octave: libinterp/parse-tree/pt-exp.h annotate

annotate libinterp/parse-tree/pt-exp.h @ 31394:7781b1e77406

use separate class for braindead shortcircuit evaluation Change adapted from patch #10238 by Petter Tomner <tomner@kth.se>. * parse.h, oct-parse.yy (base_parser::maybe_convert_to_braindead_shortcircuit): New function. (if_cmd_list1, elseif_clause, loop_command): Use it to convert expressions that could be evaluated using Matlab-style short-circuit rules to be tree_braindead_shortcircuit_binary_expression objects instead of simple tree_binary_expression objects. * pt-exp.h (tree_expression::mark_braindead_shortcircuit): Delete. * pt-binop.h (tree_binary_expression::mark_braindead_shortcircuit): Delete. * pt-binop.h, pt-binop.cc (tree_braindead_shortcircuit_binary_expression): New class to evaluate Matlab-style short-circuit expressions. * pt-binop.h, pt-binop.cc (tree_binary_expression::preserve_operands): New function. (tree_binary_expression::m_preserve_operands): New private data member. (tree_binary_expression::m_eligible_for_braindead_shortcircuit): Delete data member. (tree_binary_expression::is_eligible_for_braindead_shortcircuit): Delete function. (tree_binary_expression::mark_braindead_shortcircuit): Delete function. (tree_binary_expression::~tree_binary_expression): Don't delete m_lhs or m_rhs if m_preserve_operands is true. (tree_binary_expression::evaluate): Don't check for or process Matlab-style short-circuit expressions here.

author	John W. Eaton <jwe@octave.org>
date	Thu, 03 Nov 2022 17:50:24 -0400
parents	97504d2edcc7
children	e88a07dec498

rev	line source
27923 bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	1 ////////////////////////////////////////////////////////////////////////
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	2 //
30564 796f54d4ddbf update Octave Project Developers copyright for the new year John W. Eaton <jwe@octave.org> parents: 30181 diff changeset	3 // Copyright (C) 1996-2022 The Octave Project Developers
27923 bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	4 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	5 // See the file COPYRIGHT.md in the top-level directory of this
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	6 // distribution or <https://octave.org/copyright/>.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	7 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	8 // This file is part of Octave.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	9 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	10 // Octave is free software: you can redistribute it and/or modify it
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	11 // under the terms of the GNU General Public License as published by
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	12 // the Free Software Foundation, either version 3 of the License, or
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	13 // (at your option) any later version.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	14 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	15 // Octave is distributed in the hope that it will be useful, but
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	16 // WITHOUT ANY WARRANTY; without even the implied warranty of
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	18 // GNU General Public License for more details.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	19 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	20 // You should have received a copy of the GNU General Public License
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	21 // along with Octave; see the file COPYING. If not, see
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	22 // <https://www.gnu.org/licenses/>.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	23 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	24 ////////////////////////////////////////////////////////////////////////
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	25
20791 f7084eae3318 maint: Use Octave coding conventions for #if statements. Rik <rik@octave.org> parents: 19697 diff changeset	26 #if ! defined (octave_pt_exp_h)
17822 ebb3ef964372 maint: Use common #define syntax "octave_filename_h" in h_files. Rik <rik@octave.org> parents: 17787 diff changeset	27 #define octave_pt_exp_h 1
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	28
21244 1473547f50f5 include octave-config.h in public header files John W. Eaton <jwe@octave.org> parents: 20791 diff changeset	29 #include "octave-config.h"
1473547f50f5 include octave-config.h in public header files John W. Eaton <jwe@octave.org> parents: 20791 diff changeset	30
2980 cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe] jwe parents: 2979 diff changeset	31 #include <string>
