Mercurial > octave
annotate libinterp/parse-tree/parse.h @ 23653:3bb0a937c071
avoid possible memory errors when parsing function files
* ov-builtin.h (octave_builtin::call): Provide default values for
nargout and args in declaration.
* ov-mex-fcn.h (octave_mex_function::call): Likewise.
* ov-usr-fcn.h (octave_user_function::call): Likewise.
* parse.h, oct-parse.in.yy (parse_fcn_file, load_fcn_from_file):
Return octave_value object instead of raw pointer to octave_function.
Change all uses.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 20 Jun 2017 06:57:59 -0400 |
parents | be7b884ac589 |
children | da89ce0d49eb |
rev | line source |
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1 | 1 /* |
2 | |
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3 Copyright (C) 1993-2017 John W. Eaton |
1 | 4 |
5 This file is part of Octave. | |
6 | |
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. |
1 | 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. |
1 | 16 |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
1 | 20 |
21 */ | |
22 | |
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23 #if ! defined (octave_parse_h) |
383 | 24 #define octave_parse_h 1 |
1 | 25 |
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26 #include "octave-config.h" |
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27 |
3021 | 28 #include <cstdio> |
29 | |
1755 | 30 #include <string> |
31 | |
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32 #include <deque> |
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33 #include <map> |
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34 #include <set> |
4426 | 35 |
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36 #include "lex.h" |
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37 #include "symtab.h" |
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38 #include "token.h" |
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39 |
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40 class octave_comment_list; |
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41 class octave_function; |
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42 class octave_user_function; |
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43 |
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44 namespace octave |
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45 { |
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46 class tree; |
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47 class tree_anon_fcn_handle; |
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48 class tree_argument_list; |
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49 class tree_array_list; |
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50 class tree_cell; |
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51 class tree_classdef; |
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52 class tree_classdef_attribute_list; |
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53 class tree_classdef_body; |
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54 class tree_classdef_enum_block; |
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55 class tree_classdef_enum_list; |
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56 class tree_classdef_events_block; |
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57 class tree_classdef_events_list; |
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58 class tree_classdef_methods_block; |
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59 class tree_classdef_methods_list; |
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60 class tree_classdef_properties_block; |
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61 class tree_classdef_property_list; |
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62 class tree_classdef_superclass_list; |
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63 class tree_colon_expression; |
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64 class tree_command; |
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65 class tree_constant; |
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66 class tree_decl_command; |
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67 class tree_decl_init_list; |
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68 class tree_expression; |
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69 class tree_fcn_handle; |
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70 class tree_funcall; |
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71 class tree_function_def; |
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72 class tree_identifier; |
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73 class tree_if_clause; |
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74 class tree_if_command; |
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75 class tree_if_command_list; |
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76 class tree_index_expression; |
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77 class tree_matrix; |
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78 class tree_matrix; |
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79 class tree_parameter_list; |
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80 class tree_statement; |
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81 class tree_statement_list; |
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82 class tree_statement_listtree_statement; |
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83 class tree_switch_case; |
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84 class tree_switch_case_list; |
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85 class tree_switch_command; |
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86 } |
3772 | 87 |
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88 #include "ovl.h" |
1 | 89 |
90 // Nonzero means print parser debugging info (-d). | |
4753 | 91 extern int octave_debug; |
1 | 92 |
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93 namespace octave |
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94 { |
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95 class |
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96 base_parser |
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97 { |
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98 private: |
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99 |
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100 class parent_scope_info |
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101 { |
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102 public: |
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103 |
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104 typedef std::pair<symbol_table::scope*, std::string> value_type; |
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105 |
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106 typedef std::deque<value_type>::iterator iterator; |
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107 typedef std::deque<value_type>::const_iterator const_iterator; |
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108 |
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109 typedef std::deque<value_type>::reverse_iterator reverse_iterator; |
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110 typedef std::deque<value_type>::const_reverse_iterator const_reverse_iterator; |
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111 |
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112 parent_scope_info (void) = default; |
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113 |
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114 parent_scope_info (const parent_scope_info&) = default; |
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115 |
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116 parent_scope_info& operator = (const parent_scope_info&) = default; |
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117 |
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118 ~parent_scope_info (void) = default; |
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119 |
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120 size_t size (void) const; |
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121 |
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122 void push (const value_type& elt); |
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123 |
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124 void push (symbol_table::scope *id); |
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125 |
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126 void pop (void); |
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127 |
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128 bool name_ok (const std::string& name); |
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129 |
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130 bool name_current_scope (const std::string& name); |
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131 |
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132 symbol_table::scope *parent_scope (void) const; |
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133 |
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134 std::string parent_name (void) const; |
