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1 ## Copyright (C) 2000, 2006, 2007 Etienne Grossmann |
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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 {Function File} {[@var{k1}, @dots{}, @var{v1}] =} setfield (@var{s}, @var{k1}, @var{v1}, @dots{}) |
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21 ## Set field members in a structure. |
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22 ## |
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23 ## @example |
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24 ## @group |
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25 ## oo(1,1).f0 = 1; |
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26 ## oo = setfield (oo, @{1,2@}, "fd", @{3@}, "b", 6); |
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27 ## oo(1,2).fd(3).b == 6 |
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28 ## @result{} ans = 1 |
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29 ## @end group |
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30 ## @end example |
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31 ## |
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32 ## Note that this function could be written |
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33 ## |
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34 ## @example |
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35 ## i1 = @{1,2@}; i2 = "fd"; i3 = @{3@}; i4 = "b"; |
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36 ## oo(i1@{:@}).(i2)(i3@{:@}).(i4) == 6; |
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37 ## @end example |
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38 ## @seealso{getfield, rmfield, isfield, isstruct, fieldnames, struct} |
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39 ## @end deftypefn |
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40 |
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41 ## Author: Etienne Grossmann <etienne@cs.uky.edu> |
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42 |
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43 function obj = setfield (obj, varargin) |
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44 field = "obj"; |
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45 for i = 1:nargin-2 |
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46 v = varargin{i}; |
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47 if (iscell (v)) |
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48 sep = "("; |
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49 for j = 1:length (v) |
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50 field = sprintf ("%s%s%s", field, sep, num2str (v{j})); |
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51 sep = ","; |
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52 endfor |
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53 field = sprintf ("%s)", field); |
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54 else |
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55 field = sprintf ("%s.%s", field, v); |
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56 endif |
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57 endfor |
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58 val = varargin{nargin-1}; |
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59 eval (sprintf ("%s=val;", field)); |
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60 endfunction |
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61 |
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62 %!test |
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63 %! x.a = "hello"; |
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64 %! x = setfield(x,"b","world"); |
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65 %! y = struct("a","hello","b","world"); |
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66 %! assert(x,y); |
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67 %!test |
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68 %! oo(1,1).f0= 1; |
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69 %! oo = setfield(oo,{1,2},"fd",{3},"b", 6); |
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70 %! assert (oo(1,2).fd(3).b, 6) |
