[Octave-bug-tracker] [bug #38128] Overloaded vercat() not called in some cases

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?38128>

                 Summary: Overloaded vercat() not called in some cases
                 Project: GNU Octave
            Submitted by: None
            Submitted on: dim. 20 janv. 2013 21:35:29 UTC
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Julien Bect
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

    _______________________________________________________

Details:

Let us consider a class @A, with the following constructor:


function x = A(xdata)
x.data = data;
x = class(x, 'A');
end


and the following overload vertcat function:


function z = vertcat(x, y)
z = A([double(x); double(y)]);
end


The following script illustrates the problem:


xdata = rand(5, 2);  x = A(xdata);
ydata = rand(5, 2);  y = A(ydata);
z4 = [x; ydata]  % err: vertical dimensions mismatch (1x1 vs 5x2)
z5 = [xdata; y]  % err: vertical dimensions mismatch (5x2 vs 1x1)
z6 = [x; y]      % this one works


It seems that the overloaded vertcat function is only called when both
arguments are class A objects.

I would expect it to be called as soon as one of the two arguments is of class
A (this is what happens, for instance, with an overloaded plus() function).

The problem has been observed in Octave 3.6.2 (Ubuntu 12.10 install) and
3.6.4-rc1 (built from branch stable, revision 7ad3eea8a3af).

Attachment: test script + @A class directory.




    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: dim. 20 janv. 2013 21:35:29 UTC  Name: octaveVertcatIssue.zip  Size: 2
ko   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=27305>

    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?38128>

_______________________________________________
  Message posté via/par Savannah
  http://savannah.gnu.org/