Mercurial > octave
annotate libinterp/parse-tree/pt-idx.cc @ 27932:b018f553fd85
maint: Use Octave coding conventions in libinterp/
* __ftp__.cc, __ichol__.cc, call-stack.cc, error.h, event-manager.cc,
file-io.cc, gl-render.cc, graphics.cc, help.cc, input.cc, interpreter.cc,
load-path.cc, load-save.cc, ls-hdf5.cc, ls-hdf5.h, mex.cc, oct-hist.cc,
oct-stream.cc, sighandlers.h, stack-frame.cc, stack-frame.h, strfns.cc,
syminfo.cc, sysdep.cc, text-engine.h, url-handle-manager.h, urlwrite.cc,
xpow.cc, __init_fltk__.cc, __ode15__.cc, ccolamd.cc, colamd.cc, cdef-class.cc,
cdef-manager.cc, cdef-manager.h, cdef-method.cc, cdef-object.cc,
cdef-package.h, cdef-property.cc, ov-class.cc, ov-classdef.cc, ov-cx-sparse.cc,
ov-fcn-handle.cc, ov-fcn-inline.cc, ov-fcn.h, ov-java.cc, ov-typeinfo.h,
bp-table.cc, jit-ir.h, jit-typeinfo.h, pt-classdef.h, pt-eval.cc, pt-eval.h,
pt-idx.cc: Use Octave coding conventions in libinterp.
author | Rik <rik@octave.org> |
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date | Fri, 10 Jan 2020 17:25:12 -0800 |
parents | bd51beb6205e |
children | ec769a7ab9fb |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 1996-2020 The Octave Project Developers |
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4 // |
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5 // See the file COPYRIGHT.md in the top-level directory of this |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
2980 | 25 |
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26 #if defined (HAVE_CONFIG_H) |
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27 # include "config.h" |
2980 | 28 #endif |
29 | |
3933 | 30 #include "Cell.h" |
2980 | 31 #include "error.h" |
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32 #include "interpreter-private.h" |
3930 | 33 #include "oct-map.h" |
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34 #include "ovl.h" |
2980 | 35 #include "oct-lvalue.h" |
36 #include "ov.h" | |
2982 | 37 #include "pt-arg-list.h" |
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38 #include "pt-eval.h" |
7336 | 39 #include "pt-id.h" |
2980 | 40 #include "pt-idx.h" |
3930 | 41 #include "utils.h" |
42 #include "variables.h" | |
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43 #include "errwarn.h" |
2980 | 44 |
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45 namespace octave |
3933 | 46 { |
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47 // Index expressions. |
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48 |
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49 tree_index_expression::tree_index_expression (int l, int c) |
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50 : tree_expression (l, c), m_expr (nullptr), m_args (0), m_type (), |
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51 m_arg_nm (), m_dyn_field (), m_word_list_cmd (false) { } |
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52 |
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53 tree_index_expression::tree_index_expression (tree_expression *e, |
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54 tree_argument_list *lst, |
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55 int l, int c, char t) |
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56 : tree_expression (l, c), m_expr (e), m_args (0), m_type (), |
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57 m_arg_nm (), m_dyn_field (), m_word_list_cmd (false) |
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58 { |
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59 append (lst, t); |
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60 } |
4131 | 61 |
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62 tree_index_expression::tree_index_expression (tree_expression *e, |
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63 const std::string& n, |
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64 int l, int c) |
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65 : tree_expression (l, c), m_expr (e), m_args (0), m_type (), |
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66 m_arg_nm (), m_dyn_field (), m_word_list_cmd (false) |
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67 { |
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68 append (n); |
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69 } |
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71 tree_index_expression::tree_index_expression (tree_expression *e, |
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72 tree_expression *df, |
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73 int l, int c) |
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74 : tree_expression (l, c), m_expr (e), m_args (0), m_type (), |
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75 m_arg_nm (), m_dyn_field (), m_word_list_cmd (false) |
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76 { |
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77 append (df); |
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78 } |
3933 | 79 |
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80 void |
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81 tree_index_expression::append (tree_argument_list *lst, char t) |
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82 { |
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83 m_args.push_back (lst); |
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84 m_type.append (1, t); |
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85 m_arg_nm.push_back (lst ? lst->get_arg_names () : string_vector ()); |
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86 m_dyn_field.push_back (static_cast<tree_expression *> (nullptr)); |
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87 |
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88 if (lst && lst->has_magic_tilde ()) |
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89 error ("invalid use of empty argument (~) in index expression"); |
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90 } |
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92 void |
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93 tree_index_expression::append (const std::string& n) |
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94 { |
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95 m_args.push_back (static_cast<tree_argument_list *> (nullptr)); |
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96 m_type += '.'; |
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97 m_arg_nm.push_back (n); |
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98 m_dyn_field.push_back (static_cast<tree_expression *> (nullptr)); |
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99 } |
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100 |
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101 void |
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102 tree_index_expression::append (tree_expression *df) |
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103 { |
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104 m_args.push_back (static_cast<tree_argument_list *> (nullptr)); |
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105 m_type += '.'; |
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106 m_arg_nm.push_back (""); |
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107 m_dyn_field.push_back (df); |
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108 } |
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109 |
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110 tree_index_expression::~tree_index_expression (void) |
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111 { |
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112 delete m_expr; |
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113 |
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114 while (! m_args.empty ()) |
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115 { |
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116 auto p = m_args.begin (); |
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117 delete *p; |
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118 m_args.erase (p); |
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119 } |
2980 | 120 |
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121 while (! m_dyn_field.empty ()) |
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122 { |
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123 auto p = m_dyn_field.begin (); |
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124 delete *p; |
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125 m_dyn_field.erase (p); |
