Catch Exceptions in MEX Function
To override the default error behavior, you can catch exceptions thrown in MEX functions when calling MATLAB® functions.
This code causes MATLAB to throw an exception because it defines the input argument incorrectly
for the MATLAB
sqrt
function. The catch block handles the
matlab::engine::MATLABException
by displaying the string
describing the exception in the MATLAB command window.
ArrayFactory factory;
std::shared_ptr<matlab::engine::MATLABEngine> matlabPtr = getEngine();
// Variable with no value causes error
std::vector<matlab::data::Array> arg;
try {
matlab::data::Array result =
matlabPtr->feval(u"sqrt", arg);
}
catch (const matlab::engine::MATLABException& ex) {
matlabPtr->feval(u"disp", 0, std::vector<Array>({factory.createScalar(ex.what()) }));
}