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annotate scripts/miscellaneous/inputname.m @ 20654:b65888ec820e draft default tip gccjit

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dmalcom gcc jit import
author Stefan Mahr <dac922@gmx.de>
date Fri, 27 Feb 2015 16:59:36 +0100
parents d5b877b86ed4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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4197fc428c7d maint: Update copyright notices for 2015.
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1 ## Copyright (C) 2004-2015 Paul Kienzle
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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 ## Original version by Paul Kienzle distributed as free software in the
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20 ## public domain.
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21
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22 ## -*- texinfo -*-
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23 ## @deftypefn {Function File} {} inputname (@var{n})
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24 ## Return the name of the @var{n}-th argument to the calling function.
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25 ##
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26 ## If the argument is not a simple variable name, return an empty string.
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27 ## @code{inputname} may only be used within a function body, not at the
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28 ## command line.
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29 ## @seealso{nargin, nthargout}
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30 ## @end deftypefn
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31
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32 function s = inputname (n)
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33
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34 if (nargin != 1)
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35 print_usage ();
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36 endif
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37
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38 s = evalin ("caller", sprintf ("__varval__ (\".argn.\"){%d};", fix (n)));
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39 ## For compatibility with Matlab,
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40 ## return empty string if argument name is not a valid identifier.
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41 if (! isvarname (s))
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42 s = "";
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43 endif
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44
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45 endfunction
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47
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48 ## Warning: heap big magic in the following tests!!!
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49 ## The test function builds a private context for each
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50 ## test, with only the specified values shared between
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51 ## them. It does this using the following template:
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52 ##
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53 ## function [<shared>] = testfn(<shared>)
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54 ## <test>
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55 ##
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56 ## To test inputname, I need a function context invoked
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57 ## with known parameter names. So define a couple of
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58 ## shared parameters, et voila!, the test is trivial.
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60 %!shared hello, worldly
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61 %!assert (inputname (1), "hello")
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62 %!assert (inputname (2), "worldly")
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63
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64 %!function r = __foo__ (x, y)
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65 %! r = inputname (2);
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66 %!endfunction
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67 %!assert (__foo__ (pi, e), "e");
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68 %!assert (feval (@__foo__, pi, e), "e");
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70 %!error inputname ()
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71 %!error inputname (1,2)
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