#ifndef INC_TokenBuffer_hpp__ #define INC_TokenBuffer_hpp__ /** * SOFTWARE RIGHTS *
* ANTLR 2.6.0 MageLang Insitute, 1999 *
* We reserve no legal rights to the ANTLR--it is fully in the * public domain. An individual or company may do whatever * they wish with source code distributed with ANTLR or the * code generated by ANTLR, including the incorporation of * ANTLR, or its output, into commerical software. *
* We encourage users to develop software with ANTLR. However, * we do ask that credit is given to us for developing * ANTLR. By "credit", we mean that if you use ANTLR or * incorporate any source code into one of your programs * (commercial product, research project, or otherwise) that * you acknowledge this fact somewhere in the documentation, * research report, etc... If you like ANTLR and have * developed a nice tool with the output, please mention that * you developed it using ANTLR. In addition, we ask that the * headers remain intact in our source code. As long as these * guidelines are kept, we expect to continue enhancing this * system and expect to make other tools available as they are * completed. *
* The ANTLR gang:
* @version ANTLR 2.6.0 MageLang Insitute, 1999
* @author Terence Parr, MageLang Institute
* @author
John Lilley, Empathy Software
* @author
Pete Wells
*/
#include "antlr/config.h"
#include "antlr/TokenStream.h"
#include "antlr/CircularQueue.h"
ANTLR_BEGIN_NAMESPACE(antlr)
/**A Stream of Token objects fed to the parser from a TokenStream that can
* be rewound via mark()/rewind() methods.
*
* A dynamic array is used to buffer up all the input tokens. Normally, * "k" tokens are stored in the buffer. More tokens may be stored during * guess mode (testing syntactic predicate), or when LT(i>k) is referenced. * Consumption of tokens is deferred. In other words, reading the next * token is not done by conume(), but deferred until needed by LA or LT. *
*
* @see antlr.Token
* @see antlr.TokenStream
* @see antlr.TokenQueue
*/
class TokenBuffer {
protected:
// Token source
TokenStream& input;
private:
// Number of active markers
int nMarkers;
// Additional offset used when markers are active
int markerOffset;
// Number of calls to consume() since last LA() or LT() call
int numToConsume;
// Circular queue
CircularQueue