Mercurial > octave
annotate libinterp/parse-tree/parse.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> |
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date | Wed, 08 Jan 2020 11:59:41 -0500 |
parents | 1891570abac8 |
children | c20b7290c778 |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 1993-2020 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 //////////////////////////////////////////////////////////////////////// |
1 | 25 |
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26 #if ! defined (octave_parse_h) |
383 | 27 #define octave_parse_h 1 |
1 | 28 |
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29 #include "octave-config.h" |
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30 |
3021 | 31 #include <cstdio> |
32 | |
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33 #include <deque> |
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34 #include <map> |
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35 #include <memory> |
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36 #include <set> |
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37 #include <string> |
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39 #include "lex.h" |
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40 #include "pt-misc.h" |
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41 #include "symscope.h" |
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42 #include "token.h" |
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43 |
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44 class octave_function; |
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45 class octave_user_function; |
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46 |
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47 namespace octave |
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48 { |
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49 class comment_list; |
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50 class tree; |
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51 class tree_anon_fcn_handle; |
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52 class tree_argument_list; |
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53 class tree_array_list; |
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54 class tree_cell; |
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55 class tree_classdef; |
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56 class tree_classdef_attribute_list; |
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57 class tree_classdef_body; |
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58 class tree_classdef_enum_block; |
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59 class tree_classdef_enum_list; |
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60 class tree_classdef_events_block; |
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61 class tree_classdef_events_list; |
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62 class tree_classdef_methods_block; |
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63 class tree_classdef_methods_list; |
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64 class tree_classdef_properties_block; |
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65 class tree_classdef_property_list; |
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66 class tree_classdef_superclass_list; |
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67 class tree_colon_expression; |
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68 class tree_command; |
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69 class tree_constant; |
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70 class tree_decl_command; |
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71 class tree_decl_init_list; |
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72 class tree_expression; |
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73 class tree_fcn_handle; |
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74 class tree_function_def; |
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75 class tree_identifier; |
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76 class tree_if_clause; |
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77 class tree_if_command; |
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78 class tree_if_command_list; |
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79 class tree_index_expression; |
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80 class tree_matrix; |
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81 class tree_matrix; |
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82 class tree_parameter_list; |
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83 class tree_statement; |
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84 class tree_statement_list; |
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85 class tree_statement_listtree_statement; |
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86 class tree_switch_case; |
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87 class tree_switch_case_list; |
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88 class tree_switch_command; |
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89 } |
3772 | 90 |
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91 #include "ovl.h" |
1 | 92 |
93 // Nonzero means print parser debugging info (-d). | |
4753 | 94 extern int octave_debug; |
1 | 95 |
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96 namespace octave |
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97 { |
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98 class base_parser |
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99 { |
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100 private: |
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101 |
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102 class parent_scope_info |
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103 { |
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104 public: |
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105 |
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106 typedef std::pair<symbol_scope, std::string> value_type; |
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107 |
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108 typedef std::deque<value_type>::iterator iterator; |
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109 typedef std::deque<value_type>::const_iterator const_iterator; |
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110 |
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111 typedef std::deque<value_type>::reverse_iterator reverse_iterator; |
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112 typedef std::deque<value_type>::const_reverse_iterator const_reverse_iterator; |
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113 |
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114 parent_scope_info (void) = default; |
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115 |
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116 parent_scope_info (const parent_scope_info&) = default; |
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117 |
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118 parent_scope_info& operator = (const parent_scope_info&) = default; |
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119 |
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120 ~parent_scope_info (void) = default; |
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121 |
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122 size_t size (void) const; |
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123 |
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124 void push (const value_type& elt); |
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125 |
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126 void push (const symbol_scope& id); |
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127 |
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128 void pop (void); |
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129 |
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130 bool name_ok (const std::string& name); |
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131 |
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132 bool name_current_scope (const std::string& name); |
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133 |
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134 symbol_scope parent_scope (void) const; |
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135 |
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136 std::string parent_name (void) const; |
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137 |
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138 void clear (void); |
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139 |
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140 private: |
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141 |
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142 std::deque<value_type> m_info; |
