bugGNU Octave - Bugs: bug #44665, Cannot create object array using...

 
 

bug #44665: Cannot create object array using bracket syntax

Submitter:  -X- <jsh>
Submitted:  Mon 30 Mar 2015 06:40:35 AM UTC
   
 
Category:  Classdef Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Feature Request
Status:  Confirmed Assigned to:  None
Originator Name:  Open/Closed:  * Open
Release:  * dev Operating System:  * Any
Fixed Release:  None Planned Release:  None
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Tue 30 Jan 2024 10:09:46 PM UTC, comment #4: 

This is related to bug #65179 and the creation of arrays of classdef objects.  Making this report dependent on bug #65179.

Rik <rik5>
Group administrator
Sun 07 Jun 2020 10:21:21 AM UTC, comment #3: 

This still isn't supported on current dev:

> a = [foo; foo];
warning: struct: converting a classdef object into a struct overrides the access restrictions defined for properties. All properties are returned, including private and protected ones.
error: invalid conversion of multi-dimensional struct to scalar struct


Markus M├╝tzel <mmuetzel>
Group administrator
Thu 21 Apr 2016 04:02:04 PM UTC, comment #2: 

The error message is now:


warning: struct: converting a classdef object into a struct overrides the access restrictions defined for properties. All properties are returned, including private and protected ones.
warning: struct: converting a classdef object into a struct overrides the access restrictions defined for properties. All properties are returned, including private and protected ones.
error: octave_base_value::parent_class_name_list(): wrong type argument 'object'


A way around is:


a(1) = foo();
a(2) = foo()
a =

<object array foo>


Guillaume <gyom>
Tue 02 Jun 2015 04:43:24 PM UTC, comment #1: 

Retagging release from 4.0.0-rc2 to 4.0.0.

John W. Eaton <jwe>
Group administrator
Mon 30 Mar 2015 06:40:35 AM UTC, original submission:  

Concatenation of classdef objects fail with the error messages:

error: invalid conversion of multi-dimensional struct to scalar struct
error: octave_base_value::parent_class_name_list(): wrong type argument 'object'

It seems at least one part of the problem are the '__parent_classes__' and 'parent_class_names' functions which do not seem to support classdef objects.

To test, create a class, for example:


classdef foo
  properties
    bar = 1;
  end
end


and try to concatenate some instances:


a = foo();
[ a a ]
__parent_classes__(a)


If this isn't supported yet maybe a better error message should be printed instead.

-X- <jsh>

 

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    Follow 10 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2024-01-30 rik5 Summaryerror in concatenation of classdef objects Cannot create object array using bracket syntax
        Dependencies- Depends on bugs #65179
    2024-01-23 mmuetzel CategoryInterpreter Classdef
    2024-01-18 rik5 Dependencies- bugs #56323 is dependent
    2020-06-07 mmuetzel Item GroupNone Feature Request
        StatusNone Confirmed
        Release4.0.0 dev
    2019-05-09 siko1056 Dependencies- bugs #53906 is dependent
    2016-12-09 amro_octave Carbon-Copy- Added amro_octave
    2015-06-02 jwe Release4.0.0-rc2 4.0.0

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