Mercurial > octave
annotate libinterp/parse-tree/pt-idx.cc @ 33309:d422992b5483
refactor position tracking in the parser
This change replaces direct source line and column tracking in the
tree_* classes with the beginning and ending positions in tokens
created by the lexer. All line and column arguments for tree_*
constructors have been removed. More tree_* classes have been
modified to store tokens that are part of the syntax but not necessary
for evaluation.
Affected files: cdef-class.cc, ov-fcn.cc, ov-fcn.h, ov-usr-fcn.cc,
ov-usr-fcn.h, bp-table.cc, oct-parse.yy, parse.h, pt-arg-list.cc,
pt-arg-list.h, pt-args-block.h, pt-array-list.h, pt-assign.cc,
pt-assign.h, pt-binop.cc, pt-binop.h, pt-cbinop.cc, pt-cbinop.h,
pt-cell.cc, pt-cell.h, pt-classdef.cc, pt-classdef.h, pt-cmd.h,
pt-colon.cc, pt-colon.h, pt-const.cc, pt-const.h, pt-decl.cc,
pt-decl.h, pt-eval.cc, pt-except.h, pt-exp.h, pt-fcn-handle.cc,
pt-fcn-handle.h, pt-id.h, pt-idx.cc, pt-idx.h, pt-jump.h, pt-loop.h,
pt-mat.cc, pt-mat.h, pt-misc.h, pt-select.h, pt-spmd.h, pt-stmt.cc,
pt-stmt.h, pt-unop.cc, pt-unop.h, pt.cc, and pt.h.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Thu, 04 Apr 2024 00:58:56 -0400 |
parents | 70b7f1c285c7 |
children | 56d234504c01 |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 1996-2024 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 //////////////////////////////////////////////////////////////////////// |
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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 OCTAVE_BEGIN_NAMESPACE(octave) |
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46 |
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47 // Index expressions. |
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48 |
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49 tree_index_expression::tree_index_expression (tree_expression *e, const token& open_delim, tree_argument_list *lst, const token& close_delim, char t) |
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50 : m_expr (e), m_args (0), m_type (), m_arg_nm (), m_dyn_field (), m_word_list_cmd (false) |
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51 { |
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52 append (open_delim, lst, close_delim, t); |
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53 } |
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54 |
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55 tree_index_expression::tree_index_expression (tree_expression *e, const token& dot_tok, const token& struct_elt_tok) |
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56 : m_expr (e), m_args (0), m_type (), m_arg_nm (), m_dyn_field (), m_word_list_cmd (false) |
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57 { |
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58 append (dot_tok, struct_elt_tok); |
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59 } |
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60 |
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61 tree_index_expression::tree_index_expression (tree_expression *e, const token& dot_tok, const token& open_paren, tree_expression *df, const token& close_paren) |
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62 : m_expr (e), m_args (0), m_type (), m_arg_nm (), m_dyn_field (), m_word_list_cmd (false) |
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63 { |
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64 append (dot_tok, open_paren, df, close_paren); |
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65 } |
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66 |
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67 tree_index_expression * |
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68 tree_index_expression::append (const token& open_delim, tree_argument_list *lst, const token& close_delim, char t) |
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69 { |
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70 lst->mark_in_delims (open_delim, close_delim); |
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71 m_args.push_back (lst); |
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72 m_type.append (1, t); |
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73 m_dot_tok.push_back (token ()); |
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74 m_arg_nm.push_back (lst ? lst->get_arg_names () : string_vector ()); |
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75 m_dyn_field.push_back (static_cast<tree_expression *> (nullptr)); |
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76 |
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77 if (lst && lst->has_magic_tilde ()) |
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78 error ("invalid use of empty argument (~) in index expression"); |
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79 |
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80 return this; |
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81 } |
4131 | 82 |
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83 tree_index_expression * |
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84 tree_index_expression::append (const token& dot_tok, const token& struct_elt_tok) |
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85 { |
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86 m_args.push_back (static_cast<tree_argument_list *> (nullptr)); |
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87 m_type += '.'; |
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88 m_dot_tok.push_back (dot_tok); |
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89 m_arg_nm.push_back (struct_elt_tok.text ()); |
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90 m_dyn_field.push_back (static_cast<tree_expression *> (nullptr)); |
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91 |
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92 return this; |
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93 } |
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94 |
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95 tree_index_expression * |
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96 tree_index_expression::append (const token& dot_tok, const token& open_paren, tree_expression *df, const token& close_paren) |
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97 { |
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98 m_args.push_back (static_cast<tree_argument_list *> (nullptr)); |
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99 m_type += '.'; |
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100 m_dot_tok.push_back (dot_tok); |
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101 m_arg_nm.push_back (""); |
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102 df->mark_in_delims (open_paren, close_paren); |
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103 m_dyn_field.push_back (df); |
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104 |
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105 return this; |
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106 } |
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107 |
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108 tree_index_expression::~tree_index_expression () |
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109 { |
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110 delete m_expr; |
3930 | 111 |
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112 while (! m_args.empty ()) |
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113 { |
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114 auto p = m_args.begin (); |
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115 delete *p; |
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116 m_args.erase (p); |
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117 } |
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118 |
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119 while (! m_dyn_field.empty ()) |
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120 { |
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121 auto p = m_dyn_field.begin (); |
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122 delete *p; |
