bugGNU Octave - Bugs: bug #56816, calling classdef methods with the...


bug #56816: calling classdef methods with the dot-syntax from an old-style method fails

Submitted by:  Sébastien Villemot <svillemot>
Submitted on:  Tue 27 Aug 2019 12:32:05 PM UTC  
Category:  Interpreter Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Unexpected Error or Warning
Status:  Confirmed Assigned to:  None
Originator Name:  Open/Closed:  Open
Release:  dev Operating System:  GNU/Linux

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Tue 27 Aug 2019 01:10:04 PM UTC, comment #1: 

Thank you for the report.

I just made sure, that it is no regression. Your example did not work in 4.2.2, 4.4.1, and 5.1.0 either.

To give a short overview:

├── @bar        # classdef
│   └── bar.m
├── @foo        # old style class
│   ├── foo.m
│   ├── meth1.m
│   └── meth2.m
└── runtest.m


function x = meth1(o)
  z = bar;
  x = meth(z);

function x = meth2(o)
  z = bar;
  x = z.meth;  # Error with or without assignment to x!


o = foo;
meth2(o); # Error

The error message:

>> runtest
error: class not found: foo
error: called from
    meth2 at line 3 column 5
    runtest at line 3 column 1

Kai Torben Ohlhus <siko1056>
Project Member
Tue 27 Aug 2019 12:32:05 PM UTC, original submission:  


Suppose we have two classes "foo" and "bar".

"foo" uses old-style classes, while "bar" uses classdef.

From the body of a method of "foo", calling a method of "bar" using the dot-syntax (i.e. bar.method()) triggers a weird error. However the functional syntax (method(bar)) works.

Note that MATLAB accepts both syntaxes in this context.

I attach a code example that demonstrates the problem.

Sébastien Villemot <svillemot>


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:

Attached Files
file #47399:  classdef-old-style-mix.tar.gz added by svillemot (407B - application/gzip)


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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-08-27 siko1056 StatusNone => Confirmed
    2019-08-27 svillemot Attached File- => Added classdef-old-style-mix.tar.gz, #47399

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