Mercurial > octave
annotate libinterp/parse-tree/pt-binop.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 | 70cdf8de553d 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 //////////////////////////////////////////////////////////////////////// |
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26 #if defined (HAVE_CONFIG_H) |
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27 # include "config.h" |
2980 | 28 #endif |
29 | |
30 #include "error.h" | |
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31 #include "interpreter.h" |
2980 | 32 #include "ov.h" |
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33 #include "profiler.h" |
2980 | 34 #include "pt-binop.h" |
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35 #include "pt-eval.h" |
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36 #include "variables.h" |
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37 |
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38 namespace octave |
5861 | 39 { |
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40 // Binary expressions. |
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41 |
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42 void |
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43 tree_binary_expression::matlab_style_short_circuit_warning (const char *op) |
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44 { |
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45 warning_with_id ("Octave:possible-matlab-short-circuit-operator", |
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46 "Matlab-style short-circuit operation performed for operator %s", |
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47 op); |
2980 | 48 |
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49 m_braindead_shortcircuit_warning_issued = true; |
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50 } |
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51 |
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52 std::string |
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53 tree_binary_expression::oper (void) const |
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54 { |
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55 return octave_value::binary_op_as_string (m_etype); |
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56 } |
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57 |
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58 tree_expression * |
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59 tree_binary_expression::dup (symbol_scope& scope) const |
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60 { |
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61 tree_binary_expression *new_be |
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62 = new tree_binary_expression (m_lhs ? m_lhs->dup (scope) : nullptr, |
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63 m_rhs ? m_rhs->dup (scope) : nullptr, |
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64 line (), column (), m_etype); |
2980 | 65 |
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66 new_be->copy_base (*this); |
2980 | 67 |
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68 return new_be; |
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69 } |
2980 | 70 |
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71 octave_value |
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72 tree_binary_expression::evaluate (tree_evaluator& tw, int) |
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73 { |
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74 octave_value val; |
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75 |
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76 if (is_eligible_for_braindead_shortcircuit ()) |
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77 { |
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78 if (m_lhs) |
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79 { |
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80 octave_value a = m_lhs->evaluate (tw); |
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81 |
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82 if (a.ndims () == 2 && a.rows () == 1 && a.columns () == 1) |
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83 { |
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84 bool result = false; |
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85 |
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86 bool a_true = a.is_true (); |
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87 |
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88 if (a_true) |
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89 { |
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90 if (m_etype == octave_value::op_el_or) |
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91 { |
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92 matlab_style_short_circuit_warning ("|"); |
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93 return octave_value (true); |
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94 } |
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95 } |
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96 else |
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97 { |
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98 if (m_etype == octave_value::op_el_and) |
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99 { |
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100 matlab_style_short_circuit_warning ("&"); |
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101 return octave_value (false); |
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102 } |
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103 } |
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104 |
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105 if (m_rhs) |
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106 { |
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107 octave_value b = m_rhs->evaluate (tw); |
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108 |
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109 result = b.is_true (); |
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110 } |
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111 |
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112 return octave_value (result); |
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113 } |
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114 } |
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115 } |
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116 |
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117 if (m_lhs) |
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118 { |
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119 octave_value a = m_lhs->evaluate (tw); |
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120 |
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121 if (a.is_defined () && m_rhs) |
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122 { |
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123 octave_value b = m_rhs->evaluate (tw); |
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124 |
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125 if (b.is_defined ()) |
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126 { |
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127 profiler::enter<tree_binary_expression> |
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128 block (tw.get_profiler (), *this); |
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129 |
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130 // Note: The profiler does not catch the braindead |
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131 // short-circuit evaluation code above, but that should be |
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132 // ok. The evaluation of operands and the operator itself |
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133 // is entangled and it's not clear where to start/stop |
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134 // timing the operator to make it reasonable. |
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135 |
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136 interpreter& interp = tw.get_interpreter (); |
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137 |
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138 type_info& ti = interp.get_type_info (); |
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139 |
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140 val = ::do_binary_op (ti, m_etype, a, b); |
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141 } |
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142 } |
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143 } |
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144 |
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145 return val; |
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146 } |
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147 |
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148 // Boolean expressions. |
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150 std::string |
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151 tree_boolean_expression::oper (void) const |
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152 { |
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153 std::string retval = "<unknown>"; |
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154 |
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155 switch (m_etype) |
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156 { |
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157 case bool_and: |
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158 retval = "&&"; |
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159 break; |
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160 |
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161 case bool_or: |
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162 retval = "||"; |
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163 break; |
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164 |
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165 default: |
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166 break; |
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167 } |
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168 |
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169 return retval; |
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170 } |
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171 |
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172 tree_expression * |
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173 tree_boolean_expression::dup (symbol_scope& scope) const |
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174 { |
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175 tree_boolean_expression *new_be |
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176 = new tree_boolean_expression (m_lhs ? m_lhs->dup (scope) : nullptr, |
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177 m_rhs ? m_rhs->dup (scope) : nullptr, |
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178 line (), column (), m_etype); |
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179 |
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180 new_be->copy_base (*this); |
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181 |
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182 return new_be; |
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183 } |
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184 |
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185 octave_value |
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186 tree_boolean_expression::evaluate (tree_evaluator& tw, int) |
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187 { |
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188 octave_value val; |
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189 |
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190 bool result = false; |
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191 |
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192 // This evaluation is not caught by the profiler, since we can't find |
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193 // a reasonable place where to time. Note that we don't want to |
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194 // include evaluation of LHS or RHS into the timing, but this is |
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195 // entangled together with short-circuit evaluation here. |
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196 |
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197 if (m_lhs) |
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198 { |
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199 octave_value a = m_lhs->evaluate (tw); |
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200 |
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201 bool a_true = a.is_true (); |
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202 |
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203 if (a_true) |
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204 { |
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205 if (m_etype == tree_boolean_expression::bool_or) |
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206 return octave_value (true); |
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207 } |
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208 else |
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209 { |
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210 if (m_etype == tree_boolean_expression::bool_and) |
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211 return octave_value (false); |
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212 } |
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213 |
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214 if (m_rhs) |
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215 { |
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216 octave_value b = m_rhs->evaluate (tw); |
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217 |
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218 result = b.is_true (); |
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219 } |
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220 |
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221 val = octave_value (result); |
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222 } |
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223 |
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224 return val; |
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225 } |
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