[Octave-bug-tracker] [bug #30087] isfield responds incorrectly to multiple field-names

[Esben Skovenborg]

URL:
  <http://savannah.gnu.org/bugs/?30087>

                 Summary: isfield responds incorrectly to multiple
field-names
                 Project: GNU Octave
            Submitted by: esskov
            Submitted on: Tue 08 Jun 2010 10:02:54 PM GMT
                Category: None
                Severity: 3 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.2.3
        Operating System: GNU/Linux

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Details:

Years ago Matlab extended the isfield function to accept a cell array as the
second argument. The return value would then be a logical array with values
corresponding to whether each field existed in the struct.

s = struct('a',1, 'b',2);
isfield(s,{'a','c'})

Expected result: [true false]
Octave 3.2.3 result: [false]

This extended syntax for isfield is very convenient, and is used in some
Matlab scripts which would otherwise run nicely in Octave.

I've set the Item Group to Incorrect Result (rather than Feature Request)
because Octave fails to warn the user that it does not (yet) support this
syntax, but instead returns what Matlab users would consider an incorrect
result.




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