MATLAB: How to check if output argument is ignored

Question

Is is possible to check if a function gets called with to-be-ignored output arguments (using ~)?

function [Y1, Y2] = MyFunction(...)
% common code for Y1 and Y2 here
if //insert_check_here//
   % avoid this code when called as [~, B] = MyFunction (...)
end

For all these situations below, however, nargout returns 2, so that function seems to have no use in solving my problem.

[~,b] = myFunction
[a,~] = myFunction
[~,~] = myFunction % you may think about the usefulness of this call :)

Thanks! ~ Jos

Answer 1

No, it is currently not possible without writing some hack with dbstack and parsing the calling file. See also:

https://www.mathworks.com/matlabcentral/answers/184617-how-to-detect-in-output-argument-list-so-as-to-avoid-memory-allocation-inside-called-function

https://www.mathworks.com/matlabcentral/answers/142733-equivalent-of-inputname-for-output-variables