CPP conversion of model_handler.c of mesh_chat example not working

[selvam]

Hi Nordic team,

Please guide to resolve the error .

While trying to convert the model_handler.c to model_handler.cpp the below deceleration shows multiple compilation errors

static struct bt_mesh_elem elements[] = {
BT_MESH_ELEM(
1,
BT_MESH_MODEL_LIST(
BT_MESH_MODEL_CFG_SRV,
BT_MESH_MODEL_HEALTH_SRV(&health_srv, &health_pub)),
BT_MESH_MODEL_LIST(BT_MESH_MODEL_HELLO_BLE_COMM(&chat))),
};

Compilation Errors Are:

expected primary-expression before 'struct'
in definition of macro 'ARRAY_SIZE'
in expansion of macro 'BT_MESH_ELEM'
in expansion of macro 'BT_MESH_MODEL_LIST'
expected ')' before 'struct'
in definition of macro 'ARRAY_SIZE'
in expansion of macro 'BT_MESH_ELEM'
in expansion of macro 'BT_MESH_MODEL_LIST'
expected primary-expression before 'struct'
in definition of macro 'ARRAY_SIZE'
in expansion of macro 'BT_MESH_ELEM'
in expansion of macro 'BT_MESH_MODEL_LIST'
expected ')' before 'struct'
in definition of macro 'ARRAY_SIZE'
in expansion of macro 'BT_MESH_ELEM'
in expansion of macro 'BT_MESH_MODEL_LIST'
mesh.h


expected primary-expression before 'struct'
in definition of macro 'BT_MESH_ELEM'
in expansion of macro 'BT_MESH_MODEL_LIST'
expected ')' before 'struct'
in definition of macro 'BT_MESH_ELEM'
in expansion of macro 'BT_MESH_MODEL_LIST'

Location of Error showed at model.h : #define BT_MESH_MODEL_LIST(...) ((struct bt_mesh_model[]){ __VA_ARGS__ })

Thanks

Selvam

[Kenneth]

Sorry, but we don't have any experience with this. I would think you can keep a combination of .c and .cpp in your project, so not sure why you want to "convert" it to .cpp.

Kenneth

[selvam]

Hi Kennetrh,

Thanks for the response.

Actually we needs to have application layer files in CPP. as below.

So that we planned to have convert model_handler.c to model_handler.cpp.

But unfortunately we are getting compilation on compiling  the below structure array definitions.

static struct bt_mesh_elem HelloBleElements[] = {

          BT_MESH_ELEM(

                  1,

                  BT_MESH_MODEL_LIST(

                          BT_MESH_MODEL_CFG_SRV,

                          BT_MESH_MODEL_HEALTH_SRV(&HealthSrv, &HealthPub)),

                  BT_MESH_MODEL_LIST(BT_MESH_MODEL_HELLO_BLE_COMM(&HelloBle))),

  };

 

 

static struct Button Buttons[4] = {

                [0 ... 3] = { .Client = BT_MESH_ONOFF_CLI_INIT(&StatusHandler) },

};

Is that any possible way to resolve compilation error?

[Patrick]

In my experience using C++ with the nrf SDK, a large number of compilation issues are caused by out of order or incomplete initialization of structs by the SDK macros. I tend to initialize any structs created by macros without the macro itself.

[selvam]

Hi Patrick,

Thanks for the response. 

We will try to initialize struct without SDK macro.

Thanks

Selvam