(* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. *)
(* This file is part of GNU Modula-2.

GNU Modula-2 is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

GNU Modula-2 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 gm2; see the file COPYING.  If not, write to the Free Software
Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *)

MODULE smallset4 ;


FROM libc IMPORT exit ;

TYPE
   tokens = (eoftok, plustok, minustok, timestok, dividetok, becomestok, ambersandtok, periodtok, commatok, semicolontok, lparatok, rparatok, lsbratok, rsbratok, lcbratok, rcbratok, uparrowtok, singlequotetok, equaltok, hashtok, lesstok, greatertok, lessgreatertok, lessequaltok, greaterequaltok, periodperiodtok, colontok, doublequotestok, bartok, andtok, arraytok, begintok, bytok, casetok, consttok, definitiontok, divtok, dotok, elsetok, elsiftok, endtok, exittok, exporttok, fortok, fromtok, iftok, implementationtok, importtok, intok, looptok, modtok, moduletok, nottok, oftok, ortok, pointertok, proceduretok, qualifiedtok, unqualifiedtok, recordtok, repeattok, returntok, settok, thentok, totok, typetok, untiltok, vartok, whiletok, withtok, asmtok, volatiletok, periodperiodperiodtok, datetok, linetok, filetok, integertok, identtok, realtok, stringtok) ;

   SetOfStop0 = SET OF [eoftok..begintok] ;
   SetOfStop1 = SET OF [bytok..thentok] ;
   SetOfStop2 = SET OF [totok..stringtok] ;
   
VAR
   s0: SetOfStop0 ;
   s1: SetOfStop1 ;
   s2: SetOfStop2 ;
   i : tokens ;
BEGIN
   s0 := SetOfStop0{} ;
   s1 := SetOfStop1{} ;
   s2 := SetOfStop2{} ;
   INCL(s0, plustok) ;
   IF NOT (plustok IN s0)
   THEN
      exit(1)
   END ;
   INCL(s1, casetok) ;
   IF NOT (casetok IN s1)
   THEN
      exit(1)
   END ;
   INCL(s2, realtok) ;
   IF NOT (realtok IN s2)
   THEN
      exit(1)
   END ;
   EXCL(s0, plustok) ;
   IF s0#SetOfStop0{}
   THEN
      exit(2)
   END ;
   EXCL(s1, casetok) ;
   IF s1#SetOfStop1{}
   THEN
      exit(2)
   END ;
   EXCL(s2, realtok) ;
   IF s2#SetOfStop2{}
   THEN
      exit(2)
   END ;
   FOR i := MIN(SetOfStop0) TO MAX(SetOfStop0) DO
      INCL(s0, i) ;
      IF i IN s0
      THEN
         EXCL(s0, i) ;
         IF i IN s0
         THEN
            exit(3)
         END
      END
   END ;
   FOR i := MIN(SetOfStop1) TO MAX(SetOfStop1) DO
      INCL(s1, i) ;
      IF i IN s1
      THEN
         EXCL(s1, i) ;
         IF i IN s1
         THEN
            exit(3)
         END
      END
   END ;
   FOR i := MIN(SetOfStop2) TO MAX(SetOfStop2) DO
      INCL(s2, i) ;
      IF i IN s2
      THEN
         EXCL(s2, i) ;
         IF i IN s2
         THEN
            exit(3)
         END
      END
   END
END smallset4.