10832 1b2fcd122c6a allow user detect ignored outputs in m-functions Jaroslav Hajek <highegg@gmail.com> parents: 10313 diff changeset	32 #include <list>
2124 97a566037a75 [project @ 1996-05-12 07:16:36 by jwe] jwe parents: 2086 diff changeset	33
2879 4309724baab6 [project @ 1997-04-24 09:30:23 by jwe] jwe parents: 2859 diff changeset	34 class octave_value;
4309724baab6 [project @ 1997-04-24 09:30:23 by jwe] jwe parents: 2859 diff changeset	35
2988 daa1ed1f5462 [project @ 1997-05-16 07:23:15 by jwe] jwe parents: 2980 diff changeset	36 #include "pt.h"
27371 fcaecdbc8d8a don't use visitor pattern for expression evaluation (bug #56752) John W. Eaton <jwe@octave.org> parents: 26377 diff changeset	37 #include "pt-eval.h"
2124 97a566037a75 [project @ 1996-05-12 07:16:36 by jwe] jwe parents: 2086 diff changeset	38
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	39 namespace octave
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	40 {
24362 3fc24b792a24 avoid including symtab.h, symscope.h, or symrec.h unnecessarily John W. Eaton <jwe@octave.org> parents: 24355 diff changeset	41 class symbol_scope;
24355 cc3b3ceb155c update octave_lvalue class and move inside octave namespace John W. Eaton <jwe@octave.org> parents: 24270 diff changeset	42 class octave_lvalue;
23435 c452180ab672 begin refactoring parse tree evaluator John W. Eaton <jwe@octave.org> parents: 23220 diff changeset	43
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	44 // A base class for expressions.
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	45
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	46 class tree_expression : public tree
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	47 {
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	48 public:
2388 4be11abb8d8c [project @ 1996-10-12 18:53:51 by jwe] jwe parents: 2124 diff changeset	49
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	50 tree_expression (int l = -1, int c = -1)
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	51 : tree (l, c), m_num_parens (0), m_postfix_index_type ('\0'),
667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	52 m_for_cmd_expr (false), m_print_flag (false) { }
2388 4be11abb8d8c [project @ 1996-10-12 18:53:51 by jwe] jwe parents: 2124 diff changeset	53
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	54 // No copying!
2388 4be11abb8d8c [project @ 1996-10-12 18:53:51 by jwe] jwe parents: 2124 diff changeset	55
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	56 tree_expression (const tree_expression&) = delete;
4267 7cd865a8c815 [project @ 2003-01-03 15:27:05 by jwe] jwe parents: 4192 diff changeset	57
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	58 tree_expression& operator = (const tree_expression&) = delete;
5861 2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	59
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	60 virtual ~tree_expression (void) = default;
2388 4be11abb8d8c [project @ 1996-10-12 18:53:51 by jwe] jwe parents: 2124 diff changeset	61
24270 bc3819b7cca1 don't use symbol_table:: nesting for symbol_record, symbol_scope, or fcn_info John W. Eaton <jwe@octave.org> parents: 23696 diff changeset	62 virtual tree_expression * dup (symbol_scope& scope) const = 0;
2388 4be11abb8d8c [project @ 1996-10-12 18:53:51 by jwe] jwe parents: 2124 diff changeset	63
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	64 virtual bool is_constant (void) const { return false; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	65
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	66 virtual bool is_matrix (void) const { return false; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	67
23576 00e518162fda maint: Deprecate is_cell and replace with iscell. Rik <rik@octave.org> parents: 23446 diff changeset	68 virtual bool iscell (void) const { return false; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	69
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	70 virtual bool is_identifier (void) const { return false; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	71
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	72 virtual bool is_index_expression (void) const { return false; }
7800 5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm Jaroslav Hajek <highegg@gmail.com> parents: 7767 diff changeset	73
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	74 virtual bool is_assignment_expression (void) const { return false; }
4023 ef3caf27cb9c [project @ 2002-08-07 06:54:41 by jwe] jwe parents: 3933 diff changeset	75
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	76 virtual bool is_prefix_expression (void) const { return false; }
4023 ef3caf27cb9c [project @ 2002-08-07 06:54:41 by jwe] jwe parents: 3933 diff changeset	77
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	78 virtual bool is_unary_expression (void) const { return false; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	79
