Extract function/code from MATLAB to c++

I'm using MATLAB to improve/code algorithms. I want to extract some parts , like filters in C++ or library to use on production project.

By example :

classdef FilterXXX < handle
    
    properties (Access = private)
       ...
    end
    
    properties (Access = private, Constant = true)
       ...
    end
    
    methods
        function obj = XXX(A,B)
            % Constructor
           
        end
        
        function A = YYY
            .....
        end
    end

Here, i want to extract the function A = YYY which is a algorithm or almost the entire class. I try to use MATLAB Coder, but seems i cant give a class to improve the conversion. The entrypoint need to be a function.To perform this action of converting MATLAB Code on libraries/C++. Do I need to make any changes to my code, for example this class in a function I would create to use MATLAB Coder or am I missing something

Answer 1

[Ryan Livingston]

A workaround for this case is to use a wrapper function

function A = FilterXXXWrapper(in1,in2,in3,in4)
% Construct your object
obj = FilterXXX(in1,in2);

% Use your object to do the desired computations
A = obj.YYY(in3,in4);
end

If you need to accumulate state in your object across multiple calls then store it in a persistent variable in your entry-point function

function A = FilterXXXWrapper(in1,in2,in3,in4)
persistent obj;
if isempty(obj)
    % Construct your object
    obj = FilterXXX(in1,in2);
end

% Use your object to do the desired computations
A = obj.YYY(in3,in4);
end