Mercurial > hg > octave-nkf
annotate src/pt-exp.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 | eb63fbe60fab |
| rev | line source |
|---|---|
| 1741 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 2000, 2002, 2004, 2005, 2007 John W. Eaton |
| 1741 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 1741 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 1741 | 20 |
| 21 */ | |
| 22 | |
| 23 #ifdef HAVE_CONFIG_H | |
| 24 #include <config.h> | |
| 25 #endif | |
| 26 | |
| 3503 | 27 #include <iostream> |
| 2980 | 28 #include <string> |
| 29 | |
| 1741 | 30 #include "error.h" |
| 2980 | 31 #include "pager.h" |
| 2979 | 32 #include "oct-lvalue.h" |
| 2388 | 33 #include "ov.h" |
| 1741 | 34 #include "pt-exp.h" |
| 35 | |
| 2980 | 36 // Expressions. |
| 2960 | 37 |
| 2980 | 38 bool |
| 39 tree_expression::is_logically_true (const char *warn_for) | |
| 1741 | 40 { |
| 2980 | 41 bool expr_value = false; |
| 2971 | 42 |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
43 octave_value t1 = rvalue1 (); |
| 2960 | 44 |
| 2980 | 45 if (! error_state) |
| 1741 | 46 { |
| 2980 | 47 if (t1.is_defined ()) |
| 48 return t1.is_true (); | |
| 2388 | 49 else |
| 2980 | 50 ::error ("%s: undefined value used in conditional expression", |
| 51 warn_for); | |
| 1741 | 52 } |
| 2388 | 53 |
| 2980 | 54 return expr_value; |
| 1741 | 55 } |
| 56 | |
| 2086 | 57 octave_value |
|
8658
73c4516fae10
New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents:
8011
diff
changeset
|
58 tree_expression::rvalue1 (int) |
| 1741 | 59 { |
| 2980 | 60 ::error ("invalid rvalue function called in expression"); |
| 61 return octave_value (); | |
| 2971 | 62 } |
| 63 | |
| 64 octave_value_list | |
| 2982 | 65 tree_expression::rvalue (int) |
| 2971 | 66 { |
| 2980 | 67 ::error ("invalid rvalue function called in expression"); |
| 68 return octave_value_list (); | |
| 2971 | 69 } |
| 70 | |
| 2979 | 71 octave_lvalue |
| 2980 | 72 tree_expression::lvalue (void) |
| 2971 | 73 { |
| 2980 | 74 ::error ("invalid lvalue function called in expression"); |
| 75 return octave_lvalue (); | |
| 2971 | 76 } |
| 77 | |
| 3536 | 78 std::string |
| 2980 | 79 tree_expression::original_text (void) const |
| 2971 | 80 { |
| 3523 | 81 return std::string (); |
| 2958 | 82 } |
| 83 | |
| 1741 | 84 /* |
| 85 ;;; Local Variables: *** | |
| 86 ;;; mode: C++ *** | |
| 87 ;;; End: *** | |
| 88 */ |