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annotate libinterp/parse-tree/pt-decl.cc @ 20624:7c0e10f035bd

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Extend parser to accept binary constants that begin with '0b' or '0B'. * NEWS: Announce change: * lex.ll: Define NUMBIN to be 0[bB] followed by 0,1, or '_'. Define NUMBER to be NUMREAL|NUMHEX|NUMBIN. *lex.ll (looks_like_bin): New function to detect 0[bB] prefix. *lex.ll (handle_numbe): Call looks_like_bin() and if found then convert binary string to double. * parser.tst: Add tests for new behavior.
author Rik <rik@octave.org>
date Fri, 09 Oct 2015 18:52:58 -0700
parents f90c8372b7ba
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996-2015 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "defun.h"
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28 #include "error.h"
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29 #include "pt-cmd.h"
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30 #include "ov.h"
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31 #include "oct-lvalue.h"
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32 #include "pt-bp.h"
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33 #include "pt-decl.h"
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34 #include "pt-exp.h"
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35 #include "pt-id.h"
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36 #include "pt-walk.h"
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37 #include "utils.h"
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38 #include "variables.h"
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39
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40 // Declarations (global, static, etc.).
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41
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42 tree_decl_elt::~tree_decl_elt (void)
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43 {
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44 delete id;
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45 delete expr;
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46 }
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47
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48 bool
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49 tree_decl_elt::eval (void)
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50 {
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51 bool retval = false;
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52
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53 if (id && expr)
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54 {
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55 octave_lvalue ult = id->lvalue ();
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56
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57 octave_value init_val = expr->rvalue1 ();
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58
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59 ult.assign (octave_value::op_asn_eq, init_val);
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60
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61 retval = true;
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62 }
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63
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64 return retval;
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65 }
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66
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67 tree_decl_elt *
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68 tree_decl_elt::dup (symbol_table::scope_id scope,
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69 symbol_table::context_id context) const
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70 {
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71 return new tree_decl_elt (id ? id->dup (scope, context) : 0,
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72 expr ? expr->dup (scope, context) : 0);
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73 }
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74
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75 void
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76 tree_decl_elt::accept (tree_walker& tw)
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77 {
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78 tw.visit_decl_elt (*this);
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79 }
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80
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81 // Initializer lists for declaration statements.
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82
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83 tree_decl_init_list *
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84 tree_decl_init_list::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 tree_decl_init_list *new_dil = new tree_decl_init_list ();
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88
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89 for (const_iterator p = begin (); p != end (); p++)
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90 {
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91 const tree_decl_elt *elt = *p;
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92
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93 new_dil->append (elt ? elt->dup (scope, context) : 0);
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94 }
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95
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96 return new_dil;
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97 }
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98
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99 void
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100 tree_decl_init_list::accept (tree_walker& tw)
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101 {
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102 tw.visit_decl_init_list (*this);
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103 }
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104
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105 // Base class for declaration commands (global, static).
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106
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107 tree_decl_command::~tree_decl_command (void)
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108 {
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109 delete init_list;
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110 }
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111
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112 // Global.
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113
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114 tree_command *
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115 tree_global_command::dup (symbol_table::scope_id scope,
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116 symbol_table::context_id context) const
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117 {
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118 return
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119 new tree_global_command (init_list ? init_list->dup (scope, context) : 0,
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120 line (), column ());
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121 }
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122
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123 void
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124 tree_global_command::accept (tree_walker& tw)
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125 {
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126 tw.visit_global_command (*this);
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127 }
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128
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129 // Static.
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130
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131 tree_command *
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132 tree_persistent_command::dup (symbol_table::scope_id scope,
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133 symbol_table::context_id context) const
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134 {
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135 return
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136 new tree_persistent_command (init_list ? init_list->dup (scope, context)
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137 : 0,
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138 line (), column ());
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139 }
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140
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141 void
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142 tree_persistent_command::accept (tree_walker& tw)
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143 {
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144 tw.visit_persistent_command (*this);
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145 }