don't return a return value that is really an error code

Hi! I'm wrapping a library where most of the functions follow the convention of returning an error code or 0 if no error. I've followed swig instructions to write an exception handler:

%exception {
    $action
    if (result != 0) {
        PyErr_SetString(PyExc_RuntimeError, "an error has occurred"); // will replace with something more descriptive
        SWIG_fail;
    }
}

Since errors are now translated into python exceptions,  I think if the function does succeed, I'd like to not return the error code 0. Many of the functions return via a parameter, and I think writing

result = foo(arg)

would be cleaner than having to write

_, result = foo(arg)

all over the place.

How can I tell swig that the error code should not be return the error code?

Best wishes,

Aidan Montare (she/her)
Time Realization and Distribution Group
Time and Frequency Division
NIST Boulder

_______________________________________________
Swig-user mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/swig-user