Re: Need test for handles to classdef methods run in Matlab

[John W. Eaton]

On 3/23/19 5:31 AM, PhilipNienhuis wrote:

> Matlab r2019a prerelease:
>
> > > format compact
> > > obj = mycls ();

> > > fh = @obj.meth;
> > > fh(2)
> meth
> varargin =
>    1×2 cell array
>      {1×1 mycls}    {[2]}

> > > fh = @obj.smeth;
> > > fh (2)
> smeth
> varargin =
>    1×1 cell array
>      {[2]}

Thanks.

Now I need to know one more thing.  In expressions like the ones shown 
above, is the value of obj captured when the function handle is created, 
or is it just a name that is used for lookup later?  To test that, maybe 
the following will give some clue.  If you define the additional function

  function [fh1, fh2] = foo ()
    obj = mycls ();
    fh1 = @obj.meth;
    fh2 = @obj.smeth;
  end

and then execute

  clear all
  [fh1, fh2] = foo ();
  fh1 (1)
  fh2 (2)

what happens?  Another test:

  clear all
  obj = mycls ();
  fh1 = @obj.meth;
  fh2 = @obj.smeth;
  clear obj
  fh1 (1)
  fh2 (2)

Could someone run these tests in a recent version of Matlab and report 
the results here?  I'm attaching mycls.m and foo.m to this message.

jwe

foo.m
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mycls.m
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