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version is now 3.3.52
author John W. Eaton <jwe@octave.org>
date Sun, 01 Aug 2010 11:49:45 -0400
parents 57a59eae83cc
children fd0a3ac60b0e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005,
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4 2006, 2007, 2008, 2009 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 "defun.h"
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29 #include "error.h"
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30 #include "pt-cmd.h"
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31 #include "ov.h"
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32 #include "oct-lvalue.h"
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33 #include "pt-bp.h"
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34 #include "pt-decl.h"
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35 #include "pt-exp.h"
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36 #include "pt-id.h"
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37 #include "pt-walk.h"
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38 #include "utils.h"
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39 #include "variables.h"
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40
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41 // Declarations (global, static, etc.).
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42
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43 tree_decl_elt::~tree_decl_elt (void)
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44 {
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45 delete id;
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46 delete expr;
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47 }
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48
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49 bool
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50 tree_decl_elt::eval (void)
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51 {
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52 bool retval = false;
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53
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54 if (id && expr)
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55 {
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56 octave_lvalue ult = id->lvalue ();
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57
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58 octave_value init_val = expr->rvalue1 ();
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59
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60 if (! error_state)
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61 {
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62 ult.assign (octave_value::op_asn_eq, init_val);
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63
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64 retval = true;
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65 }
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66 }
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67
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68 return retval;
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69 }
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70
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71 tree_decl_elt *
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72 tree_decl_elt::dup (symbol_table::scope_id scope,
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73 symbol_table::context_id context) const
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74 {
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75 return new tree_decl_elt (id ? id->dup (scope, context) : 0,
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76 expr ? expr->dup (scope, context) : 0);
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77 }
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78
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79 void
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80 tree_decl_elt::accept (tree_walker& tw)
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81 {
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82 tw.visit_decl_elt (*this);
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83 }
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84
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85 // Initializer lists for declaration statements.
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86
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87 tree_decl_init_list *
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88 tree_decl_init_list::dup (symbol_table::scope_id scope,
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89 symbol_table::context_id context) const
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90 {
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91 tree_decl_init_list *new_dil = new tree_decl_init_list ();
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92
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93 for (const_iterator p = begin (); p != end (); p++)
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94 {
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95 const tree_decl_elt *elt = *p;
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96
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97 new_dil->append (elt ? elt->dup (scope, context) : 0);
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98 }
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99
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100 return new_dil;
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101 }
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102
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103 void
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104 tree_decl_init_list::accept (tree_walker& tw)
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105 {
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106 tw.visit_decl_init_list (*this);
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107 }
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108
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109 // Base class for declaration commands (global, static).
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110
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111 tree_decl_command::~tree_decl_command (void)
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112 {
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113 delete init_list;
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114 }
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115
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116 // Global.
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117
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118 tree_command *
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119 tree_global_command::dup (symbol_table::scope_id scope,
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120 symbol_table::context_id context) const
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121 {
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122 return
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123 new tree_global_command (init_list ? init_list->dup (scope, context) : 0,
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124 line (), column ());
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125 }
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126
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127 void
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128 tree_global_command::accept (tree_walker& tw)
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129 {
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130 tw.visit_global_command (*this);
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131 }
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132
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133 // Static.
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134
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135 tree_command *
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136 tree_static_command::dup (symbol_table::scope_id scope,
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137 symbol_table::context_id context) const
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138 {
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139 return
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140 new tree_static_command (init_list ? init_list->dup (scope, context) : 0,
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141 line (), column ());
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142 }
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143
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144 void
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145 tree_static_command::accept (tree_walker& tw)
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146 {
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147 tw.visit_static_command (*this);
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148 }