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	80 virtual bool is_binary_expression (void) const { return false; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	81
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	82 virtual bool is_boolean_expression (void) const { return false; }
2124 97a566037a75 [project @ 1996-05-12 07:16:36 by jwe] jwe parents: 2086 diff changeset	83
30833 449e26c26b41 new is_colon_expression predicate for parse tree expression objects John W. Eaton <jwe@octave.org> parents: 30564 diff changeset	84 virtual bool is_colon_expression (void) const { return false; }
449e26c26b41 new is_colon_expression predicate for parse tree expression objects John W. Eaton <jwe@octave.org> parents: 30564 diff changeset	85
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	86 virtual bool lvalue_ok (void) const { return false; }
2879 4309724baab6 [project @ 1997-04-24 09:30:23 by jwe] jwe parents: 2859 diff changeset	87
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	88 virtual bool rvalue_ok (void) const { return false; }
10832 1b2fcd122c6a allow user detect ignored outputs in m-functions Jaroslav Hajek <highegg@gmail.com> parents: 10313 diff changeset	89
25383 d3a035528c9a use reference to tree_evaluator instead of pointer John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	90 virtual octave_lvalue lvalue (tree_evaluator&);
2124 97a566037a75 [project @ 1996-05-12 07:16:36 by jwe] jwe parents: 2086 diff changeset	91
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	92 int paren_count (void) const { return m_num_parens; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	93
30346 91c6288781ba maint: Shorten some long lines in libinterp to <= 80 characters (bug #57599) Rik <rik@octave.org> parents: 30181 diff changeset	94 bool is_postfix_indexed (void) const
91c6288781ba maint: Shorten some long lines in libinterp to <= 80 characters (bug #57599) Rik <rik@octave.org> parents: 30181 diff changeset	95 { return (m_postfix_index_type != '\0'); }
15954 46ca8488de92 Re-engineer tree_expression postfix handling to make it more flexible. Michael Goffioul <michael.goffioul@gmail.com> parents: 15606 diff changeset	96
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	97 char postfix_index (void) const { return m_postfix_index_type; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	98
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	99 // Check if the result of the expression should be printed.
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	100 // Should normally be used in conjunction with
23696 08036a7f3660 remove octave:: namespace tag from symbols used inside octave namespace John W. Eaton <jwe@octave.org> parents: 23615 diff changeset	101 // tree_evaluator::statement_printing_enabled.
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	102 bool print_result (void) const { return m_print_flag; }
2124 97a566037a75 [project @ 1996-05-12 07:16:36 by jwe] jwe parents: 2086 diff changeset	103
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	104 virtual std::string oper (void) const { return "<unknown>"; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	105
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	106 virtual std::string name (void) const { return "<unknown>"; }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	107
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	108 virtual std::string original_text (void) const;
11091 5677f3f7b5fa Matlab compatible short-circuit behavior for & and \| operators John W. Eaton <jwe@octave.org> parents: 10832 diff changeset	109
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	110 void mark_as_for_cmd_expr (void) { m_for_cmd_expr = true; }
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	111
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	112 bool is_for_cmd_expr (void) const { return m_for_cmd_expr; }
19394 b39cbe9f3bb0 allow ranges to be disabled John W. Eaton <jwe@octave.org> parents: 18132 diff changeset	113
23446 cd4e1ee28716 maint: Use convention 'void * fcn ()' for functions which return pointers. Rik <rik@octave.org> parents: 23435 diff changeset	114 tree_expression * mark_in_parens (void)
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	115 {
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	116 m_num_parens++;
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	117 return this;
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	118 }
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	119
23446 cd4e1ee28716 maint: Use convention 'void * fcn ()' for functions which return pointers. Rik <rik@octave.org> parents: 23435 diff changeset	120 tree_expression * set_postfix_index (char type)
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	121 {
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	122 m_postfix_index_type = type;
