octave: libinterp/parse-tree/lex.h annotate

annotate libinterp/parse-tree/lex.h @ 16259:0b5ab09dfce4

2/10 commits reworking the lexer

author	John W. Eaton <jwe@octave.org>
date	Mon, 11 Mar 2013 14:18:39 -0400
parents	db7f07b22b9b
children	6c211b8cfbd9 9acb86e6ac90

rev	line source
1 78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	1 /*
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	2
14138 72c96de7a403 maint: update copyright notices for 2012 John W. Eaton <jwe@octave.org> parents: 13973 diff changeset	3 Copyright (C) 1993-2012 John W. Eaton
1 78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	4
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	5 This file is part of Octave.
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	6
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	7 Octave is free software; you can redistribute it and/or modify it
78fd87e624cb [project @ 1993-08-08 01:13:40 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: 5775 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: 5775 diff changeset	10 option) any later version.
1 78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	11
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	12 Octave is distributed in the hope that it will be useful, but WITHOUT
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	15 for more details.
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	16
78fd87e624cb [project @ 1993-08-08 01:13:40 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: 5775 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: 5775 diff changeset	19 <http://www.gnu.org/licenses/>.
1 78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	20
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	21 */
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	22
383 0b52c68ec81f [project @ 1994-03-09 21:19:44 by jwe] jwe parents: 247 diff changeset	23 #if !defined (octave_lex_h)
0b52c68ec81f [project @ 1994-03-09 21:19:44 by jwe] jwe parents: 247 diff changeset	24 #define octave_lex_h 1
1 78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	25
16230 4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	26 #include <deque>
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	27 #include <limits>
8745 6dc61981d18b better handling of object indexing in lexer John W. Eaton <jwe@octave.org> parents: 8701 diff changeset	28 #include <list>
16101 8d19626b38ae provide copy contructor and operator = for lexical_feedback class. John W. Eaton <jwe@octave.org> parents: 16100 diff changeset	29 #include <set>
11464 21b5284fa78d avoid error when parsing nested functions John W. Eaton <jwe@octave.org> parents: 11367 diff changeset	30 #include <stack>
8745 6dc61981d18b better handling of object indexing in lexer John W. Eaton <jwe@octave.org> parents: 8701 diff changeset	31
16228 e19b1632d7c1 revamp most comment handling John W. Eaton <jwe@octave.org> parents: 16224 diff changeset	32 #include "comment-list.h"
16195 b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	33 #include "input.h"
16230 4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	34 #include "token.h"
16195 b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	35
13973 2c664266e9d0 clean up parser memory on exit John W. Eaton <jwe@octave.org> parents: 13237 diff changeset	36 extern OCTINTERP_API void cleanup_parser (void);
2c664266e9d0 clean up parser memory on exit John W. Eaton <jwe@octave.org> parents: 13237 diff changeset	37
4867 c7f9ea142fda [project @ 2004-04-20 19:41:11 by jwe] jwe parents: 4753 diff changeset	38 // Is the given string a keyword?
c7f9ea142fda [project @ 2004-04-20 19:41:11 by jwe] jwe parents: 4753 diff changeset	39 extern bool is_keyword (const std::string& s);
c7f9ea142fda [project @ 2004-04-20 19:41:11 by jwe] jwe parents: 4753 diff changeset	40
16113 7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	41 class
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	42 stream_reader
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	43 {
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	44 public:
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	45 virtual int getc (void) = 0;
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	46 virtual int ungetc (int c) = 0;
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	47
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	48 protected:
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	49 stream_reader (void) { }
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	50 ~stream_reader (void) { }
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	51
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	52 private:
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	53
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	54 // No copying!
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	55 stream_reader (const stream_reader&);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	56 stream_reader& operator = (const stream_reader&);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	57 };
16111 3ec4f6488569 move token stack to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16110 diff changeset	58
1826 b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	59 // For communication between the lexer and parser.
b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	60
3585 d9803711e047 [project @ 2000-02-08 04:35:39 by jwe] jwe parents: 3351 diff changeset	61 class
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	62 lexical_feedback
1826 b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	63 {
b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	64 public:
b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	65
16104 c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	66 // Track nesting of square brackets, curly braces, and parentheses.
