xref: /external/antlr/antlr-3.4/runtime/ObjC/ANTLR.framework/Headers/ANTLRCharStream.h

// [The "BSD licence"]
// Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit
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//
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// modification, are permitted provided that the following conditions
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#import "ANTLRIntStream.h"

#define	ANTLRCharStreamEOF -1


@protocol ANTLRCharStream < ANTLRIntStream >

- (NSString *) substringWithRange:(NSRange) theRange;

/** Get the ith character of lookahead.  This is the same usually as
 *  LA(i).  This will be used for labels in the generated
 *  lexer code.  I'd prefer to return a char here type-wise, but it's
 *  probably better to be 32-bit clean and be consistent with LA.
 */
- (NSInteger)LT:(NSInteger) i;

// ANTLR tracks the line information automatically
- (NSInteger) getLine;

// Because this stream can rewind, we need to be able to reset the line
- (void) setLine:(NSInteger) theLine;

// The index of the character relative to the beginning of the line 0..n-1
- (NSInteger) getCharPositionInLine;

- (void) setCharPositionInLine:(NSInteger) thePos;


@end