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[Octave-bug-tracker] [bug #44498] isvector: Always returns true for obje


From: Oliver Heimlich
Subject: [Octave-bug-tracker] [bug #44498] isvector: Always returns true for objects from user defined classes
Date: Tue, 10 Mar 2015 06:58:07 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Iceweasel/31.5.0

URL:
  <http://savannah.gnu.org/bugs/?44498>

                 Summary: isvector: Always returns true for objects from user
defined classes
                 Project: GNU Octave
            Submitted by: oheim
            Submitted on: Di 10 Mär 2015 07:58:06 CET
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: Oliver Heimlich
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0-rc1
        Operating System: Any

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Details:

The function isvector always returns true for user defined objects (whose
builtin size is [1 1]). However, the user defined class may have overridden
the size method.

See bug #43925 for a similar regression with isscalar and bug #44334 for a
similar regression with iseuqal. In GNU Octave 3.8.2 the overriden size had
been respected by isscalar, isvector, and isequal.

What is the desired behaviour?
1) A user-defined class must override all methods together to get a consistent
behaviour: size, isvector, isscalar, and isequal. Any builtin functions will
assume that the object's size is always [1 1].
2) A user-defined class must override size only. The builtin functions will
respect the overriden size method and produce a consistent behaviour for the
user (like they did in version 3.8.2).




    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?44498>

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