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	67
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	68 class bbp_nesting_level
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	69 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	70 private:
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	71
16107 3b791008b88e give name to anonymous enum John W. Eaton <jwe@octave.org> parents: 16106 diff changeset	72 enum bracket_type
16104 c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	73 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	74 BRACKET = 1,
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	75 BRACE = 2,
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	76 PAREN = 3
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	77 };
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	78
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	79 public:
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	80
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	81 bbp_nesting_level (void) : context () { }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	82
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	83 bbp_nesting_level (const bbp_nesting_level& nl) : context (nl.context) { }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	84
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	85 bbp_nesting_level& operator = (const bbp_nesting_level& nl)
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	86 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	87 if (&nl != this)
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	88 context = nl.context;
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	89
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	90 return *this;
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	91 }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	92
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	93 ~bbp_nesting_level (void) { }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	94
16194 b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	95 void reset (void)
b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	96 {
b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	97 while (! context.empty ())
b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	98 context.pop ();
b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	99 }
b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	100
16104 c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	101 void bracket (void) { context.push (BRACKET); }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	102
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	103 bool is_bracket (void)
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	104 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	105 return ! context.empty () && context.top () == BRACKET;
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	106 }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	107
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	108 void brace (void) { context.push (BRACE); }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	109
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	110 bool is_brace (void)
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	111 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	112 return ! context.empty () && context.top () == BRACE;
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	113 }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	114
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	115 void paren (void) { context.push (PAREN); }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	116
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	117 bool is_paren (void)
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	118 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	119 return ! context.empty () && context.top () == PAREN;
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	120 }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	121
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	122 bool is_bracket_or_brace (void)
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	123 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	124 return (! context.empty ()
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	125 && (context.top () == BRACKET \|\| context.top () == BRACE));
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	126 }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	127
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	128 bool none (void) { return context.empty (); }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	129
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	130 void remove (void)
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	131 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	132 if (! context.empty ())
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	133 context.pop ();
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	134 }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	135
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	136 void clear (void)
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	137 {
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	138 while (! context.empty ())
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	139 context.pop ();
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	140 }
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	141
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	142 private:
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	143
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	144 std::stack<int> context;
c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	145 };
16230 4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	146
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	147 class token_cache
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	148 {
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	149 public:
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	150
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	151 // Store an "unlimited" number of tokens.
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	152 token_cache (size_t sz_arg = std::numeric_limits<size_t>::max ())
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	153 : buffer (), sz (sz_arg)
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	154 { }
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	155
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	156 void push (token *tok)
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	157 {
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	158 if (buffer.size () == sz)
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	159 pop ();
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	160
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	161 buffer.push_front (tok);
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	162 }
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	163
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	164 void pop (void)
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	165 {
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	166 if (! empty ())
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	167 {
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	168 delete buffer.back ();
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	169 buffer.pop_back ();
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	170 }
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	171 }
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	172
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	173 // Direct access.
16255 12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	174 token *at (size_t n)
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	175 {
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	176 return empty () ? 0 : buffer.at (n);
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	177 }
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	178
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	179 const token *at (size_t n) const
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	180 {
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	181 return empty () ? 0 : buffer.at (n);
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	182 }
16230 4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	183
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	184 // Most recently pushed.
16255 12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	185 token *front (void)
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	186 {
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	187 return empty () ? 0 : buffer.front ();
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	188 }
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	189
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	190 const token *front (void) const
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	191 {
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	192 return empty () ? 0 : buffer.front ();
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	193 }
16230 4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	194
16255 12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	195 token *back (void)
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	196 {
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	197 return empty () ? 0 : buffer.back ();
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	198 }
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	199
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	200 const token *back (void) const
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	201 {
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	202 return empty () ? 0 : buffer.back ();
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	203 }
16230 4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	204
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	205 // Number of elements currently in the buffer, max of sz.
