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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include "error.h" |
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28 #include "oct-obj.h" |
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29 #include "oct-lvalue.h" |
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30 #include "ov.h" |
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31 |
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32 void |
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33 octave_lvalue::assign (octave_value::assign_op op, const octave_value& rhs) |
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34 { |
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35 octave_value saved_val; |
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36 |
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37 if (chg_fcn) |
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38 saved_val = *val; |
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39 |
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40 if (idx.empty ()) |
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41 { |
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42 if (struct_elt_name.empty ()) |
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43 val->assign (op, rhs); |
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44 else |
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45 val->assign_struct_elt (op, struct_elt_name, rhs); |
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46 } |
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47 else |
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48 { |
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49 if (struct_elt_name.empty ()) |
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50 val->assign (op, idx, rhs); |
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51 else |
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52 val->assign_struct_elt (op, struct_elt_name, idx, rhs); |
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53 } |
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54 |
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55 if (chg_fcn && ! error_state && chg_fcn () < 0) |
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56 *val = saved_val; |
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57 } |
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58 |
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59 void |
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60 octave_lvalue::set_index (const octave_value_list& i, |
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61 tree_index_expression::type t) |
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62 { |
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63 if (! index_set) |
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64 { |
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65 idx = i; |
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66 itype = t; |
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67 index_set = true; |
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68 } |
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69 else |
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70 error ("invalid index expression in assignment"); |
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71 } |
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72 |
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73 void |
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74 octave_lvalue::do_unary_op (octave_value::unary_op op) |
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75 { |
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76 octave_value saved_val; |
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77 |
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78 if (chg_fcn) |
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79 saved_val = *val; |
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80 |
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81 if (idx.empty ()) |
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82 val->do_non_const_unary_op (op); |
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83 else |
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84 val->do_non_const_unary_op (op, idx); |
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85 |
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86 if (chg_fcn && ! error_state && chg_fcn () < 0) |
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87 *val = saved_val; |
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88 } |
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89 |
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90 /* |
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91 ;;; Local Variables: *** |
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92 ;;; mode: C++ *** |
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93 ;;; End: *** |
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94 */ |
