[Octave-bug-tracker] [bug #50640] display function not passing arguments to overloaded version of function

[Markus Mützel]

Follow-up Comment #22, bug #50640 (project octave):

Guillaume, which version of Matlab are you using. I am seeing different
results on Matlab R2016a.

classdef class1

  methods
function display (a1)
  nargin
  class (a1)
  inputname (1)
  disp (a1)
end
  end
end



classdef class2

  methods
function display (a1, a2)
  nargin
  class (a1)
  inputname (1)
  disp (a1)
  class (a2)
  inputname (2)
  disp (a2)
end
  end
end


Here the results:

>> class1()

ans =

     1


ans =

class1


ans =

ans

  class1 with no properties.

>> c1=class1()

ans =

     1


ans =

class1


ans =

c1

  class1 with no properties.

>> class2()

ans =

     2


ans =

class2


ans =

ans

  class2 with no properties.


ans =

char


ans =

     1


ans =

class2


ans =

ans

  class2 with no properties.

Not enough input arguments.

Error in class2/display (line 9)
  class (a2)
 
>> c2=class2()

ans =

     2


ans =

class2


ans =

c2

  class2 with no properties.


ans =

char


ans =

     1


ans =

class2


ans =

c2

  class2 with no properties.

Not enough input arguments.

Error in class2/display (line 9)
  class (a2)


Calling "class2" without output argument calls display with one input argument
which fails.
I expected calling "class2" with output argument to succeed. However, it fails
on "disp(a2)" which in turn calls display with one input argument hence
failing.

Btw: Matlab's internal editor warns with: "Overloading DISPLAY is not
recommended." and advises to overload "disp" instead.

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