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	206 size_t size (void) const { return buffer.size (); }
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	207
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	208 bool empty (void) const { return buffer.empty (); }
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	209
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	210 void clear (void)
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	211 {
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	212 while (! empty ())
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	213 pop ();
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	214 }
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	215
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	216 private:
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	217
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	218 std::deque<token *> buffer;
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	219
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	220 size_t sz;
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	221
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	222 // No copying!
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	223
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	224 token_cache (const token_cache&);
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	225
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	226 token_cache& operator = (const token_cache&);
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	227 };
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	228
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	229 lexical_feedback (void)
16259 0b5ab09dfce4 2/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16257 diff changeset	230 : end_of_input (false), at_beginning_of_statement (true),
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	231 looking_at_anon_fcn_args (false), looking_at_return_list (false),
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	232 looking_at_parameter_list (false), looking_at_decl_list (false),
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	233 looking_at_initializer_expression (false),
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	234 looking_at_matrix_or_assign_lhs (false),
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	235 looking_for_object_index (false),
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	236 looking_at_indirect_ref (false), parsing_class_method (false),
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	237 maybe_classdef_get_set_method (false), parsing_classdef (false),
16203 127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	238 quote_is_transpose (false), force_script (false),
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	239 reading_fcn_file (false), reading_script_file (false),
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	240 reading_classdef_file (false),
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	241 input_line_number (1), current_input_column (1),
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	242 bracketflag (0), braceflag (0),
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	243 looping (0), defining_func (0), looking_at_function_handle (0),
16203 127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	244 block_comment_nesting_level (0), token_count (0),
16228 e19b1632d7c1 revamp most comment handling John W. Eaton <jwe@octave.org> parents: 16224 diff changeset	245 current_input_line (), comment_text (), help_text (),
e19b1632d7c1 revamp most comment handling John W. Eaton <jwe@octave.org> parents: 16224 diff changeset	246 fcn_file_name (), fcn_file_full_name (), looking_at_object_index (),
16207 0467d68ca891 move current_input_line to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16203 diff changeset	247 parsed_function_name (), pending_local_variables (),
16230 4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	248 nesting_level (), tokens ()
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	249 {
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	250 init ();
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	251 }
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	252
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	253 ~lexical_feedback (void);
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	254
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	255 void init (void);
16194 b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	256
b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	257 void reset (void);
b7ca669af528 reset lexical_feedback state before starting a new parse John W. Eaton <jwe@octave.org> parents: 16193 diff changeset	258
16255 12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	259 int previous_token_value (void) const;
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	260
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	261 bool previous_token_value_is (int tok_val) const;
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	262
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	263 void mark_previous_token_trailing_space (void);
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	264
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	265 bool space_follows_previous_token (void) const;
12bf6a3f8c45 store more info in token value class John W. Eaton <jwe@octave.org> parents: 16253 diff changeset	266
16257 db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	267 bool previous_token_is_binop (void) const;
db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	268
db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	269 bool previous_token_may_be_command (void) const;
db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	270
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	271 // true means that we have encountered eof on the input stream.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	272 bool end_of_input;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	273
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	274 // true means we are at the beginning of a statement, where a
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	275 // command name is possible.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	276 bool at_beginning_of_statement;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	277
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	278 // true means we are parsing an anonymous function argument list.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	279 bool looking_at_anon_fcn_args;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	280
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	281 // true means we're parsing the return list for a function.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	282 bool looking_at_return_list;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	283
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	284 // true means we're parsing the parameter list for a function.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	285 bool looking_at_parameter_list;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	286
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	287 // true means we're parsing a declaration list (global or
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	288 // persistent).
