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Merge pull request #880 from parrt/fix-parse-listeners 

Fix parse listeners
This commit is contained in:
Terence Parr 2015-05-22 13:00:36 -07:00
parent 4f0afdcf8e a8b67147c2
commit c2ea6aa491
4 changed files with 57 additions and 1 deletions
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1
runtime/Java/src/org/antlr/v4/runtime/Parser.java
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@ -626,7 +626,6 @@ public abstract class Parser extends Recognizer<Token, ParserATNSimulator> {
_ctx = localctx;
_ctx.start = _input.LT(1);
if (_buildParseTrees) addContextToParseTree();
if ( _parseListeners != null) triggerEnterRuleEvent();
}
public void exitRule() {

48
tool/playground/Main.java Normal file
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@ -0,0 +1,48 @@
import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.ParserRuleContext;
public class Main
{
public static void main(String[] args)
{
TParser parser = new TParser(new CommonTokenStream(new TLexer(new ANTLRInputStream("b"))));
parser.addParseListener(new MyTBaseListener());
parser.a();
System.out.println("######################");
parser = new TParser(new CommonTokenStream(new TLexer(new ANTLRInputStream("x"))));
parser.addParseListener(new MyTBaseListener());
parser.b();
}
private static class MyTBaseListener extends TBaseListener {
@Override
public void enterAlt1(TParser.Alt1Context ctx)
{
System.out.println("entering alt1");
}
@Override
public void exitAlt1(TParser.Alt1Context ctx)
{
System.out.println("exiting alt1");
}
@Override
public void enterB(TParser.BContext ctx) {
System.out.println("enter b");
}
@Override
public void exitB(TParser.BContext ctx) {
System.out.println("exiting b");
}
@Override
public void enterEveryRule(ParserRuleContext ctx) {
System.out.println("enterEveryRule");
}
}
}

8
tool/playground/T.g4 Normal file
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@ -0,0 +1,8 @@
grammar T;
a
: 'b' #alt1
| 'c' #alt2
;
b : 'x' | 'y' {} ;

1
tool/tool.iml
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@ -16,6 +16,7 @@
<sourceFolder url="file://$MODULE_DIR$/resources" type="java-resource" />
<sourceFolder url="file://$MODULE_DIR$/../gen3" isTestSource="false" />
<sourceFolder url="file://$MODULE_DIR$/../antlr4-maven-plugin/resources" type="java-resource" />
<sourceFolder url="file://$MODULE_DIR$/playground" isTestSource="false" />
<excludeFolder url="file://$MODULE_DIR$/../.idea" />
<excludeFolder url="file://$MODULE_DIR$/../antlr4-maven-plugin" />
<excludeFolder url="file://$MODULE_DIR$/../build" />