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1 ## Copyright (C) 2006 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 2, or (at your option) |
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8 ## 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, write to the Free |
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17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 ## 02110-1301, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} setfield (@var{type}, @var{subs}, @dots{}) |
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22 ## Create a subscript structure for use with @code{subsref} or |
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23 ## @code{subsasgn}. |
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24 ## |
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25 ## @example |
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26 ## @group |
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27 ## @end group |
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28 ## @end example |
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29 ## @seealso{subsref, subsasgn} |
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30 ## @end deftypefn |
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31 |
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32 ## Author: jwe |
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33 |
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34 function retval = substruct (varargin) |
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35 |
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36 nargs = nargin; |
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37 |
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38 if (nargs > 1 && mod (nargs, 2) == 0) |
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39 narg_pairs = nargs / 2; |
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40 typ = cell (narg_pairs, 1); |
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41 sub = cell (narg_pairs, 1); |
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42 k = 1; |
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43 for i = 1:2:nargs |
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44 t = varargin{i}; |
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45 dot = false; |
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46 switch (t) |
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47 case { "()", "{}" } |
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48 case "." |
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49 dot = true; |
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50 otherwise |
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51 error ("substruct: expecting type to be one of \"()\", \"{}\", or \".\""); |
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52 endswitch |
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53 s = varargin{i+1}; |
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54 if (dot) |
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55 if (! ischar (s)) |
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56 error ("substruct: for type == %s, subs must be a character string", t); |
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57 endif |
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58 elseif (! (iscell (s) || (ischar (s) && strcmp (s, ":")))) |
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59 error ("substruct: for type == %s, subs must be a cell array or \":\"", |
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60 t); |
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61 endif |
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62 typ{k} = t; |
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63 sub{k} = s; |
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64 k++; |
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65 endfor |
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66 retval = struct ("type", typ, "subs", sub); |
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67 else |
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68 print_usage (); |
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69 endif |
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70 |
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71 endfunction |
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72 |
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73 %!test |
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74 %! x(1,1).type = "()"; |
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75 %! x(2,1).type = "{}"; |
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76 %! x(3,1).type = "."; |
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77 %! x(1,1).subs = {1,2,3}; |
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78 %! x(2,1).subs = ":"; |
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79 %! x(3,1).subs = "foo"; |
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80 %! y = substruct ("()", {1,2,3}, "{}", ":", ".", "foo"); |
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81 %! assert(x,y); |
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82 %!error assert(substruct); |
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83 %!error assert(substruct (1, 2, 3)); |
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84 %!error assert(substruct ("x", 1)); |
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85 %!error assert(substruct ("()", [1,2,3])); |
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86 %!error assert(substruct (".", {1,2,3})); |