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	289 bool looking_at_decl_list;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	290
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	291 // true means we are looking at the initializer expression for a
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	292 // parameter list element.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	293 bool looking_at_initializer_expression;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	294
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	295 // true means we're parsing a matrix or the left hand side of
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	296 // multi-value assignment statement.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	297 bool looking_at_matrix_or_assign_lhs;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	298
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	299 // object index not possible until we've seen something.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	300 bool looking_for_object_index;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	301
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	302 // true means we're looking at an indirect reference to a
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	303 // structure element.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	304 bool looking_at_indirect_ref;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	305
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	306 // true means we are parsing a class method in function or classdef file.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	307 bool parsing_class_method;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	308
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	309 // true means we are parsing a class method declaration line in a
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	310 // classdef file and can accept a property get or set method name.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	311 // for example, "get.propertyname" is recognized as a function name.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	312 bool maybe_classdef_get_set_method;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	313
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	314 // true means we are parsing a classdef file
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	315 bool parsing_classdef;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	316
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	317 // return transpose or start a string?
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	318 bool quote_is_transpose;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	319
16203 127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	320 // TRUE means treat the current file as a script even if the first
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	321 // token is "function" or "classdef".
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	322 bool force_script;
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	323
16199 810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	324 // TRUE means we're parsing a function file.
810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	325 bool reading_fcn_file;
810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	326
810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	327 // TRUE means we're parsing a script file.
810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	328 bool reading_script_file;
810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	329
810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	330 // TRUE means we're parsing a classdef file.
810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	331 bool reading_classdef_file;
810a71122c25 move more global variables to octave_lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16195 diff changeset	332
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	333 // the current input line number.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	334 int input_line_number;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	335
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	336 // the column of the current token.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	337 int current_input_column;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	338
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	339 // square bracket level count.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	340 int bracketflag;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	341
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	342 // curly brace level count.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	343 int braceflag;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	344
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	345 // true means we're in the middle of defining a loop.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	346 int looping;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	347
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	348 // nonzero means we're in the middle of defining a function.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	349 int defining_func;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	350
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	351 // nonzero means we are parsing a function handle.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	352 int looking_at_function_handle;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	353
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	354 // nestng level for blcok comments.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	355 int block_comment_nesting_level;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	356
16203 127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	357 // Count of tokens recognized by this lexer since initialized or
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	358 // since the last reset.
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	359 size_t token_count;
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	360
16207 0467d68ca891 move current_input_line to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16203 diff changeset	361 // The current line of input.
0467d68ca891 move current_input_line to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16203 diff changeset	362 std::string current_input_line;
0467d68ca891 move current_input_line to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16203 diff changeset	363
16228 e19b1632d7c1 revamp most comment handling John W. Eaton <jwe@octave.org> parents: 16224 diff changeset	364 // The current comment text.
e19b1632d7c1 revamp most comment handling John W. Eaton <jwe@octave.org> parents: 16224 diff changeset	365 std::string comment_text;
e19b1632d7c1 revamp most comment handling John W. Eaton <jwe@octave.org> parents: 16224 diff changeset	366
16203 127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	367 // The current help text.
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	368 std::string help_text;
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	369
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	370 // Simple name of function file we are reading.
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	371 std::string fcn_file_name;
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	372
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	373 // Full name of file we are reading.
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	374 std::string fcn_file_full_name;
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	375
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	376 // if the front of the list is true, the closest paren, brace, or
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	377 // bracket nesting is an index for an object.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	378 std::list<bool> looking_at_object_index;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	379
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	380 // if the top of the stack is true, then we've already seen the name
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	381 // of the current function. should only matter if
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	382 // current_function_level > 0
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	383 std::stack<bool> parsed_function_name;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	384
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	385 // set of identifiers that might be local variable names.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	386 std::set<std::string> pending_local_variables;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	387
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	388 // is the closest nesting level a square bracket, squiggly brace or
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	389 // a paren?
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	390 bbp_nesting_level nesting_level;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	391
16230 4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	392 // Tokens generated by the lexer.
