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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_symtab_h) |
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24 #define octave_symtab_h 1 |
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25 |
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26 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <cassert> |
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31 |
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32 #include <string> |
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33 #include <stack> |
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34 |
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35 #include "lo-sstream.h" |
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36 #include "oct-alloc.h" |
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37 #include "str-vec.h" |
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38 |
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39 #include "ov.h" |
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40 |
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41 class octave_lvalue; |
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42 |
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43 class string_vector; |
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44 |
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45 class symbol_record; |
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46 class symbol_table; |
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47 |
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48 struct |
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49 whos_parameter |
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50 { |
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51 char command, modifier; |
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52 int parameter_length, first_parameter_length, dimensions, balance; |
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53 std::string text; |
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54 std::string line; |
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55 }; |
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56 |
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57 // Individual records in a symbol table. |
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58 |
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59 class |
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60 symbol_record |
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61 { |
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62 public: |
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63 |
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64 // If you add or delete an entry here, you'll also need to change |
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65 // the width parameter in the declaration for symbol_type below... |
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66 |
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67 enum TYPE |
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68 { |
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69 UNKNOWN = 0, |
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70 USER_FUNCTION = 1, |
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71 USER_VARIABLE = 2, |
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72 DLD_FUNCTION = 4, |
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73 BUILTIN_FUNCTION = 8, |
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74 COMMAND = 16, |
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75 MAPPER_FUNCTION = 32, |
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76 BUILTIN_VARIABLE = 64, |
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77 BUILTIN_CONSTANT = 128 |
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78 }; |
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79 |
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80 private: |
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81 |
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82 // Variables or functions. |
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83 |
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84 class symbol_def |
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85 { |
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86 public: |
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87 |
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88 symbol_def (const octave_value& val = octave_value (), |
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89 unsigned int sym_type = 0) |
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90 : symbol_type (sym_type), eternal (0), read_only (0), help_string (), |
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91 definition (val), count (1) { } |
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92 |
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93 ~symbol_def (void) { } |
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94 |
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95 bool is_constant (void) const |
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96 { return (symbol_type & symbol_record::BUILTIN_CONSTANT); } |
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97 |
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98 bool is_variable (void) const |
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99 { |
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100 return (symbol_type & symbol_record::USER_VARIABLE |
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101 || symbol_type & symbol_record::BUILTIN_VARIABLE); |
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102 } |
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103 |
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104 // It's not necessary to check for COMMAND and MAPPER_FUNCTION |
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105 // here. Those tags are just used as additional qualifiers for |
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106 // the other types of functions. |
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107 |
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108 bool is_function (void) const |
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109 { |
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110 return (symbol_type & symbol_record::USER_FUNCTION |
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111 || symbol_type & symbol_record::DLD_FUNCTION |
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112 || symbol_type & symbol_record::BUILTIN_FUNCTION); |
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113 } |
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114 |
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115 bool is_user_variable (void) const |
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116 { return (symbol_type & symbol_record::USER_VARIABLE); } |
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117 |
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118 void mark_as_command (void) |
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119 { symbol_type |= symbol_record::COMMAND; } |
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120 |
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121 void unmark_command (void) |
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122 { symbol_type &= ~symbol_record::COMMAND; } |
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123 |
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124 bool is_command (void) const |
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125 { return (symbol_type & symbol_record::COMMAND); } |
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126 |
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127 bool is_mapper_function (void) const |
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128 { return (symbol_type & symbol_record::MAPPER_FUNCTION); } |
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129 |
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130 bool is_user_function (void) const |
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131 { return (symbol_type & symbol_record::USER_FUNCTION); } |
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132 |
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133 bool is_builtin_constant (void) const |
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134 { return (symbol_type & symbol_record::BUILTIN_CONSTANT); } |
