[Octave-bug-tracker] [bug #51086] matrix concatentation of struct with empty cell arrays should work

[Mike Miller]

URL:
  <http://savannah.gnu.org/bugs/?51086>

                 Summary: matrix concatentation of struct with empty cell
arrays should work
                 Project: GNU Octave
            Submitted by: mtmiller
            Submitted on: Mon 22 May 2017 12:28:15 PM PDT
                Category: Interpreter
                Severity: 2 - Minor
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: Confirmed
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

According to a test done on the maintainers mailing list, in Matlab 2017a:


>> [struct(), {}]

ans =

  struct with no fields.



When a struct is the leading element in a row vector concatenation, and the
remaining elements are all empty cell arrays, they should be ignored, the same
as if they were empty matrices.

For example, this works in Octave:


>> [struct(), [], [], []]
ans =

  scalar structure containing the fields:




If the trailing values are empty cell arrays, they should collapse the same
way and the result should be just the scalar struct or struct array.




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