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135 |
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136 void clear (void); |
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137 |
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138 private: |
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139 |
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140 std::deque<value_type> info; |
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141 std::set<std::string> all_names; |
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142 }; |
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143 |
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144 public: |
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145 |
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146 base_parser (base_lexer& lxr); |
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147 |
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148 // No copying! |
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149 |
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150 base_parser (const base_parser&) = delete; |
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151 |
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152 base_parser& operator = (const base_parser&) = delete; |
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153 |
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154 ~base_parser (void); |
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155 |
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156 void reset (void); |
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157 |
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158 // Error mesages for mismatched end tokens. |
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159 void end_token_error (token *tok, token::end_tok_type expected); |
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160 |
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161 // Check to see that end tokens are properly matched. |
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162 bool end_token_ok (token *tok, token::end_tok_type expected); |
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163 |
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164 // Maybe print a warning if an assignment expression is used as the |
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165 // test in a logical expression. |
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166 void maybe_warn_assign_as_truth_value (tree_expression *expr); |
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167 |
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168 // Maybe print a warning about switch labels that aren't constants. |
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169 void maybe_warn_variable_switch_label (tree_expression *expr); |
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170 |
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171 // Finish building a range. |
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172 tree_expression * finish_colon_expression (tree_colon_expression *e); |
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173 |
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174 // Build a constant. |
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175 tree_constant * make_constant (int op, token *tok_val); |
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176 |
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177 // Build a function handle. |
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178 tree_fcn_handle * make_fcn_handle (token *tok_val); |
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179 |
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180 // Build an anonymous function handle. |
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181 tree_anon_fcn_handle * |
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182 make_anon_fcn_handle (tree_parameter_list *param_list, |
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183 tree_expression * expr); |
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184 |
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185 // Build a binary expression. |
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186 tree_expression * |
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187 make_binary_op (int op, tree_expression *op1, token *tok_val, |
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188 tree_expression *op2); |
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189 |
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190 // Build a boolean expression. |
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191 tree_expression * |
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192 make_boolean_op (int op, tree_expression *op1, token *tok_val, |
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193 tree_expression *op2); |
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194 |
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195 // Build a prefix expression. |
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196 tree_expression * |
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197 make_prefix_op (int op, tree_expression *op1, token *tok_val); |
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198 |
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199 // Build a postfix expression. |
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200 tree_expression * |
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201 make_postfix_op (int op, tree_expression *op1, token *tok_val); |
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202 |
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203 // Build an unwind-protect command. |
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204 tree_command * |
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205 make_unwind_command (token *unwind_tok, tree_statement_list *body, |
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206 tree_statement_list *cleanup, token *end_tok, |
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207 octave_comment_list *lc, octave_comment_list *mc); |
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208 |
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209 // Build a try-catch command. |
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210 tree_command * |
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211 make_try_command (token *try_tok, tree_statement_list *body, |
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212 char catch_sep, tree_statement_list *cleanup, |
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213 token *end_tok, octave_comment_list *lc, |
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214 octave_comment_list *mc); |
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215 |
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216 // Build a while command. |
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217 tree_command * |
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218 make_while_command (token *while_tok, tree_expression *expr, |
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219 tree_statement_list *body, token *end_tok, |
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220 octave_comment_list *lc); |
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221 |
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222 // Build a do-until command. |
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223 tree_command * |
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224 make_do_until_command (token *until_tok, tree_statement_list *body, |
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225 tree_expression *expr, octave_comment_list *lc); |
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226 |
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227 // Build a for command. |
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228 tree_command * |
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229 make_for_command (int tok_id, token *for_tok, tree_argument_list *lhs, |
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230 tree_expression *expr, tree_expression *maxproc, |
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231 tree_statement_list *body, token *end_tok, |
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232 octave_comment_list *lc); |
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233 |
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234 // Build a break command. |
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235 tree_command * make_break_command (token *break_tok); |
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236 |
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237 // Build a continue command. |
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238 tree_command * make_continue_command (token *continue_tok); |
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239 |
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240 // Build a return command. |
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241 tree_command * make_return_command (token *return_tok); |
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242 |
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243 // Start an if command. |
