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annotate libinterp/octave-value/cdef-utils.cc @ 26772:d1419ac09564

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split method, package, and property classes from cdef-class file * cdef-method.cc, cdef-method.h, cdef-package.cc, cdef-package.h, cdef-property.cc, cdef-property.h: New files. * libinterp/octave-value/module.mk: Update. * cdef-class.cc, cdef-class.h, cdef-manager.h, cdef-object.cc, cdef-utils.cc, cdef-utils.h, ov-classdef.cc: Adapt as needed for new file arrangement.
author John W. Eaton <jwe@octave.org>
date Fri, 22 Feb 2019 15:28:42 +0000
parents 2f847e3e8d6b
children 568c2ab2782d
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1 /*
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2
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3 Copyright (C) 2012-2019 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software: you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation, either version 3 of the License, or
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10 (at your option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <https://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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26
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27 #include "call-stack.h"
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28 #include "cdef-class.h"
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29 #include "cdef-manager.h"
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30 #include "cdef-method.h"
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31 #include "cdef-package.h"
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32 #include "cdef-property.h"
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33 #include "cdef-utils.h"
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34 #include "interpreter-private.h"
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35 #include "ov-classdef.h"
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36 #include "ov-usr-fcn.h"
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37
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38 std::string
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39 get_base_name (const std::string& nm)
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40 {
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41 std::string::size_type pos = nm.find_last_of ('.');
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42
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43 if (pos != std::string::npos)
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44 return nm.substr (pos + 1);
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45
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46 return nm;
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47 }
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48
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49 void
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50 make_function_of_class (const std::string& class_name,
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51 const octave_value& fcn)
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52 {
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53 octave_function *of = fcn.function_value ();
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54
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55 of->stash_dispatch_class (class_name);
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56
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57 octave_user_function *uf = of->user_function_value (true);
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58
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59 if (uf)
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60 {
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61 if (get_base_name (class_name) == uf->name ())
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62 {
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63 uf->mark_as_class_constructor ();
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64 uf->mark_as_classdef_constructor ();
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65 }
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66 else
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67 uf->mark_as_class_method ();
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68 }
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69 }
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70
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71 void
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72 make_function_of_class (const cdef_class& cls, const octave_value& fcn)
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73 {
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74 make_function_of_class (cls.get_name (), fcn);
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75 }
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76
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77 cdef_class
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78 lookup_class (const std::string& name, bool error_if_not_found,
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79 bool load_if_not_found)
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80 {
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81 cdef_manager& cdm = octave::__get_cdef_manager__ ("lookup_class");
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82
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83 return cdm.find_class (name, error_if_not_found, load_if_not_found);
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84 }
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85
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86 cdef_class
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87 lookup_class (const cdef_class& cls)
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88 {
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89 // FIXME: placeholder for the time being, the purpose
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90 // is to centralized any class update activity here.
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91
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92 return cls;
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93 }
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94
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95 cdef_class
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96 lookup_class (const octave_value& ov)
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97 {
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98 if (ov.is_string())
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99 return lookup_class (ov.string_value ());
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100 else
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101 {
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102 cdef_class cls (to_cdef (ov));
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103
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104 return lookup_class (cls);
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105 }
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106
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107 return cdef_class ();
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108 }
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109
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110 std::list<cdef_class>
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111 lookup_classes (const Cell& cls_list)
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112 {
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113 std::list<cdef_class> retval;
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114
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115 for (int i = 0; i < cls_list.numel (); i++)
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116 {
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117 cdef_class c = lookup_class (cls_list(i));
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118
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119 retval.push_back (c);
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120 }
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121
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122 return retval;
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123 }
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124
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125 octave_value
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126 to_ov (const std::list<cdef_class>& class_list)
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127 {
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128 Cell cls (class_list.size (), 1);
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129 int i = 0;
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130
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131 for (const auto& cdef_cls : class_list)
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132 cls(i++) = to_ov (cdef_cls);
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133
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134 return octave_value (cls);
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135 }
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136
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137 bool
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138 is_dummy_method (const octave_value& fcn)
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139 {
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140 bool retval = false;
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141
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142 if (fcn.is_defined ())
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143 {
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144 if (fcn.is_user_function ())
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145 {
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146 octave_user_function *uf = fcn.user_function_value (true);
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147
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148 if (! uf || ! uf->body ())
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149 retval = true;
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150 }
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151 }
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152 else
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153 retval = true;
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154
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155 return retval;
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156 }
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157
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158 bool
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159 is_superclass (const cdef_class& clsa, const cdef_class& clsb,
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160 bool allow_equal, int max_depth)
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161 {
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162 bool retval = false;
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163
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164 if (allow_equal && clsa == clsb)
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165 retval = true;
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166 else if (max_depth != 0)
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167 {
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168 Cell c = clsb.get ("SuperClasses").cell_value ();
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169
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170 for (int i = 0; ! retval && i < c.numel (); i++)
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171 {
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172 cdef_class cls = lookup_class (c(i));
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173
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174 retval = is_superclass (clsa, cls, true,
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175 max_depth < 0 ? max_depth : max_depth-1);
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176 }
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177 }
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178
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179 return retval;
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180 }
