Mercurial > octave-nkf
annotate src/pt-binop.cc @ 8658:73c4516fae10
New evaluator and debugger derived from tree-walker class
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Wed, 04 Feb 2009 00:47:53 -0500 |
| parents | 3100283874d7 |
| children | 35cd375d4bb3 |
| rev | line source |
|---|---|
| 2980 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2004, 2005, 2006, 2007 |
| 4 John W. Eaton | |
| 2980 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 2980 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 2980 | 21 |
| 22 */ | |
| 23 | |
| 24 #ifdef HAVE_CONFIG_H | |
| 25 #include <config.h> | |
| 26 #endif | |
| 27 | |
| 28 #include "error.h" | |
| 29 #include "oct-obj.h" | |
| 30 #include "ov.h" | |
| 31 #include "pt-binop.h" | |
| 3770 | 32 #include "pt-bp.h" |
| 2980 | 33 #include "pt-walk.h" |
| 34 | |
| 35 // Binary expressions. | |
| 36 | |
| 37 octave_value_list | |
| 38 tree_binary_expression::rvalue (int nargout) | |
| 39 { | |
| 40 octave_value_list retval; | |
| 41 | |
| 42 if (nargout > 1) | |
| 43 error ("binary operator `%s': invalid number of output arguments", | |
| 44 oper () . c_str ()); | |
| 45 else | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
46 retval = rvalue1 (nargout); |
| 2980 | 47 |
| 48 return retval; | |
| 49 } | |
| 50 | |
| 51 octave_value | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
52 tree_binary_expression::rvalue1 (int) |
| 2980 | 53 { |
| 54 octave_value retval; | |
| 55 | |
| 56 if (error_state) | |
| 57 return retval; | |
| 58 | |
| 59 if (op_lhs) | |
| 60 { | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
61 octave_value a = op_lhs->rvalue1 (); |
| 2980 | 62 |
|
8011
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
63 if (! error_state && a.is_defined () && op_rhs) |
| 2980 | 64 { |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
65 octave_value b = op_rhs->rvalue1 (); |
| 2980 | 66 |
|
8011
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
67 if (! error_state && b.is_defined ()) |
| 2980 | 68 { |
| 69 retval = ::do_binary_op (etype, a, b); | |
| 70 | |
| 71 if (error_state) | |
|
8011
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
72 retval = octave_value (); |
| 2980 | 73 } |
| 74 } | |
| 75 } | |
| 76 | |
| 77 return retval; | |
| 78 } | |
| 79 | |
| 3536 | 80 std::string |
| 2980 | 81 tree_binary_expression::oper (void) const |
| 82 { | |
| 83 return octave_value::binary_op_as_string (etype); | |
| 84 } | |
| 85 | |
| 5861 | 86 tree_expression * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
87 tree_binary_expression::dup (symbol_table::scope_id scope, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
88 symbol_table::context_id context) |
| 5861 | 89 { |
| 90 tree_binary_expression *new_be | |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
91 = new tree_binary_expression (op_lhs ? op_lhs->dup (scope, context) : 0, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
92 op_rhs ? op_rhs->dup (scope, context) : 0, |
| 5861 | 93 line (), column (), etype); |
| 94 | |
| 95 new_be->copy_base (*this); | |
| 96 | |
| 97 return new_be; | |
| 98 } | |
| 99 | |
| 2980 | 100 void |
| 101 tree_binary_expression::accept (tree_walker& tw) | |
| 102 { | |
| 103 tw.visit_binary_expression (*this); | |
| 104 } | |
| 105 | |
| 106 // Boolean expressions. | |
| 107 | |
| 108 octave_value_list | |
| 109 tree_boolean_expression::rvalue (int nargout) | |
| 110 { | |
| 111 octave_value_list retval; | |
| 112 | |
| 113 if (nargout > 1) | |
| 114 error ("binary operator `%s': invalid number of output arguments", | |
| 115 oper () . c_str ()); | |
| 116 else | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
117 retval = rvalue1 (nargout); |
| 2980 | 118 |
| 119 return retval; | |
| 120 } | |
| 121 | |
| 122 octave_value | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
123 tree_boolean_expression::rvalue1 (int) |
| 2980 | 124 { |
| 125 octave_value retval; | |
| 126 | |
| 127 if (error_state) | |
| 128 return retval; | |
| 129 | |
| 130 bool result = false; | |
| 131 | |
| 132 if (op_lhs) | |
| 133 { | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
134 octave_value a = op_lhs->rvalue1 (); |
| 2980 | 135 |
|
8011
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
136 if (! error_state) |
| 2980 | 137 { |
| 138 bool a_true = a.is_true (); | |
| 139 | |
|
8011
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
140 if (! error_state) |
| 2980 | 141 { |
| 142 if (a_true) | |
| 143 { | |
| 144 if (etype == bool_or) | |
| 145 { | |
| 146 result = true; | |
| 147 goto done; | |
| 148 } | |
| 149 } | |
| 150 else | |
| 151 { | |
| 152 if (etype == bool_and) | |
| 153 goto done; | |
| 154 } | |
| 155 | |
| 156 if (op_rhs) | |
| 157 { | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
158 octave_value b = op_rhs->rvalue1 (); |
| 2980 | 159 |
|
8011
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
160 if (! error_state) |
|
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
161 result = b.is_true (); |
| 2980 | 162 } |
| 163 | |
| 164 done: | |
| 165 | |
| 166 if (! error_state) | |
| 3798 | 167 retval = octave_value (result); |
| 2980 | 168 } |
| 169 } | |
| 170 } | |
| 171 | |
| 172 return retval; | |
| 173 } | |
| 174 | |
| 3536 | 175 std::string |
| 2980 | 176 tree_boolean_expression::oper (void) const |
| 177 { | |
| 3523 | 178 std::string retval = "<unknown>"; |
| 2980 | 179 |
| 180 switch (etype) | |
| 181 { | |
| 182 case bool_and: | |
| 183 retval = "&&"; | |
| 184 break; | |
| 185 | |
| 186 case bool_or: | |
| 187 retval = "||"; | |
| 188 break; | |
| 189 | |
| 190 default: | |
| 191 break; | |
| 192 } | |
| 193 | |
| 194 return retval; | |
| 195 } | |
| 196 | |
| 5861 | 197 tree_expression * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
198 tree_boolean_expression::dup (symbol_table::scope_id scope, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
199 symbol_table::context_id context) |
| 5861 | 200 { |
| 201 tree_boolean_expression *new_be | |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
202 = new tree_boolean_expression (op_lhs ? op_lhs->dup (scope, context) : 0, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
203 op_rhs ? op_rhs->dup (scope, context) : 0, |
| 5861 | 204 line (), column (), etype); |
| 205 | |
| 206 new_be->copy_base (*this); | |
| 207 | |
| 208 return new_be; | |
| 209 } | |
| 210 | |
| 2980 | 211 /* |
| 212 ;;; Local Variables: *** | |
| 213 ;;; mode: C++ *** | |
| 214 ;;; End: *** | |
| 215 */ |