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123 m_dyn_field.erase (p); |
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124 } |
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125 } |
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126 |
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127 // This is useful for printing the name of the variable in an indexed |
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128 // assignment. |
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129 |
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130 std::string |
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131 tree_index_expression::name () const |
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132 { |
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133 return m_expr->name (); |
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134 } |
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135 |
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136 filepos |
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137 tree_index_expression::end_pos () const |
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138 { |
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139 int n = m_args.size (); |
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140 |
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141 if (n == 0) |
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142 return m_expr->end_pos (); |
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143 |
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144 char idx_type = m_type[n-1]; |
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145 |
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146 if (idx_type == '(' || idx_type == '{') |
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147 { |
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148 tree_argument_list *args = m_args.back (); |
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149 return args->end_pos (); |
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150 } |
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151 |
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152 if (idx_type == '.') |
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153 { |
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154 tree_expression *dyn_field = m_dyn_field.back (); |
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155 return dyn_field->end_pos (); |
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156 } |
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157 |
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158 panic_impossible (); |
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159 } |
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160 |
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161 std::string |
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162 tree_index_expression::get_struct_index |
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163 (tree_evaluator& tw, |
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164 std::list<string_vector>::const_iterator p_arg_nm, |
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165 std::list<tree_expression *>::const_iterator p_dyn_field) const |
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166 { |
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167 std::string fn = (*p_arg_nm)(0); |
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168 |
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169 if (fn.empty ()) |
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170 { |
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171 tree_expression *df = *p_dyn_field; |
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173 if (df) |
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174 { |
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175 octave_value t = df->evaluate (tw); |
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176 |
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177 fn = t.xstring_value ("dynamic structure field names must be strings"); |
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178 } |
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179 else |
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180 panic_impossible (); |
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181 } |
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182 |
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183 return fn; |
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184 } |
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185 |
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186 octave_lvalue |
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187 tree_index_expression::lvalue (tree_evaluator& tw) |
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188 { |
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189 std::list<octave_value_list> idx; |
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190 |
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191 int n = m_args.size (); |
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192 |
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193 auto p_args = m_args.begin (); |
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194 auto p_arg_nm = m_arg_nm.begin (); |
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195 auto p_dyn_field = m_dyn_field.begin (); |
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196 |
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197 octave_lvalue retval = m_expr->lvalue (tw); |
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198 |
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199 unwind_action |
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200 act ([&tw] (const octave_value& val, |
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201 const std::string& index_type, |
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202 const std::list<octave_value_list>& index_list) |
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203 { |
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204 tw.set_indexed_object (val); |
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205 tw.set_index_list (index_type, index_list); |
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206 }, tw.indexed_object (), tw.index_type (), tw.index_list ()); |
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207 |
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208 tw.set_indexed_object (retval.value ()); |
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209 tw.clear_index_list (); |
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210 |
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211 for (int i = 0; i < n; i++) |
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212 { |
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213 switch (m_type[i]) |
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214 { |
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215 case '(': |
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216 { |
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217 octave_value_list tidx = tw.make_value_list (*p_args, *p_arg_nm); |
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218 |
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219 tw.append_index_list ('(', tidx); |
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220 idx.push_back (tidx); |
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221 } |
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222 break; |
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223 |
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224 case '{': |
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225 { |
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226 octave_value_list tidx = tw.make_value_list (*p_args, *p_arg_nm); |
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228 tw.append_index_list ('{', tidx); |
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229 idx.push_back (tidx); |
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230 } |