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244 tree_if_command_list * |
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245 start_if_command (tree_expression *expr, tree_statement_list *list); |
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246 |
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247 // Finish an if command. |
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248 tree_if_command * |
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249 finish_if_command (token *if_tok, tree_if_command_list *list, |
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250 token *end_tok, octave_comment_list *lc); |
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251 |
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252 // Build an elseif clause. |
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253 tree_if_clause * |
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254 make_elseif_clause (token *elseif_tok, tree_expression *expr, |
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255 tree_statement_list *list, octave_comment_list *lc); |
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256 |
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257 // Finish a switch command. |
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258 tree_switch_command * |
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259 finish_switch_command (token *switch_tok, tree_expression *expr, |
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260 tree_switch_case_list *list, token *end_tok, |
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261 octave_comment_list *lc); |
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262 |
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263 // Build a switch case. |
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264 tree_switch_case * |
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265 make_switch_case (token *case_tok, tree_expression *expr, |
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266 tree_statement_list *list, octave_comment_list *lc); |
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267 |
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268 // Build an assignment to a variable. |
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269 tree_expression * |
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270 make_assign_op (int op, tree_argument_list *lhs, token *eq_tok, |
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271 tree_expression *rhs); |
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272 |
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273 // Define a script. |
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274 void make_script (tree_statement_list *cmds, tree_statement *end_script); |
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275 |
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276 // Begin defining a function. |
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277 octave_user_function * |
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278 start_function (tree_parameter_list *param_list, tree_statement_list *body, |
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279 tree_statement *end_function); |
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280 |
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281 // Create a no-op statement for end_function. |
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282 tree_statement * make_end (const std::string& type, bool eof, int l, int c); |
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283 |
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284 // Do most of the work for defining a function. |
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285 octave_user_function * |
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286 frob_function (const std::string& fname, octave_user_function *fcn); |
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287 |
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288 // Finish defining a function. |
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289 tree_function_def * |
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290 finish_function (tree_parameter_list *ret_list, |
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291 octave_user_function *fcn, octave_comment_list *lc, |
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292 int l, int c); |
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293 |
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294 // Reset state after parsing function. |
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295 void |
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296 recover_from_parsing_function (void); |
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297 |
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298 tree_funcall * |
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299 make_superclass_ref (const std::string& method_nm, |
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300 const std::string& class_nm); |
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301 |
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302 tree_funcall * |
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303 make_meta_class_query (const std::string& class_nm); |
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304 |
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305 tree_classdef * |
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306 make_classdef (token *tok_val, tree_classdef_attribute_list *a, |
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307 tree_identifier *id, tree_classdef_superclass_list *sc, |
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308 tree_classdef_body *body, token *end_tok, |
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309 octave_comment_list *lc); |
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310 |
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311 tree_classdef_properties_block * |
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312 make_classdef_properties_block (token *tok_val, |
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313 tree_classdef_attribute_list *a, |
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314 tree_classdef_property_list *plist, |
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315 token *end_tok, octave_comment_list *lc); |
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316 |
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317 tree_classdef_methods_block * |
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318 make_classdef_methods_block (token *tok_val, |
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319 tree_classdef_attribute_list *a, |
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320 tree_classdef_methods_list *mlist, |
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321 token *end_tok, octave_comment_list *lc); |
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322 |
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323 tree_classdef_events_block * |
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324 make_classdef_events_block (token *tok_val, |
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325 tree_classdef_attribute_list *a, |
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326 tree_classdef_events_list *elist, |
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327 token *end_tok, octave_comment_list *lc); |
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328 |
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329 tree_classdef_enum_block * |
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330 make_classdef_enum_block (token *tok_val, |
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331 tree_classdef_attribute_list *a, |
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332 tree_classdef_enum_list *elist, |
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333 token *end_tok, octave_comment_list *lc); |
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334 |
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335 octave_user_function * |
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336 start_classdef_external_method (tree_identifier *id, |
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337 tree_parameter_list *pl); |
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338 |
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339 tree_function_def * |
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340 finish_classdef_external_method (octave_user_function *fcn, |
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341 tree_parameter_list *ret_list, |
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342 octave_comment_list *cl); |
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343 |
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344 // Make an index expression. |
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345 tree_index_expression * |
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346 make_index_expression (tree_expression *expr, |
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347 tree_argument_list *args, char type); |
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348 |
