annotate scripts/help/which.m @ 20595:c1a6c31ac29a

eliminate more simple uses of error_state * ov-classdef.cc: Eliminate simple uses of error_state.
author John W. Eaton <jwe@octave.org>
date Tue, 06 Oct 2015 00:20:02 -0400
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children
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1 ## Copyright (C) 2009-2015 John W. Eaton
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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 {Command} {} which name @dots{}
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21 ## Display the type of each @var{name}.
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22 ##
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23 ## If @var{name} is defined from a function file, the full name of the file is
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24 ## also displayed.
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25 ## @seealso{help, lookfor}
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26 ## @end deftypefn
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27
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28 function varargout = which (varargin)
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29
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30 if (nargin > 0 && iscellstr (varargin))
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31 m = __which__ (varargin{:});
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32
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33 ## Check whether each name is a variable, variables take precedence over
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34 ## functions in name resolution.
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35 for i = 1:nargin
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36 m(i).is_variable = evalin ("caller",
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37 ["exist (\"" m(i).name "\", \"var\")"], false);
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38 if (m(i).is_variable)
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39 m(i).file = "variable";
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40 endif
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41 endfor
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42
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43 if (nargout == 0)
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44 for i = 1:nargin
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45 if (m(i).is_variable)
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46 printf ("'%s' is a variable\n", m(i).name);
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47 elseif (isempty (m(i).file))
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48 if (! isempty (m(i).type))
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49 printf ("'%s' is a %s\n",
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50 m(i).name, m(i).type);
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51 endif
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52 else
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53 if (isempty (m(i).type))
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54 printf ("'%s' is the file %s\n",
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55 m(i).name, m(i).file);
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56 else
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57 printf ("'%s' is a %s from the file %s\n",
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58 m(i).name, m(i).type, m(i).file);
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59 endif
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60 endif
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61 endfor
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62 else
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63 varargout = {m.file};
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64 endif
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65 else
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66 print_usage ();
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67 endif
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68
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69 endfunction
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71
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72 %!test
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73 %! str = which ("ls");
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74 %! assert (str(end-17:end), strcat ("miscellaneous", filesep (), "ls.m"));
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75 %!test
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76 %! str = which ("amd");
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77 %! assert (str(end-6:end), "amd.oct");
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78
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79 %!assert (which ("_NO_SUCH_NAME_"), "")
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80
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81 %!test
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82 %! x = 3;
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83 %! str = which ("x");
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84 %! assert (str, "variable");
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86 %!test
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87 %! str = which ("amd");
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88 %! assert (str(end-6:end), "amd.oct");
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89 %! amd = 12;
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90 %! str = which ("amd");
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91 %! assert (str, "variable");
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92 %! clear amd;
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93 %! str = which ("amd");
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94 %! assert (str(end-6:end), "amd.oct");