4bf907906134 use a queue to hold tokens in the lexer John W. Eaton <jwe@octave.org> parents: 16229 diff changeset	393 token_cache tokens;
16193 d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	394
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	395 private:
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	396
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	397 // No copying!
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	398
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	399 lexical_feedback (const lexical_feedback&);
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	400
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	401 lexical_feedback& operator = (const lexical_feedback&);
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	402 };
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	403
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	404 // octave_lexer inherits from lexical_feedback because we will
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	405 // eventually have several different constructors and it is easier to
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	406 // intialize if everything is grouped in a parent class rather than
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	407 // listing all the members in the octave_lexer class.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	408
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	409 class
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	410 octave_lexer : public lexical_feedback
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	411 {
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor John W. Eaton <jwe@octave.org> parents: 16185 diff changeset	412 public:
16104 c8974e28da59 move nesting_level to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16103 diff changeset	413
16183 359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	414 // Handle buffering of input for lexer.
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	415
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	416 class input_buffer
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	417 {
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	418 public:
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	419
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	420 input_buffer (void)
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	421 : buffer (), pos (0), chars_left (0), eof (false)
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	422 { }
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	423
16195 b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	424 void fill (const std::string& input, bool eof_arg);
16183 359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	425
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	426 // Copy at most max_size characters to buf.
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	427 int copy_chunk (char *buf, size_t max_size);
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	428
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	429 bool empty (void) const { return chars_left == 0; }
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	430
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	431 bool at_eof (void) const { return eof; }
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	432
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	433 private:
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	434
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	435 std::string buffer;
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	436 const char *pos;
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	437 size_t chars_left;
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	438 bool eof;
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	439 };
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	440
16158 7eb614760ddb rename lexical_feedback to octave_lexer John W. Eaton <jwe@octave.org> parents: 16149 diff changeset	441 octave_lexer (void)
16195 b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	442 : lexical_feedback (), scanner (0), input_buf (), input_reader ()
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	443 {
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	444 init ();
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	445 }
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	446
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	447 octave_lexer (FILE *file)
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	448 : lexical_feedback (), scanner (0), input_buf (),
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	449 input_reader (file)
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	450 {
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	451 init ();
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	452 }
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	453
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	454 octave_lexer (const std::string& eval_string)
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	455 : lexical_feedback (), scanner (0), input_buf (),
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	456 input_reader (eval_string)
16101 8d19626b38ae provide copy contructor and operator = for lexical_feedback class. John W. Eaton <jwe@octave.org> parents: 16100 diff changeset	457 {
8d19626b38ae provide copy contructor and operator = for lexical_feedback class. John W. Eaton <jwe@octave.org> parents: 16100 diff changeset	458 init ();
8d19626b38ae provide copy contructor and operator = for lexical_feedback class. John W. Eaton <jwe@octave.org> parents: 16100 diff changeset	459 }
8d19626b38ae provide copy contructor and operator = for lexical_feedback class. John W. Eaton <jwe@octave.org> parents: 16100 diff changeset	460
16158 7eb614760ddb rename lexical_feedback to octave_lexer John W. Eaton <jwe@octave.org> parents: 16149 diff changeset	461 ~octave_lexer (void);
1826 b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	462
16149 49dfba4fd3c5 use pure parser and reentrant lexer interfaces John W. Eaton <jwe@octave.org> parents: 16139 diff changeset	463 void init (void);
1826 b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	464
16139 2fd39ab12209 move a function and data member from lexical_feedback to octave_parser John W. Eaton <jwe@octave.org> parents: 16130 diff changeset	465 void reset (void);
16122 6884401b2fbb move reset_parser lexer helper function to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16120 diff changeset	466
16203 127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	467 void prep_for_file (void);
16124 3be725cd195b move more lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16122 diff changeset	468
16195 b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	469 int read (char *buf, unsigned int max_size);
16120 4b68eb9b98b0 move octave_read lexer helper function to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16118 diff changeset	470