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135 |
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136 bool is_builtin_variable (void) const |
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137 { return (symbol_type & symbol_record::BUILTIN_VARIABLE); } |
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138 |
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139 bool is_builtin_function (void) const |
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140 { return (symbol_type & symbol_record::BUILTIN_FUNCTION); } |
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141 |
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142 bool is_dld_function (void) const |
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143 { return (symbol_type & symbol_record::DLD_FUNCTION); } |
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144 |
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145 // XXX FIXME XXX |
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146 bool is_map_element (const std::string& /* elts */) const |
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147 { return false; } |
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148 |
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149 bool is_defined (void) const |
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150 { return definition.is_defined (); } |
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151 |
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152 bool is_read_only (void) const |
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153 { return read_only; } |
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154 |
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155 bool is_eternal (void) const |
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156 { return eternal; } |
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157 |
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158 bool is_matrix_type (void) const |
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159 { return definition.is_matrix_type (); } |
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160 |
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161 size_t byte_size (void) const |
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162 { return definition.byte_size (); }; |
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163 |
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164 int numel (void) const |
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165 { return definition.numel (); }; |
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166 |
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167 dim_vector dims (void) const |
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168 { return definition.dims (); } |
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169 |
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170 int rows (void) const { return definition.rows (); } |
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171 int columns (void) const { return definition.columns (); } |
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172 |
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173 std::string type_name (void) const { return definition.type_name (); } |
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174 |
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175 std::string type_as_string (void) const; |
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176 |
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177 void type (std::ostream& os, const std::string& name, bool pr_type_info, |
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178 bool quiet, bool pr_orig_txt); |
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179 |
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180 std::string which (const std::string& name); |
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181 |
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182 void which (std::ostream& os, const std::string& name); |
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183 |
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184 void define (const octave_value& val, unsigned int sym_type) |
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185 { |
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186 definition = val; |
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187 symbol_type = sym_type; |
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188 } |
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189 |
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190 void protect (void) { read_only = 1; } |
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191 |
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192 void unprotect (void) { read_only = 0; } |
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193 |
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194 void make_eternal (void) { eternal = 1; } |
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195 |
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196 octave_value& def (void) { return definition; } |
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197 |
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198 std::string help (void) const { return help_string; } |
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199 |
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200 void document (const std::string& h) { help_string = h; } |
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201 |
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202 unsigned int type (void) { return symbol_type; } |
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203 |
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204 void *operator new (size_t size) |
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205 { return allocator.alloc (size); } |
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206 |
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207 void operator delete (void *p, size_t size) |
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208 { allocator.free (p, size); } |
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209 |
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210 static octave_allocator allocator; |
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211 |
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212 // The type of this symbol (see the enum above). |
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213 unsigned int symbol_type : 8; |
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214 |
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215 // Nonzero means this variable cannot be cleared. |
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216 unsigned int eternal : 1; |
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217 |
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218 // Nonzero means this variable cannot be given a new value. |
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219 unsigned int read_only : 1; |
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220 |
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221 // The doc string associated with this variable. |
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222 std::string help_string; |
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223 |
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224 // The value of this definition. See ov.h and related files. |
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225 octave_value definition; |
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226 |
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227 // Reference count. |
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228 int count; |
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229 |
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230 void print_info (std::ostream& os, |
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231 const std::string& prefix = std::string ()) const; |
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232 |
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233 // No copying! |
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234 |
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235 symbol_def (const symbol_def& sd); |
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236 |
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237 symbol_def& operator = (const symbol_def& sd); |
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238 }; |
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239 |
