我是 ANTLR4 的新手。我正在尝试处理一种名为 Mo 的玩具语言并打印标记文本及其类型。以下是我的 Mo.java 文件:import org.antlr.v4.runtime.*;import org.antlr.v4.runtime.tree.*;import static org.antlr.v4.runtime.CharStreams.fromFileName;public class Mo { public static void main (String [] args) { CharStream cs = null; try { cs = fromFileName(args[0]); //load the file } catch (Exception e) { System.err.println("No input file: " + e.getMessage()); return; } MoLexer lexer = new MoLexer(cs); //instantiate a lexer CommonTokenStream tokens = new CommonTokenStream(lexer); //scan stream for tokens MoParser parser = new MoParser(tokens); //parse the tokens ParseTree tree = parser.molang(); // parse the content and get the tree MoWalker listener = new MoWalker(); ParseTreeWalker walker = new ParseTreeWalker(); walker.walk(listener,tree); }}这是我的 MoWalker.java 文件:public class MoWalker extends MoBaseListener {public void enterMicrolang(MoParser.MolangContext ctx ) { for (int i = 0; i<ctx.children.size()-1; i++){ Token representedToken = ((TerminalNodeImpl) ctx.getChild(i)).getSymbol(); System.out.print("Token: "+representedToken.getText()); int typee = representedToken.getType(); System.out.println(" --- "+typee); }}public void exitMicrolang(MicroParser.MicrolangContext ctx ) { System.out.println( "Exiting R" ); }}我的问题:我想打印其名称,而不是将令牌类型打印为整数。(即如果类型是INTLITERAL(==4) 而不是打印4 我想打印INTLITERAL)我所以这篇文章,但它使用词汇类。有没有其他方法,比如类似的东西 getSymbolType(int type) ?
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