**
** ATS is free software; you can redistribute it and/or modify it under
** the terms of the GNU LESSER GENERAL PUBLIC LICENSE as published by the
** Free Software Foundation; either version 2.1, or (at your option) any
** later version.
**
** ATS 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 ATS; see the file COPYING. If not, please write to the
** Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
** 02110-1301, USA.
*)
(* ****** ****** *)
//
// Author: Hongwei Xi (hwxi AT cs DOT bu DOT edu)
// Time: January, 2011
//
(* ****** ****** *)
//
// HX: reasoning about integer trees
//
(* ****** ****** *)
#define ATS_STALOADFLAG 0 // there is no need for staloading at run-time
(* ****** ****** *)
staload "libats/SATS/imsetp.sats" // for handling integer multiset
(* ****** ****** *)
datasort itree =
| itree_nil of () | itree_cons of (int, itree, itree)
// end of [itree]
stadef itree_sing (x:int): itree = itree_cons (x, itree_nil, itree_nil)
(* ****** ****** *)
absprop MSETIZE (itree, imset)
(* ****** ****** *)
dataprop
itreeeq (itree, itree) =
| itreeeq_nil (
itree_nil, itree_nil
) of ()
| {x:int} {t1l,t2l:itree} {t1r,t2r:itree}
itreeeq_cons (
itree_cons (x, t1l, t1r), itree_cons (x, t2l, t2r)
) of (
itreeeq (t1l, t2l), itreeeq (t1r, t2r)
) // end of [itreeeq_cons]
// end of [itreeeq]
(* ****** ****** *)
dataprop ITREEEQ
(itree, itree) = {t:itree} ITREEEQ (t, t) of ()
// end of [ITREEEQ]
prfun itreeeq_elim
{t1,t2:itree} (pf: itreeeq (t1, t2)): ITREEEQ (t1, t2)
// end of [itreeeq_elim]
(* ****** ****** *)
dataprop TREESZ (itree, int) =
| TREESZnil (itree_nil, 0)
| {x:int} {tl,tr:itree} {nl,nr:nat}
TREESZcons (
itree_cons (x, tl, tr), 1 + nl + nr
) of (
TREESZ(tl, nl), TREESZ (tr, nr)
) // end of [TREESZcons]
// end of [TREESZ]
(* ****** ****** *)
absprop LTB (x:int, t:itree)
prfun ltb_istot {xs:itree} (): [x:int] LTB (x, xs)
prfun ltb_nil {x:int} (): LTB (x, itree_nil)
prfun ltb_cons {x0:int} {x:int | x0 < x} {xsl,xsr:itree}
(pfl: LTB (x0, xsl), pfr: LTB (x0, xsr)): LTB (x0, itree_cons (x, xsl, xsr))
// end of [ltb_cons]
prfun ltb_cons_elim {x0:int} {x:int} {xsl,xsr:itree}
(pf: LTB (x0, itree_cons (x, xsl, xsr))): [x0 < x] (LTB (x0, xsl), LTB (x0, xsr))
// end of [ltb_cons_elim]
prfun ltb_dec {x1:int}
{x2:int | x2 <= x1} {xs:itree} (pf: LTB (x1, xs)): LTB (x2, xs)
// end of [ltb_dec]
(* ****** ****** *)
absprop LTEB (x:int, t:itree)
prfun lteb_istot {xs:itree} (): [x:int] LTEB (x, xs)
prfun lteb_nil {x:int} (): LTEB (x, itree_nil)
prfun lteb_cons {x0:int} {x:int | x0 <= x} {xsl,xsr:itree}
(pfl: LTEB (x0, xsl), pfr: LTEB (x0, xsr)): LTEB (x0, itree_cons (x, xsl, xsr))
// end of [lteb_cons]
prfun lteb_cons_elim {x0:int} {x:int} {xsl,xsr:itree}
(pf: LTEB (x0, itree_cons (x, xsl, xsr))): [x0 <= x] (LTEB (x0, xsl), LTEB (x0, xsr))
// end of [lteb_cons_elim]
prfun lteb_dec {x1:int}
{x2:int | x2 <= x1} {xs:itree} (pf: LTEB (x1, xs)): LTEB (x2, xs)
// end of [lteb_dec]
(* ****** ****** *)
dataprop ISHEAP (itree) =
| ISHEAPnil (itree_nil) of ()
| {x:int} {tl,tr:itree}
ISHEAPcons (
itree_cons (x, tl, tr)
) of (
ISHEAP tl, ISHEAP tr, LTEB (x, tl), LTEB (x, tr)
) // end of [ISHEAPcons]
// end of [ISHEAP]
(* ****** ****** *)
(* end of [itreep.sats] *)
|