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240 public: |
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241 |
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242 typedef int (*change_function) (void); |
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243 |
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244 symbol_record (void) |
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245 : formal_param (0), linked_to_global (0), tagged_static (0), |
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246 can_hide_function (1), nm (), chg_fcn (0), |
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247 definition (new symbol_def ()), next_elem (0) { } |
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248 |
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249 // XXX FIXME XXX -- kluge alert! We obviously need a better way of |
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250 // handling allow_shadow! |
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251 |
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252 symbol_record (const std::string& n, symbol_record *nxt) |
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253 : formal_param (0), linked_to_global (0), tagged_static (0), |
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254 can_hide_function (n != "__end__"), nm (n), chg_fcn (0), |
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255 definition (new symbol_def ()), next_elem (nxt) { } |
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256 |
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257 ~symbol_record (void) { } |
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258 |
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259 std::string name (void) const { return nm; } |
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260 |
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261 std::string help (void) const { return definition->help (); } |
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262 |
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263 octave_value& def (void) { return definition->def (); } |
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264 |
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265 void rename (const std::string& new_name); |
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266 |
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267 bool is_function (void) const |
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268 { return definition->is_function (); } |
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269 |
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270 void mark_as_command (void) |
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271 { definition->mark_as_command (); } |
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272 |
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273 void unmark_command (void) |
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274 { definition->unmark_command (); } |
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275 |
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276 bool is_command (void) const |
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277 { return definition->is_command (); } |
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278 |
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279 bool is_mapper_function (void) const |
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280 { return definition->is_mapper_function (); } |
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281 |
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282 bool is_user_function (void) const |
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283 { return definition->is_user_function (); } |
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284 |
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285 bool is_builtin_function (void) const |
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286 { return definition->is_builtin_function (); } |
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287 |
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288 bool is_dld_function (void) const |
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289 { return definition->is_dld_function (); } |
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290 |
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291 bool is_constant (void) const |
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292 { return definition->is_constant (); } |
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293 |
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294 bool is_builtin_constant (void) const |
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295 { return definition->is_builtin_constant (); } |
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296 |
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297 bool is_variable (void) const |
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298 { return definition->is_variable (); } |
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299 |
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300 bool is_user_variable (void) const |
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301 { return definition->is_user_variable (); } |
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302 |
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303 bool is_builtin_variable (void) const |
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304 { return definition->is_builtin_variable (); } |
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305 |
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306 bool is_map_element (const std::string& elts) const |
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307 { return definition->is_map_element (elts); } |
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308 |
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309 unsigned int type (void) const { return definition->type (); } |
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310 |
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311 bool is_defined (void) const { return definition->is_defined (); } |
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312 |
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313 bool is_read_only (void) const { return definition->is_read_only (); } |
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314 |
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315 bool is_eternal (void) const { return definition->is_eternal (); } |
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316 |
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317 void protect (void) { definition->protect (); } |
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318 |
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319 void unprotect (void) { definition->unprotect (); } |
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320 |
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321 void make_eternal (void) { definition->make_eternal (); } |
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322 |
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323 void set_change_function (change_function f) { chg_fcn = f; } |
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324 |
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325 void define (const octave_value& v, unsigned int sym_type = USER_VARIABLE); |
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326 |
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327 void define_builtin_var (const octave_value& v); |
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328 |
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329 bool define_builtin_const (const octave_value& v); |
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330 |
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331 bool define (octave_function *f, unsigned int sym_type); |
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332 |
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333 void document (const std::string& h) { definition->document (h); } |
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334 |
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335 void clear (void); |
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336 |
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337 void alias (symbol_record *s); |
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338 |
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339 void mark_as_formal_parameter (void); |
