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How to implement function hints in your code

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I have seen that this has been asked previously, but never answered, and I want to know if this should go in as a feature request or if the capability is just not obvious.
When one starts typing e.g. 'plot(' and then waits, a series of suggested completions pops up. If I try this on my own code, it simply bases the suggestion on the top line. An abstract MWE example:
function out = foo(in, varargin)
p = inputParser;
out = in*p.Results.mult;
The function hint for this is 'foo(in,...)'.
Now, if I have a large number of possible inputs (similar to plot), I instead want the function hint to display some custom combinations of possible inputs as opposed to the single line based on the function definition. Preferably this would be based directly off of the comment header in the function file, although I could see it using an external file as well. This would be extremely helpful for building toolkits for other users.
Is this now possible? If not, I will submit it as a feature request.
Cheers, -Dan
  1 Comment
Rik on 1 May 2017
This is indeed an interesting question. (this comment is mostly to get in on my watch list)

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Accepted Answer

Kevin Gleason
Kevin Gleason on 4 May 2017
As of MATLAB R2017a, this feature is not available.
I have submitted a feature request on your behalf. The development team is aware of the issue and may consider adding it in a future release.

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