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annotate libinterp/parse-tree/pt-select.h @ 30565:83f9f8bda883

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maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Tue, 28 Dec 2021 18:59:33 -0500
parents 91c6288781ba 796f54d4ddbf
children e88a07dec498
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_pt_select_h)
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27 #define octave_pt_select_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include "base-list.h"
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32 #include "comment-list.h"
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33 #include "pt-cmd.h"
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34 #include "pt-walk.h"
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35
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36 namespace octave
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37 {
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38 class tree_expression;
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39 class tree_statement_list;
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40
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41 // If.
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42
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43 class tree_if_clause : public tree
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44 {
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45 public:
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46
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47 tree_if_clause (int l = -1, int c = -1)
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48 : tree (l, c), m_expr (nullptr), m_list (nullptr), m_lead_comm (nullptr)
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49 { }
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50
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51 tree_if_clause (tree_statement_list *sl, comment_list *lc = nullptr,
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52 int l = -1, int c = -1)
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53 : tree (l, c), m_expr (nullptr), m_list (sl), m_lead_comm (lc) { }
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54
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55 tree_if_clause (tree_expression *e, tree_statement_list *sl,
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56 comment_list *lc = nullptr,
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57 int l = -1, int c = -1)
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58 : tree (l, c), m_expr (e), m_list (sl), m_lead_comm (lc) { }
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59
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60 // No copying!
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61
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62 tree_if_clause (const tree_if_clause&) = delete;
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63
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64 tree_if_clause& operator = (const tree_if_clause&) = delete;
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65
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66 ~tree_if_clause (void);
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67
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68 bool is_else_clause (void) { return ! m_expr; }
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69
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70 tree_expression * condition (void) { return m_expr; }
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71
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72 tree_statement_list * commands (void) { return m_list; }
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73
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74 comment_list * leading_comment (void) { return m_lead_comm; }
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75
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76 void accept (tree_walker& tw)
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77 {
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78 tw.visit_if_clause (*this);
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79 }
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80
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81 private:
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82
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83 // The condition to test.
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84 tree_expression *m_expr;
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85
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86 // The list of statements to evaluate if expr is true.
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87 tree_statement_list *m_list;
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88
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89 // Comment preceding ELSE or ELSEIF token.
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90 comment_list *m_lead_comm;
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91 };
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92
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93 class tree_if_command_list : public base_list<tree_if_clause *>
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94 {
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95 public:
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96
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97 tree_if_command_list (void) { }
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98
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99 tree_if_command_list (tree_if_clause *t) { append (t); }
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100
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101 // No copying!
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102
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103 tree_if_command_list (const tree_if_command_list&) = delete;
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104
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105 tree_if_command_list& operator = (const tree_if_command_list&) = delete;
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106
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107 ~tree_if_command_list (void)
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108 {
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109 while (! empty ())
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110 {
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111 auto p = begin ();
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112 delete *p;
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113 erase (p);
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114 }
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115 }
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116
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117 void accept (tree_walker& tw)
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118 {
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119 tw.visit_if_command_list (*this);
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120 }
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121 };
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122
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123 class tree_if_command : public tree_command
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124 {
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125 public:
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126
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127 tree_if_command (int l = -1, int c = -1)
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128 : tree_command (l, c), m_list (nullptr),
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129 m_lead_comm (nullptr), m_trail_comm (nullptr)
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130 { }
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131
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132 tree_if_command (tree_if_command_list *lst, comment_list *lc,
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133 comment_list *tc, int l = -1, int c = -1)
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134 : tree_command (l, c), m_list (lst), m_lead_comm (lc), m_trail_comm (tc)
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135 { }
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136
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137 // No copying!
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138
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139 tree_if_command (const tree_if_command&) = delete;
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140
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141 tree_if_command& operator = (const tree_if_command&) = delete;
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142
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143 ~tree_if_command (void);
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144
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145 tree_if_command_list * cmd_list (void) { return m_list; }
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146
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147 comment_list * leading_comment (void) { return m_lead_comm; }
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148
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149 comment_list * trailing_comment (void) { return m_trail_comm; }
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150
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151 void accept (tree_walker& tw)
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152 {
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153 tw.visit_if_command (*this);
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154 }
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155
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156 private:
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157
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158 // List of if commands (if, elseif, elseif, ... else, endif)
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159 tree_if_command_list *m_list;
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160
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161 // Comment preceding IF token.