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340 bool is_formal_parameter (void) const { return formal_param; } |
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341 |
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342 void mark_as_linked_to_global (void); |
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343 bool is_linked_to_global (void) const { return linked_to_global; } |
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344 |
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345 void mark_as_static (void); |
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346 bool is_static (void) const { return tagged_static; } |
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347 void unmark_static (void) { tagged_static = false; } |
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348 |
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349 bool is_matrix_type (void) const |
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350 { return definition->is_matrix_type (); } |
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351 |
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352 size_t byte_size (void) const |
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353 { return definition->byte_size (); }; |
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354 |
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355 int numel (void) const |
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356 { return definition->numel (); }; |
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357 |
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358 dim_vector dims (void) const { return definition->dims (); } |
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359 |
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360 int dimensions_string_req_first_space (int print_dims) const; |
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361 |
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362 int dimensions_string_req_total_space (int print_dims) const; |
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363 |
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364 std::string make_dimensions_string (int print_dims) const; |
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365 |
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366 int rows (void) const { return definition->rows (); } |
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367 int columns (void) const { return definition->columns (); } |
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368 |
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369 std::string type_name (void) const { return definition->type_name (); } |
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370 |
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371 std::string type_as_string (void) const |
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372 { return definition->type_as_string (); } |
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373 |
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374 void type (std::ostream& os, bool pr_type_info, bool quiet, bool pr_orig_txt) |
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375 { definition->type (os, name (), pr_type_info, quiet, pr_orig_txt); } |
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376 |
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377 std::string which (void) { return definition->which (name ()); } |
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378 |
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379 void which (std::ostream& os) { definition->which (os, name ()); } |
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380 |
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381 octave_value& variable_value (void); |
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382 octave_lvalue variable_reference (void); |
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383 |
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384 symbol_record *next (void) const { return next_elem; } |
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385 |
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386 void chain (symbol_record *s) { next_elem = s; } |
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387 |
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220
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388 void push_context (void); |
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389 |
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220
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390 void pop_context (void); |
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391 |
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392 void print_symbol_info_line (std::ostream& os, |
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393 std::list<whos_parameter>& params) const; |
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394 |
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395 void print_info (std::ostream& os, |
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396 const std::string& prefix = std::string ()) const; |
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397 |
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398 private: |
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399 |
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400 unsigned int formal_param : 1; |
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401 unsigned int linked_to_global : 1; |
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402 unsigned int tagged_static : 1; |
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403 unsigned int can_hide_function : 1; |
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404 |
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405 std::string nm; |
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406 change_function chg_fcn; |
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407 symbol_def *definition; |
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408 symbol_record *next_elem; |
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395
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409 |
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3011
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410 // This should maybe be one stack with a structure containing all the |
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411 // items we need to save for recursive calls... |
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412 std::stack <symbol_def *> context; |
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413 std::stack <unsigned int> global_link_context; |
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414 |
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415 bool read_only_error (const char *action); |
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195
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416 |
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417 void link_to_builtin_variable (void); |
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418 |
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3011
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419 // No copying! |
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420 |
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421 symbol_record (const symbol_record& s); |
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195
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422 |
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8
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423 symbol_record& operator = (const symbol_record& s); |
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424 }; |
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425 |
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767
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426 // A symbol table. |
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200
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427 |
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428 #define SYMTAB_LOCAL_SCOPE 1 |
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429 #define SYMTAB_GLOBAL_SCOPE 2 |
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430 |
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431 #define SYMTAB_ALL_SCOPES (SYMTAB_LOCAL_SCOPE | SYMTAB_GLOBAL_SCOPE) |
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432 |
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3011
