[Octave-bug-tracker] [bug #39041] concatenation of cell array and scalar struct

[Mike Miller]

Follow-up Comment #14, bug #39041 (project octave):

>From the maintainers list, in Matlab 2017a:


>> [cell(1), struct('foo','bar')]

ans =

  1×2 cell array

    []    [1×1 struct]

>> [struct('foo','bar'), cell(1)]
Error using horzcat
The following error occurred converting from cell to struct:
Conversion to struct from cell is not possible.

>> [{}, struct()]

ans =

  cell

    [1×1 struct]

>> [struct(), {}]

ans =

  struct with no fields.



That last one makes me sad. This means that if the first element is a struct
and the remaining elements are empty cell arrays, they can be ignored, and the
result is a scalar struct. But if any elements are non-empty cell arrays, then
the error is thrown.

If the leading element is a cell array, empty or not, then the result is a
cell array containing the scalar struct or struct array as a single cell
element.

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