octave: src/pt-binop.cc annotate

annotate src/pt-binop.cc @ 11572:7d6d8c1e471f

Grammarcheck Texinfo for files in src directory.

author	Rik <octave@nomad.inbox5.com>
date	Wed, 19 Jan 2011 17:51:22 -0800
parents	fd0a3ac60b0e
children	12df7854fa7c

rev	line source
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	1 /*
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	2
11523 fd0a3ac60b0e update copyright notices John W. Eaton <jwe@octave.org> parents: 11091 diff changeset	3 Copyright (C) 1996-2011 John W. Eaton
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	4
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	5 This file is part of Octave.
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	6
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	7 Octave is free software; you can redistribute it and/or modify it
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	8 under the terms of the GNU General Public License as published by the
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 5861 diff changeset	9 Free Software Foundation; either version 3 of the License, or (at your
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 5861 diff changeset	10 option) any later version.
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	11
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	12 Octave is distributed in the hope that it will be useful, but WITHOUT
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	15 for more details.
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	16
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	17 You should have received a copy of the GNU General Public License
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 5861 diff changeset	18 along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 5861 diff changeset	19 <http://www.gnu.org/licenses/>.
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	20
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	21 */
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	22
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	23 #ifdef HAVE_CONFIG_H
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	24 #include <config.h>
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	25 #endif
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	26
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	27 #include "error.h"
11091 5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	28 #include "defun.h"
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	29 #include "oct-obj.h"
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	30 #include "ov.h"
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	31 #include "pt-binop.h"
3770 bf6116ca10eb [project @ 2001-02-02 02:21:40 by jwe] jwe parents: 3536 diff changeset	32 #include "pt-bp.h"
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	33 #include "pt-walk.h"
11091 5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	34 #include "variables.h"
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	35
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	36 // TRUE means we mark \| and & expressions for braindead short-circuit
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	37 // behavior.
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	38 static bool Vdo_braindead_shortcircuit_evaluation;
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	39
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	40 // Binary expressions.
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	41
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	42 octave_value_list
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	43 tree_binary_expression::rvalue (int nargout)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	44 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	45 octave_value_list retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	46
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	47 if (nargout > 1)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	48 error ("binary operator `%s': invalid number of output arguments",
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	49 oper () . c_str ());
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	50 else
8658 73c4516fae10 New evaluator and debugger derived from tree-walker class John W. Eaton <jwe@octave.org> parents: 8011 diff changeset	51 retval = rvalue1 (nargout);
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	52
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	53 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	54 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	55
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	56 octave_value
8658 73c4516fae10 New evaluator and debugger derived from tree-walker class John W. Eaton <jwe@octave.org> parents: 8011 diff changeset	57 tree_binary_expression::rvalue1 (int)
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	58 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	59 octave_value retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	60
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	61 if (error_state)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	62 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	63
11091 5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	64 if (Vdo_braindead_shortcircuit_evaluation
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	65 && eligible_for_braindead_shortcircuit)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	66 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	67 if (op_lhs)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	68 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	69 octave_value a = op_lhs->rvalue1 ();
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	70
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	71 if (! error_state)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	72 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	73 if (a.ndims () == 2 && a.rows () == 1 && a.columns () == 1)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	74 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	75 bool result = false;
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	76
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	77 bool a_true = a.is_true ();
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	78
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	79 if (! error_state)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	80 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	81 if (a_true)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	82 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	83 if (etype == octave_value::op_el_or)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	84 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	85 result = true;
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	86 goto done;
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	87 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	88 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	89 else
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	90 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	91 if (etype == octave_value::op_el_and)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	92 goto done;
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	93 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	94
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	95 if (op_rhs)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	96 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	97 octave_value b = op_rhs->rvalue1 ();
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	98
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	99 if (! error_state)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	100 result = b.is_true ();
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	101 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	102
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	103 done:
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	104
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	105 if (! error_state)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	106 return octave_value (result);
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	107 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	108 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	109 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	110 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	111 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	112
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	113 if (op_lhs)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	114 {
8658 73c4516fae10 New evaluator and debugger derived from tree-walker class John W. Eaton <jwe@octave.org> parents: 8011 diff changeset	115 octave_value a = op_lhs->rvalue1 ();
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	116
8011 3100283874d7 improve backtrace error messages John W. Eaton <jwe@octave.org> parents: 7767 diff changeset	117 if (! error_state && a.is_defined () && op_rhs)
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	118 {
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	119 octave_value b = op_rhs->rvalue1 ();
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	120
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	121 if (! error_state && b.is_defined ())
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	122 {
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	123 retval = ::do_binary_op (etype, a, b);
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	124
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	125 if (error_state)
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	126 retval = octave_value ();
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	127 }
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	128 }
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	129 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	130
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	131 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	132 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	133
3536 e8fbc8c3d6d9 [project @ 2000-02-02 12:01:00 by jwe] jwe parents: 3534 diff changeset	134 std::string
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	135 tree_binary_expression::oper (void) const
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	136 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	137 return octave_value::binary_op_as_string (etype);
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	138 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	139
5861 2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	140 tree_expression *
7767 71f068b22fcc scope and context fixes for function handles John W. Eaton <jwe@octave.org> parents: 7336 diff changeset	141 tree_binary_expression::dup (symbol_table::scope_id scope,
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	142 symbol_table::context_id context) const
5861 2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	143 {
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	144 tree_binary_expression *new_be