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143 std::set<std::string> m_all_names; |
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144 }; |
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145 |
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146 public: |
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147 |
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148 base_parser (base_lexer& lxr); |
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149 |
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150 // No copying! |
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151 |
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152 base_parser (const base_parser&) = delete; |
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153 |
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154 base_parser& operator = (const base_parser&) = delete; |
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155 |
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156 ~base_parser (void); |
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157 |
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158 base_lexer& get_lexer (void) const { return m_lexer; } |
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159 |
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160 bool at_end_of_input (void) const { return m_lexer.m_end_of_input; } |
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161 |
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162 void reset (void); |
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163 |
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164 void classdef_object (const std::shared_ptr<tree_classdef>& obj) |
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165 { |
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166 m_classdef_object = obj; |
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167 } |
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168 |
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169 std::shared_ptr<tree_classdef> classdef_object (void) const |
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170 { |
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171 return m_classdef_object; |
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172 } |
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173 |
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174 void statement_list (const std::shared_ptr<tree_statement_list>& lst) |
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175 { |
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176 m_stmt_list = lst; |
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177 } |
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178 |
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179 std::shared_ptr<tree_statement_list> statement_list (void) const |
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180 { |
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181 return m_stmt_list; |
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182 } |
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183 |
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184 void parsing_local_functions (bool flag) |
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185 { |
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186 m_parsing_local_functions = flag; |
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187 } |
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188 |
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189 bool parsing_local_functions (void) const |
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190 { |
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191 return m_parsing_local_functions; |
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192 } |
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193 |
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194 void endfunction_found (bool flag) |
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195 { |
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196 m_endfunction_found = flag; |
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197 } |
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198 |
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199 bool endfunction_found (void) const |
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200 { |
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201 return m_endfunction_found; |
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202 } |
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203 |
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204 // Error mesages for mismatched end tokens. |
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205 void end_token_error (token *tok, token::end_tok_type expected); |
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206 |
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207 // Check to see that end tokens are properly matched. |
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208 bool end_token_ok (token *tok, token::end_tok_type expected); |
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209 |
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210 // Handle pushing symbol table for new function scope. |
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211 bool push_fcn_symtab (void); |
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212 |
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213 // Build a constant. |
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214 tree_constant * make_constant (int op, token *tok_val); |
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215 |
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216 // Build a function handle. |
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217 tree_fcn_handle * make_fcn_handle (token *tok_val); |
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218 |
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219 // Build an anonymous function handle. |
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220 tree_anon_fcn_handle * |
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221 make_anon_fcn_handle (tree_parameter_list *param_list, |
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222 tree_expression * expr, const filepos& at_pos); |
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223 |
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224 // Build a colon expression. |
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225 tree_expression * |
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226 make_colon_expression (tree_expression *base, tree_expression *limit, |
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227 tree_expression *incr = nullptr); |
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228 |
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229 // Build a binary expression. |
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230 tree_expression * |
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231 make_binary_op (int op, tree_expression *op1, token *tok_val, |
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232 tree_expression *op2); |
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233 |
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234 // Build a boolean expression. |
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235 tree_expression * |
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236 make_boolean_op (int op, tree_expression *op1, token *tok_val, |
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237 tree_expression *op2); |
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238 |
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239 // Build a prefix expression. |
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240 tree_expression * |
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241 make_prefix_op (int op, tree_expression *op1, token *tok_val); |
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242 |
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243 // Build a postfix expression. |
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244 tree_expression * |
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245 make_postfix_op (int op, tree_expression *op1, token *tok_val); |
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246 |
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247 // Build an unwind-protect command. |
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248 tree_command * |
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249 make_unwind_command (token *unwind_tok, tree_statement_list *body, |
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250 tree_statement_list *cleanup, token *end_tok, |
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251 comment_list *lc, comment_list *mc); |
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252 |
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253 // Build a try-catch command. |
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254 tree_command * |
