Do mex functions support keyword assignment syntax?

One may call a native matlab function using any of the following syntaxes:

imwrite(img, fpath, 'Alpha', alpha);  % key-value pair using char as key
imwrite(img, fpath, "Alpha", alpha);  % key-value pair using string as key
imwrite(img, fpath, Alpha=alpha);  % keyword assignment

Do mex files support the keyword assignment syntax? If so, what is the expected type when receiving the data in the matlab::ArgumentList input object (string, char, struct, something else...)?

Answer 1

[Stephen23]

A few simple experiments show that key=value assignment is converted by the parser into 'key',value. I don't see why it would be any different when calling mex files, as this is something that the parser does all by itself, before anything happens with the function itself.

[Walter Roberson]

In a discussion not long ago, Mathworks says that at present the called function cannot tell which syntax the options were specified with; https://blogs.mathworks.com/matlab/?p=1005#reply_2532411