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231 break; |
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232 |
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233 case '.': |
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234 { |
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235 octave_value tidx = get_struct_index (tw, p_arg_nm, p_dyn_field); |
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236 |
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237 tw.append_index_list ('.', tidx); |
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238 idx.push_back (tidx); |
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239 } |
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240 break; |
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241 |
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242 default: |
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243 panic_impossible (); |
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244 } |
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245 |
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246 if (idx.back ().empty ()) |
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247 error ("invalid empty index list"); |
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248 |
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249 p_args++; |
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250 p_arg_nm++; |
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251 p_dyn_field++; |
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252 } |
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253 |
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254 retval.set_index (m_type, idx); |
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255 |
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256 return retval; |
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257 } |
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258 |
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259 tree_index_expression * |
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260 tree_index_expression::dup (symbol_scope& scope) const |
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261 { |
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262 tree_index_expression *new_idx_expr = new tree_index_expression (); |
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263 |
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264 new_idx_expr->m_expr = (m_expr ? m_expr->dup (scope) : nullptr); |
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265 |
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266 std::list<tree_argument_list *> new_args; |
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267 |
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268 for (const tree_argument_list *elt : m_args) |
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269 new_args.push_back (elt ? elt->dup (scope) : nullptr); |
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270 |
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271 new_idx_expr->m_args = new_args; |
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272 |
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273 new_idx_expr->m_type = m_type; |
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274 |
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275 new_idx_expr->m_arg_nm = m_arg_nm; |
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276 |
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277 std::list<tree_expression *> new_dyn_field; |
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278 |
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279 for (const tree_expression *elt : m_dyn_field) |
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280 new_dyn_field.push_back (elt ? elt->dup (scope) : nullptr); |
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281 |
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282 new_idx_expr->m_dyn_field = new_dyn_field; |
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283 |
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284 new_idx_expr->copy_base (*this); |
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285 |
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286 return new_idx_expr; |
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287 } |
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289 // Unlike Matlab, which does not allow the result of a function call |
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290 // or array indexing expression to be further indexed, Octave attempts |
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291 // to handle arbitrary index expressions. For example, Octave allows |
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292 // expressions like |
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293 // |
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294 // svd (rand (10))(1:5) |
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295 // |
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296 // Although octave_value objects may contain function objects, no |
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297 // indexing operation or function call is supposed to return them |
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298 // directly. Instead, the language is supposed to only allow function |
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299 // objects to be stored as function handles (named or anonymous) or as |
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300 // inline functions. The only place a function object should appear |
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301 // directly is if the symbol stored in a tree_identifier object |
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302 // resolves to a function. This means that the only place we need to |
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303 // look for functions is in the first element of the index |
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304 // expression. |
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305 // |
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306 // Steps: |
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307 // |
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308 // * Obtain the initial value from the expression component of the |
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309 // tree_index_expression object. If it is a tree_identifier object |
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310 // indexed by '(args)' and the identifier is not a variable, then |
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311 // perform a function call. Use the (optional) arguments to perform |
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312 // the function lookup so we choose the correct function or class |
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313 // method to call. Otherwise, evaluate the first expression |
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314 // without any additional arguments. |
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315 // |
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316 // * Iterate over the remaining elements of the index expression and |
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317 // call the octave_value::subsref method. If indexing a class or |
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318 // classdef object, build up a list of indices for a call to the |
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319 // subsref method for the object. Otherwise, use the result of |
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320 // each temporary evaluation for the next index element. |
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321 // |
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322 // * If not indexing a class or classdef object and any partial |
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323 // expression evaluation produces a class or classdef object, then |
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324 // build up a complete argument list from that point on for a final |