16164 c5bfdc4c0963 move end_of_input flag from octve_parser class to octave_lexer class John W. Eaton <jwe@octave.org> parents: 16158 diff changeset	471 int handle_end_of_input (void);
c5bfdc4c0963 move end_of_input flag from octve_parser class to octave_lexer class John W. Eaton <jwe@octave.org> parents: 16158 diff changeset	472
16128 210039e91ad6 localize use of yytext with lexical_feedback member function John W. Eaton <jwe@octave.org> parents: 16126 diff changeset	473 char *flex_yytext (void);
210039e91ad6 localize use of yytext with lexical_feedback member function John W. Eaton <jwe@octave.org> parents: 16126 diff changeset	474
16130 421dea028bbf localize use of yyleng with lexical_feedback member function John W. Eaton <jwe@octave.org> parents: 16129 diff changeset	475 int flex_yyleng (void);
421dea028bbf localize use of yyleng with lexical_feedback member function John W. Eaton <jwe@octave.org> parents: 16129 diff changeset	476
16113 7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	477 int text_yyinput (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	478
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	479 void xunput (char c, char *buf);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	480
16125 96a58f197f93 allow xunput to be called without buffer argument John W. Eaton <jwe@octave.org> parents: 16124 diff changeset	481 void xunput (char c);
96a58f197f93 allow xunput to be called without buffer argument John W. Eaton <jwe@octave.org> parents: 16124 diff changeset	482
16113 7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	483 bool inside_any_object_index (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	484
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	485 int is_keyword_token (const std::string& s);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	486
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	487 bool is_variable (const std::string& name);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	488
16257 db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	489 bool whitespace_is_significant (void);
db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	490
16113 7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	491 void handle_number (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	492
16253 a89cf57ba3a5 partial cleanup of continuation handling in lexer John W. Eaton <jwe@octave.org> parents: 16231 diff changeset	493 void handle_continuation (void);
a89cf57ba3a5 partial cleanup of continuation handling in lexer John W. Eaton <jwe@octave.org> parents: 16231 diff changeset	494
a89cf57ba3a5 partial cleanup of continuation handling in lexer John W. Eaton <jwe@octave.org> parents: 16231 diff changeset	495 void finish_comment (octave_comment_elt::comment_type typ,
a89cf57ba3a5 partial cleanup of continuation handling in lexer John W. Eaton <jwe@octave.org> parents: 16231 diff changeset	496 bool looking_at_continuation = false);
a89cf57ba3a5 partial cleanup of continuation handling in lexer John W. Eaton <jwe@octave.org> parents: 16231 diff changeset	497
16113 7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	498 bool have_continuation (bool trailing_comments_ok = true);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	499
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	500 bool have_ellipsis_continuation (bool trailing_comments_ok = true);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	501
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	502 int handle_string (char delim);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	503
16259 0b5ab09dfce4 2/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16257 diff changeset	504 int handle_close_bracket (int bracket_type);
16113 7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	505
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	506 bool next_token_can_follow_bin_op (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	507
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	508 bool looks_like_command_arg (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	509
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	510 int handle_superclass_identifier (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	511
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	512 int handle_meta_identifier (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	513
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	514 int handle_identifier (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	515
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	516 void maybe_warn_separator_insert (char sep);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	517
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	518 void gripe_single_quote_string (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	519
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	520 void gripe_matlab_incompatible (const std::string& msg);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	521
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	522 void maybe_gripe_matlab_incompatible_comment (char c);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	523
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	524 void gripe_matlab_incompatible_continuation (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	525
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	526 void gripe_matlab_incompatible_operator (const std::string& op);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16111 diff changeset	527
16126 5c885c13bfa3 localize use of yylval.tok_val in lexical_feedback member functions John W. Eaton <jwe@octave.org> parents: 16125 diff changeset	528 void push_token (token *);
5c885c13bfa3 localize use of yylval.tok_val in lexical_feedback member functions John W. Eaton <jwe@octave.org> parents: 16125 diff changeset	529
5c885c13bfa3 localize use of yylval.tok_val in lexical_feedback member functions John W. Eaton <jwe@octave.org> parents: 16125 diff changeset	530 token *current_token (void);
5c885c13bfa3 localize use of yylval.tok_val in lexical_feedback member functions John W. Eaton <jwe@octave.org> parents: 16125 diff changeset	531
16118 f8e463523229 move more static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16115 diff changeset	532 void display_token (int tok);
f8e463523229 move more static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16115 diff changeset	533
16129 053b0364b507 localize use of yy_fatal_error with lexical_feedback member function John W. Eaton <jwe@octave.org> parents: 16128 diff changeset	534 void fatal_error (const char *msg);
053b0364b507 localize use of yy_fatal_error with lexical_feedback member function John W. Eaton <jwe@octave.org> parents: 16128 diff changeset	535
16229 7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	536 void lexer_debug (const char *pattern);
16118 f8e463523229 move more static lexer helper functions to lexical_feedback class John W. Eaton <jwe@octave.org> parents: 16115 diff changeset	537
16149 49dfba4fd3c5 use pure parser and reentrant lexer interfaces John W. Eaton <jwe@octave.org> parents: 16139 diff changeset	538 // Internal state of the flex-generated lexer.
