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INOUT parameters [message #1070560]

Thu, 18 July 2013 08:08

Rabab Lembachar

Messages: 2
Registered: July 2013

Junior Member

Hello,

I am trying to write an OCL postcondition for a UML operation that has INOUT parameters.

How are INOUT parameters handled in OCL? How can I refer to the value of a parameter before the execution of the operation? The @pre operator can only be used with properties.

Thank you in advance,
Rabab

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Re: INOUT parameters [message #1070801 is a reply to message #1070560]

Thu, 18 July 2013 17:44

Ed Willink

Messages: 4226
Registered: July 2009

Senior Member

Hi

Handling INOUT poarameters is one sissue that has yet to aligned between
OCL and UML. My currenrt thinking is that the UML-aligned OCL return
needs to be a tuple of all out, return, inout parameters.

But that is largely irrelevant to your question.

I see no reason why @pre cannot be used with parameters, however it is
redundant, since the parameters are immutable.

Regards

Ed Willink

On 18/07/2013 12:48, Rabab Lembachar wrote:
> Hello,
>
> I am trying to write an OCL postcondition for a UML operation that has
> INOUT parameters.
>
> How are INOUT parameters handled in OCL? How can I refer to the value
> of a parameter before the execution of the operation? The @pre
> operator can only be used with properties.
>
> Thank you in advance,
> Rabab

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