Mercurial > octave
annotate libinterp/parse-tree/pt-check.cc @ 27923:bd51beb6205e
update formatting of copyright notices
* Use <https://octave.org/copyright/> instead of
<https://octave.org/COPYRIGHT.html/>.
* For consistency with other comments in the Octave sources, use
C++-style comments for copyright blocks in C and C++ files.
* Use delimiters above and below copyright blocks that are appropriate
for the language used in the file.
* Eliminate extra spacing inside copyright blocks.
* lex.ll (looks_like_copyright): Also allow newlines and carriage
returns before the word "Copyright".
* scripts/mk-doc.pl (gethelp): Also skip empty comment lines.
* bp-table.cc, type.m: Adjust tests.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 08 Jan 2020 11:59:41 -0500 |
parents | 1891570abac8 |
children | 0a5b15007766 |
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 //////////////////////////////////////////////////////////////////////// |
3011 | 25 |
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26 #if defined (HAVE_CONFIG_H) |
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27 # include "config.h" |
3011 | 28 #endif |
29 | |
30 #include "error.h" | |
31 #include "input.h" | |
32 #include "ov-usr-fcn.h" | |
33 #include "pt-all.h" | |
34 | |
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35 namespace octave |
3011 | 36 { |
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37 void |
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38 tree_checker::visit_argument_list (tree_argument_list& lst) |
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39 { |
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40 auto p = lst.begin (); |
3011 | 41 |
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42 while (p != lst.end ()) |
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43 { |
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44 tree_expression *elt = *p++; |
3011 | 45 |
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46 if (elt) |
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47 { |
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48 if (m_do_lvalue_check && ! elt->lvalue_ok ()) |
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49 errmsg ("invalid lvalue in multiple assignment", elt->line ()); |
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50 } |
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51 } |
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52 } |
3011 | 53 |
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54 void |
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55 tree_checker::visit_simple_for_command (tree_simple_for_command& cmd) |
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56 { |
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57 tree_expression *lhs = cmd.left_hand_side (); |
3011 | 58 |
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59 if (lhs) |
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60 { |
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61 if (! lhs->lvalue_ok ()) |
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62 errmsg ("invalid lvalue in for command", cmd.line ()); |
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63 } |
3011 | 64 |
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65 tree_expression *expr = cmd.control_expr (); |
3011 | 66 |
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67 if (expr) |
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68 expr->accept (*this); |
3011 | 69 |
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70 tree_expression *maxproc = cmd.maxproc_expr (); |
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71 |
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72 if (maxproc) |
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73 maxproc->accept (*this); |
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74 |
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75 tree_statement_list *list = cmd.body (); |
3011 | 76 |
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77 if (list) |
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78 list->accept (*this); |
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79 } |
3011 | 80 |
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81 void |
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82 tree_checker::visit_complex_for_command (tree_complex_for_command& cmd) |
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83 { |
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84 tree_argument_list *lhs = cmd.left_hand_side (); |
3011 | 85 |
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86 if (lhs) |
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87 { |
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88 int len = lhs->length (); |
3011 | 89 |
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90 if (len == 0 || len > 2) |
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91 errmsg ("invalid number of output arguments in for command", |
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92 cmd.line ()); |
3011 | 93 |
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94 m_do_lvalue_check = true; |
3011 | 95 |
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96 lhs->accept (*this); |
3011 | 97 |
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98 m_do_lvalue_check = false; |
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99 } |
3011 | 100 |
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101 tree_expression *expr = cmd.control_expr (); |
3011 | 102 |
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103 if (expr) |
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104 expr->accept (*this); |
3011 | 105 |
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106 tree_statement_list *list = cmd.body (); |
3011 | 107 |
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108 if (list) |
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109 list->accept (*this); |
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110 } |
3011 | 111 |
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112 void |
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113 tree_checker::visit_multi_assignment (tree_multi_assignment& expr) |
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114 { |
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115 tree_argument_list *lhs = expr.left_hand_side (); |
3011 | 116 |
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117 if (lhs) |
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118 { |
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119 m_do_lvalue_check = true; |
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121 lhs->accept (*this); |
3011 | 122 |
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123 m_do_lvalue_check = false; |
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124 } |
3011 | 125 |
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126 tree_expression *rhs = expr.right_hand_side (); |
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128 if (rhs) |
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129 rhs->accept (*this); |
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130 } |
3011 | 131 |
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132 void |
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133 tree_checker::visit_simple_assignment (tree_simple_assignment& expr) |
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134 { |
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135 tree_expression *lhs = expr.left_hand_side (); |
3011 | 136 |
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137 if (lhs) |
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138 { |
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139 if (! lhs->lvalue_ok ()) |
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140 errmsg ("invalid lvalue in assignment", expr.line ()); |
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141 } |
3011 | 142 |
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143 tree_expression *rhs = expr.right_hand_side (); |
3011 | 144 |
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145 if (rhs) |
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146 rhs->accept (*this); |
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147 } |
3011 | 148 |
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149 void |
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150 tree_checker::visit_try_catch_command (tree_try_catch_command& cmd) |
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151 { |
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152 tree_statement_list *try_code = cmd.body (); |
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154 tree_identifier *expr_id = cmd.identifier (); |
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155 |
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156 if (expr_id) |
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157 { |
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158 if (! expr_id->lvalue_ok ()) |
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159 errmsg ("invalid lvalue used for identifier in try-catch command", |
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160 cmd.line ()); |
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161 } |
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162 |
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163 if (try_code) |
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164 try_code->accept (*this); |
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166 tree_statement_list *catch_code = cmd.cleanup (); |
3011 | 167 |
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168 if (catch_code) |
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169 catch_code->accept (*this); |
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170 } |
3011 | 171 |
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172 void |
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173 tree_checker::errmsg (const std::string& msg, int line) |
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174 { |
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175 if (m_file_name.empty ()) |
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176 error ("%s", msg.c_str ()); |
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177 else |
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178 error ("%s: %d: %s", m_file_name.c_str (), line, msg.c_str ()); |
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179 } |
4229 | 180 } |