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126 } |
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127 } |
5099 | 128 |
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129 bool |
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130 tree_index_expression::has_magic_end (void) const |
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131 { |
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132 for (const tree_argument_list *elt : m_args) |
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133 { |
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134 if (elt && elt->has_magic_end ()) |
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135 return true; |
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136 } |
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138 return false; |
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139 } |
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140 |
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141 // This is useful for printing the name of the variable in an indexed |
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142 // assignment. |
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144 std::string |
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145 tree_index_expression::name (void) const |
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146 { |
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147 return m_expr->name (); |
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148 } |
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150 static inline octave_value_list |
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151 make_value_list (tree_evaluator& tw, |
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152 tree_argument_list *m_args, |
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153 const string_vector& m_arg_nm, const octave_value *object, |
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154 bool rvalue = true) |
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155 { |
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156 octave_value_list retval; |
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157 |
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158 if (m_args) |
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159 { |
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160 if (rvalue && object && m_args->has_magic_end () |
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161 && object->is_undefined ()) |
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162 err_invalid_inquiry_subscript (); |
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164 retval = tw.convert_to_const_vector (m_args, object); |
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165 } |
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167 octave_idx_type n = retval.length (); |
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169 if (n > 0) |
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170 retval.stash_name_tags (m_arg_nm); |
3933 | 171 |
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172 return retval; |
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173 } |
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174 |
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175 std::string |
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176 tree_index_expression::get_struct_index |
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177 (tree_evaluator& tw, |
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178 std::list<string_vector>::const_iterator p_arg_nm, |
4219 | 179 std::list<tree_expression *>::const_iterator p_dyn_field) const |
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180 { |
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181 std::string fn = (*p_arg_nm)(0); |
4131 | 182 |
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183 if (fn.empty ()) |
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184 { |
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185 tree_expression *df = *p_dyn_field; |
4131 | 186 |
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187 if (df) |
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188 { |
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189 octave_value t = df->evaluate (tw); |
4131 | 190 |
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191 fn = t.xstring_value ("dynamic structure field names must be strings"); |
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192 } |
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193 else |
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194 panic_impossible (); |
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195 } |
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197 return fn; |
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198 } |
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199 |
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200 octave_lvalue |
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201 tree_index_expression::lvalue (tree_evaluator& tw) |
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202 { |
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203 std::list<octave_value_list> idx; |
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204 std::string tmp_type; |
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205 |
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206 int n = m_args.size (); |
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207 |
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208 auto p_args = m_args.begin (); |
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209 auto p_arg_nm = m_arg_nm.begin (); |
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210 auto p_dyn_field = m_dyn_field.begin (); |
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211 |
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212 octave_lvalue retval = m_expr->lvalue (tw); |
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213 |
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214 octave_value tmp = retval.value (); |
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215 |
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216 octave_idx_type tmpi = 0; |
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217 std::list<octave_value_list> tmpidx; |
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218 |
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219 for (int i = 0; i < n; i++) |
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220 { |
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221 if (retval.numel () != 1) |
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222 err_indexed_cs_list (); |
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223 |
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224 if (tmpi < i) |
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225 { |
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226 try |
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227 { |
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228 tmp = tmp.subsref (m_type.substr (tmpi, i-tmpi), tmpidx, true); |
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229 } |
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230 catch (index_exception& e) // problems with range, invalid type etc. |
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231 { |
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232 tw.final_index_error (e, m_expr); |
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233 } |
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234 |
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235 tmpidx.clear (); |
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236 } |
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237 |
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238 switch (m_type[i]) |
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239 { |
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240 case '(': |
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241 { |
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242 octave_value_list tidx |
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243 = make_value_list (tw, *p_args, *p_arg_nm, &tmp, false); |
4432 | 244 |
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245 idx.push_back (tidx); |
5846 | 246 |
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247 if (i < n - 1) |
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248 { |
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249 if (m_type[i+1] != '.') |
