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Problem with redeclare in partial classes

#9153  Permalink Top

Problem with redeclare in partial classes

May-23-19 12:40:32

Hi,

I am starting to use OpenModelica so I am trying to get all the information I can from the forums, but I am not able to solve my problem (very basic, I guess) at all.

I just want to run the simulation of the GTUnit from the ThermoPowerLibrary. Since it is a partial class, I run the simulation and I get the following errors:


[1] 14:27:33 Translation Error
[ThermoPower.Gas: 3270:5-3393:19]: Illegal to instantiate partial class GTunitBase.

[2] 14:27:33 Translation Error
Error occurred while flattening model GTUnitBase_prueba

[3] 14:32:20 Translation Error
[ThermoPower.Gas: 3281:7-3281:78]: Exhaust is partial, name lookup is not allowed in partial classes.

[4] 14:32:20 Translation Error
[ThermoPower.Gas: 3282:7-3282:71]: Air is partial, name lookup is not allowed in partial classes.

So OK, I know that I have to redeclare something, but what? I see that I cannot just rewrite the library file so I have duplicated the GTUnitBase inside my own model and then tried to include in some lines redeclare package Medium = Medium as I have seen in other topics, but a lot of errors appear as well.

Anyway, I cannot figure out how to solve this I would appreciate if someone can orient me on what I should include and where.

You can find attached my model.

Thanks!


GTUnitBase-prueba.mo

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#9154  Permalink Top

Re: Problem with redeclare in partial classes

May-23-19 13:11:08

Since GTunitBase is a partial model you can't declare components of that type, i.e. you can't instantiate it. What you need to do is extend the model, and redeclare the needed bits:

Code:


model MyGTunitBase

  extends ThermoPower.Gas.BaseClasses.GTunitBase(

    redeclare package Air = Some.Air.Medium,

    redeclare package Fuel = Some.Fuel.Medium,

    etc...

  );

end MyGTunitBase;

However, are you sure you want to use GTunitBase? You probably won't be able to use the model like this without additional setup. You might be better of using the GTunit model instead, which already does this. If you want to configure the mediums used in GTunit you can still extend from it like shown above, or you can create a GTunit component since GTunit isn't partial:

Code:


model SomeModel

  ThermoPower.Gas.GTunit gtUnit1(redeclare package Air = Some.Air.Medium, etc..);

end SomeModel;

You might also want to look at the models in ThermoPower.Test, which contains examples of how the models can be used.

Edited by: perost - May-23-19 13:14:12
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