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display.m: print usage message if nargin != 1
author John W. Eaton <jwe@octave.org>
date Mon, 12 Jul 2010 09:53:28 -0400
parents 16f53d29049f
children fd0a3ac60b0e
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1 ## Copyright (C) 2008, 2009 David Bateman
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} display (@var{a})
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21 ## Display the contents of an object. If @var{a} is an object of the
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22 ## class "myclass", then @code{display} is called in a case like
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23 ##
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24 ## @example
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25 ## myclass (@dots{})
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26 ## @end example
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27 ##
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28 ## @noindent
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29 ## where Octave is required to display the contents of a variable of the
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30 ## type "myclass".
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31 ##
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32 ## @seealso{class, subsref, subsasgn}
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33 ## @end deftypefn
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34
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35 function idx = display (a)
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36 if (nargin == 1)
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37 error ("display: not defined for class \"%s\"", class(a));
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38 else
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39 print_usage ();
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40 endif
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41 endfunction