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349 // Make an indirect reference expression. |
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350 tree_index_expression * |
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351 make_indirect_ref (tree_expression *expr, const std::string&); |
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352 |
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353 // Make an indirect reference expression with dynamic field name. |
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354 tree_index_expression * |
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355 make_indirect_ref (tree_expression *expr, tree_expression *field); |
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356 |
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357 // Make a declaration command. |
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358 tree_decl_command * |
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359 make_decl_command (int tok, token *tok_val, tree_decl_init_list *lst); |
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360 |
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361 // Validate matrix or cell |
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362 bool validate_array_list (tree_expression *e); |
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363 |
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364 // Validate matrix object used in "[lhs] = ..." assignments. |
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365 tree_argument_list * validate_matrix_for_assignment (tree_expression *e); |
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366 |
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367 // Finish building an array_list (common action for finish_matrix |
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368 // and finish_cell). |
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369 tree_expression * finish_array_list (tree_array_list *a); |
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370 |
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371 // Finish building a matrix list. |
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372 tree_expression * finish_matrix (tree_matrix *m); |
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373 |
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374 // Finish building a cell list. |
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375 tree_expression * finish_cell (tree_cell *c); |
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376 |
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377 // Maybe print a warning. Duh. |
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378 void maybe_warn_missing_semi (tree_statement_list *); |
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379 |
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380 // Set the print flag for a statement based on the separator type. |
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381 tree_statement_list * |
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382 set_stmt_print_flag (tree_statement_list *, char, bool); |
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383 |
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384 // Finish building a statement. |
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385 template <typename T> |
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386 tree_statement * make_statement (T *arg); |
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387 |
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388 // Create a statement list. |
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389 tree_statement_list * make_statement_list (tree_statement *stmt); |
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390 |
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391 // Append a statement to an existing statement list. |
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392 tree_statement_list * |
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393 append_statement_list (tree_statement_list *list, char sep, |
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394 tree_statement *stmt, bool warn_missing_semi); |
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395 |
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396 // Generic error messages. |
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397 void bison_error (const std::string& s, int l = -1, int c = -1); |
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398 |
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399 // Contains error message if Bison-generated parser returns non-zero |
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400 // status. |
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401 std::string parse_error_msg; |
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402 |
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403 // Have we found an explicit end to a function? |
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404 bool endfunction_found; |
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405 |
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406 // TRUE means we are in the process of autoloading a function. |
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407 bool autoloading; |
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408 |
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409 // TRUE means the current function file was found in a relative path |
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410 // element. |
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411 bool fcn_file_from_relative_lookup; |
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412 |
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413 // FALSE if we are still at the primary function. Subfunctions can |
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414 // only be declared inside function files. |
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415 bool parsing_subfunctions; |
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416 |
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417 // TRUE if we are parsing local functions defined at after a |
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418 // classdef block. Local functions can only be declared inside |
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419 // classdef files. |
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420 bool parsing_local_functions; |
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421 |
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422 // Maximum function depth detected. Used to determine whether |
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423 // we have nested functions or just implicitly ended subfunctions. |
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424 int max_fcn_depth; |
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425 |
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426 // = 0 currently outside any function. |
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427 // = 1 inside the primary function or a subfunction. |
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428 // > 1 means we are looking at a function definition that seems to be |
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429 // inside a function. Note that the function still might not be a |
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430 // nested function. |
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431 int curr_fcn_depth; |
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432 |
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433 // Scope where we install all subfunctions and nested functions. Only |
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434 // used while reading function files. |
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435 symbol_table::scope *primary_fcn_scope; |
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436 |
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437 // Name of the current class when we are parsing class methods or |
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438 // constructors. |
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439 std::string curr_class_name; |
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440 |
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441 // Name of the current package when we are parsing an element contained |
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442 // in a package directory (+-directory). |
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443 std::string curr_package_name; |
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444 |
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445 // Nested function scopes and names currently being parsed. |
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446 parent_scope_info function_scopes; |
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447 |
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448 // Pointer to the primary user function or user script function. |
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449 octave_function *primary_fcn_ptr; |
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450 |
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451 // List of subfunction names, initially in the order they are |
