[Octave-bug-tracker] [bug #63104] exist and which fail to query +package functions (such as containers.Map)

[Qianqian Fang]

URL:
  <https://savannah.gnu.org/bugs/?63104>

                 Summary: exist and which fail to query +package functions
(such as containers.Map)
                 Project: GNU Octave
               Submitter: fangq
               Submitted: Sun 25 Sep 2022 04:37:34 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Qianqian Fang
        Originator Email: 
             Open/Closed: Open
                 Release: 6.4.0
         Discussion Lock: Any
        Operating System: GNU/Linux


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Follow-up Comments:


-------------------------------------------------------
Date: Sun 25 Sep 2022 04:37:34 PM UTC By: Qianqian Fang <fangq>
-------
Summary:

functions stored in a package namespace (+package folder) can not be queried
using exist() or which().

This can be reproduced on Octave 5.2 and 6.4. (did not test for 7.x or dev)


-------
Expected result (as in MATLAB):

>> exist('containers.Map')
ans =
     8
>> which containers.Map
containers.Map is a built-in method  % containers.Map constructor
>> which matlab.lang.makeUniqueStrings
/.../MATLAB/R2020a/toolbox/matlab/lang/+matlab/+lang/makeUniqueStrings.m  %
static method or package function
>> exist('matlab.lang.makeUniqueStrings.m') %not sure why this happens
ans =
     0

-------
Current result (tested in Octave 6.4.0 on Ubuntu 22.04)
   query failed, but they can be called

>> exist('containers.Map')
ans = 0
>> which containers.Map
>> a=containers.Map()
a =
  containers.Map object with properties:
    Count     : 0
    KeyType   : char
    ValueType : any

>> exist('matlab.lang.makeUniqueStrings')
ans = 0
>> matlab.lang.makeUniqueStrings('test')
ans = test
>> ls '/usr/share/octave/6.4.0/m/+containers/Map.m'
/usr/share/octave/6.4.0/m/+containers/Map.m
>> ls '/usr/share/octave/6.4.0/m/+matlab/+lang/makeUniqueStrings.m'
/usr/share/octave/6.4.0/m/+matlab/+lang/makeUniqueStrings.m








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