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1 ## Copyright (C) 2000 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 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} {[@var{k1},..., @var{v1}] =} setfield (@var{s}, @var{k1}, @var{v1}, @dots{}) |
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22 ## Set field members in a structure. |
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23 ## |
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24 ## @example |
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25 ## @group |
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26 ## oo(1,1).f0= 1; |
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27 ## oo = setfield(oo,@{1,2@},'fd',@{3@},'b', 6); |
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28 ## oo(1,2).fd(3).b == 6 |
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29 ## @result{} ans = 1 |
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30 ## @end group |
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31 ## @end example |
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32 ## |
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33 ## Note that this function could be written |
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34 ## |
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35 ## @example |
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36 ## i1= @{1,2@}; i2= 'fd'; i3= @{3@}; i4= 'b'; |
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37 ## oo( i1@{:@} ).( i2 )( i3@{:@} ).( i4 ) == 6; |
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38 ## @end example |
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39 ## @seealso{getfield, rmfield, isfield, isstruct, fieldnames, struct} |
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40 ## @end deftypefn |
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41 |
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42 ## Author: Etienne Grossmann <etienne@cs.uky.edu> |
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43 |
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44 function obj = setfield (obj, varargin) |
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45 field = "obj"; |
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46 for i = 1:nargin-2 |
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47 v = varargin{i}; |
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48 if (iscell (v)) |
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49 sep = "("; |
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50 for j = 1:length (v) |
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51 field = sprintf ("%s%s%s", field, sep, num2str (v{j})); |
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52 sep = ","; |
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53 endfor |
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54 field = sprintf ("%s)", field); |
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55 else |
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56 field = sprintf ("%s.%s", field, v); |
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57 endif |
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58 endfor |
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59 val = varargin{nargin-1}; |
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60 eval (sprintf ("%s=val;", field)); |
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61 endfunction |
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62 |
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63 %!test |
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64 %! x.a = "hello"; |
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65 %! x = setfield(x,"b","world"); |
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66 %! y = struct('a','hello','b','world'); |
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67 %! assert(x,y); |
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68 %!test |
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69 %! oo(1,1).f0= 1; |
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70 %! oo = setfield(oo,{1,2},'fd',{3},'b', 6); |
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71 %! assert (oo(1,2).fd(3).b, 6) |
