Mercurial > octave-nkf
annotate src/pt-unop.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, 1998, 2000, 2001, 2002, 2004, 2005, 2006, |
| 4 2007 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 "oct-lvalue.h" | |
| 31 #include "ov.h" | |
| 3770 | 32 #include "pt-bp.h" |
| 2980 | 33 #include "pt-unop.h" |
| 34 #include "pt-walk.h" | |
| 35 | |
| 3203 | 36 // Unary expressions. |
| 37 | |
| 3536 | 38 std::string |
| 3203 | 39 tree_unary_expression::oper (void) const |
| 40 { | |
| 41 return octave_value::unary_op_as_string (etype); | |
| 42 } | |
| 43 | |
| 2980 | 44 // Prefix expressions. |
| 45 | |
| 46 octave_value_list | |
| 47 tree_prefix_expression::rvalue (int nargout) | |
| 48 { | |
| 49 octave_value_list retval; | |
| 50 | |
| 51 if (nargout > 1) | |
| 52 error ("prefix operator `%s': invalid number of output arguments", | |
| 53 oper () . c_str ()); | |
| 54 else | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
55 retval = rvalue1 (nargout); |
| 2980 | 56 |
| 57 return retval; | |
| 58 } | |
| 59 | |
| 60 octave_value | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
61 tree_prefix_expression::rvalue1 (int) |
| 2980 | 62 { |
| 63 octave_value retval; | |
| 64 | |
| 65 if (error_state) | |
| 66 return retval; | |
| 67 | |
| 68 if (op) | |
| 69 { | |
| 3539 | 70 if (etype == octave_value::op_incr || etype == octave_value::op_decr) |
| 3203 | 71 { |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
72 op->rvalue1 (); |
| 3962 | 73 |
| 74 if (! error_state) | |
| 75 { | |
| 76 octave_lvalue ref = op->lvalue (); | |
| 3203 | 77 |
| 3962 | 78 if (! error_state && ref.is_defined ()) |
| 79 { | |
| 80 ref.do_unary_op (etype); | |
| 3203 | 81 |
| 3962 | 82 retval = ref.value (); |
| 83 } | |
| 3203 | 84 } |
| 85 } | |
| 86 else | |
| 2980 | 87 { |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
88 octave_value val = op->rvalue1 (); |
| 2980 | 89 |
| 3962 | 90 if (! error_state && val.is_defined ()) |
| 2980 | 91 { |
| 3203 | 92 retval = ::do_unary_op (etype, val); |
| 2980 | 93 |
| 3203 | 94 if (error_state) |
|
8011
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
95 retval = octave_value (); |
| 2980 | 96 } |
| 97 } | |
| 98 } | |
| 99 | |
| 100 return retval; | |
| 101 } | |
| 102 | |
| 5861 | 103 tree_expression * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
104 tree_prefix_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
|
105 symbol_table::context_id context) |
| 5861 | 106 { |
| 107 tree_prefix_expression *new_pe | |
|
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71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
108 = new tree_prefix_expression (op ? op->dup (scope, context) : 0, |
| 5861 | 109 line (), column (), etype); |
| 110 | |
| 111 new_pe->copy_base (*this); | |
| 112 | |
| 113 return new_pe; | |
| 114 } | |
| 115 | |
| 2980 | 116 void |
| 117 tree_prefix_expression::accept (tree_walker& tw) | |
| 118 { | |
| 119 tw.visit_prefix_expression (*this); | |
| 120 } | |
| 121 | |
| 122 // Postfix expressions. | |
| 123 | |
| 124 octave_value_list | |
| 125 tree_postfix_expression::rvalue (int nargout) | |
| 126 { | |
| 127 octave_value_list retval; | |
| 128 | |
| 129 if (nargout > 1) | |
| 130 error ("postfix operator `%s': invalid number of output arguments", | |
| 131 oper () . c_str ()); | |
| 132 else | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
133 retval = rvalue1 (nargout); |
| 2980 | 134 |
| 135 return retval; | |
| 136 } | |
| 137 | |
| 138 octave_value | |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
139 tree_postfix_expression::rvalue1 (int) |
| 2980 | 140 { |
| 141 octave_value retval; | |
| 142 | |
| 143 if (error_state) | |
| 144 return retval; | |
| 145 | |
| 146 if (op) | |
| 147 { | |
| 3539 | 148 if (etype == octave_value::op_incr || etype == octave_value::op_decr) |
| 3203 | 149 { |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
150 op->rvalue1 (); |
| 3962 | 151 |
| 152 if (! error_state) | |
| 153 { | |
| 154 octave_lvalue ref = op->lvalue (); | |
| 3203 | 155 |
| 3962 | 156 if (! error_state && ref.is_defined ()) |
| 157 { | |
| 158 retval = ref.value (); | |
| 3203 | 159 |
| 3962 | 160 ref.do_unary_op (etype); |
| 161 } | |
| 3203 | 162 } |
| 163 } | |
| 164 else | |
| 2980 | 165 { |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
166 octave_value val = op->rvalue1 (); |
| 2980 | 167 |
| 3962 | 168 if (! error_state && val.is_defined ()) |
| 2980 | 169 { |
| 3203 | 170 retval = ::do_unary_op (etype, val); |
| 2980 | 171 |
| 3203 | 172 if (error_state) |
|
8011
3100283874d7
improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents:
7767
diff
changeset
|
173 retval = octave_value (); |
| 2980 | 174 } |
| 175 } | |
| 176 } | |
| 177 | |
| 178 return retval; | |
| 179 } | |
| 180 | |
| 5861 | 181 tree_expression * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
182 tree_postfix_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
|
183 symbol_table::context_id context) |
| 5861 | 184 { |
| 185 tree_postfix_expression *new_pe | |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
186 = new tree_postfix_expression (op ? op->dup (scope, context) : 0, |
| 5861 | 187 line (), column (), etype); |
| 188 | |
| 189 new_pe->copy_base (*this); | |
| 190 | |
| 191 return new_pe; | |
| 192 } | |
| 193 | |
| 2980 | 194 void |
| 195 tree_postfix_expression::accept (tree_walker& tw) | |
| 196 { | |
| 197 tw.visit_postfix_expression (*this); | |
| 198 } | |
| 199 | |
| 200 /* | |
| 201 ;;; Local Variables: *** | |
| 202 ;;; mode: C++ *** | |
| 203 ;;; End: *** | |
| 204 */ |