antlr/tool/playground/TestT.java

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import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.CommonTokenFactory;
import org.antlr.v4.runtime.CommonTokenStream;
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import org.antlr.v4.runtime.DiagnosticErrorListener;
import org.antlr.v4.runtime.ParserRuleContext;
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import org.antlr.v4.runtime.UnbufferedCharStream;
import java.io.FileInputStream;
import java.io.InputStream;
public class TestT {
public static void main(String[] args) throws Exception {
String inputFile = null;
if ( args.length>0 ) inputFile = args[0];
InputStream is = System.in;
if ( inputFile!=null ) {
is = new FileInputStream(inputFile);
}
CharStream input = new UnbufferedCharStream(is);
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TLexer lex = new TLexer(input);
lex.setTokenFactory(new CommonTokenFactory(true));
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CommonTokenStream tokens = new CommonTokenStream(lex);
TParser parser = new TParser(tokens);
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parser.addErrorListener(new DiagnosticErrorListener());
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ParserRuleContext tree = parser.s();
System.out.println(tree.toStringTree(parser));
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// tree.save(parser, "/tmp/t.ps");
}
}