org.eclipse.xtext.ui.editor.contentassist.antlr
Class ObservableXtextTokenStream

java.lang.Object
  org.antlr.runtime.CommonTokenStream
      org.eclipse.xtext.parser.antlr.XtextTokenStream
          org.eclipse.xtext.ui.editor.contentassist.antlr.ObservableXtextTokenStream

All Implemented Interfaces:

org.antlr.runtime.IntStream, org.antlr.runtime.TokenStream

public class ObservableXtextTokenStream
extends XtextTokenStream

Author:

Sebastian Zarnekow - Initial contribution and API

Nested Class Summary

static interface

ObservableXtextTokenStream.StreamListener

Nested classes/interfaces inherited from class org.eclipse.xtext.parser.antlr.XtextTokenStream

XtextTokenStream.HiddenTokens

Field Summary

Fields inherited from class org.antlr.runtime.CommonTokenStream

channel, channelOverrideMap, discardOffChannelTokens, discardSet, lastMarker, p, tokens, tokenSource

Constructor Summary

ObservableXtextTokenStream()

ObservableXtextTokenStream(org.antlr.runtime.TokenSource tokenSource, int channel)

ObservableXtextTokenStream(org.antlr.runtime.TokenSource tokenSource, ITokenDefProvider tokenDefProvider)

Method Summary

void	consume() Move the input pointer to the next incoming token.
ObservableXtextTokenStream.StreamListener	getListener()
int	LA(int i) Get int at current input pointer + i ahead where i=1 is next int.
int	mark() Tell the stream to start buffering if it hasn't already.
void	rewind(int marker) Reset the stream so that next call to index would return marker.
void	setListener(ObservableXtextTokenStream.StreamListener listener)

Methods inherited from class org.eclipse.xtext.parser.antlr.XtextTokenStream

doSetHiddenTokens, getCurrentLookAhead, getLexerErrorMessage, initCurrentLookAhead, LT, seek, setHiddenTokens, setInitialHiddenTokens, skipHiddenTokens, toString

Methods inherited from class org.antlr.runtime.CommonTokenStream

discardOffChannelTokens, discardTokenType, fillBuffer, get, getSourceName, getTokens, getTokens, getTokens, getTokens, getTokens, getTokenSource, index, LB, release, reset, rewind, setTokenSource, setTokenTypeChannel, size, skipOffTokenChannels, skipOffTokenChannelsReverse, toString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ObservableXtextTokenStream

public ObservableXtextTokenStream()

ObservableXtextTokenStream

public ObservableXtextTokenStream(org.antlr.runtime.TokenSource tokenSource,
                                  int channel)

ObservableXtextTokenStream

public ObservableXtextTokenStream(org.antlr.runtime.TokenSource tokenSource,
                                  ITokenDefProvider tokenDefProvider)

Method Detail

LA

public int LA(int i)

Description copied from interface: org.antlr.runtime.IntStream

Get int at current input pointer + i ahead where i=1 is next int. Negative indexes are allowed. LA(-1) is previous token (token just matched). LA(-i) where i is before first token should yield -1, invalid char / EOF.

Specified by:

LA in interface org.antlr.runtime.IntStream

Overrides:

LA in class XtextTokenStream

mark

public int mark()

Description copied from interface: org.antlr.runtime.IntStream

Tell the stream to start buffering if it hasn't already. Return current input position, index(), or some other marker so that when passed to rewind() you get back to the same spot. rewind(mark()) should not affect the input cursor. The Lexer track line/col info as well as input index so its markers are not pure input indexes. Same for tree node streams.

Specified by:

mark in interface org.antlr.runtime.IntStream

Overrides:

mark in class XtextTokenStream

rewind

public void rewind(int marker)

Description copied from interface: org.antlr.runtime.IntStream

Reset the stream so that next call to index would return marker. The marker will usually be index() but it doesn't have to be. It's just a marker to indicate what state the stream was in. This is essentially calling release() and seek(). If there are markers created after this marker argument, this routine must unroll them like a stack. Assume the state the stream was in when this marker was created.

Specified by:

rewind in interface org.antlr.runtime.IntStream

Overrides:

rewind in class org.antlr.runtime.CommonTokenStream

consume

public void consume()

Description copied from class: org.antlr.runtime.CommonTokenStream

Move the input pointer to the next incoming token. The stream must become active with LT(1) available. consume() simply moves the input pointer so that LT(1) points at the next input symbol. Consume at least one token. Walk past any token not on the channel the parser is listening to.

Specified by:

consume in interface org.antlr.runtime.IntStream

Overrides:

consume in class XtextTokenStream

setListener

public void setListener(ObservableXtextTokenStream.StreamListener listener)

getListener

public ObservableXtextTokenStream.StreamListener getListener()