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(*
Copyright (c) 2000
Cambridge University Technical Services Limited
This library 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 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
(***
Defines datatypes used to communicate
with new primitive: call_sym_and_convert.
***)
signature UnionSig =
sig
(* raised if a destructor is given the wrong argument *)
exception Never of string;
(*
datatype 'a union =
Vol of 'a
| Char of string
| Double of real
| Float of real
| Int of int
| Long of int
| Short of int
| String of string;
*)
type 'a union
val Vol : 'a -> 'a union;
val Char : char -> 'a union;
val Double : real -> 'a union;
val Float : real -> 'a union;
val Int : int -> 'a union;
val Long : int -> 'a union;
val Short : int -> 'a union;
val String : string -> 'a union;
val Uint : int -> 'a union;
val isVol : 'a union -> bool;
val isChar : 'a union -> bool;
val isDouble : 'a union -> bool;
val isFloat : 'a union -> bool;
val isInt : 'a union -> bool;
val isLong : 'a union -> bool;
val isShort : 'a union -> bool;
val isString : 'a union -> bool;
val isUint : 'a union -> bool;
val deVol : 'a union -> 'a;
val deChar : 'a union -> char;
val deDouble : 'a union -> real;
val deFloat : 'a union -> real;
val deInt : 'a union -> int;
val deLong : 'a union -> int;
val deShort : 'a union -> int;
val deString : 'a union -> string;
val deUint : 'a union -> int;
(* ...
datatype 'ctype unionChoice =
chooseVol of 'ctype
| chooseChar
| chooseDouble
| chooseFloat
| chooseInt
| chooseLong
| chooseShort
| chooseString;
... *)
type 'a unionChoice;
val chooseChar : 'a unionChoice;
val chooseDouble : 'a unionChoice;
val chooseFloat : 'a unionChoice;
val chooseInt : 'a unionChoice;
val chooseLong : 'a unionChoice;
val chooseShort : 'a unionChoice;
val chooseString : 'a unionChoice;
val chooseVol : 'a -> 'a unionChoice;
val chooseUint : 'a unionChoice;
val isChooseChar : 'a unionChoice -> bool;
val isChooseDouble : 'a unionChoice -> bool;
val isChooseFloat : 'a unionChoice -> bool;
val isChooseInt : 'a unionChoice -> bool;
val isChooseLong : 'a unionChoice -> bool;
val isChooseShort : 'a unionChoice -> bool;
val isChooseString : 'a unionChoice -> bool;
val isChooseVol : 'a unionChoice -> bool;
val isChooseUint : 'a unionChoice -> bool;
val deChooseVol : 'a unionChoice -> 'a;
(* ...
datatype ('ctype, 'vol) directedArg =
In of ('ctype * 'vol) union
| Out of 'ctype unionChoice;
... *)
type ('a,'b) directedArg;
val In : ('a * 'b) union -> ('a,'b) directedArg;
val Out : 'a unionChoice -> ('a,'b) directedArg;
val isIn : ('a,'b) directedArg -> bool;
val isOut : ('a,'b) directedArg -> bool ;
val deIn : ('a,'b) directedArg -> ('a * 'b) union;
val deOut : ('a,'b) directedArg -> 'a unionChoice;
val mapUnion : ('a -> 'b) -> 'a union -> 'b union
val mapUnionChoice : ('a -> 'b) -> 'a unionChoice -> 'b unionChoice
val mapDirectedArg :
('a -> 'b) ->
('c -> 'd) -> ('a, 'c) directedArg -> ('b, 'd) directedArg
end;
|