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	123 return this;
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	124 }
2971 f2be17e6f1ea [project @ 1997-05-15 18:55:44 by jwe] jwe parents: 2960 diff changeset	125
23446 cd4e1ee28716 maint: Use convention 'void * fcn ()' for functions which return pointers. Rik <rik@octave.org> parents: 23435 diff changeset	126 tree_expression * set_print_flag (bool print)
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	127 {
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	128 m_print_flag = print;
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	129 return this;
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	130 }
2971 f2be17e6f1ea [project @ 1997-05-15 18:55:44 by jwe] jwe parents: 2960 diff changeset	131
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	132 virtual void copy_base (const tree_expression& e)
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	133 {
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	134 m_num_parens = e.m_num_parens;
667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	135 m_postfix_index_type = e.m_postfix_index_type;
667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	136 m_print_flag = e.m_print_flag;
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	137 }
5861 2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe] jwe parents: 5307 diff changeset	138
27371 fcaecdbc8d8a don't use visitor pattern for expression evaluation (bug #56752) John W. Eaton <jwe@octave.org> parents: 26377 diff changeset	139 virtual octave_value evaluate (tree_evaluator& tw, int nargout = 1) = 0;
fcaecdbc8d8a don't use visitor pattern for expression evaluation (bug #56752) John W. Eaton <jwe@octave.org> parents: 26377 diff changeset	140
fcaecdbc8d8a don't use visitor pattern for expression evaluation (bug #56752) John W. Eaton <jwe@octave.org> parents: 26377 diff changeset	141 virtual octave_value_list
fcaecdbc8d8a don't use visitor pattern for expression evaluation (bug #56752) John W. Eaton <jwe@octave.org> parents: 26377 diff changeset	142 evaluate_n (tree_evaluator& tw, int nargout = 1) = 0;
fcaecdbc8d8a don't use visitor pattern for expression evaluation (bug #56752) John W. Eaton <jwe@octave.org> parents: 26377 diff changeset	143
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	144 protected:
2971 f2be17e6f1ea [project @ 1997-05-15 18:55:44 by jwe] jwe parents: 2960 diff changeset	145
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	146 // A count of the number of times this expression appears directly
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	147 // inside a set of parentheses.
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	148 //
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	149 // (((e1)) + e2) ==> 2 for expression e1
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	150 // ==> 1 for expression ((e1)) + e2
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	151 // ==> 0 for expression e2
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	152 int m_num_parens;
2971 f2be17e6f1ea [project @ 1997-05-15 18:55:44 by jwe] jwe parents: 2960 diff changeset	153
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	154 // The first index type associated with this expression. This field
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	155 // is 0 (character '\0') if the expression has no associated index.
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	156 // See the code in tree_identifier::rvalue for the rationale.
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	157 char m_postfix_index_type;
2971 f2be17e6f1ea [project @ 1997-05-15 18:55:44 by jwe] jwe parents: 2960 diff changeset	158
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	159 // TRUE if this expression is the EXPR in for loop:
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	160 // FOR i = EXPR ... END
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	161 bool m_for_cmd_expr;
19394 b39cbe9f3bb0 allow ranges to be disabled John W. Eaton <jwe@octave.org> parents: 18132 diff changeset	162
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	163 // Print result of rvalue for this expression?
30181 667b868861ba maint: use "m_" prefix for protected member variables in class tree_expression. Rik <rik@octave.org> parents: 29358 diff changeset	164 bool m_print_flag;
23075 4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	165 };
4e3d47dc7e25 move parse tree classes inside octave namespace John W. Eaton <jwe@octave.org> parents: 22869 diff changeset	166 }
2988 daa1ed1f5462 [project @ 1997-05-16 07:23:15 by jwe] jwe parents: 2980 diff changeset	167
1739 bbfca89cb1cd [project @ 1996-01-12 11:03:26 by jwe] jwe parents: diff changeset	168 #endif

Mercurial > octave

annotate libinterp/parse-tree/pt-exp.h @ 31394:7781b1e77406