/usr/lib/ats2-postiats-0.2.6/prelude/SATS/option.sats is in ats2-lang 0.2.6-2.
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 *)
(* *)
(***********************************************************************)
(*
** ATS/Postiats - Unleashing the Potential of Types!
** Copyright (C) 2010-2013 Hongwei Xi, ATS Trustful Software, Inc.
** All rights reserved
**
** ATS is free software; you can redistribute it and/or modify it under
** the terms of the GNU GENERAL PUBLIC LICENSE (GPL) as published by the
** Free Software Foundation; either version 3, 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.
*)
(* ****** ****** *)
(*
** Source:
** $PATSHOME/prelude/SATS/CODEGEN/option.atxt
** Time of generation: Sat Jun 27 21:39:12 2015
*)
(* ****** ****** *)
(* Author: Hongwei Xi *)
(* Authoremail: hwxi AT cs DOT bu DOT edu *)
(* Start time: February, 2012 *)
(* ****** ****** *)
sortdef t0p = t@ype
(* ****** ****** *)
#if(0)
//
// HX: these decls are available in [basic_dyn.sats]
//
stadef option = option_t0ype_bool_type
typedef Option (a:t0p) = [b:bool] option (a, b)
#endif
(* ****** ****** *)
exception NotSomeExn of ()
(*
fun NotSomeExn ():<> exn = "mac#%NotSomeExn_make"
fun isNotSomeExn (x: !exn):<> bool = "mac#%isNotSomeExn"
macdef
ifNotSomeExn
{tres}(exn, body) =
(
let val x = ,(exn) in
(
if isNotSomeExn(x)
then
let prval () = __vfree_exn (x) in ,(body) end
else $raise (x)
) : tres // end of [if]
end (* end of [let] *)
) // end of [ifNotSomeExn]
*)
(* ****** ****** *)
//
castfn
option_cast
{a:t0p}{b:bool}
(opt: option (INV(a), b)):<> option (a, b)
//
(* ****** ****** *)
//
castfn
option_vt2t
{a:t0p}{b:bool}
(opt: option_vt (INV(a), b)):<> option (a, b)
castfn
option_of_option_vt
{a:t0p}{b:bool}
(opt: option_vt (INV(a), b)):<> option (a, b)
//
(* ****** ****** *)
fun{a:t0p}
option_some (x: a):<> option (a, true)
fun{a:t0p}
option_none ((*void*)):<> option (a, false)
(* ****** ****** *)
fun{}
option_is_some{a:t0p}
{b:bool} (opt: option (a, b)):<> bool (b)
// end of [option_is_some]
fun{}
option_is_none{a:t0p}
{b:bool} (opt: option (a, b)):<> bool (~b)
// end of [option_is_none]
(* ****** ****** *)
fun{a:t0p}
option_unsome (opt: option (INV(a), true)):<> a
fun{a:t0p}
option_unsome_exn (opt: Option (INV(a))):<!exn> a
(* ****** ****** *)
//
fun{a:t0p}
option_equal$eqfn (a, a):<> bool
fun{a:t0p}
option_equal
(opt1: Option(a), opt2: Option(a)):<> bool
//
(* ****** ****** *)
//
fun{a:t0p}
fprint_option
(out: FILEref, opt: Option (INV(a))): void
//
overload fprint with fprint_option
//
(* ****** ****** *)
//
// overloading for certain symbols
//
(* ****** ****** *)
overload = with option_equal
(* ****** ****** *)
overload iseqz with option_is_none
overload isneqz with option_is_some
(* ****** ****** *)
(* end of [option.sats] *)
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