1 ## Copyright (C) 2004-2012 Paul Kienzle
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
19 ## Original version by Paul Kienzle distributed as free software in the
23 ## @deftypefn {Function File} {} inputname (@var{n})
24 ## Return the name of the @var{n}-th argument to the calling function.
25 ## If the argument is not a simple variable name, return an empty string.
28 function s = inputname (n)
31 s = evalin ("caller", sprintf ("__varval__ (\".argn.\"){%d};", n));
32 ## For compatibility with Matlab, return empty string if argument
33 ## name is not a valid identifier.
43 ## Warning: heap big magic in the following tests!!!
44 ## The test function builds a private context for each
45 ## test, with only the specified values shared between
46 ## them. It does this using the following template:
48 ## function [<shared>] = testfn(<shared>)
51 ## To test inputname, I need a function context invoked
52 ## with known parameter names. So define a couple of
53 ## shared parameters, et voila!, the test is trivial.
54 %!shared hello,worldly
55 %!assert(inputname(1),'hello');
56 %!assert(inputname(2),'worldly');