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annotate libinterp/parse-tree/pt-unop.cc @ 19629:be7ac98fab43 gui-release

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strip trailing whitespace from most source files * NEWS, etc/NEWS.3, libgui/graphics/Backend.h, libgui/graphics/ButtonControl.h, libgui/graphics/EditControl.cc, libgui/graphics/Object.h, libgui/graphics/QtHandlesUtils.cc, libgui/graphics/ToolBarButton.h, libgui/graphics/__init_qt__.cc, libgui/graphics/gl-select.cc, libgui/qterminal/libqterminal/unix/TerminalView.cpp, libgui/qterminal/libqterminal/unix/TerminalView.h, libgui/qterminal/libqterminal/win32/QWinTerminalImpl.cpp, libgui/src/m-editor/file-editor-tab.cc, libgui/src/m-editor/file-editor.cc, libgui/src/m-editor/file-editor.h, libgui/src/m-editor/octave-qscintilla.cc, libgui/src/settings-dialog.cc, libgui/src/shortcut-manager.cc, libgui/src/workspace-view.cc, libinterp/corefcn/graphics.cc, libinterp/corefcn/input.cc, libinterp/parse-tree/pt-unop.cc, liboctave/array/dSparse.h, scripts/pkg/pkg.m, scripts/polynomial/polyeig.m, test/io.tst: Strip trailing whitespace.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 09:43:29 -0500
parents 91cd85a75705
children 4197fc428c7d
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1 /*
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2
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3 Copyright (C) 1996-2013 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 3 of the License, or (at your
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
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10 option) any 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, see
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19 <http://www.gnu.org/licenses/>.
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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 #include "profiler.h"
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32 #include "pt-bp.h"
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33 #include "pt-unop.h"
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34 #include "pt-walk.h"
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35
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36 // Unary expressions.
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37
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38 std::string
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39 tree_unary_expression::oper (void) const
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40 {
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41 return octave_value::unary_op_as_string (etype);
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42 }
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43
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44 // Prefix expressions.
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45
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46 octave_value_list
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47 tree_prefix_expression::rvalue (int nargout)
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48 {
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49 octave_value_list retval;
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50
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51 if (nargout > 1)
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52 error ("prefix operator '%s': invalid number of output arguments",
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53 oper () . c_str ());
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54 else
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55 retval = rvalue1 (nargout);
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56
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57 return retval;
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58 }
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59
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60 octave_value
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61 tree_prefix_expression::rvalue1 (int)
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62 {
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63 octave_value retval;
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64
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65 if (error_state)
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66 return retval;
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67
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68 if (op)
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69 {
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70 if (etype == octave_value::op_incr || etype == octave_value::op_decr)
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71 {
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72 octave_lvalue ref = op->lvalue ();
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73
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74 if (! error_state)
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75 {
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76 BEGIN_PROFILER_BLOCK (tree_prefix_expression)
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77
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78 ref.do_unary_op (etype);
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79
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80 if (! error_state)
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81 retval = ref.value ();
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82
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83 END_PROFILER_BLOCK
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84 }
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85 }
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86 else
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87 {
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88 octave_value val = op->rvalue1 ();
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89
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90 if (! error_state && val.is_defined ())
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91 {
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92 BEGIN_PROFILER_BLOCK (tree_prefix_expression)
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93
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94 // Attempt to do the operation in-place if it is unshared
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95 // (a temporary expression).
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96 if (val.get_count () == 1)
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97 retval = val.do_non_const_unary_op (etype);
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98 else
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99 retval = ::do_unary_op (etype, val);
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100
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101 if (error_state)
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102 retval = octave_value ();
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103
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104 END_PROFILER_BLOCK
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105 }
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106 }
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107 }
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108
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109 return retval;
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110 }
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111
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112 tree_expression *
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113 tree_prefix_expression::dup (symbol_table::scope_id scope,
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114 symbol_table::context_id context) const
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115 {
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116 tree_prefix_expression *new_pe
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117 = new tree_prefix_expression (op ? op->dup (scope, context) : 0,
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118 line (), column (), etype);
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119
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120 new_pe->copy_base (*this);
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121
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122 return new_pe;
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123 }
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124
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125 void
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126 tree_prefix_expression::accept (tree_walker& tw)
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127 {
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128 tw.visit_prefix_expression (*this);
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129 }
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130
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131 // Postfix expressions.
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132
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133 octave_value_list
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134 tree_postfix_expression::rvalue (int nargout)
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135 {
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136 octave_value_list retval;
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137
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138 if (nargout > 1)
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139 error ("postfix operator '%s': invalid number of output arguments",
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140 oper () . c_str ());
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141 else
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142 retval = rvalue1 (nargout);
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143
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144 return retval;
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145 }
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146
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147 octave_value
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148 tree_postfix_expression::rvalue1 (int)
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149 {
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150 octave_value retval;
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151
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152 if (error_state)
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153 return retval;
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154
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155 if (op)
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156 {
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157 if (etype == octave_value::op_incr || etype == octave_value::op_decr)
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158 {
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159 octave_lvalue ref = op->lvalue ();
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160
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161 if (! error_state)
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162 {
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163 retval = ref.value ();
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164
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165 BEGIN_PROFILER_BLOCK (tree_postfix_expression)
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166
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167 ref.do_unary_op (etype);
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168
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169 END_PROFILER_BLOCK
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170 }
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171 }
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172 else
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173 {
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174 octave_value val = op->rvalue1 ();
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175
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176 if (! error_state && val.is_defined ())
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177 {
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178 BEGIN_PROFILER_BLOCK (tree_postfix_expression)
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179
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180 retval = ::do_unary_op (etype, val);
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181
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182 if (error_state)
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183 retval = octave_value ();
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184
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185 END_PROFILER_BLOCK
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186 }
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187 }
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188 }
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189
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190 return retval;
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191 }
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192
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193 tree_expression *
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194 tree_postfix_expression::dup (symbol_table::scope_id scope,
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195 symbol_table::context_id context) const
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196 {
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197 tree_postfix_expression *new_pe
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198 = new tree_postfix_expression (op ? op->dup (scope, context) : 0,
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199 line (), column (), etype);
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200
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201 new_pe->copy_base (*this);
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202
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203 return new_pe;
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204 }
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205
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206 void
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207 tree_postfix_expression::accept (tree_walker& tw)
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208 {
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209 tw.visit_postfix_expression (*this);
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210 }