49dfba4fd3c5 use pure parser and reentrant lexer interfaces John W. Eaton <jwe@octave.org> parents: 16139 diff changeset	539 void *scanner;
49dfba4fd3c5 use pure parser and reentrant lexer interfaces John W. Eaton <jwe@octave.org> parents: 16139 diff changeset	540
16183 359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	541 // Object that reads and buffers input.
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	542 input_buffer input_buf;
359d56094efa handle lexer input buffering with class John W. Eaton <jwe@octave.org> parents: 16164 diff changeset	543
16195 b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	544 octave_input_reader input_reader;
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	545
16209 e7ff32e7cf82 move global promptflag variable to octave_reader class John W. Eaton <jwe@octave.org> parents: 16207 diff changeset	546 void increment_promptflag (void) { input_reader.increment_promptflag (); }
e7ff32e7cf82 move global promptflag variable to octave_reader class John W. Eaton <jwe@octave.org> parents: 16207 diff changeset	547
e7ff32e7cf82 move global promptflag variable to octave_reader class John W. Eaton <jwe@octave.org> parents: 16207 diff changeset	548 void decrement_promptflag (void) { input_reader.decrement_promptflag (); }
e7ff32e7cf82 move global promptflag variable to octave_reader class John W. Eaton <jwe@octave.org> parents: 16207 diff changeset	549
e7ff32e7cf82 move global promptflag variable to octave_reader class John W. Eaton <jwe@octave.org> parents: 16207 diff changeset	550 int promptflag (void) const { return input_reader.promptflag (); }
e7ff32e7cf82 move global promptflag variable to octave_reader class John W. Eaton <jwe@octave.org> parents: 16207 diff changeset	551
e7ff32e7cf82 move global promptflag variable to octave_reader class John W. Eaton <jwe@octave.org> parents: 16207 diff changeset	552 int promptflag (int n) { return input_reader.promptflag (n); }
e7ff32e7cf82 move global promptflag variable to octave_reader class John W. Eaton <jwe@octave.org> parents: 16207 diff changeset	553
16195 b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	554 std::string input_source (void) const
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	555 {
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	556 return input_reader.input_source ();
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	557 }
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	558
16203 127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	559 bool input_from_terminal (void) const
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	560 {
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	561 return input_source () == "terminal";
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	562 }
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	563
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	564 bool input_from_file (void) const
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	565 {
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	566 return input_source () == "file";
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	567 }
127cccb037bf move more global parser and lexer variables to classes John W. Eaton <jwe@octave.org> parents: 16199 diff changeset	568
16195 b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	569 bool input_from_eval_string (void) const
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	570 {
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	571 return input_source () == "eval_string";
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	572 }
b52d2f9294b6 use class for reading lexer input John W. Eaton <jwe@octave.org> parents: 16194 diff changeset	573
16224 4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	574 void push_start_state (int state);
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	575
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	576 void pop_start_state (void);
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	577
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	578 void clear_start_state (void);
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	579
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	580 int start_state (void) const { return start_state_stack.top (); }
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	581
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	582 void display_start_state (void) const;
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	583