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433 #define SYMTAB_ALL_TYPES (symbol_record::USER_FUNCTION \ |
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434 | symbol_record::USER_VARIABLE \ |
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3325
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435 | symbol_record::DLD_FUNCTION \ |
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3011
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436 | symbol_record::BUILTIN_FUNCTION \ |
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4208
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437 | symbol_record::COMMAND \ |
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3011
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438 | symbol_record::MAPPER_FUNCTION \ |
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3258
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439 | symbol_record::BUILTIN_VARIABLE \ |
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440 | symbol_record::BUILTIN_CONSTANT) |
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200
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441 |
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3011
|
442 #define SYMTAB_VARIABLES (symbol_record::USER_VARIABLE \ |
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443 | symbol_record::BUILTIN_VARIABLE) |
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1412
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444 |
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8
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445 class |
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446 symbol_table |
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447 { |
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448 public: |
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449 |
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4238
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450 symbol_table (unsigned int tab_size = 128, |
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451 const std::string& nm = std::string ()) |
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452 : table_size (tab_size), table (new symbol_record [table_size]), |
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453 table_name (nm) |
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4009
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454 { |
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455 assert ((tab_size % 2) == 0); |
|
4238
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456 |
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457 if (table_name.empty ()) |
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458 { |
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459 OSSTREAM buf; |
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460 buf << symtab_count++ << OSSTREAM_ENDS; |
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461 table_name = OSSTREAM_STR (buf); |
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462 OSSTREAM_FREEZE (buf); |
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463 } |
|
4009
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464 } |
|
3011
|
465 |
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466 ~symbol_table (void) |
|
4009
|
467 { |
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468 clear (); |
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469 delete [] table; |
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470 } |
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8
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471 |
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3523
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472 symbol_record *lookup (const std::string& nm, bool insert = false, |
|
2856
|
473 bool warn = false); |
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8
|
474 |
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3523
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475 void rename (const std::string& old_name, const std::string& new_name); |
|
572
|
476 |
|
4009
|
477 void clear (void); |
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478 |
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479 void clear_variables (void); |
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480 void clear_functions (void); |
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481 void clear_globals (void); |
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482 |
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483 bool clear (const std::string& nm); |
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484 |
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485 bool clear_variable (const std::string& nm); |
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486 bool clear_function (const std::string& nm); |
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487 bool clear_global (const std::string& nm); |
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488 |
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489 bool clear_variable_pattern (const std::string& pat); |
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490 bool clear_function_pattern (const std::string& pat); |
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491 bool clear_global_pattern (const std::string& pat); |
|
8
|
492 |
|
164
|
493 int size (void) const; |
|
8
|
494 |
|
3013
|
495 Array<symbol_record *> |
|
4913
|
496 subsymbol_list (const string_vector& pats = string_vector (), |
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497 unsigned int type = SYMTAB_ALL_TYPES, |
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498 unsigned int scope = SYMTAB_ALL_SCOPES) const; |
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|
499 |
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500 Array<symbol_record *> |
|
3355
|
501 symbol_list (const string_vector& pats = string_vector (), |
|
3013
|
502 unsigned int type = SYMTAB_ALL_TYPES, |
|
|
503 unsigned int scope = SYMTAB_ALL_SCOPES) const; |
|
|
504 |
|
195
|
505 |
|
1755
|
506 string_vector |
|
3355
|
507 name_list (const string_vector& pats = string_vector (), |
|
3013
|
508 bool sort = false, unsigned int type = SYMTAB_ALL_TYPES, |
|
|
509 unsigned int scope = SYMTAB_ALL_SCOPES) const; |
|
605
|
510 |
|
4009
|
511 string_vector |
|
|
512 user_function_name_list (void) const |
|
|
513 { |
|
|
514 return name_list |
|
|
515 (string_vector (), false, |
|
|
516 symbol_record::USER_FUNCTION|symbol_record::DLD_FUNCTION, |
|
|
517 SYMTAB_ALL_SCOPES); |
|
|
518 } |
|
|
519 |
|
|
520 string_vector |
|
|
521 global_variable_name_list (void) const |
|
|
522 { |
|
|
523 return name_list |
|
|
524 (string_vector (), false, SYMTAB_VARIABLES, SYMTAB_GLOBAL_SCOPE); |
|
|
525 } |
|
|
526 |
|
|
527 string_vector |
|
|
528 variable_name_list (void) const |
|
|
529 { |
|
|
530 return name_list |
|
|
531 (string_vector (), false, SYMTAB_VARIABLES, SYMTAB_LOCAL_SCOPE); |
|
|
532 } |
|
3011
|
533 |
|
|
534 int maybe_list (const char *header, const string_vector& argv, |
|
3523
|
535 std::ostream& os, bool show_verbose, |
|
3011
|
536 unsigned type, unsigned scope); |
|
|
537 |
|
3523
|
538 Array<symbol_record *> glob (const std::string& pat = std::string ("*"), |
|
3355
|
539 unsigned int type = SYMTAB_ALL_TYPES, |
|
|
540 unsigned int scope = SYMTAB_ALL_SCOPES) const; |
|
8
|
541 |
|
220
|
542 void push_context (void); |
|
3011
|
543 |
|
220
|
544 void pop_context (void); |
|
|
545 |
|
3941
|
546 void print_info (std::ostream& os) const; |
|
3011
|
547 |
|
8
|
548 private: |
|
|
549 |
|
3011
|
550 unsigned int table_size; |
|
|
551 |
|
|
552 symbol_record *table; |
|
|
553 |
|
4238
|
554 std::string table_name; |
|
|
555 |
|
|
556 static unsigned long int symtab_count; |
|
|
557 |
|
4913
|
558 void |
|
|
559 print_descriptor (std::ostream& os, |
|
|
560 std::list<whos_parameter> params) const; |
|
|
561 |
|
|
562 std::list<whos_parameter> |
|
|
563 parse_whos_line_format (Array<symbol_record *>& symbols) const; |
|
|
564 |
|
3523
|
565 unsigned int hash (const std::string& s); |
|
8
|
566 |
|
3011
|
567 // No copying! |
|
8
|
568 |
|
3011
|
569 symbol_table (const symbol_table&); |
|
1962
|
570 |
|
3011
|
571 symbol_table& operator = (const symbol_table&); |
|
|
572 }; |
|
2790
|
573 |
|
4913
|
574 // Defines layout for the whos/who -long command. |
|
|
575 extern std::string Vwhos_line_format; |
|
|
576 |
|
8
|
577 #endif |
|
|
578 |
|
|
579 /* |
|
|
580 ;;; Local Variables: *** |
|
|
581 ;;; mode: C++ *** |
|
|
582 ;;; End: *** |
|
|
583 */ |
