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/********************* */
/*! \file bounded_token_buffer.h
** \verbatim
** Original author: cconway
** Major contributors: mdeters
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009-2012 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief An ANTLR3 bounded token stream.
**
** An ANTLR3 bounded token stream. The stream has a bounded
** lookahead/behind k. Calling LT(i) with i > k or i < -k will raise
** an exception. Only use this factory if you *know* that the grammar
** has bounded lookahead (e.g., if you've set the k parameter in the
** parser.
**
** NOTE: ANTLR3 puts "hidden" tokens into this buffer too, so
** pathological inputs can exceed the k token lookahead, even if
** your grammar really is LL(k). Be sure that irrelevant tokens
** are SKIP()'d and not "hidden".
**/
#include "cvc4parser_private.h"
#ifndef __CVC4__PARSER__BOUNDED_TOKEN_BUFFER_H
#define __CVC4__PARSER__BOUNDED_TOKEN_BUFFER_H
#include <antlr3defs.h>
namespace CVC4 {
namespace parser {
#ifdef __cplusplus
extern "C" {
#endif
/** A "super" structure for COMMON_TOKEN_STREAM. */
typedef struct BOUNDED_TOKEN_BUFFER_struct
{
pANTLR3_COMMON_TOKEN_STREAM commonTstream;
pANTLR3_COMMON_TOKEN* tokenBuffer;
// tokenNeg1, token1, token2;
ANTLR3_UINT32 currentIndex, maxIndex, k, bufferSize;
ANTLR3_BOOLEAN empty, done;
} BOUNDED_TOKEN_BUFFER, *pBOUNDED_TOKEN_BUFFER;
pBOUNDED_TOKEN_BUFFER
BoundedTokenBufferSourceNew(ANTLR3_UINT32 k, pANTLR3_TOKEN_SOURCE source);
void
BoundedTokenBufferFree(pBOUNDED_TOKEN_BUFFER buffer);
#ifdef __cplusplus
}/* extern "C" */
#endif
}/* CVC4::parser namespace */
}/* CVC4 namespace */
#endif /* __CVC4__PARSER__BOUNDED_TOKEN_BUFFER_H */
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