annotate src/pt-binop.h @ 8913:35cd375d4bb3

make tree::dup functions const
author John W. Eaton <jwe@octave.org>
date Thu, 05 Mar 2009 13:50:25 -0500
parents 73c4516fae10
children eb63fbe60fab
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1 /*
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2
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3 Copyright (C) 1996, 1997, 2000, 2002, 2003, 2004, 2005, 2006, 2007
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4 John W. Eaton
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #if !defined (octave_tree_binop_h)
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25 #define octave_tree_binop_h 1
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26
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27 #include <string>
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28
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29 class tree_walker;
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30
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31 class octave_value;
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32 class octave_value_list;
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33 class octave_lvalue;
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34
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35 #include "ov.h"
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36 #include "pt-exp.h"
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37 #include "symtab.h"
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38
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39 // Binary expressions.
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40
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41 class
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42 tree_binary_expression : public tree_expression
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43 {
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44 public:
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45
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46 tree_binary_expression (int l = -1, int c = -1,
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47 octave_value::binary_op t
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48 = octave_value::unknown_binary_op)
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49 : tree_expression (l, c), op_lhs (0), op_rhs (0), etype (t) { }
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50
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51 tree_binary_expression (tree_expression *a, tree_expression *b,
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52 int l = -1, int c = -1,
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53 octave_value::binary_op t
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54 = octave_value::unknown_binary_op)
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55 : tree_expression (l, c), op_lhs (a), op_rhs (b), etype (t) { }
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56
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57 ~tree_binary_expression (void)
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58 {
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59 delete op_lhs;
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60 delete op_rhs;
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61 }
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62
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63 bool has_magic_end (void) const
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64 {
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65 return ((op_lhs && op_lhs->has_magic_end ())
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66 || (op_rhs && op_rhs->has_magic_end ()));
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67 }
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68
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69 bool is_binary_expression (void) const { return true; }
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70
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71 bool rvalue_ok (void) const { return true; }
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72
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73 octave_value rvalue1 (int nargout = 1);
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74
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75 octave_value_list rvalue (int nargout);
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76
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77 std::string oper (void) const;
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78
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79 octave_value::binary_op op_type (void) const { return etype; }
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80
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81 tree_expression *lhs (void) { return op_lhs; }
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82 tree_expression *rhs (void) { return op_rhs; }
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83
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84 tree_expression *dup (symbol_table::scope_id scope,
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85 symbol_table::context_id context) const;
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86
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87 void accept (tree_walker& tw);
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88
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89 protected:
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90
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91 // The operands for the expression.
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92 tree_expression *op_lhs;
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93 tree_expression *op_rhs;
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94
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95 private:
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96
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97 // The type of the expression.
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98 octave_value::binary_op etype;
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99
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100 // No copying!
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101
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102 tree_binary_expression (const tree_binary_expression&);
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103
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104 tree_binary_expression& operator = (const tree_binary_expression&);
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105 };
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106
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107 // Boolean expressions.
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108
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109 class
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110 tree_boolean_expression : public tree_binary_expression
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111 {
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112 public:
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113
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114 enum type
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115 {
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116 unknown,
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117 bool_and,
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118 bool_or
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119 };
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120
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121 tree_boolean_expression (int l = -1, int c = -1, type t = unknown)
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122 : tree_binary_expression (l, c), etype (t) { }
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123
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124 tree_boolean_expression (tree_expression *a, tree_expression *b,
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125 int l = -1, int c = -1, type t = unknown)
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126 : tree_binary_expression (a, b, l, c), etype (t) { }
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127
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128 ~tree_boolean_expression (void) { }
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129
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130 bool is_boolean_expression (void) const { return true; }
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131
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132 bool rvalue_ok (void) const { return true; }
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133
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134 octave_value rvalue1 (int nargout = 1);
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135
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136 octave_value_list rvalue (int nargout);
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137
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138 std::string oper (void) const;
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139
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140 type op_type (void) const { return etype; }
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141
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142 tree_expression *dup (symbol_table::scope_id scope,
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143 symbol_table::context_id context) const;
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144
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145 private:
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146
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147 // The type of the expression.
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148 type etype;
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149
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150 // No copying!
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151
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152 tree_boolean_expression (const tree_boolean_expression&);
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153
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154 tree_boolean_expression& operator = (const tree_boolean_expression&);
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155 };
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156
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157 #endif
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158
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159 /*
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160 ;;; Local Variables: ***
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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161 ;;; mode: C++ ***
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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162 ;;; End: ***
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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163 */