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250 error ("() must be followed by . or close the index chain"); |
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251 |
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252 tmpidx.push_back (tidx); |
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253 tmpi = i+1; |
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254 } |
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255 } |
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256 break; |
3930 | 257 |
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258 case '{': |
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259 { |
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260 octave_value_list tidx |
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261 = make_value_list (tw, *p_args, *p_arg_nm, &tmp, false); |
3933 | 262 |
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263 if (tmp.is_undefined ()) |
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264 { |
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265 if (tidx.has_magic_colon ()) |
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266 err_invalid_inquiry_subscript (); |
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267 |
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268 tmp = Cell (); |
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269 } |
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270 else if (tmp.is_zero_by_zero () |
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271 && (tmp.is_matrix_type () || tmp.is_string ())) |
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272 { |
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273 tmp = Cell (); |
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274 } |
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275 |
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276 retval.numel (tmp.xnumel (tidx)); |
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277 |
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278 idx.push_back (tidx); |
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279 tmpidx.push_back (tidx); |
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280 tmpi = i; |
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281 } |
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282 break; |
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284 case '.': |
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285 { |
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286 octave_value tidx = get_struct_index (tw, p_arg_nm, p_dyn_field); |
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287 |
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288 bool autoconv = (tmp.is_zero_by_zero () |
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289 && (tmp.is_matrix_type () || tmp.is_string () |
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290 || tmp.iscell ())); |
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292 if (i > 0 && m_type[i-1] == '(') |
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293 { |
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294 octave_value_list pidx = idx.back (); |
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295 |
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296 // Use octave_map, not octave_scalar_map so that the |
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297 // dimensions are 0x0, not 1x1. |
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298 if (tmp.is_undefined ()) |
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299 { |
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300 if (pidx.has_magic_colon ()) |
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301 err_invalid_inquiry_subscript (); |
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302 |
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303 tmp = octave_map (); |
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304 } |
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305 else if (autoconv) |
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306 tmp = octave_map (); |
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308 retval.numel (tmp.xnumel (pidx)); |
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310 tmpi = i-1; |
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311 tmpidx.push_back (tidx); |
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312 } |
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313 else |
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314 { |
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315 if (tmp.is_undefined () || autoconv) |
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316 { |
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317 tmpi = i+1; |
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318 tmp = octave_value (); |
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319 } |
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320 else |
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321 { |
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322 retval.numel (tmp.xnumel (octave_value_list ())); |
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324 tmpi = i; |
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325 tmpidx.push_back (tidx); |
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326 } |
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327 } |
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328 |
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329 idx.push_back (tidx); |
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330 } |
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331 break; |
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332 |
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333 default: |
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334 panic_impossible (); |
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335 } |
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336 |
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337 if (idx.back ().empty ()) |
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338 error ("invalid empty index list"); |
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340 p_args++; |
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341 p_arg_nm++; |
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342 p_dyn_field++; |
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343 } |
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344 |
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345 retval.set_index (m_type, idx); |
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346 |
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347 return retval; |
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348 } |
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350 tree_index_expression * |
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351 tree_index_expression::dup (symbol_scope& scope) const |
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352 { |
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353 tree_index_expression *new_idx_expr |
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354 = new tree_index_expression (line (), column ()); |
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355 |
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356 new_idx_expr->m_expr = (m_expr ? m_expr->dup (scope) : nullptr); |
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357 |
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358 std::list<tree_argument_list *> new_args; |
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360 for (const tree_argument_list *elt : m_args) |
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361 new_args.push_back (elt ? elt->dup (scope) : nullptr); |
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362 |
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363 new_idx_expr->m_args = new_args; |
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365 new_idx_expr->m_type = m_type; |
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366 |
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367 new_idx_expr->m_arg_nm = m_arg_nm; |
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369 std::list<tree_expression *> new_dyn_field; |
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370 |
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371 for (const tree_expression *elt : m_dyn_field) |
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372 new_dyn_field.push_back (elt ? elt->dup (scope) : nullptr); |
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373 |
