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annotate scripts/general/display.m @ 20798:128414587af2

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don't print additional error message in argument list evaluation * pt-arg-list.cc (tree_argument_list::convert_to_const_vector): Don't call error for for failed argument evaluation.
author John W. Eaton <jwe@octave.org>
date Fri, 09 Oct 2015 16:52:49 -0400
parents 7503499a252b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 ## Copyright (C) 2008-2015 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.
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22 ##
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23 ## If @var{a} is an object of the class @qcode{"myclass"}, then @code{display}
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24 ## is called in a case like
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25 ##
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26 ## @example
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27 ## myclass (@dots{})
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28 ## @end example
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29 ##
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30 ## @noindent
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31 ## where Octave is required to display the contents of a variable of the
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32 ## type @qcode{"myclass"}.
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33 ##
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34 ## @seealso{class, subsref, subsasgn}
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35 ## @end deftypefn
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36
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37 function idx = display (a)
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38
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39 if (nargin != 1)
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40 print_usage ();
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41 endif
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42
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43 ## Only reason we got here is that there was no overloaded display()
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44 ## function for object a. This may mean it is a built-in.
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45 str = disp (a);
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46 if (isempty (strfind (str, "<class ")))
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47 disp (str);
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48 else
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49 error ('display: not defined for class "%s"', class (a));
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50 endif
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51
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52 endfunction
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53