annotate libinterp/parse-tree/pt-stmt.h @ 27923:bd51beb6205e

update formatting of copyright notices * Use <https://octave.org/copyright/> instead of <https://octave.org/COPYRIGHT.html/>. * For consistency with other comments in the Octave sources, use C++-style comments for copyright blocks in C and C++ files. * Use delimiters above and below copyright blocks that are appropriate for the language used in the file. * Eliminate extra spacing inside copyright blocks. * lex.ll (looks_like_copyright): Also allow newlines and carriage returns before the word "Copyright". * scripts/mk-doc.pl (gethelp): Also skip empty comment lines. * bp-table.cc, type.m: Adjust tests.
author John W. Eaton <jwe@octave.org>
date Wed, 08 Jan 2020 11:59:41 -0500
parents 1891570abac8
children c20b7290c778
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2020 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_stmt_h)
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27 #define octave_pt_stmt_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 class octave_value_list;
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32
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33 #include <deque>
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34
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35 #include "base-list.h"
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36 #include "bp-table.h"
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37 #include "pt.h"
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38 #include "pt-walk.h"
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39
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40 class event_manager;
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41
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42 namespace octave
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43 {
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44 class comment_list;
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45 class tree_command;
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46 class tree_evaluator;
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47 class tree_expression;
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48
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49 // A statement is either a command to execute or an expression to
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50 // evaluate.
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51
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52 class tree_statement : public tree
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53 {
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54 public:
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55
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56 tree_statement (void)
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57 : m_command (nullptr), m_expression (nullptr),
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58 m_comment_list (nullptr) { }
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59
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60 tree_statement (tree_command *c, comment_list *cl)
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61 : m_command (c), m_expression (nullptr), m_comment_list (cl) { }
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62
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63 tree_statement (tree_expression *e, comment_list *cl)
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64 : m_command (nullptr), m_expression (e), m_comment_list (cl) { }
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65
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66 // No copying!
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67
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68 tree_statement (const tree_statement&) = delete;
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69
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70 tree_statement& operator = (const tree_statement&) = delete;
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71
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72 ~tree_statement (void);
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73
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74 void set_print_flag (bool print_flag);
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75
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76 bool print_result (void);
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77
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78 bool is_command (void) const { return m_command != nullptr; }
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79
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80 bool is_expression (void) const { return m_expression != nullptr; }
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81
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82 void set_breakpoint (const std::string& condition);
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83
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84 void delete_breakpoint (void);
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85
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86 bool is_breakpoint (void) const;
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87
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88 bool is_active_breakpoint (tree_evaluator& tw) const;
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89
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90 std::string bp_cond () const;
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91
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92 int line (void) const;
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93 int column (void) const;
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94
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95 void set_location (int l, int c);
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96
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97 void echo_code (const std::string& prefix);
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98
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99 tree_command * command (void) { return m_command; }
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100
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101 tree_expression * expression (void) { return m_expression; }
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102
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103 comment_list * comment_text (void) { return m_comment_list; }
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104
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105 bool is_null_statement (void) const
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106 {
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107 return ! (m_command || m_expression || m_comment_list);
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108 }
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109
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110 bool is_end_of_fcn_or_script (void) const;
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111
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112 bool is_end_of_file (void) const;
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113
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114 // Allow modification of this statement. Note that there is no
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115 // checking. If you use these, are you sure you knwo what you are
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116 // doing?
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117
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118 void set_command (tree_command *c) { m_command = c; }
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119
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120 void set_expression (tree_expression *e) { m_expression = e; }
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121
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122 void accept (tree_walker& tw)
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123 {
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124 tw.visit_statement (*this);
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125 }
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126
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127 private:
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128
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129 // Only one of cmd or expr can be valid at once.
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130
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131 // Command to execute.
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132 tree_command *m_command;
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133
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134 // Expression to evaluate.
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135 tree_expression *m_expression;
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136
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137 // Comment associated with this statement.
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138 comment_list *m_comment_list;
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139 };
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140
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141 // A list of statements to evaluate.
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142
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143 class tree_statement_list : public base_list<tree_statement *>
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144 {
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145 public:
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146
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147 tree_statement_list (void)
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148 : m_function_body (false), m_anon_function_body (false),
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149 m_script_body (false) { }
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150
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151 tree_statement_list (tree_statement *s)
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152 : m_function_body (false), m_anon_function_body (false),
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153 m_script_body (false) { append (s); }
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154
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155 // No copying!
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156
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157 tree_statement_list (const tree_statement_list&) = delete;
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158
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159 tree_statement_list& operator = (const tree_statement_list&) = delete;
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160
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161 ~tree_statement_list (void)
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162 {
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163 while (! empty ())
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164 {
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165 auto p = begin ();
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166 delete *p;
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167 erase (p);
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168 }
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169 }
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170
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171 void mark_as_function_body (void) { m_function_body = true; }
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172
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173 void mark_as_anon_function_body (void) { m_anon_function_body = true; }
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174
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175 void mark_as_script_body (void) { m_script_body = true; }
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176
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177 bool is_function_body (void) const { return m_function_body; }
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178
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179 bool is_anon_function_body (void) const { return m_anon_function_body; }
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180
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181 bool is_script_body (void) const { return m_script_body; }
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182
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183 int set_breakpoint (int line, const std::string& condition);
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184
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185 void delete_breakpoint (int line);
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186
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187 octave_value_list list_breakpoints (void);
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188
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189 std::list<bp_type> breakpoints_and_conds (void);
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190
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191 bp_table::intmap add_breakpoint (event_manager& evmgr,
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192 const std::string& file,
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193 const bp_table::intmap& line,
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194 const std::string& condition);
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195
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196 bp_table::intmap remove_all_breakpoints (event_manager& evmgr,
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197 const std::string& file);
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198
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199 void accept (tree_walker& tw)
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200 {
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201 tw.visit_statement_list (*this);
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202 }
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203
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204 private:
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205
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206 // Does this list of statements make up the body of a function?
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207 bool m_function_body;
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208
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209 // Does this list of statements make up the body of a function?
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210 bool m_anon_function_body;
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211
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212 // Does this list of statements make up the body of a script?
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213 bool m_script_body;
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214 };
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215 }
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216
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217 #endif