bugGNU Octave - Bugs: bug #48693, classdef subsref method is not...


bug #48693: classdef subsref method is not called with correct nargout value

Submitted by:  Mike Miller <mtmiller>
Submitted on:  Wed 03 Aug 2016 10:02:56 PM UTC  
Category:  Interpreter Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Matlab Compatibility
Status:  None Assigned to:  None
Originator Name:  Open/Closed:  Open
Release:  dev Operating System:  Any

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Wed 03 Aug 2016 10:02:56 PM UTC, original submission:

In a classdef handle class, the subsref method is supposed to be called with `nargout` set to the number of values that the indexing argument addresses.

This works for old-style struct-based classes, but not for classdef classes.

Given the following constructor

and the following simple definition of subsref

Then the following only returns a single value, even though the indexing operation is over a range of 10 values, and nargout should be set accordingly to capture 10 values:

but, assigning to the right number of output values gets the correct output

If foo is changed to be a struct-based class with the following constructor, but the subsref method is left exactly the same,

then nargout is set correctly and the indexing examples work as expected.

This is a difference in how subsref is implemented in the octave_class vs octave_classdef classes.

Mike Miller <mtmiller>
Project Administrator


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