C++ code generation: is it possible to put struct declaration in a namespace?

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fraben 2022-9-29

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https://ww2.mathworks.cn/matlabcentral/answers/1814310-c-code-generation-is-it-possible-to-put-struct-declaration-in-a-namespace

评论： Daniel Paukner 2024-8-9，20:16

Hello,

I am generating C++ code using Embedded Coder in v2021b. I am able to put the generated class in my chosen namespace via the Code Interface dialog:

But in my model i am using various buses, which are translated in C++ structs, which in turn reside in the global namespace.

Is there a way to specify a namespace for these structs too?

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Answer 1

Yoga 2023-9-10

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https://ww2.mathworks.cn/matlabcentral/answers/1814310-c-code-generation-is-it-possible-to-put-struct-declaration-in-a-namespace#answer_1306536

Hi @fraben!

I understand that you want to specify a namespace for structs that result out of the various buses you use in the model. This is possible by interactively configuring the C++ resultant code.

Please refer to the following link - https://www.mathworks.com/help/ecoder/ug/interactively-configure-cpp-interface.html.

I hope this helps resolve your issue.

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fraben 2023-9-13

Hello Yoga,

Thanks for your answer! I skimmed through the page you linked, but it seems to be only possible to wrap the model's class in a namespace.

I already did that, but from what i understand i can't control the namespace which will contain the structs corresponding to the buses entering/exiting the model: they, indeed, reside in the global namespace.

Daniel Paukner 2024-8-9，20:16

I have a similar problem.

I define a class namespace using the interactive method stated on the site mentioned by Yoga, and it is used for the generated code of the model class.

But i also define input & output busses, and in those, i reference external enum definitions. I converted the enums from my C++ header using simulink.importExternalCTypes() and the enums work when i test my model in simulink. But when i code the model, the bus definitions get written into codermodel_types.h and are not nested within the namespace of the parent model. My external enum definition did however specify the enums in a namespace for name collision reasons.

When i add the line "using namespace <mynamespace>" in codermodel_types.h, it compiles without a hitch, but i need to manually add that. How do i get simulink embedded coder to add that line for me, or even better, drop ALL the code it creates into the namespace i give it?

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