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annotate src/oct-lvalue.cc @ 10771:82d9efde7e96

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pr-output.cc: Avoid use of % operator on negative operands to ensure compatability between C++ compilers.
author Rik <octave@nomad.inbox5.com>
date Wed, 07 Jul 2010 15:27:17 -0700
parents d1194069e58c
children fd0a3ac60b0e
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1 /*
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2
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3 Copyright (C) 1996, 1997, 1998, 1999, 2002, 2004, 2005, 2007
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4 John W. Eaton
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifdef HAVE_CONFIG_H
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25 #include <config.h>
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26 #endif
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27
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28 #include "error.h"
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29 #include "oct-obj.h"
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30 #include "oct-lvalue.h"
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31 #include "ov.h"
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32
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33 void
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34 octave_lvalue::assign (octave_value::assign_op op, const octave_value& rhs)
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35 {
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36 if (val)
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37 {
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38 if (idx.empty ())
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39 val->assign (op, rhs);
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40 else
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41 val->assign (op, type, idx, rhs);
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42 }
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43 }
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44
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45 void
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46 octave_lvalue::set_index (const std::string& t,
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47 const std::list<octave_value_list>& i)
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48 {
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49 if (idx.empty ())
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50 {
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51 type = t;
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52 idx = i;
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53 }
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54 else
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55 error ("invalid index expression in assignment");
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56 }
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57
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58 void
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59 octave_lvalue::do_unary_op (octave_value::unary_op op)
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60 {
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61 if (val)
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62 {
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63 if (idx.empty ())
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64 val->do_non_const_unary_op (op);
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65 else
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66 val->do_non_const_unary_op (op, type, idx);
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67 }
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68 else
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69 error ("internal: invalid operation on ~");
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70 }
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71
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72 octave_value
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73 octave_lvalue::value (void)
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74 {
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75 octave_value retval;
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76
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77 if (val)
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78 {
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79 if (idx.empty ())
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80 retval = *val;
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81 else
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82 {
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83 if (val->is_constant ())
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84 retval = val->subsref (type, idx);
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85 else
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86 {
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87 octave_value_list t = val->subsref (type, idx, 1);
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88 if (t.length () > 0)
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89 retval = t(0);
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90 }
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91 }
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92 }
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93
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94 return retval;
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95 }