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255 make_try_command (token *try_tok, tree_statement_list *body, |
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256 char catch_sep, tree_statement_list *cleanup, |
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257 token *end_tok, comment_list *lc, |
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258 comment_list *mc); |
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259 |
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260 // Build a while command. |
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261 tree_command * |
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262 make_while_command (token *while_tok, tree_expression *expr, |
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263 tree_statement_list *body, token *end_tok, |
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264 comment_list *lc); |
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265 |
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266 // Build a do-until command. |
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267 tree_command * |
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268 make_do_until_command (token *until_tok, tree_statement_list *body, |
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269 tree_expression *expr, comment_list *lc); |
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270 |
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271 // Build a for command. |
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272 tree_command * |
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273 make_for_command (int tok_id, token *for_tok, tree_argument_list *lhs, |
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274 tree_expression *expr, tree_expression *maxproc, |
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275 tree_statement_list *body, token *end_tok, |
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276 comment_list *lc); |
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277 |
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278 // Build a break command. |
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279 tree_command * make_break_command (token *break_tok); |
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280 |
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281 // Build a continue command. |
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282 tree_command * make_continue_command (token *continue_tok); |
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283 |
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284 // Build a return command. |
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285 tree_command * make_return_command (token *return_tok); |
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286 |
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287 // Start an if command. |
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288 tree_if_command_list * |
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289 start_if_command (tree_expression *expr, tree_statement_list *list); |
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290 |
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291 // Finish an if command. |
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292 tree_if_command * |
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293 finish_if_command (token *if_tok, tree_if_command_list *list, |
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294 token *end_tok, comment_list *lc); |
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295 |
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296 // Build an elseif clause. |
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297 tree_if_clause * |
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298 make_elseif_clause (token *elseif_tok, tree_expression *expr, |
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299 tree_statement_list *list, comment_list *lc); |
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300 |
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301 // Finish a switch command. |
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302 tree_switch_command * |
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303 finish_switch_command (token *switch_tok, tree_expression *expr, |
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304 tree_switch_case_list *list, token *end_tok, |
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305 comment_list *lc); |
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306 |
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307 // Build a switch case. |
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308 tree_switch_case * |
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309 make_switch_case (token *case_tok, tree_expression *expr, |
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310 tree_statement_list *list, comment_list *lc); |
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311 |
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312 // Build an assignment to a variable. |
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313 tree_expression * |
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314 make_assign_op (int op, tree_argument_list *lhs, token *eq_tok, |
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315 tree_expression *rhs); |
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316 |
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317 // Define a script. |
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318 void make_script (tree_statement_list *cmds, tree_statement *end_script); |
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319 |
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320 // Handle identifier that is recognized as a function name. |
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321 tree_identifier * |
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322 make_fcn_name (tree_identifier *id); |
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323 |
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324 // Define a function. |
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325 tree_function_def * |
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326 make_function (token *fcn_tok, tree_parameter_list *ret_list, |
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327 tree_identifier *id, tree_parameter_list *param_list, |
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328 tree_statement_list *body, tree_statement *end_fcn_stmt, |
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329 comment_list *lc); |
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330 |
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331 // Begin defining a function. |
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332 octave_user_function * |
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333 start_function (tree_identifier *id, tree_parameter_list *param_list, |
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334 tree_statement_list *body, tree_statement *end_function); |
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335 |
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336 // Create a no-op statement for end_function. |
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337 tree_statement * make_end (const std::string& type, bool eof, |
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338 const filepos& beg_pos, const filepos& end_pos); |
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339 |
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340 // Do most of the work for defining a function. |
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341 octave_user_function * |
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342 frob_function (tree_identifier *id, octave_user_function *fcn); |
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343 |
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344 // Finish defining a function. |
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345 tree_function_def * |
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346 finish_function (tree_parameter_list *ret_list, |
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347 octave_user_function *fcn, comment_list *lc, |
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348 int l, int c); |
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349 |
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350 // Reset state after parsing function. |
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351 void |
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352 recover_from_parsing_function (void); |
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353 |
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354 tree_classdef * |
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355 make_classdef (token *tok_val, tree_classdef_attribute_list *a, |
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356 tree_identifier *id, tree_classdef_superclass_list *sc, |
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357 tree_classdef_body *body, token *end_tok, |