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452 // installed in the symbol table, then ordered as they appear in the |
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453 // file. Eventually stashed in the primary function object. |
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454 std::list<std::string> subfunction_names; |
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455 |
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456 // Pointer to the classdef object we just parsed, if any. |
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457 tree_classdef *classdef_object; |
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458 |
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459 // Result of parsing input. |
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460 tree_statement_list *stmt_list; |
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461 |
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462 // State of the lexer. |
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463 base_lexer& lexer; |
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464 |
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465 // Internal state of the Bison parser. |
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466 void *parser_state; |
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467 }; |
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468 |
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469 class |
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470 parser : public base_parser |
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471 { |
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472 public: |
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473 |
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474 parser (void) |
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475 : base_parser (*(new octave::lexer ())) |
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476 { } |
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477 |
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478 parser (FILE *file) |
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479 : base_parser (*(new octave::lexer (file))) |
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480 { } |
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481 |
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482 parser (const std::string& eval_string) |
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483 : base_parser (*(new octave::lexer (eval_string))) |
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484 { } |
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485 |
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486 parser (octave::lexer& lxr) |
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487 : base_parser (lxr) |
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488 { } |
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489 |
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490 // No copying! |
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491 |
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492 parser (const parser&) = delete; |
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493 |
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494 parser& operator = (const parser&) = delete; |
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495 |
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496 ~parser (void) = default; |
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497 |
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498 int run (void); |
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499 }; |
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500 |
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501 class |
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502 push_parser : public base_parser |
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503 { |
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504 public: |
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505 |
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506 push_parser (void) |
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507 : base_parser (*(new octave::push_lexer ())) |
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508 { } |
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509 |
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510 // No copying! |
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511 |
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512 push_parser (const push_parser&) = delete; |
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513 |
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514 push_parser& operator = (const push_parser&) = delete; |
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515 |
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516 ~push_parser (void) = default; |
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517 |
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518 int run (const std::string& input, bool eof); |
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519 }; |
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520 |
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521 extern OCTINTERP_API std::string |
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522 get_help_from_file (const std::string& nm, bool& symbol_found, |
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523 std::string& file); |
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524 |
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525 extern OCTINTERP_API std::string |
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526 get_help_from_file (const std::string& nm, bool& symbol_found); |
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527 |
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528 extern OCTINTERP_API |
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529 std::string lookup_autoload (const std::string& nm); |
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530 |
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531 extern OCTINTERP_API string_vector |
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532 autoloaded_functions (void); |
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533 |
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534 extern OCTINTERP_API string_vector |
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535 reverse_lookup_autoload (const std::string& nm); |
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536 |
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537 extern OCTINTERP_API octave_value |
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538 load_fcn_from_file (const std::string& file_name, |
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539 const std::string& dir_name = "", |
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540 const std::string& dispatch_type = "", |
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541 const std::string& package_name = "", |
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542 const std::string& fcn_name = "", |
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543 bool autoload = false); |
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544 |
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545 extern OCTINTERP_API void |
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546 source_file (const std::string& file_name, |
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547 const std::string& context = "", |
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548 bool verbose = false, bool require_file = true, |
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549 const std::string& warn_for = ""); |
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550 |
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551 extern OCTINTERP_API octave_value_list |
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552 feval (const std::string& name, |
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553 const octave_value_list& args = octave_value_list (), |
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554 int nargout = 0); |
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555 |
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556 extern OCTINTERP_API octave_value_list |
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557 feval (octave_function *fcn, |
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558 const octave_value_list& args = octave_value_list (), |
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559 int nargout = 0); |
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560 |
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561 extern OCTINTERP_API octave_value_list |
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562 feval (octave_value& val, |
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563 const octave_value_list& args = octave_value_list (), |
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564 int nargout = 0); |
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565 |
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566 extern OCTINTERP_API octave_value_list |