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325 // subsref call for that object. |
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326 // |
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327 // Multiple partial evaluations may be required. For example, |
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328 // given a class or classdef object X, then for the expression |
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329 // |
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330 // x.a{end}(2:end).b |
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331 // |
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332 // we must evaluate x.a to obtain the size for the first {end} |
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333 // expression, then we must evaluate x.a{end} to obtain the size |
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334 // for the second (2:end) expression. Finally, the complete |
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335 // expression may be evaluated. |
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336 // |
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337 // If X is a cell array in the above expression, and none of the |
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338 // intermediate evaluations produces a class or classdef object, |
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339 // then the evaluation is performed as the following series of |
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340 // steps |
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341 // |
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342 // tmp = x.a |
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343 // tmp = tmp{end} |
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344 // tmp = tmp(2:end) |
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345 // result = tmp.b |
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346 // |
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347 // If any of the partial evaluations produces a class or classdef |
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348 // object, then the subsref method for that object is called as |
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349 // described above. For example, suppose x.a produces a classdef |
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350 // object. Then the evaluation is performed as the following |
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351 // series of steps |
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352 // |
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353 // base_expr = tmp = x.a |
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354 // tmp = base_expr{end} |
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355 // base_expr{end}(2:end).b |
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356 // |
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357 // In the last two steps, the partial value computed in the |
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358 // previous step is used to determine the value of END. |
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360 octave_value_list |
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361 tree_index_expression::evaluate_n (tree_evaluator& tw, int nargout) |
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362 { |
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363 octave_value_list retval; |
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364 |
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365 panic_if (m_args.empty ()); |
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366 |
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367 auto p_args = m_args.begin (); |
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368 auto p_arg_nm = m_arg_nm.begin (); |
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369 auto p_dyn_field = m_dyn_field.begin (); |
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371 int n = m_args.size (); |
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372 int beg = 0; |
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373 |
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374 octave_value base_expr_val; |
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375 |
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376 if (m_expr->is_identifier () && m_type[beg] == '(') |
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377 { |
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378 tree_identifier *id = dynamic_cast<tree_identifier *> (m_expr); |
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379 |
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380 bool is_var = tw.is_variable (m_expr); |
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381 |
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382 std::string nm = id->name (); |
3933 | 383 |
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384 if (is_var && is_word_list_cmd ()) |
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385 { |
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386 bool maybe_binary_op = false; |
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387 if ((*p_args) && (*p_args)->size () > 0) |
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388 { |
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389 // check if first character of first argument might be (the |
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390 // start of) a binary operator |
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391 std::string ops = "+-*/\\.^|&"; |
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392 string_vector arg_list = (*p_args)->get_arg_names (); |
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393 if (! arg_list.isempty () |
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394 && (ops.find (arg_list(0)[1]) != std::string::npos)) |
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395 maybe_binary_op = true; |
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396 } |
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397 |
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398 std::string advice; |
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399 if (maybe_binary_op) |
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400 advice = "\nCheck whitespace around potential binary operator."; |
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401 |
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402 error ("variable \"%s\" used as function in command style expression%s", |
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403 nm.c_str (), advice.c_str ()); |
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404 } |
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405 |
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406 if (! is_var) |
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407 { |
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408 octave_value_list first_args; |
4131 | 409 |
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410 tree_argument_list *al = *p_args; |
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411 |
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412 if (al && al->size () > 0) |
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413 { |
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414 unwind_action act ([&tw] (const std::list<octave_lvalue> *lvl) |
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415 { |
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416 tw.set_lvalue_list (lvl); |
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417 }, tw.lvalue_list ()); |
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418 |
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419 tw.set_lvalue_list (nullptr); |
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420 |
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421 string_vector anm = *p_arg_nm; |
4131 | 422 |
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423 first_args = tw.convert_to_const_vector (al); |
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424 |
