org.antlr.runtime.debug
Class Tracer

java.lang.Object
  org.antlr.runtime.debug.BlankDebugEventListener
      org.antlr.runtime.debug.Tracer

All Implemented Interfaces:

DebugEventListener

public class Tracer
extends BlankDebugEventListener

The default tracer mimics the traceParser behavior of ANTLR 2.x. This listens for debugging events from the parser and implies that you cannot debug and trace at the same time.

Field Summary

IntStream	input
protected int	level

Fields inherited from interface org.antlr.runtime.debug.DebugEventListener

FALSE, PROTOCOL_VERSION, TRUE

Constructor Summary

Tracer(IntStream input)

Method Summary

void	enterRule(java.lang.String ruleName) The parser has just entered a rule.
void	exitRule(java.lang.String ruleName) This is the last thing executed before leaving a rule.
java.lang.Object	getInputSymbol(int k)

Methods inherited from class org.antlr.runtime.debug.BlankDebugEventListener

addChild, becomeRoot, beginBacktrack, beginResync, commence, consumeHiddenToken, consumeNode, consumeToken, createNode, createNode, endBacktrack, endResync, enterAlt, enterDecision, enterSubRule, exitDecision, exitSubRule, location, LT, LT, mark, nilNode, recognitionException, rewind, rewind, semanticPredicate, setTokenBoundaries, terminate

Methods inherited from class java.lang.Object

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

Field Detail

input

public IntStream input

level

protected int level

Constructor Detail

Tracer

public Tracer(IntStream input)

Method Detail

enterRule

public void enterRule(java.lang.String ruleName)

Description copied from interface: DebugEventListener

The parser has just entered a rule. No decision has been made about which alt is predicted. This is fired AFTER init actions have been executed. Attributes are defined and available etc...

Specified by:

enterRule in interface DebugEventListener

Overrides:

enterRule in class BlankDebugEventListener

exitRule

public void exitRule(java.lang.String ruleName)

Description copied from interface: DebugEventListener

This is the last thing executed before leaving a rule. It is executed even if an exception is thrown. This is triggered after error reporting and recovery have occurred (unless the exception is not caught in this rule). This implies an "exitAlt" event.

Specified by:

exitRule in interface DebugEventListener

Overrides:

exitRule in class BlankDebugEventListener

getInputSymbol

public java.lang.Object getInputSymbol(int k)