ANTLRDFA.h revision 324c4644fee44b9898524c09511bd33c3f12e2df 
1// [The "BSD licence"]
2// Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit
3// All rights reserved.
4//
5// Redistribution and use in source and binary forms, with or without
6// modification, are permitted provided that the following conditions
7// are met:
8// 1. Redistributions of source code must retain the above copyright
9//    notice, this list of conditions and the following disclaimer.
10// 2. Redistributions in binary form must reproduce the above copyright
11//    notice, this list of conditions and the following disclaimer in the
12//    documentation and/or other materials provided with the distribution.
13// 3. The name of the author may not be used to endorse or promote products
14//    derived from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27#import <Cocoa/Cocoa.h>
28#import "ANTLRBaseRecognizer.h"
29#import "ANTLRCharStream.h"
30#import "ANTLRNoViableAltException.h"
31
32@interface ANTLRDFA : NSObject {
33	// the tables are set by subclasses to their own static versions.
34	const int *eot;
35	const int *eof;
36	const unichar *min;
37	const unichar *max;
38	const int *accept;
39	const int *special;
40	const int **transition;
41
42	ANTLRBaseRecognizer *recognizer;
43	NSInteger decisionNumber;
44    NSInteger len;
45}
46
47@property (retain, getter=getRecognizer,setter=setRecognizer:) ANTLRBaseRecognizer *recognizer;
48@property (assign, getter=getDecision,setter=setDecision:) NSInteger decisionNumber;
49@property (assign, getter=getLen,setter=setLen:) NSInteger len;
50
51- (id) initWithRecognizer:(id) theRecognizer;
52// simulate the DFA using the static tables and predict an alternative
53- (NSInteger) predict:(id<ANTLRCharStream>)anInput;
54- (void) noViableAlt:(NSInteger)state Stream:(id<ANTLRIntStream>)anInput;
55
56- (NSInteger) specialStateTransition:(NSInteger)state Stream:(id<ANTLRIntStream>)anInput;
57// - (NSInteger) specialStateTransition:(NSInteger) state;
58//- (unichar) specialTransition:(unichar) state symbol:(NSInteger) symbol;
59
60// hook for debugger support
61- (void) error:(ANTLRNoViableAltException *)nvae;
62
63- (NSString *) description;
64- (BOOL) evaluateSyntacticPredicate:(SEL)synpredFragment;
65
66+ (void) setIsEmittingDebugInfo:(BOOL) shouldEmitDebugInfo;
67
68- (NSInteger)getDecision;
69- (void)setDecision:(NSInteger)aDecison;
70
71- (ANTLRBaseRecognizer *)getRecognizer;
72- (void)setRecognizer:(ANTLRBaseRecognizer *)aRecognizer;
73- (NSInteger)length;
74
75@end
76