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374 new_idx_expr->m_dyn_field = new_dyn_field; |
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375 |
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376 new_idx_expr->copy_base (*this); |
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378 return new_idx_expr; |
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379 } |
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380 |
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381 // Unlike Matlab, which does not allow the result of a function call |
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382 // or array indexing expression to be further indexed, Octave attempts |
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383 // to handle arbitrary index expressions. For example, Octave allows |
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384 // expressions like |
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385 // |
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386 // svd (rand (10))(1:5) |
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387 // |
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388 // Although octave_value objects may contain function objects, no |
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389 // indexing operation or function call is supposed to return them |
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390 // directly. Instead, the language is supposed to only allow function |
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391 // objects to be stored as function handles (named or anonymous) or as |
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392 // inline functions. The only place a function object should appear |
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393 // directly is if the symbol stored in a tree_identifier object |
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394 // resolves to a function. This means that the only place we need to |
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395 // look for functions is in the first element of the index |
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396 // expression. |
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397 // |
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398 // Steps: |
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399 // |
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400 // * Obtain the initial value from the expression component of the |
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401 // tree_index_expression object. If it is a tree_identifier object |
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402 // indexed by '(args)' and the identifier is not a variable, then |
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403 // peform a function call. Use the (optional) arguments to perform |
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404 // the function lookup so we choose the correct function or class |
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405 // method to call. Otherwise, evaluate the first expression |
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406 // without any additional arguments. |
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407 // |
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408 // * Iterate over the remaining elements of the index expression and |
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409 // call the octave_value::subsref method. If indexing a class or |
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410 // classdef object, build up a list of indices for a call to the |
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411 // subsref method for the object. Otherwise, use the result of |
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412 // each temporary evaluation for the next index element. |
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413 // |
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414 // * If not indexing a class or classdef object and any partial |
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415 // expression evaluation produces a class or classdef object, then |
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416 // build up a complete argument list from that point on for a final |
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417 // subsref call for that object. |
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418 // |
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419 // Multiple partial evaluations may be required. For example, |
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420 // given a class or classdef object X, then for the expression |
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421 // |
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422 // x.a{end}(2:end).b |
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423 // |
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424 // we must evaluate x.a to obtain the size for the first {end} |
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425 // expression, then we must evaluate x.a{end} to obtain the size |
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426 // for the second (2:end) expression. Finally, the complete |
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427 // expression may be evaluated. |
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428 // |
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429 // If X is a cell array in the above expression, and none of the |
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430 // intermediate evaluations produces a class or classdef object, |
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431 // then the evaluation is performed as the following series of |
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432 // steps |
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433 // |
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434 // tmp = x.a |
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435 // tmp = tmp{end} |
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436 // tmp = tmp(2:end) |
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437 // result = tmp.b |
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438 // |
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439 // If any of the partial evaluations produces a class or classdef |
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440 // object, then the subsref method for that object is called as |
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441 // described above. For example, suppose x.a produces a classdef |
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442 // object. Then the evaluation is performed as the following |
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443 // series of steps |
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444 // |
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445 // base_expr = tmp = x.a |
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446 // tmp = base_expr{end} |
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447 // base_expr{end}(2:end).b |
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448 // |
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449 // In the last two steps, the partial value computed in the |
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450 // previous step is used to determine the value of END. |
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451 |
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452 octave_value_list |
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453 tree_index_expression::evaluate_n (tree_evaluator& tw, int nargout) |
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454 { |
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455 octave_value_list retval; |
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456 |
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457 assert (! m_args.empty ()); |
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458 |
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459 auto p_args = m_args.begin (); |
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460 auto p_arg_nm = m_arg_nm.begin (); |
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461 auto p_dyn_field = m_dyn_field.begin (); |
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462 |
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463 int n = m_args.size (); |
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464 int beg = 0; |
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465 |
