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91 lines
3.4 KiB
91 lines
3.4 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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#import "TokenSource.h"
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#import "BaseRecognizer.h"
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#import "RecognizerSharedState.h"
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#import "CharStream.h"
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#import "Token.h"
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#import "CommonToken.h"
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#import "RecognitionException.h"
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#import "MismatchedTokenException.h"
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#import "MismatchedRangeException.h"
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@interface Lexer : BaseRecognizer <TokenSource> {
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id<CharStream> input; ///< The character stream we pull tokens out of.
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NSUInteger ruleNestingLevel;
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}
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@property (retain, getter=input, setter=setInput:) id<CharStream> input;
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@property (getter=getRuleNestingLevel, setter=setRuleNestingLevel:) NSUInteger ruleNestingLevel;
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#pragma mark Initializer
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- (id) initWithCharStream:(id<CharStream>) anInput;
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- (id) initWithCharStream:(id<CharStream>)anInput State:(RecognizerSharedState *)state;
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- (id) copyWithZone:(NSZone *)zone;
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- (void) reset;
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// - (RecognizerSharedState *) state;
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#pragma mark Tokens
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- (id<Token>)getToken;
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- (void) setToken: (id<Token>) aToken;
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- (id<Token>) nextToken;
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- (void) mTokens; // abstract, defined in generated sources
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- (void) skip;
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- (id<CharStream>) input;
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- (void) setInput:(id<CharStream>)aCharStream;
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- (void) emit;
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- (void) emit:(id<Token>)aToken;
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#pragma mark Matching
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- (void) matchString:(NSString *)aString;
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- (void) matchAny;
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- (void) matchChar:(unichar) aChar;
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- (void) matchRangeFromChar:(unichar)fromChar to:(unichar)toChar;
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#pragma mark Informational
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- (NSUInteger) line;
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- (NSUInteger) charPositionInLine;
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- (NSInteger) index;
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- (NSString *) text;
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- (void) setText:(NSString *) theText;
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// error handling
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- (void) reportError:(RecognitionException *)e;
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- (NSString *)getErrorMessage:(RecognitionException *)e TokenNames:(AMutableArray *)tokenNames;
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- (NSString *)getCharErrorDisplay:(NSInteger)c;
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- (void) recover:(RecognitionException *)e;
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- (void)traceIn:(NSString *)ruleName Index:(NSInteger)ruleIndex;
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- (void)traceOut:(NSString *)ruleName Index:(NSInteger)ruleIndex;
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@end
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