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Java Source Code / Java Documentation » IDE Netbeans » cnd » antlr

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

antlr .TokenBuffer

TokenBuffer

public class TokenBuffer (Code)

A Stream of Token objects fed to the parser from a Tokenizer 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 Also: antlr.Token
See Also: antlr.TokenQueue

Field Summary
final public static int	INITIAL_BUFFER_SIZE

Constructor Summary
public	TokenBuffer(TokenStream input)

Method Summary
final public int	LA(int i)
final public Token	LT(int i)
final public void	consume()
final public int	index() What token index are we at? Assume mark() done at start.
final public int	mark() Return an integer marker that can be used to rewind the buffer to its current state.
final public void	rewind(int marker) Rewind the token buffer to a marker.
final public void	seek(int position)

Field Detail

INITIAL_BUFFER_SIZE
final public static int INITIAL_BUFFER_SIZE(Code)

Constructor Detail

TokenBuffer
public TokenBuffer(TokenStream input)(Code)
	Create a token buffer

Method Detail

LA
final public int LA(int i)(Code)
	Get a lookahead token value

LT
final public Token LT(int i)(Code)
	Get a lookahead token

consume
final public void consume()(Code)
	Mark another token for deferred consumption

index
final public int index()(Code)
	What token index are we at? Assume mark() done at start.

mark
final public int mark()(Code)
	Return an integer marker that can be used to rewind the buffer to its current state.

rewind
final public void rewind(int marker)(Code)
	Rewind the token buffer to a marker. Parameters: marker - Marker returned previously from mark()

seek
final public void seek(int position)(Code)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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