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466 octave_value base_expr_val; |
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467 |
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468 if (m_expr->is_identifier () && m_type[beg] == '(') |
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469 { |
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470 tree_identifier *id = dynamic_cast<tree_identifier *> (m_expr); |
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471 |
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472 bool is_var = tw.is_variable (m_expr); |
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473 |
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474 std::string nm = id->name (); |
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475 |
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476 if (is_var && is_word_list_cmd ()) |
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477 error ("%s used as variable and later as function", nm.c_str ()); |
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478 |
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479 if (! is_var) |
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480 { |
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481 octave_value_list first_args; |
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482 |
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483 tree_argument_list *al = *p_args; |
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484 |
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485 if (al && al->length () > 0) |
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486 { |
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487 unwind_action act ([&tw] (const std::list<octave_lvalue> *lvl) |
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488 { |
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489 tw.set_lvalue_list (lvl); |
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490 }, tw.lvalue_list ()); |
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491 |
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492 tw.set_lvalue_list (nullptr); |
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493 |
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494 string_vector anm = *p_arg_nm; |
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495 first_args = tw.convert_to_const_vector (al); |
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496 first_args.stash_name_tags (anm); |
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497 } |
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498 |
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499 symbol_record sym = id->symbol (); |
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500 |
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501 octave_value val = tw.varval (sym); |
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502 |
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503 if (val.is_undefined ()) |
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504 { |
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505 interpreter& interp = tw.get_interpreter (); |
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506 |
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507 symbol_table& symtab = interp.get_symbol_table (); |
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508 |
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509 val = symtab.find_function (sym.name (), first_args); |
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510 } |
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511 |
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512 octave_function *fcn = nullptr; |
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513 |
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514 if (val.is_function ()) |
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515 fcn = val.function_value (true); |
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516 |
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517 if (fcn) |
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518 { |
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519 try |
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520 { |
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521 retval = fcn->call (tw, nargout, first_args); |
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522 } |
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523 catch (index_exception& e) |
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524 { |
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525 tw.final_index_error (e, m_expr); |
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526 } |
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527 |
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528 beg++; |
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529 p_args++; |
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530 p_arg_nm++; |
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531 p_dyn_field++; |
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532 |
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533 if (n > beg) |
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534 { |
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535 // More indices to follow. Silently ignore |
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536 // extra output values. |
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537 |
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538 if (retval.length () == 0) |
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539 error ("indexing undefined value"); |
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540 else |
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541 base_expr_val = retval(0); |
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542 } |
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543 else |
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544 { |
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545 // No more indices, so we are done. |
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546 |
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547 // See note at end of function about deleting |
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548 // temporaries prior to pushing result. |
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549 |
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550 base_expr_val = octave_value (); |
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551 first_args = octave_value_list (); |
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552 |
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553 return retval; |
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554 } |
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555 } |
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556 } |
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557 } |
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558 |
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559 if (base_expr_val.is_undefined ()) |
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560 base_expr_val = m_expr->evaluate (tw); |
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561 |
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562 // If we are indexing an object or looking at something like |
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563 // |
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564 // classname.static_function (args, ...); |
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565 // |
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566 // then we'll just build a complete index list for one big subsref |
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567 // call. If the expression we are indexing is a classname then |
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568 // base_expr_val will be an octave_classdef_meta object. If we have |
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569 // files in a +packagename folder, they will also be an |
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570 // octave_classdef_meta object, but we don't want to index them. |
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571 |
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572 bool indexing_object = (base_expr_val.isobject () |
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573 || base_expr_val.isjava () |
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574 || (base_expr_val.is_classdef_meta () |
