(* M2Reserved.def determines is a token is a reserved word.

Copyright (C) 2001-2024 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.

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 3, 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 GNU Modula-2; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  *)

DEFINITION MODULE M2Reserved ;

(*
   Author     : Gaius Mulley
   Title      : M2Reserved
   Date       : 15/5/87
   Description: implements a procedure to determine if a symbol is a
                Modula-2 reserved word and provides conversion between
                toktype and the equivalent stringed, Name.
*)

FROM NameKey IMPORT Name ;

EXPORT QUALIFIED IsReserved, tokToTok,

   NulTok, PlusTok, MinusTok, TimesTok, DivideTok, BecomesTok,
   AmbersandTok, PeriodTok, CommaTok, SemiColonTok, LParaTok,
   LSBraTok, LCBraTok, UpArrowTok, SingleQuoteTok, EqualTok,
   HashTok, LessTok, GreaterTok, LessGreaterTok, LessEqualTok,
   GreaterEqualTok, PeriodPeriodTok, ColonTok, RParaTok,
   RSBraTok, RCBraTok, BarTok, DoubleQuotesTok,

   AndTok, ArrayTok, BeginTok, ByTok, CaseTok, ConstTok,
   DefinitionTok, DivTok, DoTok, ElseTok, ElsifTok, EndTok,
   ExceptTok,
   ExitTok, ExportTok, FinallyTok, ForTok, ForwardTok,
   FromTok, IfTok,
   ImplementationTok, ImportTok, InTok, LoopTok, ModTok,
   ModuleTok, NotTok, OfTok, OrTok,
   PackedSetTok, PointerTok, ProcedureTok,
   QualifiedTok, UnQualifiedTok, RecordTok, RetryTok,
   RemTok, RepeatTok,
   ReturnTok, SetTok, ThenTok, ToTok, TypeTok, UntilTok, VarTok,
   WhileTok, WithTok,

   (* additional tokens which extend PIM Modula-2 slightly *)
   EofTok, AsmTok, VolatileTok, DateTok, LineTok, FileTok,
   AttributeTok, BuiltinTok, InlineTok,
   toktype ;

TYPE
   toktype = (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,
              ldirectivetok, rdirectivetok,
              periodperiodtok,
              colontok, doublequotestok, bartok, andtok,
              arraytok, begintok, bytok, casetok, consttok,
              definitiontok, divtok, dotok, elsetok, elsiftok,
              endtok, excepttok, exittok, exporttok, finallytok,
              fortok, forwardtok, fromtok, iftok, implementationtok,
              importtok, intok, looptok, modtok,
              moduletok, nottok, oftok, ortok,
              packedsettok, pointertok, proceduretok,
              qualifiedtok, unqualifiedtok,
              recordtok, remtok, repeattok, retrytok, returntok,
              settok, thentok,
              totok, typetok, untiltok, vartok, whiletok, withtok,
              asmtok, volatiletok, periodperiodperiodtok,
              datetok, linetok, filetok,
              attributetok, builtintok, inlinetok,
              integertok, identtok, realtok, stringtok,
              virtualrangetok) ;

VAR
   NulTok, PlusTok, MinusTok, TimesTok, DivideTok, BecomesTok,
   AmbersandTok, PeriodTok, CommaTok, SemiColonTok, LParaTok,
   LSBraTok, LCBraTok, UpArrowTok, SingleQuoteTok, EqualTok,
   HashTok, LessTok, GreaterTok, LessGreaterTok, LessEqualTok,
   GreaterEqualTok, LDirectiveTok, RDirectiveTok,
   PeriodPeriodTok, ColonTok, RParaTok,
   RSBraTok, RCBraTok, BarTok, DoubleQuotesTok,

   AndTok, ArrayTok, BeginTok, ByTok, CaseTok, ConstTok,
   DefinitionTok, DivTok, DoTok, ElseTok, ElsifTok, EndTok,
   ExceptTok, ExitTok, ExportTok, FinallyTok, ForTok,
   ForwardTok, FromTok,
   IfTok, ImplementationTok, ImportTok, InTok, LoopTok, ModTok,
   ModuleTok, NotTok, OfTok, OrTok,
   PackedSetTok, PointerTok, ProcedureTok,
   QualifiedTok, UnQualifiedTok, RecordTok, RemTok, RepeatTok,
   RetryTok, ReturnTok, SetTok, ThenTok, ToTok, TypeTok,
   UntilTok, VarTok, WhileTok, WithTok,

   EofTok, AsmTok, VolatileTok,
   DateTok, LineTok, FileTok,
   AttributeTok, BuiltinTok, InlineTok: Name ;


(*
   IsReserved - returns TRUE if the symbol, Name, is a reserved word.
                If TRUE it also sets tok to the appropriate enumerated
                value.
*)

PROCEDURE IsReserved (n: Name; VAR tok: toktype) : BOOLEAN ;


(*
   tokToTok - returns a Tok given the enumerated variable, t.
*)

PROCEDURE tokToTok (t: toktype) : Name ;


END M2Reserved.