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567 feval (const octave_value_list& args, int nargout = 0); |
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568 |
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569 extern OCTINTERP_API octave_value_list |
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570 eval_string (const std::string&, bool silent, int& parse_status, int nargout); |
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571 |
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572 extern OCTINTERP_API octave_value |
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573 eval_string (const std::string&, bool silent, int& parse_status); |
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574 |
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575 extern OCTINTERP_API void |
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576 cleanup_statement_list (octave::tree_statement_list **lst); |
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577 } |
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578 |
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579 #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS) |
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580 |
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581 OCTAVE_DEPRECATED (4.4, "use 'octave::get_help_from_file' instead") |
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582 static inline std::string |
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583 get_help_from_file (const std::string& nm, bool& symbol_found, |
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584 std::string& file) |
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585 { |
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586 return octave::get_help_from_file (nm, symbol_found, file); |
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587 } |
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588 |
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589 OCTAVE_DEPRECATED (4.4, "use 'octave::get_help_from_file' instead") |
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590 static inline std::string |
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591 get_help_from_file (const std::string& nm, bool& symbol_found) |
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592 { |
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593 return octave::get_help_from_file (nm, symbol_found); |
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594 } |
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595 |
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596 OCTAVE_DEPRECATED (4.4, "use 'octave::lookup_autoload' instead") |
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597 static inline std::string |
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598 lookup_autoload (const std::string& nm) |
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599 { |
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600 return octave::lookup_autoload (nm); |
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601 } |
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602 |
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603 OCTAVE_DEPRECATED (4.4, "use 'octave::autoloaded_functions' instead") |
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604 static inline string_vector |
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605 autoloaded_functions (void) |
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606 { |
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607 return octave::autoloaded_functions (); |
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608 } |
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609 |
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610 OCTAVE_DEPRECATED (4.4, "use 'octave::reverse_lookup_autoload' instead") |
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611 static inline string_vector |
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612 reverse_lookup_autoload (const std::string& nm) |
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613 { |
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614 return octave::reverse_lookup_autoload (nm); |
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615 } |
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616 |
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617 OCTAVE_DEPRECATED (4.4, "use 'octave::source_file' instead") |
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618 static inline void |
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619 source_file (const std::string& file_name, |
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620 const std::string& context = "", |
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621 bool verbose = false, bool require_file = true, |
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622 const std::string& warn_for = "") |
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623 { |
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624 octave::source_file (file_name, context, verbose, require_file, warn_for); |
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625 } |
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626 |
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627 OCTAVE_DEPRECATED (4.4, "use 'octave::feval' instead") |
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628 static inline octave_value_list |
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629 feval (const std::string& name, |
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630 const octave_value_list& args = octave_value_list (), |
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631 int nargout = 0) |
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632 { |
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633 return octave::feval (name, args, nargout); |
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634 } |
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635 |
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636 OCTAVE_DEPRECATED (4.4, "use 'octave::feval' instead") |
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637 static inline octave_value_list |
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638 feval (octave_function *fcn, |
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639 const octave_value_list& args = octave_value_list (), |
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640 int nargout = 0) |
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641 { |
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642 return octave::feval (fcn, args, nargout); |
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643 } |
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644 |
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645 OCTAVE_DEPRECATED (4.4, "use 'octave::feval' instead") |
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646 static inline octave_value_list |
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647 feval (const octave_value_list& args, int nargout = 0) |
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648 { |
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649 return octave::feval (args, nargout); |
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650 } |
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651 |
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652 OCTAVE_DEPRECATED (4.4, "use 'octave::eval_string' instead") |
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653 static inline octave_value_list |
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654 eval_string (const std::string& str, bool silent, int& parse_status, int nargout) |
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655 { |
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656 return octave::eval_string (str, silent, parse_status, nargout); |
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657 } |
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658 |
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659 OCTAVE_DEPRECATED (4.4, "use 'octave::eval_string' instead") |
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660 static inline octave_value |
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661 eval_string (const std::string& str, bool silent, int& parse_status) |
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662 { |
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663 return octave::eval_string (str, silent, parse_status); |
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664 } |
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665 |
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666 OCTAVE_DEPRECATED (4.4, "use 'octave::cleanup_statement_list' instead") |
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667 static inline void |
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668 cleanup_statement_list (octave::tree_statement_list **lst) |
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669 { |
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670 octave::cleanup_statement_list (lst); |
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671 } |
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672 |
1 | 673 #endif |
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674 |
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675 #endif |