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425 first_args.stash_name_tags (anm); |
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426 } |
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427 |
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428 interpreter& interp = tw.get_interpreter (); |
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429 |
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430 symbol_table& symtab = interp.get_symbol_table (); |
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431 |
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432 octave_value val = symtab.find_function (nm, first_args); |
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433 |
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434 octave_function *fcn = nullptr; |
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435 |
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436 if (val.is_function ()) |
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437 fcn = val.function_value (true); |
4131 | 438 |
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439 if (fcn) |
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440 { |
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441 try |
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442 { |
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443 retval = fcn->call (tw, nargout, first_args); |
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444 } |
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445 catch (index_exception& ie) |
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446 { |
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447 tw.final_index_error (ie, m_expr); |
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448 } |
4131 | 449 |
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450 beg++; |
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451 p_args++; |
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452 p_arg_nm++; |
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453 p_dyn_field++; |
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454 |
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455 if (n > beg) |
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456 { |
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457 // More indices to follow. Silently ignore |
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458 // extra output values. |
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459 |
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460 if (retval.length () == 0) |
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461 error ("indexing undefined value"); |
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462 else |
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463 base_expr_val = retval(0); |
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464 } |
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465 else |
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466 { |
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467 // No more indices, so we are done. |
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Jaroslav Hajek <highegg@gmail.com>
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468 |
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469 // See note at end of function about deleting |
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470 // temporaries prior to pushing result. |
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471 |
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472 base_expr_val = octave_value (); |
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473 first_args = octave_value_list (); |
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474 |
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475 return retval; |
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476 } |
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477 } |
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478 } |
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479 } |
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480 |
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481 if (base_expr_val.is_undefined ()) |
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482 base_expr_val = m_expr->evaluate (tw); |
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483 |
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484 // If we are indexing an object or looking at something like |
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485 // |
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486 // classname.static_function (args, ...); |
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487 // |
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488 // then we'll just build a complete index list for one big subsref |
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489 // call. If the expression we are indexing is a classname then |
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490 // base_expr_val will be an octave_classdef_meta object. If we have |
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491 // files in a +packagename folder, they will also be an |
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492 // octave_classdef_meta object, but we don't want to index them. |
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493 |
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494 std::list<octave_value_list> idx_list; |
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495 |
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496 { |
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497 // Note: need new scope so that the following unwind action will |
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498 // happen before we perform the final indexing for objects (for |
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499 // example). |
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500 |
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refactor implementation of END indexing in interpreter (bug #58953)
John W. Eaton <jwe@octave.org> and Fernando Alvarruiz
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501 unwind_action |
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502 act ([&tw] (const octave_value& val, |
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503 const std::string& index_type, |
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504 const std::list<octave_value_list>& index_list) |
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505 { |
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506 tw.set_indexed_object (val); |
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507 tw.set_index_list (index_type, index_list); |
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508 }, |
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509 tw.indexed_object (), |
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510 tw.index_type (), tw.index_list ()); |
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511 |
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512 tw.set_indexed_object (); |
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513 tw.clear_index_list (); |
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514 |
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515 bool indexing_object = (base_expr_val.isobject () |
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516 || base_expr_val.isjava () |
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517 || (base_expr_val.is_classdef_meta () |
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518 && ! base_expr_val.is_package ())); |
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519 |
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520 octave_value partial_expr_val = base_expr_val; |
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521 |
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522 for (int i = beg; i < n; i++) |
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523 { |
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524 if (i > beg) |
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525 { |
