[Octave-bug-tracker] [bug #53911] Comparing handle classes using == fails

[Richard]

URL:
  <http://savannah.gnu.org/bugs/?53911>

                 Summary: Comparing handle classes using == fails 
                 Project: GNU Octave
            Submitted by: crobar
            Submitted on: Tue 15 May 2018 02:13:18 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: Richard Crozier
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.0
        Operating System: Any

    _______________________________________________________

Details:

In matlab you can compare two handle class object to determine if the are
actually the same instance, e.g. in Matlab:


>> addpath
('/home/rcrozier/src/mfiles/mcode-hg/octave_test/test_comparing_handle_classes_using_eq')
>> x = compare1 ()

x = 

  compare1 with properties:

    foo: 1.0000e+000

>> y = x

y = 

  compare1 with properties:

    foo: 1.0000e+000

>> z = compare1

z = 

  compare1 with properties:

    foo: 1.0000e+000

>> x == y

ans =

  logical

   1

>> x == z

ans =

  logical

   0


In Octave this is not possible:


>> x = compare1 ()
x =

<object compare1>

>> y = x
y =

<object compare1>

>> z = compare1
z =

<object compare1>

>> x == y
error: eq method not defined for compare1 class
>>


Is there any workaround to determine if two handle objects are actually the
same?



    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: Tue 15 May 2018 02:13:18 PM UTC  Name: compare1.m  Size: 98B   By:
crobar

<http://savannah.gnu.org/bugs/download.php?file_id=44161>

    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?53911>

_______________________________________________
  Message sent via Savannah
  https://savannah.gnu.org/