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annotate scripts/miscellaneous/mustBeReal.m @ 33639:65b1cf6aa60a bytecode-interpreter tip

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maint: Merge default to bytecode-interpreter
author Arun Giridhar <arungiridhar@gmail.com>
date Mon, 03 Jun 2024 14:38:47 -0400
parents 2e484f9f1f18
children
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1 ########################################################################
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2 ##
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3 ## Copyright (C) 2019-2024 The Octave Project Developers
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4 ##
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5 ## See the file COPYRIGHT.md in the top-level directory of this
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6 ## distribution or <https://octave.org/copyright/>.
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7 ##
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8 ## This file is part of Octave.
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9 ##
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10 ## Octave is free software: you can redistribute it and/or modify it
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11 ## under the terms of the GNU General Public License as published by
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12 ## the Free Software Foundation, either version 3 of the License, or
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13 ## (at your option) any later version.
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14 ##
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15 ## Octave is distributed in the hope that it will be useful, but
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16 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ## GNU General Public License for more details.
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19 ##
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20 ## You should have received a copy of the GNU General Public License
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21 ## along with Octave; see the file COPYING. If not, see
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22 ## <https://www.gnu.org/licenses/>.
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23 ##
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24 ########################################################################
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25
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26 ## -*- texinfo -*-
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27 ## @deftypefn {} {} mustBeReal (@var{x})
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28 ##
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29 ## Require that input @var{x} is real.
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30 ##
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31 ## Raise an error if the input @var{x} is not real, as determined by
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32 ## @code{isreal (@var{x})}.
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33 ##
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34 ## @seealso{mustBeFinite, mustBeNonNan, isreal}
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35 ## @end deftypefn
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36
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37 function mustBeReal (x)
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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 if (! isreal (x))
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44 label = inputname (1);
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45 if (isempty (label))
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46 label = "input";
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47 endif
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48 error ("%s must be real", label);
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49 endif
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50
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51 endfunction
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52
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53
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54 %!test
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55 %! mustBeReal ([]);
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56 %! mustBeReal (42);
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57 %! mustBeReal (Inf);
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58 %! mustBeReal (NaN);
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59 %! mustBeReal (1:100);
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60 %! mustBeReal (int32 (42));
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61
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62 %!error <Invalid call> mustBeReal ()
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63 %!error <must be real> mustBeReal (i)
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64 %!error <input must be real> mustBeReal (2 + i)