RE: own label for ASSERTS and error messages

From: [at]} <frei{>
Date: Sat, 16 Mar 2002 14:30:20 +0100

----boundary-LibPST-iamunique-1031368992_-_-
Content-type: text/plain

Andrew,

actually, it should be pretty easy to write a module StdErrors as you
sketched it. Just use Dialog.MapString to map a generic error string to
a user error message.

For ASSERTs you can show a plain-text description of the trap's cause,
by providing suitable resources in the subsystem's string resource file:
module name without subsystem prefix, followed by ".", followed by the
procedure name, followed by ".", followed by the trap number. Like in
the following example:
Math.Power.23 Pre: x # 1.0 OR ABS(y) # INF
If such a resource exists, the corresponding text is shown in the trap
display.
This new BlackBox service is documented in the Dev subsystem's user
manual.

Regards
Marc Frei
Oberon microsystems, Inc.


-----Original Message-----
From: Thomas, Andrew [mailto:andrew.thomas{([at]})nowhere.xy
Sent: Dienstag, 12. März 2002 14:57
To: 'blackbox{([at]})nowhere.xy
Subject: own label for ASSERTS and error messages


Hello Oberon Crew,

        the ability in v1.4 of BlackBox is nice. I wonder if something
similar could be done for user error messages?
Maybe


        MODULE Test;

                PROCEDURE Fred (OUT ok: BOOLEAN)
                VAR
                   errorNum: INTEGER;
                BEGIN
                        xxxx
                        if error then
                                errorNum := 1;
                                StdErrors.SetError(errorNum); ok :FALSE;
                                RETURN
                        end
                END Fred;

        END Test.

        
        DEFINITION StdErrors;

        VAR
                error-: ARRAY 240 OF CHAR;

                PROCEDURE SetError(errorNum: INTEGER);

        END StdErrors.

the procedure Fred would use StdErrors.SetError to set the error string
in
StdErrors to Test.Fred.1 which could then be mapped to a useful
user message.

Regards

        Andrew
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Received on Sat Mar 16 2002 - 14:30:20 UTC