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annotate libinterp/parse-tree/pt-eval.h @ 23220:092078913d54

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maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Wed, 22 Feb 2017 12:58:07 -0500
parents ef4d915df748 3ac9f9ecfae5
children c452180ab672
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1 /*
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2
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3 Copyright (C) 2009-2017 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
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9 the Free Software Foundation; either version 3 of the License, or
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10 (at your 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
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License 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_eval_h)
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24 #define octave_pt_eval_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 #include <stack>
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29 #include <string>
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31 #include "comment-list.h"
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32 #include "ovl.h"
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33 #include "pt-walk.h"
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35 namespace octave
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36 {
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37 class tree_expression;
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39 class interpreter;
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41 // How to evaluate the code that the parse trees represent.
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42
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43 class OCTINTERP_API tree_evaluator : public tree_walker
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44 {
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45 public:
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46
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47 typedef void (*decl_elt_init_fcn) (tree_decl_elt&);
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48
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49 tree_evaluator (interpreter *interp_context)
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50 : m_interp_context (interp_context)
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51 { }
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53 // No copying!
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54
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55 tree_evaluator (const tree_evaluator&) = delete;
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56
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57 tree_evaluator& operator = (const tree_evaluator&) = delete;
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58
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59 ~tree_evaluator (void) = default;
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61 void visit_anon_fcn_handle (tree_anon_fcn_handle&);
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63 void visit_argument_list (tree_argument_list&);
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65 void visit_binary_expression (tree_binary_expression&);
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67 void visit_break_command (tree_break_command&);
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69 void visit_colon_expression (tree_colon_expression&);
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71 void visit_continue_command (tree_continue_command&);
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73 void visit_global_command (tree_global_command&);
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74
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75 void visit_persistent_command (tree_persistent_command&);
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76
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77 void visit_decl_elt (tree_decl_elt&);
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79 void visit_decl_init_list (tree_decl_init_list&);
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81 void visit_simple_for_command (tree_simple_for_command&);
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83 void visit_complex_for_command (tree_complex_for_command&);
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85 void visit_octave_user_script (octave_user_script&);
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87 void visit_octave_user_function (octave_user_function&);
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89 void visit_octave_user_function_header (octave_user_function&);
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91 void visit_octave_user_function_trailer (octave_user_function&);
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93 void visit_function_def (tree_function_def&);
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95 void visit_identifier (tree_identifier&);
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96
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97 void visit_if_clause (tree_if_clause&);
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99 void visit_if_command (tree_if_command&);
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100
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101 void visit_if_command_list (tree_if_command_list&);
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103 void visit_index_expression (tree_index_expression&);
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105 void visit_matrix (tree_matrix&);
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106
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107 void visit_cell (tree_cell&);
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108
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109 void visit_multi_assignment (tree_multi_assignment&);
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111 void visit_no_op_command (tree_no_op_command&);
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113 void visit_constant (tree_constant&);
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114
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115 void visit_fcn_handle (tree_fcn_handle&);
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117 void visit_funcall (tree_funcall&);
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119 void visit_parameter_list (tree_parameter_list&);
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121 void visit_postfix_expression (tree_postfix_expression&);
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123 void visit_prefix_expression (tree_prefix_expression&);
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125 void visit_return_command (tree_return_command&);
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127 void visit_return_list (tree_return_list&);
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129 void visit_simple_assignment (tree_simple_assignment&);
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130
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131 void visit_statement (tree_statement&);
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132
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133 void visit_statement_list (tree_statement_list&);
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134
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135 void visit_switch_case (tree_switch_case&);
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136
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137 void visit_switch_case_list (tree_switch_case_list&);
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138
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139 void visit_switch_command (tree_switch_command&);
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140
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141 void visit_try_catch_command (tree_try_catch_command&);
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142
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143 void do_unwind_protect_cleanup_code (tree_statement_list *list);
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144
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145 void visit_unwind_protect_command (tree_unwind_protect_command&);
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146
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147 void visit_while_command (tree_while_command&);
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148
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149 void visit_do_until_command (tree_do_until_command&);
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150
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151 static void reset_debug_state (void);
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152
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153 static bool statement_printing_enabled (void);
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154
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155 // If > 0, stop executing at the (N-1)th stopping point, counting
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156 // from the the current execution point in the current frame.
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157 //
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158 // If < 0, stop executing at the next possible stopping point.
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159 static int dbstep_flag;
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160
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161 // The number of the stack frame we are currently debugging.
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162 static size_t current_frame;
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163
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164 static bool debug_mode;
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165
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166 static bool quiet_breakpoint_flag;
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167
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168 // Possible types of evaluation contexts.
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169 enum stmt_list_type
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170 {
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171 function, // function body
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172 script, // script file
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173 other // command-line input or eval string
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174 };
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175
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176 // The context for the current evaluation.
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177 static stmt_list_type statement_context;
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178
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179 // TRUE means we are evaluating some kind of looping construct.
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180 static bool in_loop_command;
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181
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182 private:
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183
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184 void do_decl_init_list (decl_elt_init_fcn fcn,
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185 tree_decl_init_list *init_list);
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186
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187 void do_breakpoint (tree_statement& stmt) const;
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188
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189 void do_breakpoint (bool is_breakpoint,
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190 bool is_end_of_fcn_or_script = false) const;
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191
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192 virtual octave_value
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193 do_keyboard (const octave_value_list& args = octave_value_list ()) const;
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194
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195 interpreter *m_interp_context;
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196 };
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197 }
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198
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199 // Maximum nesting level for functions, scripts, or sourced files called
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200 // recursively.
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201 extern int Vmax_recursion_depth;
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202
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203 #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS)
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204
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205 OCTAVE_DEPRECATED ("use 'octave::tree_evaluator' instead")
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206 typedef octave::tree_evaluator tree_evaluator;
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207
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208 #endif
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209
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210 #endif