Mercurial > octave-nkf
annotate src/pt-binop.cc @ 7948:af10baa63915 ss-3-1-50
3.1.50 snapshot
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 18 Jul 2008 17:42:48 -0400 |
| parents | 71f068b22fcc |
| children | 3100283874d7 |
| 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 | |
| 46 retval = rvalue (); | |
| 47 | |
| 48 return retval; | |
| 49 } | |
| 50 | |
| 51 octave_value | |
| 52 tree_binary_expression::rvalue (void) | |
| 53 { | |
| 54 octave_value retval; | |
| 55 | |
| 3770 | 56 MAYBE_DO_BREAKPOINT; |
| 57 | |
| 2980 | 58 if (error_state) |
| 59 return retval; | |
| 60 | |
| 61 if (op_lhs) | |
| 62 { | |
| 63 octave_value a = op_lhs->rvalue (); | |
| 64 | |
| 65 if (error_state) | |
| 66 eval_error (); | |
| 67 else if (a.is_defined () && op_rhs) | |
| 68 { | |
| 69 octave_value b = op_rhs->rvalue (); | |
| 70 | |
| 71 if (error_state) | |
| 72 eval_error (); | |
| 73 else if (b.is_defined ()) | |
| 74 { | |
| 75 retval = ::do_binary_op (etype, a, b); | |
| 76 | |
| 77 if (error_state) | |
| 78 { | |
| 79 retval = octave_value (); | |
| 80 eval_error (); | |
| 81 } | |
| 82 } | |
| 83 else | |
| 84 eval_error (); | |
| 85 } | |
| 86 else | |
| 87 eval_error (); | |
| 88 } | |
| 89 else | |
| 90 eval_error (); | |
| 91 | |
| 92 return retval; | |
| 93 } | |
| 94 | |
| 95 void | |
| 96 tree_binary_expression::eval_error (void) | |
| 97 { | |
| 3965 | 98 ::error ("evaluating binary operator `%s' near line %d, column %d", |
| 99 oper () . c_str (), line (), column ()); | |
| 2980 | 100 } |
| 101 | |
| 3536 | 102 std::string |
| 2980 | 103 tree_binary_expression::oper (void) const |
| 104 { | |
| 105 return octave_value::binary_op_as_string (etype); | |
| 106 } | |
| 107 | |
| 5861 | 108 tree_expression * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
109 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
|
110 symbol_table::context_id context) |
| 5861 | 111 { |
| 112 tree_binary_expression *new_be | |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
113 = 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
|
114 op_rhs ? op_rhs->dup (scope, context) : 0, |
| 5861 | 115 line (), column (), etype); |
| 116 | |
| 117 new_be->copy_base (*this); | |
| 118 | |
| 119 return new_be; | |
| 120 } | |
| 121 | |
| 2980 | 122 void |
| 123 tree_binary_expression::accept (tree_walker& tw) | |
| 124 { | |
| 125 tw.visit_binary_expression (*this); | |
| 126 } | |
| 127 | |
| 128 // Boolean expressions. | |
| 129 | |
| 130 octave_value_list | |
| 131 tree_boolean_expression::rvalue (int nargout) | |
| 132 { | |
| 133 octave_value_list retval; | |
| 134 | |
| 3770 | 135 MAYBE_DO_BREAKPOINT; |
| 136 | |
| 2980 | 137 if (nargout > 1) |
| 138 error ("binary operator `%s': invalid number of output arguments", | |
| 139 oper () . c_str ()); | |
| 140 else | |
| 141 retval = rvalue (); | |
| 142 | |
| 143 return retval; | |
| 144 } | |
| 145 | |
| 146 octave_value | |
| 147 tree_boolean_expression::rvalue (void) | |
| 148 { | |
| 149 octave_value retval; | |
| 150 | |
| 151 if (error_state) | |
| 152 return retval; | |
| 153 | |
| 154 bool result = false; | |
| 155 | |
| 156 if (op_lhs) | |
| 157 { | |
| 158 octave_value a = op_lhs->rvalue (); | |
| 159 | |
| 160 if (error_state) | |
| 161 eval_error (); | |
| 162 else | |
| 163 { | |
| 164 bool a_true = a.is_true (); | |
| 165 | |
| 166 if (error_state) | |
| 167 eval_error (); | |
| 168 else | |
| 169 { | |
| 170 if (a_true) | |
| 171 { | |
| 172 if (etype == bool_or) | |
| 173 { | |
| 174 result = true; | |
| 175 goto done; | |
| 176 } | |
| 177 } | |
| 178 else | |
| 179 { | |
| 180 if (etype == bool_and) | |
| 181 goto done; | |
| 182 } | |
| 183 | |
| 184 if (op_rhs) | |
| 185 { | |
| 186 octave_value b = op_rhs->rvalue (); | |
| 187 | |
| 188 if (error_state) | |
| 189 eval_error (); | |
| 190 else | |
| 191 { | |
| 192 result = b.is_true (); | |
| 193 | |
| 194 if (error_state) | |
| 195 eval_error (); | |
| 196 } | |
| 197 } | |
| 198 else | |
| 199 eval_error (); | |
| 200 | |
| 201 done: | |
| 202 | |
| 203 if (! error_state) | |
| 3798 | 204 retval = octave_value (result); |
| 2980 | 205 } |
| 206 } | |
| 207 } | |
| 208 else | |
| 209 eval_error (); | |
| 210 | |
| 211 return retval; | |
| 212 } | |
| 213 | |
| 3536 | 214 std::string |
| 2980 | 215 tree_boolean_expression::oper (void) const |
| 216 { | |
| 3523 | 217 std::string retval = "<unknown>"; |
| 2980 | 218 |
| 219 switch (etype) | |
| 220 { | |
| 221 case bool_and: | |
| 222 retval = "&&"; | |
| 223 break; | |
| 224 | |
| 225 case bool_or: | |
| 226 retval = "||"; | |
| 227 break; | |
| 228 | |
| 229 default: | |
| 230 break; | |
| 231 } | |
| 232 | |
| 233 return retval; | |
| 234 } | |
| 235 | |
| 5861 | 236 tree_expression * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
237 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
|
238 symbol_table::context_id context) |
| 5861 | 239 { |
| 240 tree_boolean_expression *new_be | |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
241 = 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
|
242 op_rhs ? op_rhs->dup (scope, context) : 0, |
| 5861 | 243 line (), column (), etype); |
| 244 | |
| 245 new_be->copy_base (*this); | |
| 246 | |
| 247 return new_be; | |
| 248 } | |
| 249 | |
| 2980 | 250 /* |
| 251 ;;; Local Variables: *** | |
| 252 ;;; mode: C++ *** | |
| 253 ;;; End: *** | |
| 254 */ |