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(* M2Pass.mod provides setting and testing of the current pass.
Copyright (C) 2001-2023 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/>. *)
IMPLEMENTATION MODULE M2Pass ;
FROM M2Error IMPORT InternalError ;
TYPE
Pass = (NoPass, Pass0, Pass1, Pass2, PassC, Pass3, CodeGeneration, ErrorPass, HiddenPass) ;
VAR
CurrentPass: Pass ;
(*
SetPassToNoPass - sets the pass state to no Pass.
*)
PROCEDURE SetPassToNoPass ;
BEGIN
CurrentPass := NoPass
END SetPassToNoPass ;
(*
SetPassToPass0 - sets the pass state to Pass 0.
*)
PROCEDURE SetPassToPass0 ;
BEGIN
IF CurrentPass=NoPass
THEN
CurrentPass := Pass0
ELSE
InternalError ('attempting to set CurrentPass to Pass1')
END
END SetPassToPass0 ;
(*
SetPassToPass1 - sets the pass state to Pass 1.
*)
PROCEDURE SetPassToPass1 ;
BEGIN
IF CurrentPass=NoPass
THEN
CurrentPass := Pass1
ELSE
InternalError ('attempting to set CurrentPass to Pass1')
END
END SetPassToPass1 ;
(*
SetPassToPass2 - sets the pass state to Pass 2.
*)
PROCEDURE SetPassToPass2 ;
BEGIN
IF CurrentPass=NoPass
THEN
CurrentPass := Pass2
ELSE
InternalError ('attempting to set CurrentPass to Pass2')
END
END SetPassToPass2 ;
(*
SetPassToPassC - sets the pass state to Pass C.
*)
PROCEDURE SetPassToPassC ;
BEGIN
IF CurrentPass=NoPass
THEN
CurrentPass := PassC
ELSE
InternalError ('attempting to set CurrentPass to PassC')
END
END SetPassToPassC ;
(*
SetPassToPass3 - sets the pass state to Pass 3.
*)
PROCEDURE SetPassToPass3 ;
BEGIN
IF CurrentPass=NoPass
THEN
CurrentPass := Pass3
ELSE
InternalError ('attempting to set CurrentPass to Pass3')
END
END SetPassToPass3 ;
(*
SetPassToErrorPass - sets the pass state to no Error Pass.
*)
PROCEDURE SetPassToErrorPass ;
BEGIN
CurrentPass := ErrorPass
END SetPassToErrorPass ;
(*
SetPassToPassHidden - sets the pass state to the hidden type pass.
*)
PROCEDURE SetPassToPassHidden ;
BEGIN
CurrentPass := HiddenPass
END SetPassToPassHidden ;
(*
SetPassToCodeGeneration - sets the pass state to CodeGeneration.
*)
PROCEDURE SetPassToCodeGeneration ;
BEGIN
IF CurrentPass=NoPass
THEN
CurrentPass := CodeGeneration
ELSE
InternalError ('attempting to set CurrentPass to CodeGeneration')
END
END SetPassToCodeGeneration ;
(*
IsNoPass - returns true if currently in no Pass.
*)
PROCEDURE IsNoPass () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=NoPass )
END IsNoPass ;
(*
IsPass0 - returns true if currently in Pass 0.
*)
PROCEDURE IsPass0 () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=Pass0 )
END IsPass0 ;
(*
IsPass1 - returns true if currently in Pass 1.
*)
PROCEDURE IsPass1 () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=Pass1 )
END IsPass1 ;
(*
IsPass2 - returns true if currently in Pass 2.
*)
PROCEDURE IsPass2 () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=Pass2 )
END IsPass2 ;
(*
IsPassC - returns true if currently in Pass C.
*)
PROCEDURE IsPassC () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=PassC )
END IsPassC ;
(*
IsPass3 - returns true if currently in Pass 3.
*)
PROCEDURE IsPass3 () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=Pass3 )
END IsPass3 ;
(*
IsPassCodeGeneration - returns true if currently in the CodeGeneration Pass.
*)
PROCEDURE IsPassCodeGeneration () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=CodeGeneration )
END IsPassCodeGeneration ;
(*
IsPassHidden - returns TRUE if currently parsing for hidden types.
*)
PROCEDURE IsPassHidden () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=HiddenPass )
END IsPassHidden ;
(*
IsErrorPass - returns true if currently in the Error Pass.
*)
PROCEDURE IsErrorPass () : BOOLEAN ;
BEGIN
RETURN( CurrentPass=ErrorPass )
END IsErrorPass ;
BEGIN
SetPassToNoPass
END M2Pass.
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