7767 71f068b22fcc scope and context fixes for function handles John W. Eaton <jwe@octave.org> parents: 7336 diff changeset	145 = new tree_binary_expression (op_lhs ? op_lhs->dup (scope, context) : 0,
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	146 op_rhs ? op_rhs->dup (scope, context) : 0,
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	147 line (), column (), etype);
5861 2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	148
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	149 new_be->copy_base (*this);
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	150
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	151 return new_be;
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	152 }
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	153
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	154 void
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	155 tree_binary_expression::accept (tree_walker& tw)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	156 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	157 tw.visit_binary_expression (*this);
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	158 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	159
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	160 // Boolean expressions.
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	161
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	162 octave_value_list
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	163 tree_boolean_expression::rvalue (int nargout)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	164 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	165 octave_value_list retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	166
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	167 if (nargout > 1)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	168 error ("binary operator `%s': invalid number of output arguments",
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	169 oper () . c_str ());
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	170 else
8658 73c4516fae10 New evaluator and debugger derived from tree-walker class John W. Eaton <jwe@octave.org> parents: 8011 diff changeset	171 retval = rvalue1 (nargout);
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	172
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	173 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	174 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	175
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	176 octave_value
8658 73c4516fae10 New evaluator and debugger derived from tree-walker class John W. Eaton <jwe@octave.org> parents: 8011 diff changeset	177 tree_boolean_expression::rvalue1 (int)
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	178 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	179 octave_value retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	180
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	181 if (error_state)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	182 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	183
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	184 bool result = false;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	185
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	186 if (op_lhs)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	187 {
8658 73c4516fae10 New evaluator and debugger derived from tree-walker class John W. Eaton <jwe@octave.org> parents: 8011 diff changeset	188 octave_value a = op_lhs->rvalue1 ();
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	189
8011 3100283874d7 improve backtrace error messages John W. Eaton <jwe@octave.org> parents: 7767 diff changeset	190 if (! error_state)
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	191 {
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	192 bool a_true = a.is_true ();
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	193
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	194 if (! error_state)
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	195 {
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	196 if (a_true)
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	197 {
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	198 if (etype == bool_or)
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	199 {
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	200 result = true;
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	201 goto done;
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	202 }
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	203 }
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	204 else
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	205 {
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	206 if (etype == bool_and)
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	207 goto done;
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	208 }
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	209
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	210 if (op_rhs)
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	211 {
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	212 octave_value b = op_rhs->rvalue1 ();
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	213
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	214 if (! error_state)
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	215 result = b.is_true ();
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	216 }
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	217
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	218 done:
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	219
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	220 if (! error_state)
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	221 retval = octave_value (result);
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	222 }
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	223 }
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	224 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	225
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	226 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	227 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	228
3536 e8fbc8c3d6d9 [project @ 2000-02-02 12:01:00 by jwe] jwe parents: 3534 diff changeset	229 std::string
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	230 tree_boolean_expression::oper (void) const
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	231 {
3523 b80bbb43a1a9 [project @ 2000-02-02 10:25:52 by jwe] jwe parents: 2982 diff changeset	232 std::string retval = "<unknown>";
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	233
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	234 switch (etype)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	235 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	236 case bool_and:
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	237 retval = "&&";
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	238 break;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	239
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	240 case bool_or:
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	241 retval = "\|\|";
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	242 break;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	243
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	244 default:
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	245 break;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	246 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	247
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	248 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	249 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: diff changeset	250
5861 2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	251 tree_expression *
7767 71f068b22fcc scope and context fixes for function handles John W. Eaton <jwe@octave.org> parents: 7336 diff changeset	252 tree_boolean_expression::dup (symbol_table::scope_id scope,
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	253 symbol_table::context_id context) const
5861 2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	254 {
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	255 tree_boolean_expression *new_be
7767 71f068b22fcc scope and context fixes for function handles John W. Eaton <jwe@octave.org> parents: 7336 diff changeset	256 = new tree_boolean_expression (op_lhs ? op_lhs->dup (scope, context) : 0,
10315 57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	257 op_rhs ? op_rhs->dup (scope, context) : 0,
57a59eae83cc untabify src C++ source files John W. Eaton <jwe@octave.org> parents: 10160 diff changeset	258 line (), column (), etype);
5861 2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	259
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	260 new_be->copy_base (*this);
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	261
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	262 return new_be;
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	263 }
11091 5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	264
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	265 DEFUN (do_braindead_shortcircuit_evaluation, args, nargout,
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	266 "-- texinfo --\n\
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	267 @deftypefn {Built-in Function} {@var{val} =} do_braindead_shortcircuit_evaluation ()\n\
11572 7d6d8c1e471f Grammarcheck Texinfo for files in src directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	268 @deftypefnx {Built-in Function} {@var{old_val} =} do_braindead_shortcircuit_evaluation (@var{new_val})\n\
11091 5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	269 Query or set the internal variable that controls whether Octave will\n\
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	270 do short-circuit evaluation of @samp{\|} and @samp{&} operators inside the\n\
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	271 conditions of if or while statements.\n\
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	272 \n\
11572 7d6d8c1e471f Grammarcheck Texinfo for files in src directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	273 This feature is only provided for compatibility with @sc{matlab} and should\n\
11091 5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	274 not be used unless you are porting old code that relies on this feature.\n\
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	275 \n\
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	276 To obtain short-circuit behavior for logical expressions in new programs,\n\
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	277 you should always use the @samp{&&} and @samp{\|\|} operators.\n\
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	278 @end deftypefn")
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	279 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	280 return SET_INTERNAL_VARIABLE (do_braindead_shortcircuit_evaluation);
5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10315 diff changeset	281 }

Mercurial > octave

annotate src/pt-binop.cc @ 11572:7d6d8c1e471f