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575 && ! base_expr_val.is_package ())); |
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576 |
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577 std::list<octave_value_list> idx_list; |
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578 |
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579 octave_value partial_expr_val = base_expr_val; |
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580 |
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581 for (int i = beg; i < n; i++) |
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582 { |
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583 if (i > beg) |
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584 { |
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585 tree_argument_list *al = *p_args; |
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586 |
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587 if (! indexing_object || (al && al->has_magic_end ())) |
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588 { |
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589 // Evaluate what we have so far to find the value to |
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590 // pass to the END function. |
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591 |
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592 try |
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593 { |
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594 // Silently ignore extra output values. |
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595 |
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596 octave_value_list tmp_list |
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597 = base_expr_val.subsref (m_type.substr (beg, i-beg), |
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598 idx_list, nargout); |
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599 |
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600 partial_expr_val |
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601 = tmp_list.length () ? tmp_list(0) : octave_value (); |
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602 |
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603 if (! indexing_object) |
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604 { |
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605 base_expr_val = partial_expr_val; |
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606 |
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607 if (partial_expr_val.is_cs_list ()) |
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608 err_indexed_cs_list (); |
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609 |
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610 retval = partial_expr_val; |
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611 |
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612 beg = i; |
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613 idx_list.clear (); |
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614 |
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615 if (partial_expr_val.isobject () |
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616 || partial_expr_val.isjava () |
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617 || (partial_expr_val.is_classdef_meta () |
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618 && ! partial_expr_val.is_package ())) |
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619 { |
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620 // Found an object, so now we'll build up |
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621 // complete index list for one big subsref |
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622 // call from this point on. |
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623 |
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624 // FIXME: is is also possible to have a |
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625 // static method call buried somewhere in |
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626 // the depths of a complex indexing |
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627 // expression so that we would also need to |
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628 // check for an octave_classdef_meta object |
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629 // here? |
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630 |
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631 indexing_object = true; |
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632 } |
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633 } |
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634 } |
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635 catch (index_exception& e) |
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636 { |
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637 tw.final_index_error (e, m_expr); |
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638 } |
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639 } |
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640 } |
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641 |
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642 switch (m_type[i]) |
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643 { |
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644 case '(': |
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645 idx_list.push_back (make_value_list (tw, *p_args, *p_arg_nm, |
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646 &partial_expr_val)); |
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647 break; |
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648 |
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649 case '{': |
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650 idx_list.push_back (make_value_list (tw, *p_args, *p_arg_nm, |
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651 &partial_expr_val)); |
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652 break; |
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653 |
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654 case '.': |
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655 idx_list.push_back (octave_value |
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656 (get_struct_index (tw, p_arg_nm, p_dyn_field))); |
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657 break; |
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658 |
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659 default: |
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660 panic_impossible (); |
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661 } |
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662 |
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663 p_args++; |
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664 p_arg_nm++; |
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665 p_dyn_field++; |
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666 } |
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667 |
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668 |
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669 // If ! idx_list.empty () that means we still have stuff to index |
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670 // otherwise they would have been dealt with and idx_list would have |
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671 // been emptied. |
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672 if (! idx_list.empty ()) |
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673 { |
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674 // This is for +package and other classdef_meta objects |
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675 if (! base_expr_val.is_function () |
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676 || base_expr_val.is_classdef_meta ()) |
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677 { |
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678 try |
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679 { |
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680 retval = base_expr_val.subsref (m_type.substr (beg, n-beg), |
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681 idx_list, nargout); |
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682 beg = n; |
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683 idx_list.clear (); |
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684 } |
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685 catch (index_exception& e) |