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358 comment_list *lc); |
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359 |
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360 tree_classdef_properties_block * |
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361 make_classdef_properties_block (token *tok_val, |
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362 tree_classdef_attribute_list *a, |
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363 tree_classdef_property_list *plist, |
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364 token *end_tok, comment_list *lc); |
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365 |
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366 tree_classdef_methods_block * |
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367 make_classdef_methods_block (token *tok_val, |
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368 tree_classdef_attribute_list *a, |
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369 tree_classdef_methods_list *mlist, |
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370 token *end_tok, comment_list *lc); |
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371 |
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372 tree_classdef_events_block * |
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373 make_classdef_events_block (token *tok_val, |
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374 tree_classdef_attribute_list *a, |
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375 tree_classdef_events_list *elist, |
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376 token *end_tok, comment_list *lc); |
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377 |
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378 tree_classdef_enum_block * |
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379 make_classdef_enum_block (token *tok_val, |
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380 tree_classdef_attribute_list *a, |
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381 tree_classdef_enum_list *elist, |
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382 token *end_tok, comment_list *lc); |
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383 |
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384 octave_user_function * |
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385 start_classdef_external_method (tree_identifier *id, |
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386 tree_parameter_list *pl); |
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387 |
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388 tree_function_def * |
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389 finish_classdef_external_method (octave_user_function *fcn, |
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390 tree_parameter_list *ret_list, |
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391 comment_list *cl); |
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392 |
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393 void |
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394 finish_classdef_file (tree_classdef *cls, |
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395 tree_statement_list *local_fcns); |
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396 |
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397 // Make an index expression. |
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398 tree_index_expression * |
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399 make_index_expression (tree_expression *expr, |
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400 tree_argument_list *args, char type); |
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401 |
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402 // Make an indirect reference expression. |
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403 tree_index_expression * |
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404 make_indirect_ref (tree_expression *expr, const std::string&); |
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405 |
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406 // Make an indirect reference expression with dynamic field name. |
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407 tree_index_expression * |
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408 make_indirect_ref (tree_expression *expr, tree_expression *field); |
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409 |
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410 // Make a declaration command. |
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411 tree_decl_command * |
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412 make_decl_command (int tok, token *tok_val, tree_decl_init_list *lst); |
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413 |
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414 // Validate an function parameter list. |
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415 bool validate_param_list (tree_parameter_list *lst, |
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416 tree_parameter_list::in_or_out type); |
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417 // Validate matrix or cell |
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418 bool validate_array_list (tree_expression *e); |
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419 |
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420 // Validate matrix object used in "[lhs] = ..." assignments. |
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421 tree_argument_list * validate_matrix_for_assignment (tree_expression *e); |
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422 |
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423 // Finish building an array_list (common action for finish_matrix |
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424 // and finish_cell). |
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425 tree_expression * finish_array_list (tree_array_list *a, token *open_delim, |
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426 token *close_delim); |
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427 |
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428 // Finish building a matrix list. |
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429 tree_expression * finish_matrix (tree_matrix *m, token *open_delim, |
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430 token *close_delim); |
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431 |
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432 // Finish building a cell list. |
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433 tree_expression * finish_cell (tree_cell *c, token *open_delim, |
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434 token *close_delim); |
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435 |
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436 // Set the print flag for a statement based on the separator type. |
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437 tree_statement_list * |
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438 set_stmt_print_flag (tree_statement_list *, char, bool); |
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439 |
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440 // Finish building a statement. |
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441 template <typename T> |
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442 tree_statement * make_statement (T *arg); |
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443 |
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444 // Create a statement list. |
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445 tree_statement_list * make_statement_list (tree_statement *stmt); |
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446 |
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447 // Append a statement to an existing statement list. |
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448 tree_statement_list * |
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449 append_statement_list (tree_statement_list *list, char sep, |
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450 tree_statement *stmt, bool warn_missing_semi); |
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451 |
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452 // Don't allow parsing command syntax. If the parser/lexer is |
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453 // reset, this setting is also reset to the default (allow command |
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454 // syntax). |
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455 void disallow_command_syntax (void); |
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456 |
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457 // Generic error messages. |
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458 void bison_error (const std::string& s); |
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459 void bison_error (const std::string& s, const filepos& pos); |
