/usr/lib/ats-anairiats-0.2.11/prelude/SATS/extern.sats is in ats-lang-anairiats 0.2.11-1build1.
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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)
// Start Time: January 29, 2010
//
(* ****** ****** *)
#include "prelude/params.hats"
(* ****** ****** *)
//
// HX: this file is mostly used for building API's for external packages.
// The "tricks" presented here should be used sparringly in cases that do
// require special attention.
//
(* ****** ****** *)
viewdef vptrout // virtual ownership
(a:viewt@ype, l:addr) = (a @ l, a @ l -<lin,prf> void)
// end of [vptrout]
viewdef vptroutopt // optional virtual ownership
(a:viewt@ype, l:addr) = option_v (vptrout (a, l), l > null)
// end of [vptroutopt]
(* ****** ****** *)
//
// HX: note that (vt1 \minus v2) roughly means that a ticket of
// [v2] is taken from [vt1]; the ticket must be returned before
// [vt1] is consumed.
//
absview
minus_viewt0ype_view
(vt1: viewt@ype, v2: view) = vt1
stadef minus = minus_viewt0ype_view
prfun minus_addback
{vt1:viewt@ype} {v2:view} (pf1: minus (vt1, v2), pf2: v2 | x: !vt1): void
// end of [minus_addback]
(* ****** ****** *)
//
// HX-2010-04-18:
// the type [stamped] should only be used in a situation
// where the value cannot be uniquely identified by its type
//
absviewtype
stamped (a:viewtype, l:addr) = a
prfun stamped_encode
{a:viewtype} (x: !a >> stamped (a, l)):<> #[l:addr] void
// end of [stamped_encode]
prfun stamped_decode
{a:viewtype} {l:addr} (x: !stamped (a, l) >> a):<> void
// end of [stamped_decode]
(* ****** ****** *)
//
// HX-2010-11-26: mrsw: multiple-read-single-write
//
absviewt@ype
mrsw_viewt0ype_int_viewt0ype (a:viewt@ype, n:int) = a
stadef mrsw = mrsw_viewt0ype_int_viewt0ype
//
praxi mrsw_encode {a:viewt@ype} (x: !a >> mrsw (a, 0)):<prf> void
praxi mrsw_decode {a:viewt@ype} (x: !mrsw (a, 0) >> a):<prf> void
//
(* ****** ****** *)
(* end of [extern.sats] *)
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