[Oberon] Oberon for a C++ user.

[Skulski, Wojciech]

Chris:

  I wanted to create a possible example, so I downloaded LinzV4 from 
ftp://ftp.ssw.uni-linz.ac.at/pub/Oberon/Windows/win95-NT/. 
I unpacked according to instructions and the system traps on
Documents.Open Welcome.Text. I cannot copy-paste the trap because 
attempts of doing so cause the next traps.

It is surprising because I have a working LinzV4 on a Windows 7
computer at work. It runs OK under Windows 7 64 bit. But here at home it 
traps under Windows XP 32 bit.

I am not sure where I got the working LinzV4 copy from. Perhaps the one at Linz
is an old leftover? Any suggestions where to a working LinzV4? 

Wojtek
________________________________________
From: Oberon [oberon-bounces at lists.inf.ethz.ch] on behalf of Chris Burrows [chris at cfbsoftware.com]
Sent: Friday, September 30, 2016 8:29 PM
To: ETH Oberon and related systems
Subject: Re: [Oberon] Oberon for a C++ user.

Yes, of course it does - that is something completely different. 'trouble' has not yet been defined so it fails even though the module is still loaded. A simpler way of illustrating that particular problem in Component Pascal would be:

MODULE TempProcvar;

TYPE
  ParamProc = PROCEDURE ( p: INTEGER );

VAR
  trouble : ParamProc;

  PROCEDURE Run*;
  BEGIN
    trouble(99)
  END Run;

END TempProcvar.

Any example that illustrates the problem under discussion would have at least two modules.

>
> From: aubrey.mcintosh at gmail.com [mailto:aubrey.mcintosh at gmail.com] On
> Behalf Of Aubrey.McIntosh at alumni.utexas.net
> Sent: Saturday, 1 October 2016 9:36 AM
> To: chris at cfbsoftware.com; ETH Oberon and related systems
> Subject: Re: [Oberon] Oberon for a C++ user.
>
> This snipped compiles under Component Pascal 1.7-rc1, and traps with
> a nil procedure call.
>
> MODULE TempProcvar;
>
>       TYPE
>               ParamProc = PROCEDURE ( p: INTEGER );
>
>       VAR
>               trouble* : ParamProc;
>
>       PROCEDURE UseProc ( method: ParamProc );
>       BEGIN
>               method( 42 )
>       END UseProc;
>
>       PROCEDURE Doit*;
>       BEGIN
>               UseProc (  trouble )
>       END Doit;
>
> END TempProcvar.
>
>
>
> On Fri, Sep 30, 2016 at 6:11 PM, Chris Burrows
> <chris at cfbsoftware.com> wrote:
> > -----Original Message-----
> > From: Oberon [mailto:oberon-bounces at lists.inf.ethz.ch] On Behalf Of
> > St phane Aulery
> > Sent: Friday, 30 September 2016 6:19 AM
> > To: ETH Oberon and related systems
> > Subject: Re: [Oberon] Oberon for a C++ user.
> >
>
> I'd like to see actual example code that illustrates the problem as I
> am not convinced it is a problem - at least not with the latest
> version of Oberon.


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