Re: Expected behavior for variables which shadow function names

[Ben Abbott]

On Mar 7, 2013, at 2:13 PM, John W. Eaton wrote:

> On 03/07/2013 02:04 PM, Rik wrote:
> 
>> I would definitely prefer that.  Can someone verify on a recent version of
>> Matlab how this behaves?  If they have upgraded their behavior then we can 
>> too.
> 
> Some things to test:
> 
>  function f (jet)
>    jet
>  end
> 
>  function f (jet)
>    if (nargin == 0)
>      jet
>    elseif (nargin == 1)
>      x = jet
>    end
>  end
> 
> call both with
> 
>  f (1)
>  f (0)
> 
> Another:
> 
>  function f ()
>    jet = 1;
>    clear jet
>    jet
>  end
> 
> Not that it would be very hard to fix, but I hope there isn't any code in 
> Octave that actually depends on the current behavior...
> 
> jwe

I ran some examples.  I assume you intended f(0) to be f([]) or f()?

 function foo1 (jet)
   jet
 end

 function foo2 (jet)
   if (nargin == 0)
     jet
   elseif (nargin == 1)
     x = jet
   end
 end

 function foo3 ()
   jet = 1;
   clear jet
   jet
 end

matlab> foo1 (1)

jet =

     1

matlab> foo1 ([])

jet =

     []

matlab> foo1 ()
Error using foo1 (line 2)
Not enough input arguments.

matlab> foo2 (1)

x =

     1

matlab> foo2 ([])

x =

     []

matlab> foo2 ()
Error using foo2 (line 3)
Not enough input arguments.

matlab> foo3 ()
Reference to a cleared variable jet.

Error in foo3 (line 4)
  jet
 

Ben