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162 comment_list *m_lead_comm;
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163
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164 // Comment preceding ENDIF token.
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165 comment_list *m_trail_comm;
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166 };
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167
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168 // Switch.
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169
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170 class tree_switch_case : public tree
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171 {
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172 public:
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173
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174 tree_switch_case (int l = -1, int c = -1)
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175 : tree (l, c), m_label (nullptr), m_list (nullptr), m_lead_comm (nullptr)
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176 { }
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177
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178 tree_switch_case (tree_statement_list *sl, comment_list *lc = nullptr,
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179 int l = -1, int c = -1)
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180 : tree (l, c), m_label (nullptr), m_list (sl), m_lead_comm (lc) { }
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181
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182 tree_switch_case (tree_expression *e, tree_statement_list *sl,
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183 comment_list *lc = nullptr,
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184 int l = -1, int c = -1)
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185 : tree (l, c), m_label (e), m_list (sl), m_lead_comm (lc) { }
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186
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187 // No copying!
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188
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189 tree_switch_case (const tree_switch_case&) = delete;
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190
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191 tree_switch_case& operator = (const tree_switch_case&) = delete;
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192
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193 ~tree_switch_case (void);
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194
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195 bool is_default_case (void) { return ! m_label; }
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196
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197 tree_expression * case_label (void) { return m_label; }
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198
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199 tree_statement_list * commands (void) { return m_list; }
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200
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201 comment_list * leading_comment (void) { return m_lead_comm; }
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202
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203 void accept (tree_walker& tw)
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204 {
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205 tw.visit_switch_case (*this);
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206 }
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207
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208 private:
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209
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210 // The case label.
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211 tree_expression *m_label;
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212
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213 // The list of statements to evaluate if the label matches.
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214 tree_statement_list *m_list;
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215
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216 // Comment preceding CASE or OTHERWISE token.
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217 comment_list *m_lead_comm;
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218 };
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219
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220 class tree_switch_case_list : public base_list<tree_switch_case *>
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221 {
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222 public:
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223
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224 tree_switch_case_list (void) { }
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225
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226 tree_switch_case_list (tree_switch_case *t) { append (t); }
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227
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228 // No copying!
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229
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230 tree_switch_case_list (const tree_switch_case_list&) = delete;
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231
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232 tree_switch_case_list& operator = (const tree_switch_case_list&) = delete;
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233
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234 ~tree_switch_case_list (void)
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235 {
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236 while (! empty ())
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237 {
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238 auto p = begin ();
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239 delete *p;
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240 erase (p);
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241 }
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242 }
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243
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244 void accept (tree_walker& tw)
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245 {
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246 tw.visit_switch_case_list (*this);
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247 }
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248 };
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249
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250 class tree_switch_command : public tree_command
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251 {
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252 public:
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253
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254 tree_switch_command (int l = -1, int c = -1)
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255 : tree_command (l, c), m_expr (nullptr), m_list (nullptr),
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256 m_lead_comm (nullptr), m_trail_comm (nullptr) { }
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257
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258 tree_switch_command (tree_expression *e, tree_switch_case_list *lst,
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259 comment_list *lc, comment_list *tc,
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260 int l = -1, int c = -1)
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261 : tree_command (l, c), m_expr (e), m_list (lst), m_lead_comm (lc),
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262 m_trail_comm (tc) { }
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263
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264 // No copying!
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265
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266 tree_switch_command (const tree_switch_command&) = delete;
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267
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268 tree_switch_command& operator = (const tree_switch_command&) = delete;
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269
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270 ~tree_switch_command (void);
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271
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272 tree_expression * switch_value (void) { return m_expr; }
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273
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274 tree_switch_case_list * case_list (void) { return m_list; }
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275
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276 comment_list * leading_comment (void) { return m_lead_comm; }
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277
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278 comment_list * trailing_comment (void) { return m_trail_comm; }
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279
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280 void accept (tree_walker& tw)
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281 {
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282 tw.visit_switch_command (*this);
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283 }
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284
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285 private:
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286
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287 // Value on which to switch.
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288 tree_expression *m_expr;
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289
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290 // List of cases (case 1, case 2, ..., default)
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291 tree_switch_case_list *m_list;
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292
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293 // Comment preceding SWITCH token.
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294 comment_list *m_lead_comm;
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295
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296 // Comment preceding ENDSWITCH token.
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297 comment_list *m_trail_comm;
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298 };
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299 }
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300
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301 #endif