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460 void bison_error (const std::string& s, int line, int column); |
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461 |
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462 friend octave_value |
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463 parse_fcn_file (interpreter& interp, const std::string& full_file, |
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464 const std::string& file, const std::string& dir_name, |
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465 const std::string& dispatch_type, |
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466 const std::string& package_name, bool require_file, |
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467 bool force_script, bool autoload, bool relative_lookup); |
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468 |
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469 protected: |
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470 |
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471 // Contains error message if Bison-generated parser returns non-zero |
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472 // status. |
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473 std::string m_parse_error_msg; |
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474 |
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475 // Have we found an explicit end to a function? |
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476 bool m_endfunction_found; |
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477 |
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478 // TRUE means we are in the process of autoloading a function. |
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479 bool m_autoloading; |
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480 |
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481 // TRUE means the current function file was found in a relative path |
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482 // element. |
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483 bool m_fcn_file_from_relative_lookup; |
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484 |
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485 // FALSE if we are still at the primary function. Subfunctions can |
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486 // only be declared inside function files. |
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487 bool m_parsing_subfunctions; |
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488 |
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489 // TRUE if we are parsing local functions defined at after a |
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490 // classdef block. Local functions can only be declared inside |
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491 // classdef files. |
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492 bool m_parsing_local_functions; |
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493 |
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494 // Maximum function depth detected. Used to determine whether |
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495 // we have nested functions or just implicitly ended subfunctions. |
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496 int m_max_fcn_depth; |
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497 |
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498 // = 0 currently outside any function. |
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499 // = 1 inside the primary function or a subfunction. |
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500 // > 1 means we are looking at a function definition that seems to be |
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501 // inside a function. Note that the function still might not be a |
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502 // nested function. |
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503 int m_curr_fcn_depth; |
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504 |
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505 // Scope where we install all subfunctions and nested functions. Only |
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506 // used while reading function files. |
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507 symbol_scope m_primary_fcn_scope; |
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508 |
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509 // Name of the current class when we are parsing class methods or |
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510 // constructors. |
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511 std::string m_curr_class_name; |
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512 |
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513 // Name of the current package when we are parsing an element contained |
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514 // in a package directory (+-directory). |
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515 std::string m_curr_package_name; |
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516 |
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517 // Nested function scopes and names currently being parsed. |
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518 parent_scope_info m_function_scopes; |
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519 |
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520 // Pointer to the primary user function or user script function. |
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521 octave_value m_primary_fcn; |
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522 |
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523 // List of subfunction names, initially in the order they are |
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524 // installed in the symbol table, then ordered as they appear in the |
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525 // file. Eventually stashed in the primary function object. |
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526 std::list<std::string> m_subfunction_names; |
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527 |
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528 // Pointer to the classdef object we just parsed, if any. |
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529 std::shared_ptr<tree_classdef> m_classdef_object; |
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530 |
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531 // Result of parsing input. |
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532 std::shared_ptr <tree_statement_list> m_stmt_list; |
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533 |
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534 // State of the lexer. |
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535 base_lexer& m_lexer; |
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536 |
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537 // Internal state of the Bison parser. |
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538 void *m_parser_state; |
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539 |
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540 private: |
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541 |
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542 // Maybe print a warning if an assignment expression is used as the |
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543 // test in a logical expression. |
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544 void maybe_warn_assign_as_truth_value (tree_expression *expr); |
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545 |
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546 // Maybe print a warning about switch labels that aren't constants. |
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547 void maybe_warn_variable_switch_label (tree_expression *expr); |
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548 |
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549 // Maybe print a warning. |
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550 void maybe_warn_missing_semi (tree_statement_list *); |
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551 }; |
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552 |
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553 // Publish externally used friend functions. |
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554 |
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555 extern OCTAVE_API octave_value |
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556 parse_fcn_file (interpreter& interp, const std::string& full_file, |
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557 const std::string& file, const std::string& dir_name, |
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558 const std::string& dispatch_type, |
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559 const std::string& package_name, bool require_file, |
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560 bool force_script, bool autoload, bool relative_lookup); |
