Publishing multiple data at a time - c++

Question

I have a header file which has a list of macros in the following format #define <name_of_error> <word>,<bit> "<name_of_error>
Following is a part of the header file -
#define CAMERA_ERROR 0,0, "CAMERA_ERROR"
#define IMAGE_NOT_DISPLAYING 0,1, "IMAGE_NOT_DISPLAYING"
#define CHANGE_IMAGE_CONSISTENCY 1,2, "CHANGE_IMAGE_CONSISTENCY"
Now I have a cpp source file where I have created a function pubError and pass header file information as arguments -
void pubError(int word, int bit, string name_of_error)
{
// Body of the function
}
I have a callback function and I try to call the function pubError from within it (and passing name_of_error) like following -
void sensorCallback(const diagnostic_msgs::DiagnosticArrayPtr &msg)
{
msg->status[0].level == diagnostic_msgs::DiagnosticStatus::ERROR
this->sc_.pubError(CAMERA_ERROR);
}
In this way I am able to publish only 1 error at a particular time. How can I publish multiple errors from the header file through the function pubError?

Answer 1

There are multiple ways to approach this. Assuming you don't want to change your #defines, you could change your pubError function as follows:
struct Error { int e1; int e2; std::string error; };
void pubError(std::vector<Error> errors)
{
for (auto e : errors) std::cout << e.error.c_str() << std::endl;
}
You could then invoke it as such:
#define CAMERA_ERROR 0,0, "CAMERA_ERROR"
#define IMAGE_NOT_DISPLAYING 0,1, "IMAGE_NOT_DISPLAYING"
#define CHANGE_IMAGE_CONSISTENCY 1,2, "CHANGE_IMAGE_CONSISTENCY"
pubError({ { CAMERA_ERROR }, { IMAGE_NOT_DISPLAYING } });