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526 if (! indexing_object) |
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527 { |
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528 // Evaluate what we have so far. |
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529 |
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530 try |
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531 { |
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532 // Silently ignore extra output values. |
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533 |
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534 octave_value_list tmp_list |
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535 = base_expr_val.subsref (m_type.substr (beg, i-beg), |
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536 idx_list, nargout); |
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537 |
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538 partial_expr_val |
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539 = tmp_list.length () ? tmp_list(0) : octave_value (); |
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540 |
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541 base_expr_val = partial_expr_val; |
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542 |
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543 if (partial_expr_val.is_cs_list ()) |
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544 err_indexed_cs_list (); |
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545 |
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546 retval = partial_expr_val; |
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547 |
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548 beg = i; |
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549 idx_list.clear (); |
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550 tw.clear_index_list (); |
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551 |
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552 if (partial_expr_val.isobject () |
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553 || partial_expr_val.isjava () |
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554 || (partial_expr_val.is_classdef_meta () |
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555 && ! partial_expr_val.is_package ())) |
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556 { |
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557 // Found an object, so now we'll build up |
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558 // complete index list for one big subsref |
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559 // call from this point on. |
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560 |
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561 // FIXME: is is also possible to have a |
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562 // static method call buried somewhere in |
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563 // the depths of a complex indexing |
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564 // expression so that we would also need to |
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565 // check for an octave_classdef_meta object |
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566 // here? |
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567 |
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568 indexing_object = true; |
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569 } |
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570 } |
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571 catch (index_exception& ie) |
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572 { |
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573 tw.final_index_error (ie, m_expr); |
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574 } |
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575 } |
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576 } |
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577 |
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578 tw.set_indexed_object (partial_expr_val); |
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579 |
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580 switch (m_type[i]) |
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581 { |
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582 case '(': |
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583 { |
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584 octave_value_list tmp = tw.make_value_list (*p_args, *p_arg_nm); |
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585 tw.append_index_list ('(', tmp); |
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586 idx_list.push_back (tmp); |
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587 } |
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588 break; |
3930 | 589 |
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590 case '{': |
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591 { |
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592 octave_value_list tmp = tw.make_value_list (*p_args, *p_arg_nm); |
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593 tw.append_index_list ('{', tmp); |
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594 idx_list.push_back (tmp); |
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595 } |
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596 break; |
2980 | 597 |
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598 case '.': |
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599 { |
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600 octave_value tmp = get_struct_index (tw, p_arg_nm, p_dyn_field); |
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601 tw.append_index_list ('.', tmp); |
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602 idx_list.push_back (tmp); |
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603 } |
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604 break; |
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|
605 |
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606 default: |
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607 panic_impossible (); |
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608 } |
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609 |
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610 p_args++; |
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611 p_arg_nm++; |
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612 p_dyn_field++; |
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613 } |
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614 } |
27371
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615 |
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616 // If ! idx_list.empty () that means we still have stuff to index |
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617 // otherwise they would have been dealt with and idx_list would have |
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618 // been emptied. |
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619 if (! idx_list.empty ()) |
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620 { |
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621 // This is for +package and other classdef_meta objects |
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622 if (! base_expr_val.is_function () |
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623 || base_expr_val.is_classdef_meta ()) |
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624 { |
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625 try |
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626 { |
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627 retval = base_expr_val.subsref (m_type.substr (beg, n-beg), |
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628 idx_list, nargout); |
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629 beg = n; |
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630 idx_list.clear (); |
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631 } |
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632 catch (index_exception& ie) |
