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90 lines
3.1 KiB
90 lines
3.1 KiB
// [The "BSD licence"]
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// Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. The name of the author may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#import <Foundation/Foundation.h>
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#ifndef DEBUG_DEALLOC
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#define DEBUG_DEALLOC
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#endif
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typedef enum {
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TokenTypeEOF = -1,
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TokenTypeInvalid,
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TokenTypeEOR,
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TokenTypeDOWN,
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TokenTypeUP,
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TokenTypeMIN
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} TokenType;
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typedef enum {
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TokenChannelDefault = 0,
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TokenChannelHidden = 99
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} TokenChannel;
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#define HIDDEN 99
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@protocol Token < NSObject, NSCopying >
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@property (retain, getter = text, setter = setText:) NSString *text;
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@property (assign) NSInteger type;
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@property (assign) NSUInteger line;
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@property (assign) NSUInteger charPositionInLine;
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// The singleton eofToken instance.
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+ (id<Token>) eofToken;
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// The default channel for this class of Tokens
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+ (TokenChannel) defaultChannel;
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// provide hooks to explicitely set the text as opposed to use the indices into the CharStream
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- (NSString *) text;
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- (void) setText:(NSString *)theText;
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- (NSInteger)type;
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- (void) setType: (NSInteger) aType;
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// ANTLR v3 provides automatic line and position tracking. Subclasses do not need to
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// override these, if they do not want to store line/pos tracking information
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- (NSUInteger)line;
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- (void) setLine: (NSUInteger) aLine;
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- (NSUInteger)charPositionInLine;
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- (void) setCharPositionInLine:(NSUInteger)aCharPositionInLine;
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// explicitely change the channel this Token is on. The default parser implementation
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// just sees the defaultChannel
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// Common idiom is to put whitespace tokens on channel 99.
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- (NSUInteger)channel;
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- (void) setChannel: (NSUInteger) aChannel;
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// the index of this Token into the TokenStream
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- (NSInteger) getTokenIndex;
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- (void) setTokenIndex: (NSInteger) aTokenIndex;
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- (NSString *)toString;
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@end
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