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Re: Stop on message?

• To: mathgroup at smc.vnet.net
• Subject: [mg126680] Re: Stop on message?
• From: Christoph Lhotka <christoph.lhotka at fundp.ac.be>
• Date: Wed, 30 May 2012 04:13:30 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201205260911.FAA07083@smc.vnet.net> <jpspa5$hb9$1@smc.vnet.net> <201205290947.FAA06698@smc.vnet.net>

Hi,

  in my opinion messages in Mathematica are generated during the 
evaluation process to give
some kind of "meta"-information about 1) what is going wrong or 2) what 
you need to know
to check by yourself to know of the returned result is correct.

I would like to compare this information with the concepts of "errors" 
and "warnings" produced
by a compiler during the process to produce a program.

Seeing "Mathematica messages" in this flavour any input which produces a 
message should be
seen as wrong or not working properly and therefore be modified as long 
as there are no
messages left at all.

I therefore do not see a reason yet why I should use messages outside 
the development
phase of a project.

Can you provide me with one?

Thanks,

Christoph




On 05/29/2012 11:47 AM, Szabolcs Horvát wrote:
> There were two replies suggesting to use Check[] to abort evaluation
> when a message is generated.
>
> Note that while Check does return a different result if a message was
> generated, it does not actually interrupt evaluation (it completed the
> evaluation of 'expr').
>
> See here for an example:
>
> http://mathematica.stackexchange.com/questions/5534/check-does-not-interrupt-evaluation-of-the-expression-when-a-message-is-emitted
>
> Please see here for a method that will reliably abort immediately when a
> message is generated.
>
> http://mathematica.stackexchange.com/questions/1512/how-to-abort-on-any-message-generated
>
> On 2012.05.27. 10:40, Sseziwa Mukasa wrote:
>> Check[expr,Return[]]
>>
>> On May 26, 2012, at 5:11 AM, Ralph Dratman<ralph.dratman at gmail.com>   wrote:
>>
>>> Hi,
>>>
>>> Is there a simple way to get Mathematica to stop evaluating (like
>>> Interrupt) whenever a message is issued?
>>>
>>> I realize the debugger has that feature, but I would prefer not to use
>>> it in this case.
>>>
>>> Thank you.
>>>
>>> Ralph Dratman
>>>
>

• References:
  • Stop on message?
    • From: Ralph Dratman <ralph.dratman@gmail.com>
  • Re: Stop on message?
    • From: Szabolcs Horvát <szhorvat@gmail.com>