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686 { |
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687 tw.final_index_error (e, m_expr); |
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688 } |
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689 } |
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690 else |
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691 { |
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692 // FIXME: we want this to only be a superclass constructor |
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693 // call Should we actually make a check for this or are all |
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694 // other types of calls already dealt with? |
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695 |
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696 octave_function *fcn = base_expr_val.function_value (); |
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697 |
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698 if (fcn) |
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699 { |
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700 try |
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701 { |
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702 // FIXME: is it possible for the IDX_LIST to have |
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703 // more than one element here? Do we need to check? |
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704 |
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705 octave_value_list final_args; |
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706 |
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707 if (idx_list.size () != 1) |
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708 error ("unexpected extra index at end of expression"); |
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709 |
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710 if (m_type[beg] != '(') |
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711 error ("invalid index type '%c' for function call", |
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712 m_type[beg]); |
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713 |
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714 final_args = idx_list.front (); |
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715 |
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716 // FIXME: Do we ever need the names of the arguments |
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717 // passed to FCN here? |
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718 |
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719 retval = fcn->call (tw, nargout, final_args); |
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720 } |
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721 catch (index_exception& e) |
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722 { |
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723 tw.final_index_error (e, m_expr); |
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724 } |
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725 } |
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726 } |
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727 } |
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728 |
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729 // FIXME: when can the following happen? In what case does indexing |
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730 // result in a value that is a function? Classdef method calls? |
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731 // Something else? |
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732 |
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733 octave_value val = (retval.length () ? retval(0) : octave_value ()); |
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734 |
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735 if (val.is_function ()) |
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736 { |
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737 octave_function *fcn = val.function_value (true); |
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738 |
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739 if (fcn) |
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740 { |
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741 octave_value_list final_args; |
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742 |
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743 if (! idx_list.empty ()) |
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744 { |
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745 if (n - beg != 1) |
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746 error ("unexpected extra index at end of expression"); |
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747 |
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748 if (m_type[beg] != '(') |
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749 error ("invalid index type '%c' for function call", |
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750 m_type[beg]); |
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751 |
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752 final_args = idx_list.front (); |
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753 } |
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754 |
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755 retval = fcn->call (tw, nargout, final_args); |
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756 } |
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757 } |
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758 |
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759 // Delete any temporary values prior to pushing the result and |
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760 // returning so that destructors for any temporary classdef handle |
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761 // objects will be called before we return. Otherwise, the |
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762 // destructor may push result values that will wipe out the result |
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763 // that we push below. Although the method name is "push_result" |
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764 // there is only a single register (either an octave_value or an |
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765 // octave_value_list) not a stack. |
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766 |
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767 idx_list.clear (); |
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768 partial_expr_val = octave_value (); |
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769 base_expr_val = octave_value (); |
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770 val = octave_value (); |
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771 |
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772 return retval; |
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773 } |
2980 | 774 } |
775 | |
7099 | 776 /* |
777 %!test | |
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778 %! clear x; |
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779 %! clear y; |
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780 %! y = 3; |
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781 %! x(y(end)) = 1; |
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782 %! assert (x, [0, 0, 1]); |
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783 %! clear x; |
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784 %! clear y; |
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785 %! y = {3}; |
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786 %! x(y{end}) = 1; |
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787 %! assert (x, [0, 0, 1]); |
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788 |
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789 %!test |
7099 | 790 %! x = {1, 2, 3}; |
791 %! [x{:}] = deal (4, 5, 6); | |
792 %! assert (x, {4, 5, 6}); | |
793 | |
794 %!test | |
795 %! [x.a, x.b.c] = deal (1, 2); | |
796 %! assert (x.a == 1 && x.b.c == 2); | |
797 | |
798 %!test | |
799 %! [x.a, x(2).b] = deal (1, 2); | |
800 %! assert (x(1).a == 1 && isempty (x(2).a) && isempty (x(1).b) && x(2).b == 2); | |
801 | |
802 %!test | |
803 %! x = struct (zeros (0, 1), {"a", "b"}); | |
804 %! x(2).b = 1; | |
805 %! assert (x(2).b == 1); | |
806 | |
807 %!test | |
808 %! x = struct (zeros (0, 1), {"a", "b"}); | |
809 %! x(2).b = 1; | |
810 %! assert (x(2).b == 1); | |
811 */ |