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annotate libinterp/parse-tree/pt-stmt.h @ 23083:e9a0469dedd9 stable

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maint: strip extra trailing newlines from files.
author John W. Eaton <jwe@octave.org>
date Fri, 20 Jan 2017 12:19:08 -0500
parents 34ce5be04942
children ef4d915df748 3ac9f9ecfae5
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1 /*
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2
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3 Copyright (C) 1996-2016 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
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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 #if ! defined (octave_pt_stmt_h)
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24 #define octave_pt_stmt_h 1
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25
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26 #include "octave-config.h"
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27
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28 class octave_value_list;
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29
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30 class tree_command;
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31 class tree_expression;
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32
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33 class tree_walker;
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34
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35 #include <deque>
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36
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37 #include "base-list.h"
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38 #include "comment-list.h"
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39 #include "debug.h"
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40 #include "symtab.h"
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41 #include "pt.h"
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42
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43 // A statement is either a command to execute or an expression to
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44 // evaluate.
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45
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46 class
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47 tree_statement : public tree
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48 {
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49 public:
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50
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51 tree_statement (void)
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52 : cmd (0), expr (0), comm (0) { }
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53
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54 tree_statement (tree_command *c, octave_comment_list *cl)
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55 : cmd (c), expr (0), comm (cl) { }
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56
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57 tree_statement (tree_expression *e, octave_comment_list *cl)
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58 : cmd (0), expr (e), comm (cl) { }
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59
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60 ~tree_statement (void);
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61
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62 void set_print_flag (bool print_flag);
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63
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64 bool print_result (void);
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65
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66 bool is_command (void) const { return cmd != 0; }
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67
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68 bool is_expression (void) const { return expr != 0; }
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69
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70 void set_breakpoint (const std::string& condition);
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71
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72 void delete_breakpoint (void);
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73
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74 bool is_breakpoint (bool check_valid = false) const;
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75 std::string bp_cond () const;
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76
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77 int line (void) const;
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78 int column (void) const;
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79
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80 void set_location (int l, int c);
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81
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82 void echo_code (void);
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83
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84 tree_command *command (void) { return cmd; }
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85
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86 tree_expression *expression (void) { return expr; }
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87
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88 octave_comment_list *comment_text (void) { return comm; }
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89
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90 bool is_null_statement (void) const { return ! (cmd || expr || comm); }
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91
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92 bool is_end_of_fcn_or_script (void) const;
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93
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94 bool is_end_of_file (void) const;
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95
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96 // Allow modification of this statement. Note that there is no
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97 // checking. If you use these, are you sure you knwo what you are
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98 // doing?
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99
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100 void set_command (tree_command *c) { cmd = c; }
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101
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102 void set_expression (tree_expression *e) { expr = e; }
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103
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104 tree_statement *dup (symbol_table::scope_id scope,
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105 symbol_table::context_id context) const;
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106
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107 void accept (tree_walker& tw);
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108
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109 private:
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110
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111 // Only one of cmd or expr can be valid at once.
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112
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113 // Command to execute.
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114 tree_command *cmd;
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115
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116 // Expression to evaluate.
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117 tree_expression *expr;
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118
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119 // Comment associated with this statement.
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120 octave_comment_list *comm;
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121
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122 // No copying!
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123 tree_statement (const tree_statement&);
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124
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125 tree_statement& operator = (const tree_statement&);
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126 };
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127
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128 // A list of statements to evaluate.
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129
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130 class
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131 tree_statement_list : public octave::base_list<tree_statement *>
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132 {
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133 public:
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134
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135 tree_statement_list (void)
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136 : function_body (false), anon_function_body (false),
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137 script_body (false) { }
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138
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139 tree_statement_list (tree_statement *s)
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140 : function_body (false), anon_function_body (false),
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141 script_body (false) { append (s); }
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142
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143 ~tree_statement_list (void)
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144 {
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145 while (! empty ())
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146 {
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147 iterator p = begin ();
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148 delete *p;
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149 erase (p);
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150 }
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151 }
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152
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153 void mark_as_function_body (void) { function_body = true; }
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154
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155 void mark_as_anon_function_body (void) { anon_function_body = true; }
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156
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157 void mark_as_script_body (void) { script_body = true; }
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158
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159 bool is_function_body (void) const { return function_body; }
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160
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161 bool is_anon_function_body (void) const { return anon_function_body; }
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162
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163 bool is_script_body (void) const { return script_body; }
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164
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165 int set_breakpoint (int line, const std::string& condition);
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166
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167 void delete_breakpoint (int line);
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168
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169 octave_value_list list_breakpoints (void);
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170
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171 std::list<bp_type> breakpoints_and_conds (void);
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172
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173 bp_table::intmap add_breakpoint (const std::string& file,
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174 const bp_table::intmap& line,
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175 const std::string& condition);
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176
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177 bp_table::intmap remove_all_breakpoints (const std::string& file);
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178
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179 tree_statement_list *dup (symbol_table::scope_id scope,
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180 symbol_table::context_id context) const;
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181
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182 void accept (tree_walker& tw);
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183
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184 private:
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185
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186 // Does this list of statements make up the body of a function?
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187 bool function_body;
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188
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189 // Does this list of statements make up the body of a function?
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190 bool anon_function_body;
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191
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192 // Does this list of statements make up the body of a script?
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193 bool script_body;
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194
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195 // No copying!
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196
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197 tree_statement_list (const tree_statement_list&);
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198
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199 tree_statement_list& operator = (const tree_statement_list&);
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200 };
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201
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202 #endif