Re: Some OOP questions

[CdeMills]

Judd Storrs-2 wrote
> 
> 
> @wrapper/foo.m:
> function w = foo(w, varargin)
>     w.data = foo(w.data, varargin{:});
> endfunction
> 
> Is there a different way to handle that? Maybe something like a
> generic "missing method" handler for the class?
> 
> 

In the case of dataframes, I solved the problem like this

@wrapper/foo.m:
function resu = foo(A, B, varargin)
try 
  resu = wrapper_func(@plus, A, B, varargin{:});
  catch
    disp(lasterr());
    error("Operator foo problem for %s vs. %s", class(A), class(B));
  end_try_catch
end

@wrapper/private/wrapper_func
function resu = wrapper_func(func, A, B, varargin{:})
if (isa(A, 'wrapper'))
  if isa(B, 'wrapper'))
     resu = feval(func, A.data, B.data, varargin{:});
  else
    resu = feval(func, A. data, B, varargin{:});
  
and so on. This way, only private/wrapper_func has to care if arguments are
or not of class wrapper. All overloaded functions only differ in the name
they're transmitting to wrapper_func. Some genericity should be good, but
it's doable without it.

Regards

Pascal

--
View this message in context: 
http://octave.1599824.n4.nabble.com/Some-OOP-questions-tp4373321p4374312.html
Sent from the Octave - General mailing list archive at Nabble.com.