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(* GeneralUserExceptions.mod implement the ISO GeneralUserExceptions.
Copyright (C) 2002-2023 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. *)
IMPLEMENTATION MODULE GeneralUserExceptions ;
FROM EXCEPTIONS IMPORT ExceptionSource, RAISE, AllocateSource, CurrentNumber,
IsCurrentSource, IsExceptionalExecution ;
FROM M2RTS IMPORT NoException ;
FROM SYSTEM IMPORT ADR ;
VAR
general: ExceptionSource ;
(*
RaiseGeneralException - raises exception using text as the associated
message.
*)
PROCEDURE RaiseGeneralException (exception: GeneralExceptions; text: ARRAY OF CHAR) ;
BEGIN
RAISE (general, ORD (exception), text)
END RaiseGeneralException ;
(*
IsGeneralException - returns TRUE if the current coroutine is in the
exceptional execution state because of the raising
of an exception from GeneralExceptions; otherwise
returns FALSE.
*)
PROCEDURE IsGeneralException () : BOOLEAN ;
BEGIN
RETURN IsExceptionalExecution () AND IsCurrentSource (general)
END IsGeneralException ;
(*
GeneralException - if the current coroutine is in the exceptional
execution state because of the raising of an
exception from GeneralExceptions, returns the
corresponding enumeration value, and otherwise
raises an exception.
*)
PROCEDURE GeneralException () : GeneralExceptions;
BEGIN
IF IsGeneralException ()
THEN
RETURN VAL (GeneralExceptions, CurrentNumber (general))
ELSE
NoException (ADR (__FILE__), __LINE__,
__COLUMN__, ADR (__FUNCTION__),
ADR ("not in the exceptional execution state"))
END
END GeneralException ;
BEGIN
AllocateSource (general)
END GeneralUserExceptions.
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