Why does tab completion not work for p-coded function arguments in MATLAB R2020b?

I am using an "arguments" block to define name-value arguments for a MATLAB function, "myRectangle":

function myRectangle(X,Y,options)
    arguments
       X double
       Y double
       options.LineStyle (1,1) string = "-" 
       options.LineWidth (1,1) {mustBeNumeric} = 1
    end
    % Function code
    ...
end

I got "myRectangle" from the "arguments" documentation page:

https://www.mathworks.com/help/releases/R2020b/matlab/ref/arguments.html#mw_c78db305-0136-4d4c-b880-f6615c757d8d

I can use tab completion to complete name-value arguments of "myRectangle" when the function is an M-file:

Alt text: The MATLAB command window while I am calling "myRectangle". The tab complete menu shows "LineStyle" and "LineWidth".

However, when "myRectangle" is a P file, MATLAB finds no completions:

Alt text: The MATLAB command window. The command window shows that "myRectangle" is p-coded, and the tab completion menu shows "No completions found."

How can I modify my P file so that I can use tab completion on its arguments?

Answer 1

[MathWorks Support Team]

Recommended Workaround

As of MATLAB R2022b, MATLAB can tab-complete arguments for p-coded functions. Upgrade your MATLAB to the R2022b release to enable this enhancement for your workflow.

Alternative Workaround

If you do not wish to upgrade, you can use wrapper M-files as an alternative workaround in MATLAB R2020b. For example, say that you p-code the function "myRectangle" that you had earlier. Then you can write a wrapper function, "myRectangleWrapper":

function myRectangleWrapper(X,Y,options)
    arguments
       X double
       Y double
       options.LineStyle (1,1) string = "-" 
       options.LineWidth (1,1) {mustBeNumeric} = 1
    end
    % Call the p-coded function with the inputs
    myRectangle(X, Y, "LineStyle", options.LineStyle, ...
                      "LineWidth", options.LineWidth);
end

Then, if you enter the text

>> myRectangleWrapper(1, 1, "Line

at the MATLAB command window, you will be able to find "LineWidth" and "LineStyle" when you press tab.