bugGNU Octave - Bugs: bug #30909, OO code failing under 3.3.52+


bug #30909: OO code failing under 3.3.52+

Submitter:  Pascal Dupuis <cdemills>
Submitted:  Mon 30 Aug 2010 04:22:23 PM UTC
Category:  Interpreter Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Incorrect Result
Status:  Fixed Assigned to:  highegg
Originator Name:  Pascal Dupuis Open/Closed:  * Closed
Release:  * dev Operating System:  * GNU/Linux
Fixed Release:  None Planned Release:  None
* Mandatory Fields

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Tue 31 Aug 2010 04:30:50 PM UTC, comment #2: 

The mentionned problem is gone. Thanks.


Pascal Dupuis <cdemills>
Group Member
Tue 31 Aug 2010 06:20:53 AM UTC, comment #1: 

Why do you think the assignment should go through subsasgn?
I think that a private class method should be able to access fields directly, just like non-private methods.

I checked in the following fix to address the problem:

If you think it should work otherwise, please clarify and support your opinion by quoting matlab docs or showing examples.

Jaroslav Hajek <highegg>
Mon 30 Aug 2010 04:22:23 PM UTC, original submission:  


while trying the latest code from mercurial, I've got a problem. The class constructor calls private/df_pad.m, which fails as follows:

function df = df_pad(df, dim, n, coltype=[])
  switch dim
    case 1
      %# complete row indexes
      if isempty(df._ridx),
dummy = (1:n).';
dummy = vertcat(df._ridx, repmat(NA, n, size(df._ridx, 2)));
      df._ridx = dummy; <= fails

the code is called with an empty dataframe, dim = 1, n = 10.

Error message is
malformed class
assignement failed, or no method for 'class=matrix'

In principle, the assignement must be performed through subasgn, which it itself busy calling df_pad. The code works under 3.2.4, is there some reason while it fails under 3.3.52 ? Should I play between classes and struct to handle directly modifications of the class variable ?

The problem can be reproduced as follows:
- install the dataframe package from octave-forge
- x=dataframe('octave_frame/data_test.csv');



Pascal Dupuis <cdemills>
Group Member


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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2010-08-31 highegg StatusNone Fixed
        Assigned toNone highegg
        Open/ClosedOpen Closed

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