16229 7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	584 int handle_op (const char *pattern, int tok, bool convert = false,
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	585 bool bos = false, bool qit = false);
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	586
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	587 int handle_incompatible_op (const char *pattern, int tok,
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	588 bool convert = false, bool bos = false,
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	589 bool qit = false);
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	590
16257 db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	591 int handle_assign_op (const char *pattern, int tok);
db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	592
db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	593 int handle_incompatible_assign_op (const char *pattern, int tok);
db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	594
16229 7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	595 int handle_op_internal (const char *pattern, int tok, bool convert,
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	596 bool bos, bool qit, bool compat);
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	597
16231 2b15ae55c721 put all tokens in the token cache John W. Eaton <jwe@octave.org> parents: 16230 diff changeset	598 int handle_token (const std::string& name, int tok);
16229 7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	599
16231 2b15ae55c721 put all tokens in the token cache John W. Eaton <jwe@octave.org> parents: 16230 diff changeset	600 int handle_token (int tok, token *tok_val = 0);
16229 7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	601
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	602 int count_token (int tok);
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	603
16257 db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	604 int count_token_internal (int tok);
db7f07b22b9b 1/10 commits reworking the lexer John W. Eaton <jwe@octave.org> parents: 16255 diff changeset	605
16229 7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	606 int show_token (int tok);
7b7b1e4968e8 use functions instead of token return macros in lexer John W. Eaton <jwe@octave.org> parents: 16228 diff changeset	607
16126 5c885c13bfa3 localize use of yylval.tok_val in lexical_feedback member functions John W. Eaton <jwe@octave.org> parents: 16125 diff changeset	608 // For unwind protect.
16158 7eb614760ddb rename lexical_feedback to octave_lexer John W. Eaton <jwe@octave.org> parents: 16149 diff changeset	609 static void cleanup (octave_lexer *lexer) { delete lexer; }
16126 5c885c13bfa3 localize use of yylval.tok_val in lexical_feedback member functions John W. Eaton <jwe@octave.org> parents: 16125 diff changeset	610
5c885c13bfa3 localize use of yylval.tok_val in lexical_feedback member functions John W. Eaton <jwe@octave.org> parents: 16125 diff changeset	611 private:
5c885c13bfa3 localize use of yylval.tok_val in lexical_feedback member functions John W. Eaton <jwe@octave.org> parents: 16125 diff changeset	612
16224 4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	613 std::stack<int> start_state_stack;
4a848eb52de2 use stack for tracking lexer start states John W. Eaton <jwe@octave.org> parents: 16209 diff changeset	614
16110 7302f8a4df83 use pointer for global lexical_feedback structure John W. Eaton <jwe@octave.org> parents: 16107 diff changeset	615 // No copying!
7302f8a4df83 use pointer for global lexical_feedback structure John W. Eaton <jwe@octave.org> parents: 16107 diff changeset	616
16158 7eb614760ddb rename lexical_feedback to octave_lexer John W. Eaton <jwe@octave.org> parents: 16149 diff changeset	617 octave_lexer (const octave_lexer&);
16110 7302f8a4df83 use pointer for global lexical_feedback structure John W. Eaton <jwe@octave.org> parents: 16107 diff changeset	618
16158 7eb614760ddb rename lexical_feedback to octave_lexer John W. Eaton <jwe@octave.org> parents: 16149 diff changeset	619 octave_lexer& operator = (const octave_lexer&);
1826 b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	620 };
b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe] jwe parents: 1315 diff changeset	621
1 78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe] jwe parents: diff changeset	622 #endif

Mercurial > octave

annotate libinterp/parse-tree/lex.h @ 16259:0b5ab09dfce4