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annotate libinterp/parse-tree/pt-binop.h @ 29358:0a5b15007766 stable

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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2021.
author John W. Eaton <jwe@octave.org>
date Wed, 10 Feb 2021 09:52:15 -0500
parents 2219b0ed8754
children 91c6288781ba 796f54d4ddbf
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2021 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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25
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26 #if ! defined (octave_pt_binop_h)
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27 #define octave_pt_binop_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <string>
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32
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33 class octave_value;
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34 class octave_value_list;
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35
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36 #include "ov.h"
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37 #include "pt-exp.h"
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38 #include "pt-walk.h"
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39
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40 namespace octave
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41 {
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42 class symbol_scope;
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43
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44 // Binary expressions.
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45
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46 class tree_binary_expression : public tree_expression
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47 {
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48 public:
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49
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50 tree_binary_expression (int l = -1, int c = -1,
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51 octave_value::binary_op t
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52 = octave_value::unknown_binary_op)
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53 : tree_expression (l, c), m_lhs (nullptr), m_rhs (nullptr), m_etype (t),
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54 m_eligible_for_braindead_shortcircuit (false),
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55 m_braindead_shortcircuit_warning_issued (false) { }
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56
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57 tree_binary_expression (tree_expression *a, tree_expression *b,
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58 int l = -1, int c = -1,
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59 octave_value::binary_op t
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60 = octave_value::unknown_binary_op)
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61 : tree_expression (l, c), m_lhs (a), m_rhs (b), m_etype (t),
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62 m_eligible_for_braindead_shortcircuit (false),
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63 m_braindead_shortcircuit_warning_issued (false) { }
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64
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65 // No copying!
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66
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67 tree_binary_expression (const tree_binary_expression&) = delete;
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68
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69 tree_binary_expression& operator = (const tree_binary_expression&) = delete;
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70
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71 ~tree_binary_expression (void)
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72 {
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73 delete m_lhs;
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74 delete m_rhs;
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75 }
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76
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77 void mark_braindead_shortcircuit (void)
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78 {
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79 if (m_etype == octave_value::op_el_and || m_etype == octave_value::op_el_or)
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80 {
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81 m_eligible_for_braindead_shortcircuit = true;
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82
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83 m_lhs->mark_braindead_shortcircuit ();
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84 m_rhs->mark_braindead_shortcircuit ();
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85 }
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86 }
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87
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88 bool is_binary_expression (void) const { return true; }
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89
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90 bool rvalue_ok (void) const { return true; }
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91
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92 std::string oper (void) const;
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93
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94 octave_value::binary_op op_type (void) const { return m_etype; }
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95
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96 tree_expression * lhs (void) { return m_lhs; }
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97 tree_expression * rhs (void) { return m_rhs; }
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98
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99 bool is_eligible_for_braindead_shortcircuit (void) const
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100 {
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101 return m_eligible_for_braindead_shortcircuit;
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102 }
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103
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104 tree_expression * dup (symbol_scope& scope) const;
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105
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106 octave_value evaluate (tree_evaluator&, int nargout = 1);
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107
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108 octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1)
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109 {
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110 return ovl (evaluate (tw, nargout));
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111 }
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112
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113 void accept (tree_walker& tw)
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114 {
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115 tw.visit_binary_expression (*this);
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116 }
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117
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118 std::string profiler_name (void) const { return "binary " + oper (); }
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119
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120 void matlab_style_short_circuit_warning (const char *op);
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121
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122 protected:
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123
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124 // The operands for the expression.
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125 tree_expression *m_lhs;
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126 tree_expression *m_rhs;
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127
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128 private:
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129
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130 // The type of the expression.
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131 octave_value::binary_op m_etype;
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132
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133 // TRUE if this is an | or & expression in the condition of an IF
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134 // or WHILE statement.
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135 bool m_eligible_for_braindead_shortcircuit;
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136
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137 // TRUE if we have already issued a warning about short circuiting
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138 // for this operator.
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139 bool m_braindead_shortcircuit_warning_issued;
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140 };
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141
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142 // Boolean expressions.
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143
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144 class tree_boolean_expression : public tree_binary_expression
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145 {
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146 public:
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147
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148 enum type
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149 {
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150 unknown,
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151 bool_and,
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152 bool_or
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153 };
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154
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155 tree_boolean_expression (int l = -1, int c = -1, type t = unknown)
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156 : tree_binary_expression (l, c), m_etype (t) { }
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157
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158 tree_boolean_expression (tree_expression *a, tree_expression *b,
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159 int l = -1, int c = -1, type t = unknown)
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160 : tree_binary_expression (a, b, l, c), m_etype (t) { }
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161
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162 // No copying!
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163
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164 tree_boolean_expression (const tree_boolean_expression&) = delete;
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165
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166 tree_boolean_expression& operator = (const tree_boolean_expression&) = delete;
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167
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168 ~tree_boolean_expression (void) = default;
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169
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170 bool is_boolean_expression (void) const { return true; }
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171
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172 bool rvalue_ok (void) const { return true; }
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173
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174 std::string oper (void) const;
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175
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176 type op_type (void) const { return m_etype; }
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177
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178 tree_expression * dup (symbol_scope& scope) const;
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179
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180 octave_value evaluate (tree_evaluator&, int nargout = 1);
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181
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182 octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1)
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183 {
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184 return ovl (evaluate (tw, nargout));
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185 }
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186
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187 void accept (tree_walker& tw)
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188 {
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189 tw.visit_boolean_expression (*this);
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190 }
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191
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192 private:
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193
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194 // The type of the expression.
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195 type m_etype;
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196 };
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197 }
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198
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199 #endif