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633 { |
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634 tw.final_index_error (ie, m_expr); |
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635 } |
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636 } |
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637 else |
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638 { |
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639 // FIXME: we want this to only be a superclass constructor |
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640 // call Should we actually make a check for this or are all |
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641 // other types of calls already dealt with? |
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642 |
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643 octave_function *fcn = base_expr_val.function_value (); |
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644 |
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645 if (fcn) |
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646 { |
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647 try |
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648 { |
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649 // FIXME: is it possible for the IDX_LIST to have |
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650 // more than one element here? Do we need to check? |
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651 |
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652 octave_value_list final_args; |
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653 |
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654 if (idx_list.size () != 1) |
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655 error ("unexpected extra index at end of expression"); |
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656 |
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657 if (m_type[beg] != '(') |
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658 error ("invalid index type '%c' for function call", |
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659 m_type[beg]); |
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660 |
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661 final_args = idx_list.front (); |
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662 |
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663 // FIXME: Do we ever need the names of the arguments |
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664 // passed to FCN here? |
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665 |
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666 retval = fcn->call (tw, nargout, final_args); |
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667 } |
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668 catch (index_exception& ie) |
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669 { |
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670 tw.final_index_error (ie, m_expr); |
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671 } |
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672 } |
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673 } |
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674 } |
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675 |
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676 // FIXME: when can the following happen? In what case does indexing |
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677 // result in a value that is a function? Classdef method calls? |
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678 // Something else? |
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679 |
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680 octave_value val = (retval.length () ? retval(0) : octave_value ()); |
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681 |
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682 if (val.is_function ()) |
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683 { |
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684 octave_function *fcn = val.function_value (true); |
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685 |
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686 if (fcn) |
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687 { |
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688 octave_value_list final_args; |
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689 |
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690 if (! idx_list.empty ()) |
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691 { |
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692 if (n - beg != 1) |
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693 error ("unexpected extra index at end of expression"); |
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694 |
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695 if (m_type[beg] != '(') |
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696 error ("invalid index type '%c' for function call", |
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697 m_type[beg]); |
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698 |
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699 final_args = idx_list.front (); |
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700 } |
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701 |
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702 retval = fcn->call (tw, nargout, final_args); |
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703 } |
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704 } |
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705 |
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706 // Delete any temporary values prior to returning so that |
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707 // destructors for any temporary classdef handle objects will be |
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708 // called before we return. |
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709 |
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710 idx_list.clear (); |
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711 base_expr_val = octave_value (); |
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712 val = octave_value (); |
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713 |
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714 return retval; |
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715 } |
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716 |
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717 OCTAVE_END_NAMESPACE(octave) |
2980 | 718 |
7099 | 719 /* |
720 %!test | |
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721 %! clear x; |
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722 %! clear y; |
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723 %! y = 3; |
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724 %! x(y(end)) = 1; |
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725 %! assert (x, [0, 0, 1]); |
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726 %! clear x; |
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727 %! clear y; |
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728 %! y = {3}; |
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729 %! x(y{end}) = 1; |
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730 %! assert (x, [0, 0, 1]); |
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731 |
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732 %!test |
7099 | 733 %! x = {1, 2, 3}; |
734 %! [x{:}] = deal (4, 5, 6); | |
735 %! assert (x, {4, 5, 6}); | |
736 | |
737 %!test | |
738 %! [x.a, x.b.c] = deal (1, 2); | |
739 %! assert (x.a == 1 && x.b.c == 2); | |
740 | |
741 %!test | |
742 %! [x.a, x(2).b] = deal (1, 2); | |
743 %! assert (x(1).a == 1 && isempty (x(2).a) && isempty (x(1).b) && x(2).b == 2); | |
744 | |
745 %!test | |
746 %! x = struct (zeros (0, 1), {"a", "b"}); | |
747 %! x(2).b = 1; | |
748 %! assert (x(2).b == 1); | |
749 | |
750 %!test | |
751 %! x = struct (zeros (0, 1), {"a", "b"}); | |
752 %! x(2).b = 1; | |
753 %! assert (x(2).b == 1); | |
754 */ |