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new TestT

This commit is contained in:
Terence Parr 2012-10-11 20:23:15 -07:00
parent f73c319e42
commit b4cc0c70a6
1 changed files with 3 additions and 28 deletions
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31
tool/playground/TestT.java
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@ -1,13 +1,9 @@
import org.antlr.v4.runtime.BailErrorStrategy;
import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.CommonTokenFactory;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.ConsoleErrorListener;
import org.antlr.v4.runtime.DefaultErrorStrategy;
import org.antlr.v4.runtime.DiagnosticErrorListener;
import org.antlr.v4.runtime.ParserRuleContext;
import org.antlr.v4.runtime.RecognitionException;
import org.antlr.v4.runtime.UnbufferedCharStream;
import java.io.FileInputStream;
import java.io.InputStream;
@ -20,7 +16,7 @@ public class TestT {
if ( inputFile!=null ) {
is = new FileInputStream(inputFile);
}
CharStream input = new UnbufferedCharStream(is);
CharStream input = new ANTLRInputStream(is);
TLexer lex = new TLexer(input);
lex.setTokenFactory(new CommonTokenFactory(true));
@ -30,31 +26,10 @@ public class TestT {
parser.addErrorListener(new DiagnosticErrorListener());
ParserRuleContext tree = null;
parser.getInterpreter().setSLL(true); // try with just SLL(*)
// no errors messages or recovery wanted during first try
parser.removeErrorListeners();
parser.setErrorHandler(new BailErrorStrategy());
try {
tree = parser.s();
}
catch (RuntimeException ex) {
if (ex.getClass() == RuntimeException.class &&
ex.getCause() instanceof RecognitionException)
{
System.out.println("trying with LL(*)");
tokens.reset(); // rewind
// back to standard listeners/handlers
parser.addErrorListener(ConsoleErrorListener.INSTANCE);
parser.setErrorHandler(new DefaultErrorStrategy());
parser.getInterpreter().setSLL(false); // try full LL(*)
tree = parser.s();
}
}
// parser.getInterpreter().setSLL(true);
// parser.setTrace(true);
ParserRuleContext tree = parser.s();
System.out.println(tree.toStringTree(parser));
// tree.save(parser, "/tmp/t.ps");
}