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561 |
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562 class parser : public base_parser |
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563 { |
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564 public: |
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565 |
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566 parser (interpreter& interp) |
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567 : base_parser (*(new lexer (interp))) |
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568 { } |
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569 |
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570 parser (FILE *file, interpreter& interp) |
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571 : base_parser (*(new lexer (file, interp))) |
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572 { } |
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573 |
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574 parser (const std::string& eval_string, interpreter& interp) |
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575 : base_parser (*(new lexer (eval_string, interp))) |
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576 { } |
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577 |
26512
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578 // The lexer must be allocated with new. The parser object |
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579 // takes ownership of and deletes the lexer object in its |
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580 // destructor. |
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581 |
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582 parser (lexer *lxr) |
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583 : base_parser (*lxr) |
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584 { } |
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585 |
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586 // No copying! |
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587 |
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588 parser (const parser&) = delete; |
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589 |
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590 parser& operator = (const parser&) = delete; |
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591 |
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592 ~parser (void) = default; |
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593 |
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594 int run (void); |
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595 }; |
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596 |
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597 class push_parser : public base_parser |
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598 { |
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599 public: |
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600 |
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601 push_parser (interpreter& interp) |
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602 : base_parser (*(new push_lexer (interp))) |
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603 { } |
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604 |
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605 // No copying! |
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606 |
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607 push_parser (const push_parser&) = delete; |
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608 |
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609 push_parser& operator = (const push_parser&) = delete; |
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610 |
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611 ~push_parser (void) = default; |
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612 |
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613 int run (const std::string& input, bool eof); |
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614 }; |
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615 |
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616 extern OCTINTERP_API std::string |
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617 get_help_from_file (const std::string& nm, bool& symbol_found, |
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618 std::string& file); |
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619 |
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620 extern OCTINTERP_API std::string |
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621 get_help_from_file (const std::string& nm, bool& symbol_found); |
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622 |
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623 extern OCTINTERP_API octave_value |
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624 load_fcn_from_file (const std::string& file_name, |
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625 const std::string& dir_name = "", |
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626 const std::string& dispatch_type = "", |
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627 const std::string& package_name = "", |
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628 const std::string& fcn_name = "", |
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629 bool autoload = false); |
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630 |
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631 extern OCTINTERP_API void |
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632 source_file (const std::string& file_name, |
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633 const std::string& context = "", |
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634 bool verbose = false, bool require_file = true); |
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635 |
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636 extern OCTINTERP_API octave_value_list |
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637 feval (const char *name, |
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638 const octave_value_list& args = octave_value_list (), |
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639 int nargout = 0); |
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640 |
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641 extern OCTINTERP_API octave_value_list |
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642 feval (const std::string& name, |
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643 const octave_value_list& args = octave_value_list (), |
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644 int nargout = 0); |
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645 |
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646 extern OCTINTERP_API octave_value_list |
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647 feval (octave_function *fcn, |
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648 const octave_value_list& args = octave_value_list (), |
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649 int nargout = 0); |
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650 |
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651 extern OCTINTERP_API octave_value_list |
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652 feval (const octave_value& val, |
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653 const octave_value_list& args = octave_value_list (), |
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654 int nargout = 0); |
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655 |
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656 extern OCTINTERP_API octave_value_list |
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657 feval (const octave_value_list& args, int nargout = 0); |
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658 |
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659 OCTAVE_DEPRECATED (5, "use 'octave::interpreter::eval_string' instead") |
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660 extern OCTINTERP_API octave_value_list |
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661 eval_string (const std::string&, bool silent, int& parse_status, int nargout); |
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662 |
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663 OCTAVE_DEPRECATED (5, "use 'octave::interpreter::eval_string' instead") |
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664 extern OCTINTERP_API octave_value |
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665 eval_string (const std::string&, bool silent, int& parse_status); |
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666 |
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667 extern OCTINTERP_API void |
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668 cleanup_statement_list (tree_statement_list **lst); |
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669 } |
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670 |
1 | 671 #endif |