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1 ## Copyright (C) 2010 Ben Abbott |
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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} {@var{res} =} isprop (@var{h}, @var{prop}) |
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21 ## Determines if @var{prop} is a property of the object with handle, @var{h}. |
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22 ## @seealso{get, set} |
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23 ## @end deftypefn |
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24 |
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25 ## Author: Ben Abbott <bpabbott@mac.com> |
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26 |
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27 function res = isprop (h, prop) |
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28 ## Check input |
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29 if (nargin < 1 || nargin > 2) |
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30 print_usage (); |
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31 endif |
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32 |
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33 if (! ishandle (h)) |
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34 error ("isprop: first input argument must be a handle"); |
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35 elseif (! ischar (prop)) |
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36 error ("isprop: second input argument must be string"); |
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37 endif |
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38 |
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39 res = true; |
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40 try |
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41 v = get (h, prop); |
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42 catch |
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43 res = false; |
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44 end_try_catch |
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45 endfunction |
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46 |
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47 %!assert (isprop (0, "foobar"), false) |
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48 |
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49 %!assert (isprop (0, "screenpixelsperinch"), true) |
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50 |
