How to input dependent parameters in matlab function?

I encountered such an input parameter dependency problem in my project. How can I solve it in an elegant way through "arguments"?

function out = myfun(A,B,optionC,dependent_C1,dependent_C2,...)
    arguments
        % If I enter optionC, one of dependent_C1 and dependent_C2 must be entered; otherwise, if optionC is not entered, neither dependent_C1, dependent_C2 can be entered
    end
end
    

The syntax format is:

out = myfun(A,B)

out = myfun(A,B,optionC,dependent_C1)

out = myfun(A,B,optionC,dependent_C2)

The impossible formats are:

out = myfun(A,B,optionC)

out = myfun(A,B,optionC,dependent_C1,dependent_C2)

--------------------

similar question:

How to set mutually exclusive arguments in matlab?

Answer 1

[Matt J]

These two,

out = myfun(A,B,optionC,dependent_C1) 
out = myfun(A,B,optionC,dependent_C2) 

are not possible simultaneously. If you want an argument to be non-positional, it must be entered as a Name-Value pair. The way to do approximately what you want is to support the following syntaxes, with the rule that dependent_C1 and dependent_C2 cannot both be empty,

out = myfun(A,B,optionC,dependent_C1) 
out = myfun(A,B,optionC,dependent_C1,[]) 
out = myfun(A,B,optionC,[],dependent_C2) 
out = myfun(A,B,optionC,dependent_C1,dependent_C2) 

To handle the above, my approach would be as below. I don't think the arguments block can achieve something simpler.

function out = myfun(A,B,varargin)
    arguments
       A ...
       B ...
    end

   if nargin>=3
      varargin(end+1:5)={[]};
      [optionC,dependent_C1,dependent_C2]=deal(varargin{3:5});
      assert( ~isempty(dependent_C1) || ~isempty(dependent_C2), 'Bad argument combination')
   end
    

end

[xingxingcui]

thanks,I think the best design method（Name-Value pair） should be:

function out = myfun(A,B,options)
    arguments
        A ...
        B ...
        options.name (1,1) string {mustBeMember(options.name,["dependent_C1","dependent_C2"])} = "dependent_C1"
    end
end

The syntax format is:

out = myfun(A,B)

out = myfun(A,B,'name',dependent_C1)

out = myfun(A,B,'name',dependent_C2)