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181
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182 bool
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183 is_strict_superclass (const cdef_class& clsa, const cdef_class& clsb)
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184 {
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185 return is_superclass (clsa, clsb, false);
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186 }
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187
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188 bool
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189 is_direct_superclass (const cdef_class& clsa, const cdef_class& clsb)
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190 {
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191 return is_superclass (clsa, clsb, false, 1);
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192 }
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193
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194 cdef_package
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195 lookup_package (const std::string& name, bool error_if_not_found,
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196 bool load_if_not_found)
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197 {
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198 cdef_manager& cdm = octave::__get_cdef_manager__ ("lookup_package");
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199
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200 return cdm.find_package (name, error_if_not_found, load_if_not_found);
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201 }
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202
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203 cdef_class
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204 get_class_context (std::string& name, bool& in_constructor)
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205 {
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206 cdef_class cls;
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207
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208 octave::call_stack& cs = octave::__get_call_stack__ ("get_class_context");
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209
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210 octave_function *fcn = cs.current ();
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211
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212 in_constructor = false;
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213
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214 if (fcn && (fcn->is_class_method ()
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215 || fcn->is_classdef_constructor ()
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216 || fcn->is_anonymous_function_of_class ()
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217 || (fcn->is_private_function ()
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218 && ! fcn->dispatch_class ().empty ())))
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219 {
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220 cls = lookup_class (fcn->dispatch_class ());
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221
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222 name = fcn->name ();
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223 in_constructor = fcn->is_classdef_constructor ();
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224 }
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225
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226 return cls;
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227 }
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228
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229 cdef_class
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230 get_class_context (void)
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231 {
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232 std::string dummy_string;
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233 bool dummy_bool;
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234
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235 return get_class_context (dummy_string, dummy_bool);
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236 }
26772
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237
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238 bool
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239 check_access (const cdef_class& cls, const octave_value& acc,
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240 const std::string& meth_name, const std::string& prop_name,
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241 bool is_prop_set)
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242 {
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243 if (acc.is_string ())
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244 {
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245 std::string acc_s = acc.string_value ();
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246
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247 if (acc_s == "public")
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248 return true;
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249
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250 cdef_class ctx = get_class_context ();
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251
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252 // The access is private or protected, this requires a
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253 // valid class context.
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254
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255 if (ctx.ok ())
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256 {
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257 if (acc_s == "private")
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258 return (ctx == cls);
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259 else if (acc_s == "protected")
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260 {
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261 if (is_superclass (cls, ctx))
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262 // Calling a protected method in a superclass.
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263 return true;
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264 else if (is_strict_superclass (ctx, cls))
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265 {
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266 // Calling a protected method or property in a derived class.
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267 // This is only allowed if the context class knows about it
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268 // and has access to it.
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269
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270 if (! meth_name.empty ())
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271 {
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272 cdef_method m = ctx.find_method (meth_name);
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273
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274 if (m.ok ())
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275 return check_access (ctx, m.get ("Access"), meth_name);
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276
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277 return false;
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278 }
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279 else if (! prop_name.empty ())
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280 {
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281 cdef_property p = ctx.find_property (prop_name);
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282
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283 if (p.ok ())
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284 {
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285 octave_value p_access = p.get (is_prop_set ?
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286 "SetAccess" :
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287 "GetAccess");
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288
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289 return check_access (ctx, p_access, meth_name,
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290 prop_name, is_prop_set);
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291 }
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292
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293 return false;
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294 }
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295 else
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296 panic_impossible ();
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297 }
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298
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299 return false;
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300 }
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301 else
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302 panic_impossible ();
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303 }
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304 }
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305 else if (acc.isobject ())
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306 {
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307 cdef_class ctx = get_class_context ();
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308
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309 // At this point, a class context is always required.
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310 if (ctx.ok ())
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311 {
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312 if (ctx == cls)
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313 return true;
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314
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315 cdef_class acc_cls (to_cdef (acc));
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316
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317 if (is_superclass (acc_cls, ctx))
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318 return true;
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319 }
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320 }
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321 else if (acc.iscell ())
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322 {
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323 Cell acc_c = acc.cell_value ();
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324
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325 cdef_class ctx = get_class_context ();
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326
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327 // At this point, a class context is always required.
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328
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329 if (ctx.ok ())
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330 {
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331 if (ctx == cls)
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332 return true;
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333
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334 for (int i = 0; i < acc.numel (); i++)
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335 {
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336 cdef_class acc_cls (to_cdef (acc_c(i)));
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337
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338 if (is_superclass (acc_cls, ctx))
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339 return true;
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340 }
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341 }
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342 }
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343 else
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344 error ("invalid property/method access in class `%s'",
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345 cls.get_name ().c_str ());
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346
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347 return false;
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348 }